Alert archive / Alabama / Flash Flood Warnings in 2009

Flash Flood Warning 6, NWS Huntsville, AL

February 27, 2009Cullman County, Alabama

NWS Huntsville, AL issued this flash flood warning at Feb 27, 2009, 3:26 PM CST for Cullman County, Alabama. 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: Feb 27, 2009, 3:26 PM CST (21:26 UTC)
Expired: Feb 27, 2009, 6:15 PM CST
In force: 3 hr
Issued by: NWS Huntsville, AL
Area: Storm-based polygon
Flood severity: None

County Cullman County, AL

The radar

The Birmingham radar (KBMX), 107 km from the middle of the area, began a volume at 21:26 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

Birmingham, AL (KBMX), launched 12:00Z, 9.4 hours before the alert went out and 106 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 622 m above ground
0-6 km bulk shear: 59 kt
0-1 km storm-relative helicity: 398 m²/s²
0-3 km storm-relative helicity: 400 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 Feb 27, 2:16 PM CST, 1 hour 10 minutes earlier.

Area forecast discussion, Feb 27, 2:16 PM CST, 1 hour 10 minutes before

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Hazardous weather outlook, Feb 27, 1:06 PM CST, 2 hours 20 minutes before

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE HUNTSVILLE AL
106 PM CST FRI FEB 27 2009

ALZ001>010-016-TNZ076-096-097-280300-
LAUDERDALE-COLBERT-FRANKLIN AL-LAWRENCE-LIMESTONE-MADISON-MORGAN-
MARSHALL-JACKSON-DEKALB-CULLMAN-MOORE-LINCOLN-FRANKLIN TN-
106 PM CST FRI FEB 27 2009

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

.DAY ONE...TONIGHT...

AN AREA OF SHOWERS AND THUNDERSTORMS WILL MOVE INTO THE AREA THIS
EVENING AHEAD OF A STRENGTHENING LOW PRESSURE SYSTEM. STORM TOTAL
RAINFALL OF 2 TO 4 INCHES WILL BE POSSIBLE...WITH ISOLATED AMOUNTS
UP TO 4 INCHES ESPECIALLY OVER AREAS SOUTH OF THE TENNESSEE RIVER.
THIS MAY PRODUCE LOCALIZED FLASH FLOODING.

STRONG TO SEVERE THUNDERSTORMS ARE POSSIBLE AS A WARM FRONT LIFTS
NORTH THIS EVENING INTO TONIGHT. THE PRIMARY THREATS WITH THESE
STORMS WILL BE DAMAGING WINDS AND HAIL.

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

COLDER AIR WILL MOVE ACROSS THE AREA SATURDAY AND SATURDAY NIGHT
AHEAD OF A FAIRLY INTENSE UPPER LEVEL LOW PRESSURE SYSTEM. AS THIS
OCCURS...SNOW IS LIKELY...MAINLY AFTER MIDNIGHT SATURDAY NIGHT.
BRISK NORTHERLY WINDS OF 20 TO 30 MPH WILL ACCOMPANY THE SNOW WHICH
MAY REDUCE VISIBILITIES SATURDAY NIGHT.

SNOW ACCUMULATIONS OF 1 INCH OR LESS ARE POSSIBLE...ESPECIALLY OVER
THE HIGHER ELEVATIONS.

.SPOTTER CALL TO ACTION STATEMENT...

ACTIVATION OF STORM SPOTTERS AND EMERGENCY MANAGEMENT PERSONNEL IS
POSSIBLE TONIGHT.

SL

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 27, 10:17 AM CST	Flash Flood Watch	HUN	Cullman, DeKalb, Marshall	20 hr

Nearby

Flash Flood Warnings in Alabama, 2009 Every flash flood warning in 2009

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.