Alert archive / Alabama / Areal Flood Warnings in 2012

Areal Flood Warning 1, NWS Birmingham, AL

January 23, 2012Clay County, Tallapoosa County, Alabama

NWS Birmingham, AL issued this areal flood warning at Jan 23, 2012, 10:20 AM CST for Clay County, Tallapoosa County, Alabama. It was in force for 4 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: Jan 23, 2012, 10:20 AM CST (16:20 UTC)
Expired: Jan 23, 2012, 2:30 PM CST
In force: 4 hr
Issued by: NWS Birmingham, AL
Area: Storm-based polygon
Flood severity: None

Counties Clay County, AL, Tallapoosa County, AL

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 4.3 hours before the alert went out and 128 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: 463 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: 492 m²/s²
0-3 km storm-relative helicity: 722 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 areal flood warning 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 warning went out at Jan 23, 7:15 AM CST, 3 hours 5 minutes earlier.

Area forecast discussion, Jan 23, 7:15 AM CST, 3 hours 5 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BIRMINGHAM AL
715 AM CST MON JAN 23 2012

.UPDATE...
MESOSCALE UPDATE.

&&

.DISCUSSION...

THE SEVERE THREAT WILL REMAIN FOR EASTERN AND SOUTHEASTERN
COUNTIES OF OUR CWA THROUGH THIS MORNING...AS THE LINE OF STORMS
THAT PRODUCED DAMAGING TORNADOES CONTINUES TO MOVE SOUTH AND
EASTWARD. SURFACE OBSERVATIONS STILL REVEAL A VERY WARM AND
UNSTABLE AIR MASS THAT WILL EVENTUALLY OVERTAKE THE WEDGE FRONT
THAT IS BASICALLY STRETCHED NORTH TO SOUTH OVER THE
ALABAMA/GEORGIA LINE. THE STORMS WILL BEGIN TO MOVE INTO A
RELATIVELY WEAKER AREA OF LOW LEVEL SHEAR AND 0-6KM BULK SHEAR
OVER TIME...BUT WILL BE MORE THAN ENOUGH SHEAR FOR CONTINUED SEVERE
STORM DEVELOPMENT ACROSS OUR SOUTHEAST AND SOUTHERN COUNTIES. RUC
ANALYSIS INDICATES 500-1000J/KG OF SB CAPE ACROSS THOSE AREAS THAT
WILL HELP INTENSIFY AND DEVELOP ADDITIONAL STORMS.
THEREFORE...HAVE EXPANDED THE TORNADO WATCH SOUTH AND EASTWARD.
MEANWHILE...STABLE AIR IS BEGINNING TO FILTER IN BEHIND THE
STORMS...WITH A DRY LINE NOW ANALYZED ACROSS EAST MS WITH LOWER
50S AND UPPER 40S DEWPOINTS BEING OBSERVED THERE. ALTHOUGH THE DRY
LINE IS LAGGING BEHIND THE BROKEN LINE OF STORMS AND 60S DEWPOINTS
ARE STILL BEING OBSERVED FOR TUSCALOOSA AND BIRMINGHAM...THE
STABLE AIR WILL HOPEFULLY OVERTAKE WHAT MOISTURE STILL REMAINS. A
FEW SHOWERS COULD STILL BE POSSIBLE ALONG THE DRY LINE AS IT
MOVES INTO CENTRAL ALABAMA. THERE IS A BIT OF ELEVATED
INSTABILITY AHEAD OF THE DRY LINE...SO WILL KEEP AN EYE ON IT
THROUGH THE MORNING BUT NOT EXPECTING ANY MORE THAN A POSSIBLE
SHOWER OR TWO AT THIS TIME.

56/GDG

&&

.AVIATION...
12Z TAF DISCUSSION.

LINE OF SHOWERS AND THUNDERSTORMS ARE NEAR GADSDEN TO DEMOPOLIS.
THIS ACTIVITY WILL SLOWLY SPREAD ACROSS THE SOUTHEASTERN HALF OF THE
AREA THIS MORNING. THUNDERSTORMS WILL BE CAPABLE OF PRODUCING
DAMAGING WINDS...LARGE HAIL...HEAVY RAINFALL...AND TORNADOES. HAVE
TIMED OUT CONVECTION FOR EACH TERMINAL BASED ON CURRENT
MOTIONS...AND WILL ADJUST AS NEEDED. CONVECTION WILL MOVE INTO MGM
NEAR 13Z AND TOI NEAR 14Z. MOST OF THE ACTIVITY WILL BE OUT BY NOON
AT THE LATEST.

BEHIND THE FRONT...WINDS WILL TURN TO THE NORTHWEST AND SKIES WILL
CLEAR THROUGH THE AFTERNOON.

16

&&

.PRELIMINARY POINT TEMPS/POPS...
GADSDEN     65  36  60  40  60 / 100   0   0  30  30
ANNISTON    67  38  61  44  61 / 100  10   0  30  30
BIRMINGHAM  67  40  61  46  62 / 100   0  10  40  30
TUSCALOOSA  67  39  62  47  65 /  80   0  10  50  30
CALERA      67  40  62  46  64 / 100   0  10  40  30
AUBURN      67  45  62  49  65 / 100  40  10  30  30
MONTGOMERY  69  44  64  49  70 / 100  20  20  50  30
TROY        70  47  64  51  71 / 100  40  20  40  20

&&

.BMX WATCHES/WARNINGS/ADVISORIES...
NONE.

