Alert archive / Alabama / Flash Flood Warnings in 2010

Flash Flood Warning 34, NWS Huntsville, AL

June 25, 2010Franklin County, Alabama

NWS Huntsville, AL issued this flash flood warning at Jun 25, 2010, 3:57 PM CDT for Franklin County, Alabama. It was in force for 80 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: Jun 25, 2010, 3:57 PM CDT (20:57 UTC)
Expired: Jun 25, 2010, 5:17 PM CDT
In force: 80 min
Issued by: NWS Huntsville, AL
Area: Storm-based polygon
Flood severity: None

County Franklin County, AL

The radar

The Columbus AFB radar (KGWX), 75 km from the middle of the area, began a volume at 20:57 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, 9.0 hours before the alert went out and 171 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: 1895 J/kg
Mixed-layer CIN: -27 J/kg
Mixed-layer LCL: 962 m above ground
0-6 km bulk shear: 2 kt
0-1 km storm-relative helicity: -32 m²/s²
0-3 km storm-relative helicity: -32 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 flash flood 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 flash flood warning went out at Jun 25, 2:44 PM CDT, 1 hour 13 minutes earlier.

Area forecast discussion, Jun 25, 2:44 PM CDT, 1 hour 13 minutes before

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Hazardous weather outlook, Jun 25, 10:58 AM CDT, 4 hours 59 minutes before

HAZARDOUS WEATHER OUTLOOK...RETRANSMITTED
NATIONAL WEATHER SERVICE HUNTSVILLE AL
1058 AM CDT FRI JUN 25 2010

ALZ001>010-016-TNZ076-096-097-260300-
LAUDERDALE-COLBERT-FRANKLIN AL-LAWRENCE-LIMESTONE-MADISON-MORGAN-
MARSHALL-JACKSON-DEKALB-CULLMAN-MOORE-LINCOLN-FRANKLIN TN-
1058 AM CDT FRI JUN 25 2010

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

.DAY ONE...THIS AFTERNOON AND TONIGHT...

A WEAK FRONTAL BOUNDARY STRETCHED ACROSS THE TENNESSEE
VALLEY...COMBINED WITH A MOIST AND UNSTABLE AIRMASS...WILL RESULT
IN SCATTERED AFTERNOON AND EVENING THUNDERSTORMS. DUE TO THEIR SLOW
MOVEMENT...LOCALLY HEAVY RAINFALL IS LIKELY WITH ANY STORMS
TODAY. IN ADDITION...A FEW STORMS WILL BE CAPABLE OF PRODUCING
DAMAGING WIND GUSTS.

HEAT INDICES WILL ALSO APPROACH 100 TO 105 DEGREE RANGE ACROSS THE
TENNESSEE VALLEY THROUGH LATE AFTERNOON. CAUTION IS ADVISED WHEN
CONDUCTING OUTDOOR ACTIVITIES THIS AFTERNOON.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY...

SCATTERED THUNDERSTORMS ARE POSSIBLE THROUGH TUESDAY AS A WEAK FRONT
LINGERS ACROSS THE REGION. THE BETTER CHANCE FOR THUNDERSTORMS WILL
BE ON MONDAY AS A STRONGER COLD FRONT PUSHES SOUTHWARD THROUGH THE
AREA. LOCALLY HEAVY RAINFALL AND GUSTY WINDS REMAIN POSSIBLE WITH
THE STRONGER STORMS.

AFTERNOON HEAT INDEX VALUES BETWEEN 100 AND 105 DEGREES ALSO REMAIN
POSSIBLE THROUGH EARLY NEXT WEEK. CAUTION IS STRONGLY ADVISED WHEN
CONDUCTING OUTDOOR ACTIVITIES THIS WEEKEND AND EARLY NEXT WEEK.

.SPOTTER CALL TO ACTION STATEMENT...

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

In the hours before

Special weather statement, Jun 25, 2:42 PM CDT, 1 hour 15 minutes before

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Special weather statement, Jun 25, 3:10 PM CDT, 47 minutes before

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Local storm report, Jun 25, 3:24 PM CDT, 33 minutes before

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Special weather statement, Jun 25, 3:30 PM CDT, 27 minutes before

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Special weather statement, Jun 25, 3:30 PM CDT, 27 minutes before

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Local storm report, Jun 25, 3:32 PM CDT, 25 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
Jun 25, 11:20 AM CDT	Special Weather Statement	HUN	Lawrence	40 min
Jun 25, 12:26 PM CDT	Special Weather Statement	HUN	Morgan	34 min
Jun 25, 12:50 PM CDT	Special Weather Statement	HUN	Limestone	25 min
Jun 25, 1:01 PM CDT	Special Weather Statement	HUN	Morgan	29 min
Jun 25, 1:07 PM CDT	Severe Thunderstorm Warning	HUN	Cullman	23 min
Jun 25, 1:18 PM CDT	Special Weather Statement	HUN	Madison	42 min
Jun 25, 1:29 PM CDT	Special Weather Statement	HUN	Lauderdale	46 min
Jun 25, 1:33 PM CDT	Special Weather Statement	HUN	Cullman	27 min
Jun 25, 1:48 PM CDT	Severe Thunderstorm Warning	HUN	Madison	28 min
Jun 25, 2:04 PM CDT	Special Weather Statement	HUN	Jackson	41 min
Jun 25, 2:13 PM CDT	Severe Thunderstorm Warning	HUN	Jackson	32 min
Jun 25, 2:27 PM CDT	Flash Flood Warning	HUN	Jackson	51 min
Jun 25, 2:42 PM CDT	Special Weather Statement	HUN	Madison	48 min
Jun 25, 3:10 PM CDT	Special Weather Statement	HUN	DeKalb	50 min
Jun 25, 3:12 PM CDT	Severe Thunderstorm Warning	HUN	DeKalb	48 min
Jun 25, 4:02 PM CDT	Special Weather Statement	HUN	Colbert, Lauderdale	58 min
Jun 25, 4:11 PM CDT	Severe Thunderstorm Warning	HUN	Colbert, Lauderdale	49 min
Jun 25, 4:44 PM CDT	Flash Flood Warning	HUN	Colbert	2 hr
Jun 25, 5:05 PM CDT	Special Weather Statement	HUN	Lauderdale	40 min
Jun 25, 1:53 PM CDT	Special Weather Statement	HUN	Lincoln	37 min
Jun 25, 1:59 PM CDT	Severe Thunderstorm Warning	HUN	Lincoln	46 min
Jun 25, 3:30 PM CDT	Special Weather Statement	HUN	Franklin	60 min

Nearby

Flash Flood Warnings in Alabama, 2010 Every flash flood warning in 2010

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.