Alert archive / Florida / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 3, NWS Key West, FL
NWS Key West, FL issued this severe thunderstorm warning at Sep 29, 2001, 3:52 AM EDT for Monroe County, Florida. It was in force for 38 min. 1 report came from inside the area while it was in force.
The area
The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties, with what was reported inside it.
The facts
- Issued
- Sep 29, 2001, 3:52 AM EDT (07:52 UTC)
- Expired
- Sep 29, 2001, 4:30 AM EDT
- In force
- 38 min
- Issued by
- NWS Key West, FL
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Monroe County, FL
The radar
The Key West radar (KBYX), 3 km from the middle of the area, began a volume at 07:53 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Sep 29, 4:00 AM EDT | Thunderstorm Wind 50 E | Stock Is, FL | 3 Doors to storage buildings of a hydrogen gas company were blown off. |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
The nearest sounding before it
Key West, FL (KEYW), launched 00:00Z, 7.9 hours before the alert went out and 3 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 1248 J/kg
- Mixed-layer CIN
- -1 J/kg
- Mixed-layer LCL
- 638 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 103 m²/s²
- 0-3 km storm-relative helicity
- 206 m²/s²
- Significant tornado parameter
- 0.4
- Supercell composite
- 3.6
The text
As transmitted, in the capitals the NWS used until 2016.
892
WUUS52 KEYW 290756
SVREYW
FLC087-290830-
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE KEY WEST FL
352 AM EDT SAT SEP 29 2001
THE NATIONAL WEATHER SERVICE IN KEY WEST HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
LOWER KEYS IN MONROE COUNTY IN FLORIDA
* UNTIL 430 AM EDT
* AT 352 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM WITH DAMAGING WINDS ALONG A LINE EXTENDING FROM
11 MILES NORTHWEST OF KEY WEST TO 14 MILES SOUTHWEST OF KEY WEST...
MOVING EAST AT 20 MPH.
* SOME LOCATIONS NEAR THE PATH OF THE STORM THROUGH 430 AM EDT...
KEY WEST...
STOCK ISLAND...
BOCA CHICA...
BIG COPPITT KEY...
UPPER SUGARLOAF KEY AND SUGARLOAF KEY...
VERY HEAVY RAIN AND STRONG DAMAGING WINDS ARE LIKELY WITH THIS STORM.
TAKE COVER IN A SUBSTANTIAL SHELTER UNTIL THE STORM PASSES.
LAT...LON 2479 8191 2456 8196 2431 8200 2431 8149
2456 8145 2479 8140
.END
JEB/BSNearby
Severe Thunderstorm Warnings in Florida, 2001Every severe thunderstorm warning in 2001
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.