Hurricane Intelligence Florida
Hurricane Intelligence Florida: Florida impacts and ENSO, 1851 to present. A JnGmedia property.

Zone-by-zone intensification, all four detection eras

Zone Lab

Research Question

Where, in which detection eras, and under which storms does a hurricane tend to intensify or weaken as it moves through Florida's approach corridors? Same interpolation method throughout: per-cell average wind speed change (kt per step), inverse-distance-weighted from 3,069individual track-step transitions across 125storm-era entries drawn from hintfl.com's authoritative storms.json, covering full storm tracks (approach, landfall, and post-landfall legs -- e.g. a storm crossing Florida into the Gulf and making a second landfall is followed all the way through), masked to each zone's own footprint using only the currently-selected points. Blue = weakening, tan/neutral = flat, red = intensifying.
Data quality is genuinely uneven across eras, not a uniform "old vs. new" split -- tap for detail
Validated against the NOAA/AMS Atlantic Hurricane Database Reanalysis Project's published phase boundaries (Landsea et al. 2004a; 2008 reanalysis) and wireless-ship-telegraphy adoption history. Pre-1911: ship reports and land stations only, reconstructed via the Fernandez-Partagas & Diaz method. 1911-1943: station data plus COADS ship network, decades before aircraft or satellite. 1944-1967: aircraft reconnaissance era, pre-radar/pre-satellite. 1968-present: radar and satellite tracking. A zone's hatching (insufficient sample) is computed live from whichever storms are currently checked — toggle an era off and watch zones that were solid re-hatch as their sample drops below 5 points, or vice versa.

Global Filters & Matching Storms

Each block below is one detection era: the toggle/select-all/select-none buttons are the FILTER (include or exclude this era entirely); the checkbox list beneath each one is the MATCHING STORMS that filter currently includes, individually switchable -- uncheck one storm without dropping its whole era.

ENSO phase quick-filter (layers on top of the era/storm selection above) -- tap for detail

Unchecking a phase here hides those storms from the checkbox lists above AND removes them from the map, even if their era checkbox is still checked. A storm's own checked/unchecked state is remembered while it's hidden -- re-checking its phase brings it back exactly as you left it. The ONI record used to classify phase only goes back to 1950; storms before that are grouped as "Pre-ONI" rather than guessed at.

Map Display Controls

These change how the map and tooltip RENDER the storms selected above -- they never change which storms are included.

View this selection on the Track Map ↗
What "Metric" and "Weighting" mean -- tap for detail

Wind speed is the map's original metric (kt/step). Pressure is sign-corrected so positive still means intensifying (pressure FALLING), matching the wind convention -- never read a positive pressure number as "pressure went up." Pressure coverage is far sparser than wind (roughly 65% of all track points across the dataset have no recorded pressure at all, concentrated pre-1911), so expect more hatched/insufficient zones under Pressure, especially in older eras -- that's a real property of the source data, not a bug in this toggle.

Observation-weighted is the map's original method -- a storm that loops or stalls near one spot contributes many points there and can dominate that area's color. Storm-balanced first averages each storm's own nearby points, then averages those per-storm results equally, so one slow/looping storm no longer outweighs several storms that each just passed through once. Neither is "more correct" -- they answer different questions (what did the raw observations show vs. what did each storm, on average, do). Which zones count as "insufficient sample" (the hatched pattern) is unaffected by this toggle -- that gate is still based on point count, not storm count.

Scroll or pinch to zoom, drag to pan — or use the zoom controls above if your browser/trackpad doesn't pass scroll events through.
-10 kt/step (weakening)
+10 kt/step (intensifying)

Zone Comparison

Pick two zones to compare side by side. Uses the same static, full-dataset numbers as the listing below -- it does not respond to the era/storm filters above, matching how the Zone Statistics panel already behaves (both are pre-computed at enrichment time, not recomputed live from the current selection).

