Alert archive / Alabama / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 337, NWS Birmingham, AL

November 30, 20106 counties in Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at Nov 30, 2010, 9:29 AM CST for 6 counties in Alabama. It was in force for 46 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: Nov 30, 2010, 9:29 AM CST (15:29 UTC)
Expired: Nov 30, 2010, 10:15 AM CST
In force: 46 min
Issued by: NWS Birmingham, AL
Area: Storm-based polygon

Counties Autauga County, AL, Chilton County, AL, Coosa County, AL, Dallas County, AL, Elmore County, AL, Lowndes County, AL

The radar

The Birmingham radar (KBMX), 70 km from the middle of the area, began a volume at 15:31 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Nov 30, 3:49 AM CST	Tornado Watch	SPC	8 hr

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 3.5 hours before the alert went out and 71 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: 444 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 484 m above ground
0-6 km bulk shear: 58 kt
0-1 km storm-relative helicity: 385 m²/s²
0-3 km storm-relative helicity: 473 m²/s²
Significant tornado parameter: 1.2
Supercell composite: 4.2

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm 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 severe thunderstorm warning went out at Nov 30, 9:28 AM CST, 1 minute earlier.

Area forecast discussion, Nov 30, 9:28 AM CST, 1 minute before

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE BIRMINGHAM AL
928 AM CST TUE NOV 30 2010

.UPDATE...15Z MESOSCALE UPDATE.

&&

.DISCUSSION... / 15Z MESOSCALE DISCUSSION /

0-6 KM SHEAR REMAINS HIGH WITH 50 KT SOUTHEAST TO 70 KT NORTHWEST.
THE COLD FRONT EXTENDED FROM DEKALB COUNTY TO SHELBY COUNTY TO
DALLAS COUNTY.  0-1 KM SRH OUT AHEAD OF THE COLD FRONT WAS STILL
HIGH WITH 300 TO 400 M2/S2 VALUES.  HOWEVER...THE 0-1 KM EHI WAS
LESS THAN 1 EVERYWHERE AND CAPE VALUES ARE VERY LOW.  BEST 3-HOUR
PRESSURE CHANGES WERE OVER EXTREME EASTERN AL TO NORTHERN GA AND
EASTERN TN.  MUCAPE WAS WEAK WITH ONLY 200 TO 300 J/KG.
PRECIPITABLE WATER VALUES WERE 1.5 TO 1.75 INCHES AHEAD OF FRONT.

LOW-LEVEL SHEAR STILL STRONG ENOUGH TO SUPPORT BOWING ECHOES AND
MESOVORTICES IN THE QLCS AHEAD OF THE COLD FRONT.  WEAK TORNADOES
POSSIBLE WITH THE MESOVORTICES.

EXPECT THIS TORNADO THREAT WILL PERSIST OVER EASTERN AL UNTIL THE
COLD FRONT CLEARS THE AREA EARLY THIS AFTERNOON.  SOME OF THE
MESOSCALE SEVERE WEATHER PARAMETERS ARE EXPECTED TO INCREASE
SLIGHTLY OVER SOUTHEAST AL BY 18Z.

03

&&

.AVIATION...12Z TAF DISCUSSION.

SIGNIFICANT AVIATION CONCERNS RELATED TO FRONTAL PASSAGE...WITH
IFR/MVFR CEILINGS...STRONG AND GUSTY SOUTHERLY WINDS.

COLD FRONT CURRENTLY APPROACHING TCL...AND WILL PASS FROM WEST TO
EAST AFFECTING ALL TAF SITES TODAY. APPROXIMATE PASSAGE TIMES OF
15-16Z AT BHM...16-17Z EET...18-20Z MGM AND ANB...AND FINALLY 21-23Z
AT TOI. BEHIND THE FRONT...EXPECT WINDS BECOMING NORTHWEST AT 10 KTS
AFTER FROPA. MVFR AND PERHAPS IFR CIGS IN CAA EXPECTED POSTFRONTAL
AND OVERNIGHT...WITH WINDS GRADUALLY RELAXING A BIT

NOTICE...KEET TAF WILL HAVE (AMD LTD TO VIS WIND AND WX) AMENDED
TO THE END OF THE FORECAST THROUGH THE END OF 2010. THE CEILOMETER
DATA WILL BE GOING THROUGH NUMEROUS TESTS AND MONITORED FOR
ACCURACY.

