Alert archive / Alabama / Areal Flood Advisories in 2013

Areal Flood Advisory 21, NWS Birmingham, AL

February 11, 20134 counties in Alabama

NWS Birmingham, AL issued this areal flood advisory at Feb 11, 2013, 3:57 AM CST for 4 counties in Alabama. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued: Feb 11, 2013, 3:57 AM CST (09:57 UTC)
Expired: Feb 11, 2013, 7:00 AM CST
In force: 3 hr
Issued by: NWS Birmingham, AL
Area: Storm-based polygon

Counties Chambers County, AL, Lee County, AL, Macon County, AL, Tallapoosa County, AL

The nearest sounding before it

Birmingham, AL (KBMX), launched 00:00Z, 10.0 hours before the alert went out and 126 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: 14 J/kg
Mixed-layer CIN: -278 J/kg
Mixed-layer LCL: 607 m above ground
0-6 km bulk shear: 62 kt
0-1 km storm-relative helicity: -133 m²/s²
0-3 km storm-relative helicity: 65 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this areal flood advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Birmingham, AL wrote its last area forecast discussion before this areal flood advisory went out at Feb 10, 11:29 PM CST, 4 hours 28 minutes earlier.

Area forecast discussion, Feb 10, 11:29 PM CST, 4 hours 28 minutes before

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Hazardous weather outlook, Feb 10, 9:11 PM CST, 6 hours 46 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BIRMINGHAM AL
911 PM CST SUN FEB 10 2013

ALZ011>015-017>050-120315-
MARION-LAMAR-FAYETTE-WINSTON-WALKER-BLOUNT-ETOWAH-CALHOUN-CHEROKEE-
CLEBURNE-PICKENS-TUSCALOOSA-JEFFERSON-SHELBY-ST. CLAIR-TALLADEGA-
CLAY-RANDOLPH-SUMTER-GREENE-HALE-PERRY-BIBB-CHILTON-COOSA-TALLAPOOSA-
CHAMBERS-MARENGO-DALLAS-AUTAUGA-LOWNDES-ELMORE-MONTGOMERY-MACON-
BULLOCK-LEE-RUSSELL-PIKE-BARBOUR-
911 PM CST SUN FEB 10 2013

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE COUNTIES SERVED BY THE
NATIONAL WEATHER SERVICE OFFICE IN BIRMINGHAM.

.DAY ONE...TONIGHT.

HEAVY RAINFALL ASSOCIATED WITH PERSISTENT SHOWERS AND STORMS COULD LEAD TO
SOME LOCALIZED FLASH FLOOD CONCERNS THROUGH THE OVERNIGHT HOURS.
THE THREAT WILL BE PRIMARILY FOR THE SOUTHERN PORTIONS OF CENTRAL
ALABAMA...WHERE THE MOST RAINFALL HAS ALREADY FALLEN. AREAS ALONG
AND SOUTH OF A LINE FROM LIVINGSTON...TO CLANTON...TO LAFAYETTE
WILL SEE THE BEST CHANCE FOR LOCALIZED FLASH FLOODING.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY.

PERIODS OF HEAVY RAINFALL WILL CONTINUE THROUGH TUESDAY AS THE
FRONTAL BOUNDARY STALLS ACROSS THE SOUTHERN PORTION OF THE STATE.
MANY AREAS WILL RECEIVE ANOTHER FEW INCHES OF RAIN. THIS PROLONGED
PERIOD OF RAINFALL MAY CAUSE ADDITIONAL FLASH FLOODING AND AREAL
FLOODING. AREA RIVERS WILL BECOME ELEVATED AS EARLY AS MONDAY
AFTERNOON...AND PERSIST THROUGH AT LEAST THURSDAY.

.SPOTTER INFORMATION STATEMENT...

ACTIVATION OF STORM SPOTTERS AND EMERGENCY MANAGEMENT MAY BE
NEEDED DUE TO FLOODING TONIGHT THROUGH TUESDAY.

In the hours before

Local storm report, Feb 10, 11:45 PM CST, 4 hours 12 minutes before

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Special weather statement, Feb 11, 3:45 AM CST, 12 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 10, 7:12 PM CST	Areal Flood Advisory	BMX	Autauga, Dallas, Lowndes	3 hr
Feb 10, 7:14 PM CST	Special Weather Statement	BMX	Pike	46 min
Feb 10, 7:19 PM CST	Special Weather Statement	BMX	Barbour	26 min
Feb 10, 7:28 PM CST	Areal Flood Advisory	BMX	Elmore, Montgomery	3 hr
Feb 10, 7:44 PM CST	Severe Thunderstorm Warning	BMX	Barbour, Pike	46 min
Feb 10, 9:14 PM CST	Flash Flood Watch	BMX	Autauga, Bibb, Calhoun, Chilton, Clay, Cleburne and 13 more	50 hr
Feb 10, 10:43 PM CST	Areal Flood Advisory	BMX	Autauga, Dallas, Elmore, Lowndes, Montgomery	3 hr
Feb 10, 11:52 PM CST	Areal Flood Advisory	BMX	Dallas, Greene, Hale, Marengo, Perry, Sumter	3 hr
Feb 11, 1:02 AM CST	Areal Flood Warning	BMX	Dallas, Lowndes, Perry	6 hr
Feb 11, 1:39 AM CST	Areal Flood Warning	BMX	Autauga, Elmore, Montgomery	5 hr
Feb 11, 2:47 AM CST	Areal Flood Advisory	BMX	Marengo	3 hr
Feb 11, 3:45 AM CST	Special Weather Statement	BMX	Lowndes	45 min
Feb 11, 6:12 AM CST	River Flood Warning	BMX	Montgomery	4 days
Feb 11, 6:33 AM CST	Areal Flood Warning	BMX	Hale, Marengo	4 hr
Feb 11, 7:02 AM CST	Areal Flood Warning	BMX	Autauga, Dallas, Elmore, Lowndes, Macon, Marengo and 2 more	4 hr
Feb 11, 1:54 PM CST	River Flood Warning	BMX	Greene, Hale, Marengo	4 days

Nearby

Areal Flood Advisories in Alabama, 2013 Every areal flood advisory 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.