Zone Statistics

Per-zone numbers behind the map above. A track step counts toward a zone here ONLY if that exact point falls inside it -- a stricter rule than the map's own smoothed interpolation, so these counts will not match the map's sample sizes exactly; both rules are legitimate for what they're each for. RI% (wind only -- rapid intensification is inherently a wind concept, no analogue is computed for pressure) is the share of steps whose wind change normalizes to at least 30kt per 24 hours. Every mean/median below is shown both ways -- observation-weighted (every step counts once) and storm-balanced (every storm counts once) -- same distinction as the map's own weighting toggle above. Pressure coverage is far sparser than wind (roughly 65% of all track points have no recorded pressure, concentrated pre-1911) -- expect smaller samples and more "no qualifying steps" under Pressure.

GEZ (Gulf Enrichment Zone) 634 wind steps, 102 storms

mean delta: 1.53 kt/step (observation-weighted), 1.56 kt/step (storm-balanced) | median: 0 / 1.25 | RI: 18.6% of 634 eligible steps

typical storm's full pass through this zone (n=102 storms): net +5 kt, up to +15 kt above its low point, down 0 kt from its high point, fastest single step ±1.67 kt/hr (magnitude only -- can be either direction)

This is the median across every storm that passed through the zone, not just the 5 examples below -- a different, per-storm-visit lens on the same zone the mean/median line above measures per individual step.

By era (observation-weighted / storm-balanced): 1911-1943 -0.74 / -0.44kt (n=121, 19 storms) · 1944-1967 1.24 / 1.14kt (n=93, 18 storms) · Modern 2.98 / 2.99kt (n=196, 28 storms) · Pre-1911 1.61 / 1.71kt (n=224, 37 storms)

⚠ 1911-1943: 2 storm(s) individually flip this era's sign if removed -- this result is fragile, not robust
  • AL101924 1924 (n=6 steps here): without it, mean shifts by +0.57kt
  • AL101926 1926 (n=1 steps here): without it, mean shifts by +0.53kt

By approach: atlantic 1.22kt (n=226) · gulf 1.7kt (n=408)

By ENSO phase (observation-weighted / storm-balanced, Pre-ONI = before the 1950 ONI record): El Ni\u00f1o 3.2 / 3.37kt (n=50, 10 storms) · La Ni\u00f1a 3.72 / 3.06kt (n=47, 9 storms) · Neutral 2.17 / 2.22kt (n=161, 19 storms) · Pre-ONI 0.76 / 0.87kt (n=376, 64 storms)

Strongest transitions:

  • Charley 2004: +30 kt over 6h (20040813) · net +20 kt over its full 16.25h in this zone · up to +35 kt above its low point · down -10 kt from its high point · fastest single step +5 kt/hr
  • Dennis 2005: -25 kt over 6h (20050709) · net +10 kt over its full 42h in this zone · up to +50 kt above its low point · down -25 kt from its high point · fastest single step -4.17 kt/hr
  • Katrina 2005: +25 kt over 6h (20050828) · net +80 kt over its full 66h in this zone · up to +85 kt above its low point · down -5 kt from its high point · fastest single step +4.17 kt/hr
  • Rita 2005: +25 kt over 6h (20050921) · net +65 kt over its full 60h in this zone · up to +95 kt above its low point · down -30 kt from its high point · fastest single step +4.17 kt/hr
  • AL011898 1898: +20 kt over 6h (18980802) · net +35 kt over its full 11h in this zone · up to +35 kt above its low point · fastest single step +3.33 kt/hr
Lowrider 398 wind steps, 58 storms

mean delta: 2.76 kt/step (observation-weighted), 2.18 kt/step (storm-balanced) | median: 0 / 2 | RI: 16.3% of 398 eligible steps

typical storm's full pass through this zone (n=58 storms): net +10 kt, up to +20 kt above its low point, down 0 kt from its high point, fastest single step ±1.67 kt/hr (magnitude only -- can be either direction)

This is the median across every storm that passed through the zone, not just the 5 examples below -- a different, per-storm-visit lens on the same zone the mean/median line above measures per individual step.

