Alert archive / Alabama / Severe Thunderstorm Warnings in 2005
Severe Thunderstorm Warning 79, NWS Huntsville, AL
NWS Huntsville, AL issued this severe thunderstorm warning at Apr 30, 2005, 4:09 AM CDT for DeKalb County, Marshall County, Alabama. It was in force for 37 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
- Apr 30, 2005, 4:09 AM CDT (09:09 UTC)
- Expired
- Apr 30, 2005, 4:46 AM CDT
- In force
- 37 min
- Issued by
- NWS Huntsville, AL
- Area
- Counties, with a storm outline in the text
Counties DeKalb County, AL, Marshall County, AL
The radar
The Northeast Alabama radar (KHTX), 58 km from the middle of the area, began a volume at 09:12 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 nearest sounding before it
Birmingham, AL (KBMX), launched 00:00Z, 9.2 hours before the alert went out and 153 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
- 84 J/kg
- Mixed-layer CIN
- -149 J/kg
- Mixed-layer LCL
- 1501 m above ground
- 0-6 km bulk shear
- 58 kt
- 0-1 km storm-relative helicity
- 130 m²/s²
- 0-3 km storm-relative helicity
- 370 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
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 Apr 30, 2:45 AM CDT, 1 hour 24 minutes earlier.
Area forecast discussion, Apr 30, 2:45 AM CDT, 1 hour 24 minutes before
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</html>Hazardous weather outlook, Apr 29, 11:13 PM CDT, 4 hours 56 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE HUNTSVILLE AL 1113 PM CDT FRI APR 29 2005 ALZ001>010-016-TNZ076-096-097-301000- COLBERT-CULLMAN-DE KALB-FRANKLIN AL-FRANKLIN TN-JACKSON-LAUDERDALE- LAWRENCE-LIMESTONE-LINCOLN-MADISON-MARSHALL-MOORE-MORGAN- 1113 PM CDT FRI APR 29 2005 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH ALABAMA AND PARTS OF SOUTHERN MIDDLE TENNESSEE. .DAY ONE...(OVERNIGHT)... A LOW PRESSURE SYSTEM OVER NORTHERN MISSISSIPPI WILL DRAG A COLD FRONT ACROSS THE TENNESSEE VALLEY OVERNIGHT. THIS WILL PRODUCE A FEW STRONG TO SEVERE THUNDERSTORMS. THE MAIN SEVERE WEATHER THREATS WILL BE LARGE HAIL...DAMAGING WINDS AND HEAVY RAIN. A FEW ISOLATED TORNADOES WILL ALSO BE POSSIBLE...HOWEVER THE TORNADO THREAT WILL BEGIN TO DIMINISH DURING THE EARLY MORNING HOURS. .DAYS TWO THROUGH SEVEN...(SATURDAY THROUGH THURSDAY)... THE PROBABILITY OF WIDESPREAD HAZARDOUS WEATHER IS LOW. THE SHOWER AND THUNDERSTORM ACTIVITY WILL END BY NOON TIME SATURDAY ACROSS THE AREA. OTHERWISE...THE NEXT CHANCE OF SHOWERS AND THUNDERSTORMS WILL BE TUESDAY THROUGH WEDNESDAY OF NEXT WEEK. .SPOTTER CALL TO ACTION STATEMENT... ACTIVATION OF STORM SPOTTERS AND EMERGENCY MANAGEMENT PERSONNEL IS IN EFFECT. SS
In the hours before
Special weather statement, Apr 30, 2:56 AM CDT, 1 hour 13 minutes before
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</html>Local storm report, Apr 30, 3:07 AM CDT, 1 hour 2 minutes before
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</html>Special weather statement, Apr 30, 3:22 AM CDT, 47 minutes before
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</html>Special weather statement, Apr 30, 3:45 AM CDT, 24 minutes before
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</html>Special weather statement, Apr 30, 3:58 AM CDT, 11 minutes before
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</html>Local storm report, Apr 30, 4:06 AM CDT, 3 minutes before
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</html>The office that day
Everything else NWS Huntsville, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 30, 2:09 AM CDT | Severe Thunderstorm Warning | HUN | Cullman, Morgan | 21 min |
| Apr 30, 3:13 AM CDT | Severe Thunderstorm Warning | HUN | Cullman | 47 min |
Nearby
Severe Thunderstorm Warnings in Alabama, 2005Every severe thunderstorm warning in 2005
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.