Alert archive / Tennessee / Flash Flood Warnings in 2013

Flash Flood Warning 48, NWS Huntsville, AL

December 22, 2013Madison County, Alabama; Franklin County, Lincoln County, Moore County, Tennessee

NWS Huntsville, AL issued this flash flood warning at Dec 22, 2013, 1:22 AM CST for Madison County, Alabama; Franklin County, Lincoln County, Moore County, Tennessee. It was in force for 3 hr. 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 22, 2013, 1:22 AM CST (07:22 UTC)
Expired: Dec 22, 2013, 4:15 AM CST
In force: 3 hr
Issued by: NWS Huntsville, AL
Area: Storm-based polygon
Flood severity: None

Counties Madison County, AL, Franklin County, TN, Lincoln County, TN, Moore County, TN

The radar

The Northeast Alabama radar (KHTX), 33 km from the middle of the area, began a volume at 07:26 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

Nashville Metro, TN (KBNA), launched 00:00Z, 7.4 hours before the alert went out and 118 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: 417 J/kg
Mixed-layer CIN: -13 J/kg
Mixed-layer LCL: 603 m above ground
0-6 km bulk shear: 78 kt
0-1 km storm-relative helicity: 587 m²/s²
0-3 km storm-relative helicity: 694 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 6.9

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 Dec 21, 11:24 PM CST, 1 hour 58 minutes earlier.

Area forecast discussion, Dec 21, 11:24 PM CST, 1 hour 58 minutes before

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Hazardous weather outlook, Dec 21, 8:42 PM CST, 4 hours 40 minutes before

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE HUNTSVILLE AL
842 PM CST SAT DEC 21 2013

ALZ001>010-016-TNZ076-096-097-220900-
LAUDERDALE-COLBERT-FRANKLIN AL-LAWRENCE-LIMESTONE-MADISON-MORGAN-
MARSHALL-JACKSON-DEKALB-CULLMAN-MOORE-LINCOLN-FRANKLIN TN-
842 PM CST SAT DEC 21 2013

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

.DAY ONE...TONIGHT...

A SQUALL LINE WILL MOVE EAST ACROSS NORTH ALABAMA AND SOUTHERN
TENNESSEE OVERNIGHT. THE STORMS WILL PRODUCE DAMAGING WINDS IN EXCESS
OF 60 MPH. SHORT LIVED TORNADOES REMAIN POSSIBLE ALONG THIS LINE. A
TORNADO WATCH IS IN EFFECT UNTIL 2 AM.

THE LINE SHOULD APPROACH THE I-65 CORRIDOR IN NORTH ALABAMA AND
SOUTHERN MIDDLE TENNESSEE BETWEEN 11 PM AND 1 AM AND EXIT NORTHEAST
ALABAMA BY 2 TO 3 AM.

LOCALLY HEAVY RAINFALL OF 1 TO 2 INCHES WILL ALSO OCCUR WHICH COULD
LEAD TO PONDING OF WATER IN POOR DRAINAGE LOCATIONS.

A WIND ADVISORY IS ALSO IN EFFECT UNTIL 3 AM. SOUTH WINDS OF 25 TO 30
MPH WITH GUSTS OVER 40 MPH WILL CONTINUE AHEAD OF THE LINE OF
THUNDERSTORMS.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY...

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER CALL TO ACTION STATEMENT...

ACTIVATION OF STORM SPOTTERS AND EMERGENCY MANAGEMENT PERSONNEL
IS ONGOING.

In the hours before

Special weather statement, Dec 21, 11:56 PM CST, 1 hour 26 minutes before

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Local storm report, Dec 22, 12:13 AM CST, 1 hour 9 minutes before

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Local storm report, Dec 22, 12:33 AM CST, 49 minutes before

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Special weather statement, Dec 22, 12:36 AM CST, 46 minutes before

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Local storm report, Dec 22, 12:45 AM CST, 37 minutes before

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Local storm report, Dec 22, 1:10 AM CST, 12 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 21, 8:08 PM CST	Severe Thunderstorm Warning	HUN	Colbert, Franklin, Lauderdale	52 min
Dec 21, 8:55 PM CST	Severe Thunderstorm Warning	HUN	Colbert, Franklin, Lauderdale	35 min
Dec 21, 9:29 PM CST	Severe Thunderstorm Warning	HUN	Colbert, Franklin, Lauderdale	46 min
Dec 21, 10:08 PM CST	Special Weather Statement	HUN	Lawrence	37 min
Dec 21, 10:40 PM CST	Special Weather Statement	HUN	Lawrence, Limestone	50 min
Dec 21, 11:13 PM CST	Special Weather Statement	HUN	Limestone, Morgan	47 min
Dec 21, 11:56 PM CST	Special Weather Statement	HUN	Madison, Morgan	49 min
Dec 22, 12:36 AM CST	Special Weather Statement	HUN	Madison, Morgan	39 min
Dec 22, 1:44 AM CST	Special Weather Statement	HUN	DeKalb, Jackson, Marshall	46 min
Dec 22, 2:32 AM CST	Special Weather Statement	HUN	DeKalb	43 min
Dec 22, 4:15 AM CST	Areal Flood Warning	HUN	Madison	3 hr
Dec 22, 8:42 AM CST	River Flood Warning	HUN	Madison	22 hr
Dec 21, 10:42 PM CST	Special Weather Statement	HUN	Lincoln	48 min
Dec 21, 11:22 PM CST	Special Weather Statement	HUN	Lincoln, Moore	38 min

Nearby

Flash Flood Warnings in Tennessee, 2013 Flash Flood Warnings in Alabama, 2013 Every flash flood warning in 2013

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.