&&

56/16

Hazardous weather outlook, Jan 23, 10:11 AM CST, 9 minutes before

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In the hours before

Local storm report, Jan 23, 8:36 AM CST, 1 hour 44 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
836 AM CST MON JAN 23 2012

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0436 AM     TSTM WND DMG     SPROTT                  32.68N 87.22W
01/23/2012                   PERRY              AL   PARK/FOREST SRVC

            POSSIBLE TORNADO - CR HWY 183- MANY TREES BLOCKING HWY
            SPROTT TO SR 82 - OAKMULGEE DAMAGE AS WELL

&&

MBAER

Local storm report, Jan 23, 9:14 AM CST, 1 hour 6 minutes before

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Local storm report, Jan 23, 9:16 AM CST, 1 hour 4 minutes before

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Local storm report, Jan 23, 9:19 AM CST, 1 hour 1 minute before

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Local storm report, Jan 23, 9:20 AM CST, 1 hour before

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Local storm report, Jan 23, 10:06 AM CST, 14 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
Jan 23, 12:22 AM CST	Severe Thunderstorm Warning	BMX	Marion	23 min
Jan 23, 1:19 AM CST	Severe Thunderstorm Warning	BMX	Marion	41 min
Jan 23, 1:56 AM CST	Severe Thunderstorm Warning	BMX	Pickens, Tuscaloosa	49 min
Jan 23, 2:09 AM CST	Tornado Warning	BMX	Pickens	36 min
Jan 23, 2:23 AM CST	Tornado Warning	BMX	Greene, Sumter	52 min
Jan 23, 2:31 AM CST	Tornado Warning	BMX	Tuscaloosa	44 min
Jan 23, 3:02 AM CST	Tornado Warning	BMX	Jefferson, Tuscaloosa, Walker	43 min
Jan 23, 3:04 AM CST	Tornado Warning	BMX	Greene, Sumter	41 min
Jan 23, 3:32 AM CST	Tornado Warning	BMX	Blount, Jefferson, St. Clair	58 min
Jan 23, 3:33 AM CST	Tornado Warning	BMX	Bibb, Greene, Hale, Perry	42 min
Jan 23, 3:50 AM CST	Areal Flood Advisory	BMX	Jefferson, Tuscaloosa, Walker	115 min
Jan 23, 4:15 AM CST	Tornado Warning Emergency	BMX	Blount, Calhoun, Etowah, Jefferson, St. Clair	60 min
Jan 23, 4:27 AM CST	Tornado Warning	BMX	Bibb, Chilton, Dallas, Hale, Perry	48 min
Jan 23, 5:11 AM CST	Tornado Warning Emergency	BMX	Chilton, Coosa	34 min
Jan 23, 5:24 AM CST	Tornado Warning	BMX	Clay, Shelby, Talladega	26 min
Jan 23, 5:37 AM CST	Tornado Warning	BMX	Chilton, Coosa, Talladega	38 min
Jan 23, 6:01 AM CST	Tornado Warning	BMX	Clay, Coosa, Tallapoosa	44 min
Jan 23, 6:22 AM CST	Areal Flood Advisory	BMX	Chilton, Coosa	3 hr
Jan 23, 6:34 AM CST	Areal Flood Advisory	BMX	Dallas, Perry	116 min
Jan 23, 6:36 AM CST	Tornado Warning	BMX	Autauga, Chilton, Coosa, Elmore	39 min
Jan 23, 7:12 AM CST	Severe Thunderstorm Warning	BMX	Coosa, Elmore, Tallapoosa	48 min
Jan 23, 7:15 AM CST	Tornado Warning	BMX	Chambers, Randolph, Tallapoosa	17 min
Jan 23, 7:24 AM CST	Areal Flood Advisory	BMX	Talladega	111 min
Jan 23, 7:32 AM CST	Areal Flood Advisory	BMX	Chambers, Clay, Randolph, Tallapoosa	3 hr
Jan 23, 7:42 AM CST	Tornado Warning	BMX	Chambers, Tallapoosa	33 min
Jan 23, 8:09 AM CST	Severe Thunderstorm Warning	BMX	Elmore, Tallapoosa	36 min
Jan 23, 8:14 AM CST	Areal Flood Advisory	BMX	Autauga, Dallas, Lowndes	3 hr
Jan 23, 8:20 AM CST	Severe Thunderstorm Warning	BMX	Lowndes, Montgomery	25 min
Jan 23, 8:34 AM CST	Severe Thunderstorm Warning	BMX	Elmore, Lee, Macon, Tallapoosa	41 min
Jan 23, 8:38 AM CST	Flash Flood Warning	BMX	Chambers, Randolph	4 hr
Jan 23, 8:44 AM CST	Severe Thunderstorm Warning	BMX	Montgomery	31 min
Jan 23, 8:45 AM CST	Areal Flood Advisory	BMX	Chambers, Lee, Macon, Tallapoosa	3 hr
Jan 23, 9:09 AM CST	Severe Thunderstorm Warning	BMX	Bullock, Elmore, Macon, Montgomery	36 min
Jan 23, 9:12 AM CST	Severe Thunderstorm Warning	BMX	Lowndes, Montgomery	48 min
Jan 23, 9:19 AM CST	Severe Thunderstorm Warning	BMX	Lee, Macon, Russell	41 min
Jan 23, 10:32 AM CST	Severe Thunderstorm Warning	BMX	Lee, Russell	28 min
Jan 23, 12:12 PM CST	River Flood Warning	BMX	Chambers, Elmore, Macon, Randolph, Tallapoosa	2 hr

Nearby

Areal Flood Warnings in Alabama, 2012 Every areal flood warning in 2012

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.