Alert archive / Florida / Tornado Warnings in 2008
Tornado Warning 7, NWS Key West, FL
NWS Key West, FL issued this tornado warning at Aug 30, 2008, 7:39 PM EDT for Monroe County, Florida. It was in force for 19 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Aug 30, 2008, 7:39 PM EDT (23:39 UTC)
- Expired
- Aug 30, 2008, 7:58 PM EDT
- In force
- 19 min
- Issued by
- NWS Key West, FL
- Area
- Storm-based polygon
County Monroe County, FL
The radar
The Key West radar (KBYX), 70 km from the middle of the area, began a volume at 23:42 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.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Aug 30, 5:05 PM EDT | Tornado Watch | SPC | 9 hr |
The nearest sounding before it
Key West, FL (KEYW), launched 12:00Z, 11.7 hours before the alert went out and 73 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
- 1273 J/kg
- Mixed-layer CIN
- -24 J/kg
- Mixed-layer LCL
- 1055 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 95 m²/s²
- 0-3 km storm-relative helicity
- 119 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
WFUS52 KKEY 302339
TORKEY
FLC087-310015-
/O.NEW.KKEY.TO.W.0007.080830T2339Z-080831T0015Z/
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE KEY WEST FL
739 PM EDT SAT AUG 30 2008
THE NATIONAL WEATHER SERVICE IN KEY WEST HAS ISSUED A
* TORNADO WARNING FOR...
LOWER KEYS IN MONROE COUNTY IN FLORIDA...
MIDDLE KEYS IN MONROE COUNTY IN FLORIDA...
THIS INCLUDES THE COMMUNITY OF MARATHON...
* UNTIL 815 PM EDT
* AT 733 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
A VIOLENT WATERSPOUT 6 MILES SOUTHEAST OF DUCK KEY...MOVING WEST
AT 25 MPH.
* THE TORNADO WILL BE NEAR...
DUCK KEY BY 745 PM EDT...
GRASSY KEY BY 750 PM EDT...
MARATHON BY 800 PM EDT...
MARATHON AND BOOT KEY BY 805 PM EDT...
KNIGHT KEY BY 810 PM EDT...
PIDGEON KEY BY 815 PM EDT...
WHEN A TORNADO WARNING IS ISSUED BASED ON DOPPLER RADAR...IT MEANS
THAT STRONG ROTATION HAS BEEN DETECTED IN THE STORM. A TORNADO MAY
ALREADY BE ON THE GROUND...OR IS EXPECTED TO DEVELOP SHORTLY.
TORNADOES ASSOCIATED WITH TROPICAL CYCLONES MOVE RAPIDLY...ARE OFTEN
WRAPPED IN HEAVY RAIN...AND ARE DIFFICULT TO SEE OR HEAR UNTIL THEY
ARE VERY CLOSE. SEEK SAFE SHELTER IMMEDIATELY
THIS IS AN EXTREMELY DANGEROUS AND LIFE THREATENING SITUATION. THIS
STORM IS CAPABLE OF PRODUCING STRONG TO VIOLENT TORNADOES. IF YOU
ARE IN THE PATH OF THIS DANGEROUS STORM...MOVE INDOORS AND TO THE
LOWEST LEVEL OF THE BUILDING. STAY AWAY FROM WINDOWS. IF DRIVING...DO
NOT SEEK SHELTER UNDER A HIGHWAY OVERPASS.
PLEASE REPORT SEVERE WEATHER TO THE NATIONAL WEATHER SERVICE KEY WEST
AT 3 0 5...2 9 5...1 3 1 6...EXTENSION 3.
A TORNADO WATCH REMAINS IN EFFECT UNTIL 100 AM EDT SUNDAY MORNING FOR
ALL OF THE FLORIDA KEYS.
LAT...LON 2469 8117 2472 8117 2476 8100 2480 8095
2480 8088 2477 8088 2475 8090 2470 8105
2467 8108
TIME...MOT...LOC 2338Z 103DEG 24KT 2471 8089
$$
111 follow-up statement
000
WWUS52 KKEY 302358
SVSKEY
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE KEY WEST FL
758 PM EDT SAT AUG 30 2008
FLC087-310005-
/O.CAN.KKEY.TO.W.0007.000000T0000Z-080831T0015Z/
LOWER KEYS IN MONROE FL-MIDDLE KEYS IN MONROE FL-
755 PM EDT SAT AUG 30 2008
...THE TORNADO WARNING FOR MIDDLE KEYS IN MONROE COUNTY IS
CANCELED...
AT 751 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THAT
THE STORM THAT PROMPTED THE TORNADO WARNING FOR MARATHON IN THE
MIDDLE KEYS...HAS MOVED NORTH OF THE ISLAND CHAIN. THEREFORE...THE
TORNADO WARNING HAS BEEN CANCELED.
A TORNADO WATCH REMAINS IN EFFECT UNTIL 100 AM EDT SUNDAY MORNING FOR
ALL OF THE FLORIDA KEYS...AND CONDITIONS REMAIN FAVORABLE FOR
TORNADO DEVELOPMENT ALONG RAINBANDS ASSOCIATED WITH HURRICANE GUSTAV.
LAT...LON 2469 8117 2472 8117 2476 8100 2480 8095
2480 8088 2477 8088 2475 8090 2470 8105
2467 8108
TIME...MOT...LOC 2355Z 103DEG 24KT 2474 8101
$$
11The office that day
Everything else NWS Key West, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 30, 12:11 AM EDT | Tropical Storm Warning | KEY | 41 hr | |
| Aug 30, 3:13 AM EDT | Special Marine Warning | KEY | 62 min | |
| Aug 30, 5:39 AM EDT | Special Marine Warning | KEY | 51 min | |
| Aug 30, 6:28 AM EDT | Special Marine Warning | KEY | 47 min | |
| Aug 30, 9:34 AM EDT | Special Marine Warning | KEY | 26 min | |
| Aug 30, 10:04 AM EDT | Special Marine Warning | KEY | 26 min | |
| Aug 30, 10:45 AM EDT | Special Marine Warning | KEY | 49 min | |
| Aug 30, 11:42 AM EDT | Special Marine Warning | KEY | 78 min | |
| Aug 30, 12:37 PM EDT | Tropical Storm Warning | KEY | Monroe | 26 hr |
| Aug 30, 1:17 PM EDT | Special Marine Warning | KEY | 118 min | |
| Aug 30, 2:24 PM EDT | Tornado Warning | KEY | Monroe | 21 min |
| Aug 30, 3:22 PM EDT | Special Marine Warning | KEY | 113 min | |
| Aug 30, 5:19 PM EDT | Special Marine Warning | KEY | 116 min | |
| Aug 30, 7:17 PM EDT | Special Marine Warning | KEY | 118 min | |
| Aug 30, 7:31 PM EDT | Tornado Warning | KEY | Monroe | 29 min |
Nearby
Tornado Warnings in Florida, 2008Every tornado warning in 2008Tornadoes in 2008
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.