By era (observation-weighted / storm-balanced): 1911-1943 2.9 / 1.91kt (n=126, 15 storms) · 1944-1967 3.24 / 2.38kt (n=94, 12 storms) · Modern 2.1 / 1.63kt (n=81, 14 storms) · Pre-1911 2.68 / 2.74kt (n=97, 17 storms)

By approach: atlantic 2.59kt (n=330) · gulf 3.6kt (n=68)

By ENSO phase (observation-weighted / storm-balanced, Pre-ONI = before the 1950 ONI record): El Ni\u00f1o 1.28 / -0.06kt (n=39, 4 storms) · La Ni\u00f1a 4.12 / 2.67kt (n=17, 6 storms) · Neutral 2.8 / 3.43kt (n=84, 11 storms) · Pre-ONI 2.89 / 1.98kt (n=258, 37 storms)

Strongest transitions:

  • Labor Day 1935: +25 kt over 6h (19350903) · net +110 kt over its full 68h in this zone · up to +125 kt above its low point · fastest single step +4.17 kt/hr
  • King 1950: +20 kt over 6h (19501017) · net +40 kt over its full 18h in this zone · up to +40 kt above its low point · fastest single step +3.33 kt/hr
  • Betsy 1965: +20 kt over 6h (19650902) · net +65 kt over its full 83h in this zone · up to +85 kt above its low point · down -25 kt from its high point · fastest single step +3.33 kt/hr
  • Labor Day 1935: +15 kt over 6h (19350902) · net +110 kt over its full 68h in this zone · up to +125 kt above its low point · fastest single step +4.17 kt/hr
  • Labor Day 1935: +15 kt over 6h (19350902) · net +110 kt over its full 68h in this zone · up to +125 kt above its low point · fastest single step +4.17 kt/hr
Carib East 110 wind steps, 21 storms

mean delta: 3.5 kt/step (observation-weighted), 3.09 kt/step (storm-balanced) | median: 0 / 2.0588235294118 | RI: 20.9% of 110 eligible steps

typical storm's full pass through this zone (n=21 storms): net +10 kt, up to +10 kt above its low point, down 0 kt from its high point, fastest single step ±0.83 kt/hr (magnitude only -- can be either direction)

This is the median across every storm that passed through the zone, not just the 5 examples below -- a different, per-storm-visit lens on the same zone the mean/median line above measures per individual step.

By era (observation-weighted / storm-balanced): 1911-1943 3.13 / 3.02kt (n=16, 4 storms) · 1944-1967 6 / 5.56kt (n=5, 3 storms) · Modern 4.12 / 3.54kt (n=57, 6 storms) · Pre-1911 2.19 / 1.85kt (n=32, 8 storms)

By approach: atlantic 3.91kt (n=23) · gulf 3.39kt (n=87)

By ENSO phase (observation-weighted / storm-balanced, Pre-ONI = before the 1950 ONI record): El Ni\u00f1o 3.21 / 3.53kt (n=28, 2 storms) · La Ni\u00f1a 0.63 / 0.42kt (n=8, 2 storms) · Neutral 6.67 / 6.68kt (n=24, 3 storms) · Pre-ONI 2.6 / 2.63kt (n=50, 14 storms)

Strongest transitions:

  • Ivan 2004: +20 kt over 6h (20040911) · net +35 kt over its full 92.5h in this zone · up to +35 kt above its low point · down -20 kt from its high point · fastest single step +3.33 kt/hr
  • Matthew 2016: +20 kt over 6h (20160930) · net +70 kt over its full 60h in this zone · up to +75 kt above its low point · fastest single step +3.33 kt/hr
  • Ivan 2004: +15 kt over 6h (20040911) · net +35 kt over its full 92.5h in this zone · up to +35 kt above its low point · down -20 kt from its high point · fastest single step +3.33 kt/hr
  • Matthew 2016: +15 kt over 6h (20160930) · net +70 kt over its full 60h in this zone · up to +75 kt above its low point · fastest single step +3.33 kt/hr
  • Matthew 2016: +15 kt over 6h (20160930) · net +70 kt over its full 60h in this zone · up to +75 kt above its low point · fastest single step +3.33 kt/hr
Carib West/Yucatan 482 wind steps, 49 storms

mean delta: 3.49 kt/step (observation-weighted), 3.16 kt/step (storm-balanced) | median: 5 / 3.3333333333333 | RI: 17.6% of 482 eligible steps

typical storm's full pass through this zone (n=49 storms): net +30 kt, up to +30 kt above its low point, down 0 kt from its high point, fastest single step ±1.67 kt/hr (magnitude only -- can be either direction)

This is the median across every storm that passed through the zone, not just the 5 examples below -- a different, per-storm-visit lens on the same zone the mean/median line above measures per individual step.