&&

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

&&

Hazardous weather outlook, Nov 30, 5:28 AM CST, 4 hours 1 minute before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BIRMINGHAM AL
528 AM CST TUE NOV 30 2010

ALZ011>015-017>050-011230-
AUTAUGA-BARBOUR-BIBB-BLOUNT-BULLOCK-CALHOUN-CHAMBERS-CHEROKEE-
CHILTON-CLAY-CLEBURNE-COOSA-DALLAS-ELMORE-ETOWAH-FAYETTE-GREENE-HALE-
JEFFERSON-LAMAR-LEE-LOWNDES-MACON-MARENGO-MARION-MONTGOMERY-PERRY-
PICKENS-PIKE-RANDOLPH-RUSSELL-SHELBY-ST CLAIR-SUMTER-TALLADEGA-
TALLAPOOSA-TUSCALOOSA-WALKER-WINSTON-
528 AM CST TUE NOV 30 2010

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

.DAY ONE...TODAY AND TONIGHT.

DAMAGING WINDS AND ISOLATED TORNADOES ARE POSSIBLE FOR MUCH OF
CENTRAL ALABAMA THROUGH THIS AFTERNOON. A COLD FRONT WILL SLOWLY
MOVE FROM WEST TO EAST ACROSS THE AREA ENDING THE SEVERE WEATHER
THREAT.

LOCALLY HEAVY RAINFALL WILL ALSO BE POSSIBLE...WITH RAIN
AMOUNTS OF 1 TO 3 INCHES EXPECTED AS THE FRONT MOVES THROUGH.
ISOLATED LOCATIONS MAY EXPERIENCE SOME MINOR FLOODING ESPECIALLY IN
POOR DRAINAGE AREAS.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

ACTIVATION OF STORM SPOTTERS AND EMERGENCY MANAGEMENT IS NECESSARY
THROUGH THIS AFTERNOON.

75/LINHARES

In the hours before

Local storm report, Nov 30, 6:38 AM CST, 2 hours 51 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
638 AM CST TUE NOV 30 2010

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

0620 AM     TSTM WND GST     1 SSW CORDOVA           33.74N 87.20W
11/30/2010  E60 MPH          WALKER             AL   TRAINED SPOTTER

            CAR BLOWN OFF THE ROAD AT THE CORDOVA EXIT ON CORRIDOR X.
            WINDS ESTIMATED FROM 60-70 MPH.

&&

GGOGGINS

Local storm report, Nov 30, 8:07 AM CST, 1 hour 22 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
807 AM CST TUE NOV 30 2010

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

0650 AM     TSTM WND DMG     PINSON                  33.69N 86.68W
11/30/2010                   JEFFERSON          AL   AMATEUR RADIO

            TRAFFIC LIGHTS OUT AND TREE DOWN AT INTERSECTION OF HWY
            79 AND CLAYTON ST. POWER OUT AT PINSON ELEMENTARY SCHOOL.

&&

Local storm report, Nov 30, 8:43 AM CST, 46 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
843 AM CST TUE NOV 30 2010

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

0814 AM     TSTM WND DMG     5 N BLOUNTSVILLE        34.17N 86.58W
11/30/2010                   BLOUNT             AL   EMERGENCY MNGR

            ALABAMA POWER REPORTS TREES DOWN IN THE AREA AROUND THE
            JUNCTION OF COUNTY HWYS 6 AND 49, SHOP BUILDING LOST
            ROOF. TREE DOWN ON MOBILE HOME ALONG TOWNS ROAD,NO
            INJURIES REPORTED.

