Alert archive / Alabama / Severe Thunderstorm Warnings in 2004
Severe Thunderstorm Warning 106, NWS Huntsville, AL
NWS Huntsville, AL issued this severe thunderstorm warning at Aug 20, 2004, 1:56 PM CDT for Colbert County, Franklin County, Alabama. It was in force for 49 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Aug 20, 2004, 1:56 PM CDT (18:56 UTC)
- Expired
- Aug 20, 2004, 2:45 PM CDT
- In force
- 49 min
- Issued by
- NWS Huntsville, AL
- Area
- Counties, with a storm outline in the text
Counties Colbert County, AL, Franklin County, AL
The radar
The Columbus AFB radar (KGWX), 88 km from the middle of the area, began a volume at 18:53 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.
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 20, 1:35 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Birmingham, AL (KBMX), launched 12:00Z, 6.9 hours before the alert went out and 182 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
- 591 J/kg
- Mixed-layer CIN
- -67 J/kg
- Mixed-layer LCL
- 915 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 15 m²/s²
- 0-3 km storm-relative helicity
- 46 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Huntsville, AL wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 20, 10:48 AM CDT, 3 hours 8 minutes earlier.
Area forecast discussion, Aug 20, 10:48 AM CDT, 3 hours 8 minutes before
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</html>Hazardous weather outlook, Aug 20, 12:47 PM CDT, 1 hour 9 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE HUNTSVILLE AL 1247 PM CDT FRI AUG 20 2004 ALZ001>010-016-TNZ076-096-097-210230- COLBERT-CULLMAN-DE KALB-FRANKLIN AL-FRANKLIN TN-JACKSON-LAUDERDALE- LAWRENCE-LIMESTONE-LINCOLN-MADISON-MARSHALL-MOORE-MORGAN- 1247 PM CDT FRI AUG 20 2004 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH ALABAMA AND PARTS OF SOUTHERN MIDDLE TENNESSEE. .DAY ONE...(TODAY AND TONIGHT)... ISOLATED SEVERE THUNDERSTORMS CAPABLE OF DAMAGING WINDS ARE POSSIBLE THIS AFTERNOON AND EARLY EVENING. SCATTERED THUNDERSTORMS WILL RAPIDLY DEVELOP AND BECOME MORE WIDESPREAD...FOLLOWED BY A MORE SOLID BAND OF STRONG THUNDERSTORMS SPREADING SOUTHWEST TO NORTHEAST ACROSS NORTH ALABAMA INTO SOUTHERN MIDDLE TENNESSEE. THIS BAND WILL MOVE ACROSS THE AREA FROM 2 PM TO 6 PM. .DAYS TWO THROUGH SEVEN...(SATURDAY THROUGH THURSDAY)... THE PROBABILITY OF WIDESPREAD HAZARDOUS WEATHER IS LOW. THE THREAT OF RAIN WILL CONTINUE INTO SUNDAY AS THE FRONT IS EXPECTED TO STALL OUT ACROSS NORTH ALABAMA. THE FRONT IS EXPECTED TO DISSIPATE BY MONDAY...WITH DRY WEATHER EXPECTED TO RETURN FOR THE BEGINNING OF NEXT WEEK. .SPOTTER CALL TO ACTION STATEMENT... ACTIVATION OF STORM SPOTTERS AND EMERGENCY MANAGEMENT PERSONNEL IS POSSIBLE. KULA
In the hours before
Special weather statement, Aug 20, 1:36 PM CDT, 20 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE HUNTSVILLE AL 136 PM CDT FRI AUG 20 2004 ALZ001>003-201930- COLBERT-FRANKLIN AL-LAUDERDALE- 136 PM CDT FRI AUG 20 2004 ...SIGNIFICANT WEATHER ALERT FOR STRONG THUNDERSTORMS MOVING ACROSS NORTHWEST ALABAMA... STRONG THUNDERSTORMS WILL MOVE ACROSS NORTHWEST ALABAMA THIS AFTERNOON. STRONG WIND GUSTS TO 50 MPH...PEA SIZE HAIL AND SIGNIFICANT CLOUD TO GROUND LIGHTNING WILL BE POSSIBLE WITH THESE STORMS THROUGH 230 PM. LOCALLY HEAVY DOWNPOURS WITH RAINFALL AMOUNTS FROM ONE TO TWO INCHES IN A VERY SHORT PERIOD OF TIME WILL ALSO BE POSSIBLE. PERSONS IN THESE AREAS SHOULD TAKE SHELTER UNTIL THE STORM PASSES. MOTORISTS SHOULD BE ALERT FOR PONDING OF WATER ON AREA ROADWAYS. MR
The office that day
Everything else NWS Huntsville, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 20, 2:48 PM CDT | Severe Thunderstorm Warning | HUN | Colbert, Lauderdale | 42 min |
| Aug 20, 3:08 PM CDT | Tornado Warning | HUN | Jackson | 37 min |
| Aug 20, 3:13 PM CDT | Severe Thunderstorm Warning | HUN | Madison | 32 min |
| Aug 20, 3:28 PM CDT | Tornado Warning | HUN | Jackson | 32 min |
| Aug 20, 4:03 PM CDT | Severe Thunderstorm Warning | HUN | Jackson | 42 min |
| Aug 20, 4:14 PM CDT | Tornado Warning | HUN | Jackson | 31 min |
| Aug 20, 4:45 PM CDT | Severe Thunderstorm Warning | HUN | DeKalb, Jackson | 45 min |
| Aug 20, 3:23 PM CDT | Severe Thunderstorm Warning | HUN | Lincoln, Moore | 27 min |
| Aug 20, 3:36 PM CDT | Tornado Warning | HUN | Moore | 44 min |
Nearby
Severe Thunderstorm Warnings in Alabama, 2004Every severe thunderstorm warning in 2004
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.