By era (observation-weighted / storm-balanced): 1911-1943 4.13 / 3.11kt (n=80, 7 storms) · 1944-1967 4.2 / 4kt (n=112, 13 storms) · Modern 3.52 / 3.01kt (n=108, 13 storms) · Pre-1911 2.75 / 2.62kt (n=182, 16 storms)

By approach: atlantic 4.81kt (n=79) · gulf 3.23kt (n=403)

By ENSO phase (observation-weighted / storm-balanced, Pre-ONI = before the 1950 ONI record): El Ni\u00f1o 2.75 / 3.58kt (n=51, 8 storms) · La Ni\u00f1a 3.45 / 3.07kt (n=42, 4 storms) · Neutral 3.87 / 2.48kt (n=71, 8 storms) · Pre-ONI 3.52 / 3.24kt (n=318, 29 storms)

Strongest transitions:

  • Wilma 2005: +55 kt over 6h (20051019) · net +105 kt over its full 108h in this zone · up to +135 kt above its low point · down -30 kt from its high point · fastest single step +9.17 kt/hr
  • AL061882 1882: -20 kt over 6h (18821009) · net +60 kt over its full 102h in this zone · up to +80 kt above its low point · down -20 kt from its high point · fastest single step -3.33 kt/hr
  • AL101926 1926: +20 kt over 6h (19261019) · net +70 kt over its full 72h in this zone · up to +70 kt above its low point · fastest single step +3.33 kt/hr
  • AL091948 1948: +20 kt over 6h (19481005) · net +80 kt over its full 43h in this zone · up to +80 kt above its low point · fastest single step +3.33 kt/hr
  • AL091948 1948: +20 kt over 6h (19481005) · net +80 kt over its full 43h in this zone · up to +80 kt above its low point · fastest single step +3.33 kt/hr
Yucatan Channel Drag Pocket 31 wind steps, 18 storms

mean delta: 2.74 kt/step (observation-weighted), 3.01 kt/step (storm-balanced) | median: 5 / 2.5 | RI: 19.4% of 31 eligible steps

typical storm's full pass through this zone (n=18 storms): net +5 kt, up to +5 kt above its low point, down 0 kt from its high point, fastest single step ±0.83 kt/hr (magnitude only -- can be either direction)

This is the median across every storm that passed through the zone, not just the 5 examples below -- a different, per-storm-visit lens on the same zone the mean/median line above measures per individual step.

By era (observation-weighted / storm-balanced): 1911-1943 0 / 0kt (n=1, 1 storms) · 1944-1967 2.22 / 2.83kt (n=9, 5 storms) · Modern 1.25 / 2.5kt (n=8, 6 storms) · Pre-1911 4.23 / 4.17kt (n=13, 6 storms)

By approach: atlantic 0kt (n=3) · gulf 3.04kt (n=28)

By ENSO phase (observation-weighted / storm-balanced, Pre-ONI = before the 1950 ONI record): El Ni\u00f1o 2.22 / 3.57kt (n=9, 7 storms) · Neutral 1 / 0.83kt (n=5, 3 storms) · Pre-ONI 3.53 / 3.33kt (n=17, 8 storms)

Strongest transitions:

  • Ivan 2004: -15 kt over 6h (20040914) · net -15 kt over its full 11h in this zone · down -15 kt from its high point · fastest single step -2.5 kt/hr
  • AL021882 1882: +10 kt over 6h (18820907)
  • AL051910 1910: -10 kt over 6h (19101014) · net +20 kt over its full 24h in this zone · up to +30 kt above its low point · down -10 kt from its high point · fastest single step -1.67 kt/hr
  • AL051910 1910: +10 kt over 6h (19101016) · net +20 kt over its full 24h in this zone · up to +30 kt above its low point · down -10 kt from its high point · fastest single step -1.67 kt/hr
  • AL051910 1910: +10 kt over 6h (19101016) · net +20 kt over its full 24h in this zone · up to +30 kt above its low point · down -10 kt from its high point · fastest single step -1.67 kt/hr
Island Drag Area 403 wind steps, 53 storms

mean delta: -0.38 kt/step (observation-weighted), 0.4 kt/step (storm-balanced) | median: 0 / 0 | RI: 14.9% of 403 eligible steps

typical storm's full pass through this zone (n=53 storms): net 0 kt, up to +10 kt above its low point, down -10 kt from its high point, fastest single step ±1.67 kt/hr (magnitude only -- can be either direction)

This is the median across every storm that passed through the zone, not just the 5 examples below -- a different, per-storm-visit lens on the same zone the mean/median line above measures per individual step.