&&

Local storm report, Nov 30, 8:56 AM CST, 33 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
856 AM CST TUE NOV 30 2010

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

0745 AM     TSTM WND DMG     ONEONTA                 33.95N 86.47W
11/30/2010                   BLOUNT             AL   EMERGENCY MNGR

            SEVERAL RADIO ANTENNAS DOWN AT LOCAL RADIO STATION TOWER
            IN TOWN OF ONEONTA.

&&

Local storm report, Nov 30, 9:02 AM CST, 27 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
902 AM CST TUE NOV 30 2010

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

0854 AM     TSTM WND DMG     CHELSEA                 33.33N 86.64W
11/30/2010                   SHELBY             AL   EMERGENCY MNGR

            TREES AND POWER LINES DOWN AT JUNCTIONS OF CHELSEA RD AT
            LIBERTY ROAD AND MEADOW LAKE LANE.

&&

Local storm report, Nov 30, 9:28 AM CST, 1 minute before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
928 AM CST TUE NOV 30 2010

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

0915 AM     TSTM WND DMG     4 SW TALLADEGA SUPERSPE 33.53N 86.13W
11/30/2010                   TALLADEGA          AL   EMERGENCY MNGR

            WIND BLEW CARS OFF THE ROAD ALONG AL HWY 77N. ALSO
            TWISTED ROAD SIGNS.

