Alert archive / Florida / Tornado Warnings in 2011
Tornado Warning 39, NWS Tallahassee, FL
NWS Tallahassee, FL issued this tornado warning at Sep 4, 2011, 10:20 AM CDT for Bay County, Washington County, Florida. It was in force for 40 min. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Sep 4, 2011, 10:20 AM CDT (15:20 UTC)
- Expired
- Sep 4, 2011, 11:00 AM CDT
- In force
- 40 min
- Issued by
- NWS Tallahassee, FL
- Area
- Storm-based polygon
Counties Bay County, FL, Washington County, FL
The radar
The Eglin Afb radar (KEVX), 22 km from the middle of the area, began a volume at 15:21 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 4, 10:35 AM CDT | TORNADO | Crystal Lake, FL | PUBLIC REPORTED A TORNADO NEAR HWY 20 IN CRYSTAL LAKE. TORNADO DISSIPATED AS IT CROSSED THE HIGHWAY. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Sep 4, 5:05 AM CDT | Tornado Watch | SPC | 11 hr |
The nearest sounding before it
Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 3.3 hours before the alert went out and 135 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
- 1223 J/kg
- Mixed-layer CIN
- -10 J/kg
- Mixed-layer LCL
- 468 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
- 179 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 4.3
The text
As transmitted, in the capitals the NWS used until 2016.
265 WFUS52 KTAE 041520 TORTAE FLC005-133-041600- /O.NEW.KTAE.TO.W.0039.110904T1520Z-110904T1600Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE TALLAHASSEE FL 1020 AM CDT SUN SEP 4 2011 THE NATIONAL WEATHER SERVICE IN TALLAHASSEE HAS ISSUED A * TORNADO WARNING FOR... NORTH CENTRAL BAY COUNTY IN THE PANHANDLE OF FLORIDA... CENTRAL WASHINGTON COUNTY IN THE PANHANDLE OF FLORIDA... * UNTIL 1100 AM CDT * AT 1016 AM CDT...A DEVELOPING TORNADO HAS BEEN DETECTED BY THE NATIONAL WEATHER SERVICE NEAR CRYSTAL LAKE...OR NEAR VICKSBURG... MOVING NORTH AT 25 MPH. * OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO CRYSTAL LAKE...RIVERSIDE...GREENHEAD...HOLMES VALLEY...SPRING HOLLOW AND SMYRNA PRECAUTIONARY/PREPAREDNESS ACTIONS... TAKE COVER NOW! LEAVE MOBILE HOMES AND VEHICLES FOR SAFER STRUCTURES. MOVE TO A HALLWAY OR CLOSET ON THE LOWEST FLOOR AWAY FROM WINDOWS AND OUTSIDE WALLS. A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. && LAT...LON 3062 8582 3062 8554 3035 8560 3034 8572 TIME...MOT...LOC 1520Z 177DEG 21KT 3039 8566 $$ 14-MROCZKA
1 follow-up statement
240 WWUS52 KTAE 041536 SVSTAE SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE TALLAHASSEE FL 1136 AM EDT SUN SEP 4 2011 FLC005-041545- /O.CAN.KTAE.TO.W.0039.000000T0000Z-110904T1600Z/ BAY FL- 1036 AM CDT SUN SEP 4 2011 ...THE TORNADO WARNING FOR NORTH CENTRAL BAY COUNTY IS CANCELLED... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATES THE THE CIRCULATION THAT PROMPTED THE WARNING HAS MOVED NORTH OF THE COUNTY. THEREFORE THE TORNADO WARNING FOR NORTH CENTRAL BAY COUNTY HAS BEEN CANCELLED. A TORNADO WATCH REMAINS IN EFFECT UNTIL 400 PM CDT SUNDAY AFTERNOON FOR SOUTHEAST ALABAMA AND CENTRAL FLORIDA. LAT...LON 3062 8554 3044 8558 3044 8576 3062 8582 TIME...MOT...LOC 1535Z 177DEG 21KT 3048 8567 $$ FLC133-041600- /O.CON.KTAE.TO.W.0039.000000T0000Z-110904T1600Z/ WASHINGTON FL- 1036 AM CDT SUN SEP 4 2011 ...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1100 AM CDT FOR CENTRAL WASHINGTON COUNTY... AT 1030 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A POSSIBLE TORNADO. THIS TORNADO WAS LOCATED NEAR CRYSTAL LAKE...MOVING NORTH AT 25 MPH. OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO GREENHEAD...HOLMES VALLEY...SPRING HOLLOW...SMYRNA AND SYLVANIA PRECAUTIONARY/PREPAREDNESS ACTIONS... A TORNADO WATCH REMAINS IN EFFECT UNTIL 400 PM CDT SUNDAY AFTERNOON FOR SOUTHEAST ALABAMA AND CENTRAL FLORIDA. && LAT...LON 3062 8554 3044 8558 3044 8576 3062 8582 TIME...MOT...LOC 1535Z 177DEG 21KT 3048 8567 $$ 14-MROCZKA
The office that day
Everything else NWS Tallahassee, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 3, 9:47 PM CDT | Special Marine Warning | TAE | 58 min | |
| Sep 4, 3:13 AM CDT | Flash Flood Watch | TAE | Bay, Calhoun, Franklin, Gadsden, Gulf, Holmes and 5 more | 35 hr |
| Sep 4, 5:11 AM CDT | Severe Thunderstorm Warning | TAE | Walton | 49 min |
| Sep 4, 5:45 AM CDT | Special Weather Statement | TAE | Washington | 30 min |
| Sep 4, 8:13 AM CDT | Special Marine Warning | TAE | 32 min | |
| Sep 4, 8:40 AM CDT | Special Marine Warning | TAE | 50 min | |
| Sep 4, 9:59 AM CDT | Tornado Warning | TAE | Walton | 31 min |
| Sep 4, 11:40 AM CDT | Tornado Warning | TAE | Washington | 25 min |
| Sep 4, 1:37 PM CDT | Special Marine Warning | TAE | 38 min | |
| Sep 4, 2:07 PM CDT | Special Weather Statement | TAE | Wakulla | 23 min |
| Sep 4, 2:13 PM CDT | Special Marine Warning | TAE | 47 min | |
| Sep 4, 2:27 PM CDT | Special Weather Statement | TAE | Franklin | 48 min |
| Sep 4, 2:32 PM CDT | Coastal Flood Watch | TAE | Bay, Dixie, Franklin, Gulf, Jefferson, Taylor and 2 more | 25 hr |
| Sep 4, 2:36 PM CDT | Special Weather Statement | TAE | Gadsden, Leon, Wakulla | 39 min |
| Sep 4, 2:43 PM CDT | Special Marine Warning | TAE | 47 min | |
| Sep 4, 3:12 PM CDT | Special Weather Statement | TAE | Jefferson | 48 min |
| Sep 4, 3:49 PM CDT | Special Marine Warning | TAE | 41 min | |
| Sep 4, 4:03 PM CDT | Tornado Warning | TAE | Taylor | 27 min |
| Sep 4, 4:29 PM CDT | Special Marine Warning | TAE | 61 min | |
| Sep 4, 4:46 PM CDT | Special Marine Warning | TAE | 44 min | |
| Sep 4, 4:58 PM CDT | Special Marine Warning | TAE | 47 min | |
| Sep 4, 6:01 PM CDT | Special Marine Warning | TAE | 44 min | |
| Sep 4, 6:44 PM CDT | Special Marine Warning | TAE | 61 min | |
| Sep 4, 6:48 PM CDT | Special Marine Warning | TAE | 27 min |
Nearby
Tornado Warnings in Florida, 2011Every tornado warning in 2011Tornadoes in 2011
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.