Alert archive / Alabama / Severe Thunderstorm Warnings in 2005

Severe Thunderstorm Warning 217, NWS Huntsville, AL

December 4, 2005DeKalb County, Alabama

NWS Huntsville, AL issued this severe thunderstorm warning at Dec 4, 2005, 2:18 AM CST for DeKalb County, Alabama. It was in force for 42 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: Dec 4, 2005, 2:18 AM CST (08:18 UTC)
Expired: Dec 4, 2005, 3:00 AM CST
In force: 42 min
Issued by: NWS Huntsville, AL
Area: Counties, with a storm outline in the text

County DeKalb County, AL

The radar

The Northeast Alabama radar (KHTX), 58 km from the middle of the area, began a volume at 08:17 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, 8.3 hours before the alert went out and 168 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 40 J/kg
Mixed-layer CIN: -53 J/kg
Mixed-layer LCL: 847 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: 637 m²/s²
0-3 km storm-relative helicity: 916 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.2

Open this sounding in Storm Lab

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 Dec 4, 2:10 AM CST, 8 minutes earlier.

Area forecast discussion, Dec 4, 2:10 AM CST, 8 minutes before

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Hazardous weather outlook, Dec 3, 9:30 PM CST, 4 hours 48 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE HUNTSVILLE AL
930 PM CST SAT DEC 3 2005

ALZ001>010-016-TNZ076-096-097-041100-
COLBERT-CULLMAN-DE KALB-FRANKLIN AL-FRANKLIN TN-JACKSON-LAUDERDALE-
LAWRENCE-LIMESTONE-LINCOLN-MADISON-MARSHALL-MOORE-MORGAN-
930 PM CST SAT DEC 3 2005

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH ALABAMA AND PARTS OF
SOUTHERN MIDDLE TENNESSEE.

.DAY ONE...(OVERNIGHT)...

...RISK OF ISOLATED SEVERE STORMS FROM 10 PM TO 4 AM...

SCATTERED THUNDERSTORMS WERE DEVELOPING RAPIDLY ACROSS NORTHERN
MISSISSIPPI...AND WILL MOVE INTO NORTHWEST ALABAMA BETWEEN 10 PM AND
MIDNIGHT. A LINE OF THUNDERSTORMS WILL ALSO EVOLVE ALONG AN
APPROACHING COLD FRONT...MOVING THROUGH FROM MIDNIGHT TO 4 AM.

THE MAIN THREATS FROM THESE STORMS WILL BE LARGE HAIL UP TO QUARTER
SIZED...AND DAMAGING WINDS UP TO 70 MPH. AN ISOLATED BRIEF TORNADO IS
POSSIBLE IN EXTREME NORTHWEST ALABAMA...BUT THIS IS A LOW RISK.

.DAYS TWO THROUGH SEVEN...(SUNDAY THROUGH FRIDAY)...

THE PROBABILITY OF WIDESPREAD HAZARDOUS WEATHER IS LOW.

THE COLD FRONT WILL MOVE THROUGH THE AREA ON SUNDAY. ANOTHER LOW
PRESSURE CENTER WILL MOVE ACROSS ALABAMA ON SUNDAY NIGHT...KEEPING
RAIN CHANCES IN THROUGH THE END OF THE WEEKEND.

THE COVERAGE OF RAIN WILL DIMINISH LATE SUNDAY NIGHT AND END AS
SHOWERS ON MONDAY.

.SPOTTER CALL TO ACTION STATEMENT...

ACTIVATION OF STORM SPOTTERS AND EMERGENCY MANAGEMENT PERSONNEL MAY
BE NEEDED OVERNIGHT.

24/KULA

In the hours before

Local storm report, Dec 4, 1:22 AM CST, 56 minutes before

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Local storm report, Dec 4, 1:44 AM CST, 34 minutes before

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Local storm report, Dec 4, 1:53 AM CST, 25 minutes before

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Local storm report, Dec 4, 2:09 AM CST, 9 minutes before

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Special weather statement, Dec 4, 2:13 AM CST, 5 minutes before

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Local storm report, Dec 4, 2:16 AM CST, 2 minutes before

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The office that day

Everything else NWS Huntsville, AL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Dec 4, 12:19 AM CST	Severe Thunderstorm Warning	HUN	Franklin	41 min
Dec 4, 12:42 AM CST	Severe Thunderstorm Warning	HUN	Lawrence	33 min
Dec 4, 1:07 AM CST	Severe Thunderstorm Warning	HUN	Limestone, Morgan	23 min
Dec 4, 1:14 AM CST	Severe Thunderstorm Warning	HUN	Madison	46 min
Dec 4, 1:18 AM CST	Severe Thunderstorm Warning	HUN	Lawrence	27 min
Dec 4, 1:21 AM CST	Severe Thunderstorm Warning	HUN	Cullman	39 min
Dec 4, 1:24 AM CST	Severe Thunderstorm Warning	HUN	Jackson	51 min
Dec 4, 1:31 AM CST	Severe Thunderstorm Warning	HUN	Morgan	29 min
Dec 4, 1:45 AM CST	Severe Thunderstorm Warning	HUN	Marshall	45 min

Nearby

Severe Thunderstorm Warnings in Alabama, 2005 Every 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.