By era (observation-weighted / storm-balanced): 1911-1943 2.86 / 2.72kt (n=63, 9 storms) · 1944-1967 -1.11 / 1.62kt (n=81, 10 storms) · Modern -0.7 / 0.31kt (n=115, 13 storms) · Pre-1911 -1.15 / -1.12kt (n=144, 21 storms)

⚠ Modern: 3 storm(s) individually flip this era's sign if removed -- this result is fragile, not robust
  • Elena 1985 (n=3 steps here): without it, mean shifts by -0.39kt
  • Charley 2004 (n=3 steps here): without it, mean shifts by -0.39kt
  • Ivan 2004 (n=2 steps here): without it, mean shifts by -0.39kt

By approach: atlantic -1.05kt (n=256) · gulf 0.78kt (n=147)

By ENSO phase (observation-weighted / storm-balanced, Pre-ONI = before the 1950 ONI record): El Ni\u00f1o 1.61 / 3.04kt (n=31, 4 storms) · La Ni\u00f1a -0.96 / -0.65kt (n=57, 4 storms) · Neutral -1.78 / -0.16kt (n=101, 12 storms) · Pre-ONI 0.14 / 0.41kt (n=214, 33 storms)

Strongest transitions:

  • Inez 1966: -40 kt over 4h (19660929) · net -55 kt over its full 108h in this zone · up to +40 kt above its low point · down -90 kt from its high point · fastest single step -10 kt/hr
  • Cleo 1964: -35 kt over 4h (19640825) · net -40 kt over its full 96h in this zone · up to +30 kt above its low point · down -70 kt from its high point · fastest single step -8.75 kt/hr
  • David 1979: -35 kt over 6h (19790901) · net -60 kt over its full 84h in this zone · up to +30 kt above its low point · down -90 kt from its high point · fastest single step -5.83 kt/hr
  • David 1979: -30 kt over 6h (19790901) · net -60 kt over its full 84h in this zone · up to +30 kt above its low point · down -90 kt from its high point · fastest single step -5.83 kt/hr
  • Georges 1998: -25 kt over 6h (19980923) · net -20 kt over its full 96h in this zone · up to +15 kt above its low point · down -40 kt from its high point · fastest single step -5 kt/hr
Divergence Diamond 32 wind steps, 17 storms

mean delta: -0.47 kt/step (observation-weighted), 0.34 kt/step (storm-balanced) | median: 0 / 0 | RI: 6.3% of 32 eligible steps

typical storm's full pass through this zone (n=17 storms): net 0 kt, up to +0 kt above its low point, down 0 kt from its high point, fastest single step ±0.83 kt/hr (magnitude only -- can be either direction)

This is the median across every storm that passed through the zone, not just the 5 examples below -- a different, per-storm-visit lens on the same zone the mean/median line above measures per individual step.

By era (observation-weighted / storm-balanced): 1911-1943 0.42 / 0.63kt (n=12, 8 storms) · 1944-1967 0 / 0kt (n=4, 2 storms) · Modern -2.22 / 0.21kt (n=9, 4 storms) · Pre-1911 0 / 0kt (n=7, 3 storms)

⚠ 1911-1943: 2 storm(s) individually flip this era's sign if removed -- this result is fragile, not robust
  • AL051941 1941 (n=1 steps here): without it, mean shifts by -1.34kt
  • AL111933 1933 (n=1 steps here): without it, mean shifts by -0.63kt
⚠ Modern: 2 storm(s) individually flip this era's sign if removed -- this result is fragile, not robust
  • Jeanne 2004 (n=1 steps here): without it, mean shifts by -1.6kt
  • Katrina 2005 (n=1 steps here): without it, mean shifts by -1.6kt