&&

The office that day

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

Issued	Product	Office	Counties	Lasted
Nov 29, 11:44 PM CST	Tornado Warning	BMX	Lamar, Pickens	26 min
Nov 30, 12:06 AM CST	Severe Thunderstorm Warning	BMX	Fayette, Lamar, Marion	39 min
Nov 30, 12:43 AM CST	Severe Thunderstorm Warning	BMX	Fayette, Lamar, Marion, Walker, Winston	47 min
Nov 30, 12:56 AM CST	Flash Flood Warning	BMX	Lamar	3 hr
Nov 30, 1:24 AM CST	Tornado Warning	BMX	Lamar, Pickens	36 min
Nov 30, 1:42 AM CST	Areal Flood Advisory	BMX	Fayette, Marion	3 hr
Nov 30, 2:09 AM CST	Areal Flood Advisory	BMX	Winston	111 min
Nov 30, 2:28 AM CST	Tornado Warning	BMX	Pickens	32 min
Nov 30, 2:33 AM CST	Tornado Warning	BMX	Pickens	42 min
Nov 30, 2:53 AM CST	Tornado Warning	BMX	Fayette, Pickens, Tuscaloosa	52 min
Nov 30, 3:06 AM CST	Tornado Warning	BMX	Fayette, Pickens, Tuscaloosa	39 min
Nov 30, 3:29 AM CST	Tornado Warning	BMX	Walker, Winston	46 min
Nov 30, 3:38 AM CST	Tornado Warning	BMX	Fayette, Tuscaloosa, Walker	52 min
Nov 30, 4:15 AM CST	Tornado Warning	BMX	Winston	13 min
Nov 30, 4:25 AM CST	Tornado Warning	BMX	Walker	8 min
Nov 30, 4:39 AM CST	Severe Thunderstorm Warning	BMX	Greene, Pickens, Sumter	51 min
Nov 30, 4:43 AM CST	Tornado Warning	BMX	Greene, Pickens, Sumter	32 min
Nov 30, 5:04 AM CST	Severe Thunderstorm Warning	BMX	Fayette, Tuscaloosa, Walker	26 min
Nov 30, 5:32 AM CST	Severe Thunderstorm Warning	BMX	Greene, Pickens, Tuscaloosa	43 min
Nov 30, 5:41 AM CST	Severe Thunderstorm Warning	BMX	Greene, Sumter	34 min
Nov 30, 5:44 AM CST	Tornado Warning	BMX	Walker, Winston	46 min
Nov 30, 6:02 AM CST	Tornado Warning	BMX	Fayette, Tuscaloosa, Walker	28 min
Nov 30, 6:18 AM CST	Severe Thunderstorm Warning	BMX	Blount, Jefferson, Tuscaloosa, Walker	42 min
Nov 30, 6:55 AM CST	Severe Thunderstorm Warning	BMX	Blount, Etowah, Jefferson, St. Clair, Shelby, Tuscaloosa	50 min
Nov 30, 7:41 AM CST	Severe Thunderstorm Warning	BMX	Blount, Etowah, Jefferson, St. Clair, Shelby, Talladega	49 min
Nov 30, 7:59 AM CST	Tornado Warning	BMX	Bibb, Chilton, Perry, Shelby	46 min
Nov 30, 8:04 AM CST	Severe Thunderstorm Warning	BMX	Dallas	41 min
Nov 30, 8:24 AM CST	Tornado Warning	BMX	Dallas	36 min
Nov 30, 8:27 AM CST	Severe Thunderstorm Warning	BMX	Calhoun, Cherokee, Clay, Etowah, St. Clair, Shelby and 1 more	48 min
Nov 30, 8:42 AM CST	Tornado Warning	BMX	Shelby	15 min
Nov 30, 8:49 AM CST	Severe Thunderstorm Warning	BMX	Autauga, Chilton, Dallas	41 min
Nov 30, 8:54 AM CST	Severe Thunderstorm Warning	BMX	Cherokee, Etowah	51 min
Nov 30, 9:13 AM CST	Tornado Warning	BMX	Autauga, Chilton	20 min
Nov 30, 9:16 AM CST	Severe Thunderstorm Warning	BMX	Calhoun, Clay, Etowah, St. Clair, Talladega	44 min
Nov 30, 9:35 AM CST	Severe Thunderstorm Warning	BMX	Cherokee, Etowah	25 min
Nov 30, 9:45 AM CST	Severe Thunderstorm Warning	BMX	Calhoun, Cherokee, Clay, Cleburne, Randolph, Talladega	45 min
Nov 30, 9:45 AM CST	Tornado Warning	BMX	Chilton, Coosa	30 min
Nov 30, 10:00 AM CST	Severe Thunderstorm Warning	BMX	Cherokee	30 min
Nov 30, 10:08 AM CST	Severe Thunderstorm Warning	BMX	Coosa, Elmore, Lowndes, Montgomery, Tallapoosa	52 min
Nov 30, 10:13 AM CST	Tornado Warning	BMX	Clay	32 min
Nov 30, 10:20 AM CST	Tornado Warning	BMX	Elmore	25 min
Nov 30, 10:27 AM CST	Severe Thunderstorm Warning	BMX	Calhoun, Cherokee, Clay, Cleburne, Randolph	63 min
Nov 30, 10:42 AM CST	Tornado Warning	BMX	Coosa, Elmore, Tallapoosa	20 min
Nov 30, 10:54 AM CST	Severe Thunderstorm Warning	BMX	Chambers, Elmore, Lee, Tallapoosa	51 min
Nov 30, 11:28 AM CST	Severe Thunderstorm Warning	BMX	Cleburne, Randolph	32 min
Nov 30, 11:46 AM CST	Severe Thunderstorm Warning	BMX	Chambers	29 min
Nov 30, 11:57 AM CST	Severe Thunderstorm Warning	BMX	Bullock, Pike	48 min
Nov 30, 12:16 PM CST	Tornado Warning	BMX	Bullock, Pike	44 min
Nov 30, 12:37 PM CST	Severe Thunderstorm Warning	BMX	Lee, Russell	38 min
Nov 30, 1:16 PM CST	Severe Thunderstorm Warning	BMX	Lee, Russell	14 min
Nov 30, 1:29 PM CST	Severe Thunderstorm Warning	BMX	Barbour, Russell	46 min

Nearby

Severe Thunderstorm Warnings in Alabama, 2010 Every severe thunderstorm 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.