Alert archive / Alabama / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 41, NWS Huntsville, AL

May 10, 2007Morgan County, Alabama

NWS Huntsville, AL issued this severe thunderstorm warning at May 10, 2007, 6:15 PM CDT for Morgan County, Alabama. It was in force for 30 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
May 10, 2007, 6:15 PM CDT (23:15 UTC)
Expired
May 10, 2007, 6:45 PM CDT
In force
30 min
Issued by
NWS Huntsville, AL
Area
Counties, with a storm outline in the text

County Morgan County, AL

The radar

The Northeast Alabama radar (KHTX), 88 km from the middle of the area, began a volume at 23:15 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 12:00Z, 11.3 hours before the alert went out and 142 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-pSkew-T log-p diagram, Birmingham, AL at 12:00Z on 2007-05-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Birmingham, AL at 12:00Z on 2007-05-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 26 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1305 m above ground
0-6 km bulk shear
13 kt
0-1 km storm-relative helicity
26 m²/s²
0-3 km storm-relative helicity
59 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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 May 10, 2:15 PM CDT, 4 hours earlier.

Area forecast discussion, May 10, 2:15 PM CDT, 4 hours before
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Hazardous weather outlook, May 10, 1:00 PM CDT, 5 hours 15 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE HUNTSVILLE AL
100 PM CDT THU MAY 10 2007

ALZ001>010-016-TNZ076-096-097-111000-
LAUDERDALE-COLBERT-FRANKLIN AL-LAWRENCE-LIMESTONE-MADISON-MORGAN-
MARSHALL-JACKSON-DE KALB-CULLMAN-MOORE-LINCOLN-FRANKLIN TN-
100 PM CDT THU MAY 10 2007

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

.DAY ONE...THROUGH TONIGHT...

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

THE COMBINATION OF A WEATHER DISTURBANCE MOVING TOWARD THE
SOUTHEASTERN STATES AND AFTERNOON HEATING WILL CAUSE ISOLATED TO
SCATTERED SHOWERS AND THUNDERSTORMS TO DEVELOP THIS AFTERNOON ACROSS
THE REGION. SOME OF THESE THUNDERSTORMS COULD PRODUCE
MICROBURSTS...RESULTING IN BRIEF WIND GUSTS TO 50 MPH...HEAVY
DOWNPOURS AND SMALL HAIL.

CONDITIONS ACROSS NORTHWEST ALABAMA WILL BE MORE FAVORABLE FOR THIS
STRONG THUNDERSTORM ACTIVITY. MOST OF THE SHOWER AND THUNDERSTORM
ACTIVITY SHOULD DISSIPATE SHORTLY AFTER SUNSET.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY...

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

SCATTERED AFTERNOON AND EVENING SHOWERS AND THUNDERSTORMS ARE
POSSIBLE ON FRIDAY AND SATURDAY AS A WEAK COLD FRONT MOVES INTO
THE TENNESSEE VALLEY. THESE THUNDERSTORMS MAY ALSO BE CAPABLE OF
PRODUCING MICROBURSTS.

ANOTHER WEAK FRONT IS EXPECTED TO CAUSE SHOWERS AND THUNDERSTORMS
TO RETURN TO THE AREA BY THE MIDDLE OF NEXT WEEK.

.SPOTTER CALL TO ACTION STATEMENT...

ACTIVATION OF STORM SPOTTERS AND EMERGENCY MANAGEMENT PERSONNEL
IS NOT ANTICIPATED AT THIS TIME.

JE

In the hours before

Local storm report, May 10, 2:39 PM CDT, 3 hours 36 minutes before
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Special weather statement, May 10, 3:45 PM CDT, 2 hours 30 minutes before
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Special weather statement, May 10, 4:14 PM CDT, 2 hours 1 minute before
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Special weather statement, May 10, 4:39 PM CDT, 1 hour 36 minutes before
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Special weather statement, May 10, 5:59 PM CDT, 16 minutes before
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Special weather statement, May 10, 6:01 PM CDT, 14 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
May 10, 1:37 PM CDTSevere Thunderstorm WarningHUNFranklin14 min
May 10, 2:15 PM CDTSevere Thunderstorm WarningHUNColbert, Lawrence16 min

Nearby

Severe Thunderstorm Warnings in Alabama, 2007Every severe thunderstorm warning in 2007

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.