By approach: atlantic -0.47kt (n=32)

By ENSO phase (observation-weighted / storm-balanced, Pre-ONI = before the 1950 ONI record): El Ni\u00f1o -0.71 / 0.83kt (n=7, 3 storms) · Neutral -2.5 / -0.56kt (n=6, 3 storms) · Pre-ONI 0.26 / 0.45kt (n=19, 11 storms)

Strongest transitions:

  • Andrew 1992: -15 kt over 3h (19920824) · net -20 kt over its full 7h in this zone · up to +5 kt above its low point · down -25 kt from its high point · fastest single step -5 kt/hr
  • AL021929 1929: -10 kt over 6h (19290926)
  • AL051941 1941: +10 kt over 6h (19411005)
  • Andrew 1992: -10 kt over 3h (19920823) · net -20 kt over its full 7h in this zone · up to +5 kt above its low point · down -25 kt from its high point · fastest single step -5 kt/hr
  • AL011926 1926: -5 kt over 6h (19260726) · net -10 kt over its full 12h in this zone · down -10 kt from its high point · fastest single step -0.83 kt/hr
Highrider 267 wind steps, 47 storms

mean delta: 1.61 kt/step (observation-weighted), 0.12 kt/step (storm-balanced) | median: 0 / 0 | RI: 10.5% of 267 eligible steps

typical storm's full pass through this zone (n=47 storms): net 0 kt, up to +0 kt above its low point, down 0 kt from its high point, fastest single step ±0.83 kt/hr (magnitude only -- can be either direction)

This is the median across every storm that passed through the zone, not just the 5 examples below -- a different, per-storm-visit lens on the same zone the mean/median line above measures per individual step.

By era (observation-weighted / storm-balanced): 1911-1943 2.53 / 1.04kt (n=77, 14 storms) · 1944-1967 0.9 / 0.75kt (n=50, 9 storms) · Modern 2.54 / 1.42kt (n=57, 11 storms) · Pre-1911 0.54 / -2.42kt (n=83, 13 storms)

By approach: atlantic 1.88kt (n=242) · gulf -1kt (n=25)

By ENSO phase (observation-weighted / storm-balanced, Pre-ONI = before the 1950 ONI record): El Ni\u00f1o 0.73 / -1.5kt (n=48, 5 storms) · La Ni\u00f1a 1.67 / 0.71kt (n=12, 4 storms) · Neutral 5.87 / 4.9kt (n=23, 5 storms) · Pre-ONI 1.3 / -0.44kt (n=184, 33 storms)

Strongest transitions:

  • AL051873 1873: -20 kt over 5h (18731007)
  • Andrew 1992: +20 kt over 6h (19920823) · net +110 kt over its full 84h in this zone · up to +110 kt above its low point · fastest single step +3.33 kt/hr
  • Andrew 1992: +15 kt over 6h (19920822) · net +110 kt over its full 84h in this zone · up to +110 kt above its low point · fastest single step +3.33 kt/hr
  • Andrew 1992: +15 kt over 6h (19920822) · net +110 kt over its full 84h in this zone · up to +110 kt above its low point · fastest single step +3.33 kt/hr
  • Andrew 1992: +15 kt over 6h (19920823) · net +110 kt over its full 84h in this zone · up to +110 kt above its low point · fastest single step +3.33 kt/hr
Atlantic Zone 186 wind steps, 48 storms

mean delta: -0.22 kt/step (observation-weighted), -0.52 kt/step (storm-balanced) | median: 0 / 0 | RI: 7% of 186 eligible steps

typical storm's full pass through this zone (n=48 storms): net 0 kt, up to +0 kt above its low point, down 0 kt from its high point, fastest single step ±0.83 kt/hr (magnitude only -- can be either direction)

This is the median across every storm that passed through the zone, not just the 5 examples below -- a different, per-storm-visit lens on the same zone the mean/median line above measures per individual step.

By era (observation-weighted / storm-balanced): 1911-1943 -0.68 / 0.29kt (n=44, 7 storms) · 1944-1967 -0.22 / 1.33kt (n=46, 10 storms) · Modern -0.16 / -0.7kt (n=31, 11 storms) · Pre-1911 0.08 / -1.62kt (n=65, 20 storms)

⚠ 1911-1943: 2 storm(s) individually flip this era's sign if removed -- this result is fragile, not robust
  • AL011915 1915 (n=1 steps here): without it, mean shifts by -0.78kt
  • AL071935 1935 (n=2 steps here): without it, mean shifts by -0.36kt
⚠ Modern: 1 storm(s) individually flip this era's sign if removed -- this result is fragile, not robust
  • Gladys 1968 (n=1 steps here): without it, mean shifts by +0.93kt

By approach: atlantic 0.58kt (n=120) · gulf -1.67kt (n=66)

By ENSO phase (observation-weighted / storm-balanced, Pre-ONI = before the 1950 ONI record): El Ni\u00f1o -0.48 / -0.91kt (n=21, 6 storms) · La Ni\u00f1a 0 / 0.48kt (n=25, 4 storms) · Neutral -2.14 / -0.56kt (n=14, 6 storms) · Pre-ONI 0 / -0.56kt (n=126, 32 storms)

Strongest transitions:

  • AL071888 1888: -25 kt over 5h (18881011)
  • Jeanne 2004: +15 kt over 6h (20040920) · net +25 kt over its full 48h in this zone · up to +25 kt above its low point · fastest single step +2.5 kt/hr
  • AL081859 1859: -10 kt over 6h (18591029) · net -20 kt over its full 12h in this zone · down -20 kt from its high point · fastest single step -1.67 kt/hr
  • AL081859 1859: -10 kt over 6h (18591029) · net -20 kt over its full 12h in this zone · down -20 kt from its high point · fastest single step -1.67 kt/hr
  • Twin Key West (I) 1870: -10 kt over 6h (18701013) · net -10 kt over its full 30h in this zone · down -10 kt from its high point · fastest single step -1.67 kt/hr
Florida Landmass 367 wind steps, 102 storms

mean delta: -6.05 kt/step (observation-weighted), -5.74 kt/step (storm-balanced) | median: -5 / -5.7142857142857 | RI: 2.7% of 367 eligible steps

typical storm's full pass through this zone (n=102 storms): net -20 kt, up to +0 kt above its low point, down -20 kt from its high point, fastest single step ±3.33 kt/hr (magnitude only -- can be either direction)

This is the median across every storm that passed through the zone, not just the 5 examples below -- a different, per-storm-visit lens on the same zone the mean/median line above measures per individual step.

By era (observation-weighted / storm-balanced): 1911-1943 -6.43 / -6.41kt (n=84, 20 storms) · 1944-1967 -6.93 / -6.9kt (n=83, 21 storms) · Modern -6.28 / -5.93kt (n=78, 27 storms) · Pre-1911 -5.04 / -4.49kt (n=122, 34 storms)

By approach: atlantic -5.57kt (n=244) · gulf -6.99kt (n=123)

By ENSO phase (observation-weighted / storm-balanced, Pre-ONI = before the 1950 ONI record): El Ni\u00f1o -6.88 / -6.21kt (n=32, 11 storms) · La Ni\u00f1a -6.19 / -6.79kt (n=42, 10 storms) · Neutral -6.2 / -5.58kt (n=54, 18 storms) · Pre-ONI -5.88 / -5.54kt (n=239, 63 storms)

Strongest transitions:

  • Charley 2004: -50 kt over 3.25h (20040814) · net -50 kt over its full 6h in this zone · up to +5 kt above its low point · down -55 kt from its high point · fastest single step -15.38 kt/hr
  • AL111933 1933: -45 kt over 6h (19330904) · net -60 kt over its full 42h in this zone · down -60 kt from its high point · fastest single step -7.5 kt/hr
  • Great Miami 1926: -35 kt over 6h (19260918) · net -40 kt over its full 22h in this zone · up to +10 kt above its low point · down -35 kt from its high point · fastest single step -5.83 kt/hr
  • King 1950: -35 kt over 6h (19501018) · net -40 kt over its full 24h in this zone · up to +10 kt above its low point · down -50 kt from its high point · fastest single step -5.83 kt/hr
  • Ian 2022: -35 kt over 6h (20220929) · net -75 kt over its full 18h in this zone · down -75 kt from its high point · fastest single step -7.31 kt/hr
↑ Top