Alert archive / Alabama / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 165, NWS Birmingham, AL

April 11, 2008Jefferson County, Tuscaloosa County, Walker County, Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at Apr 11, 2008, 4:37 PM CDT for Jefferson County, Tuscaloosa County, Walker County, Alabama. It was in force for 23 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: Apr 11, 2008, 4:37 PM CDT (21:37 UTC)
Expired: Apr 11, 2008, 5:00 PM CDT
In force: 23 min
Issued by: NWS Birmingham, AL
Area: Storm-based polygon

Counties Jefferson County, AL, Tuscaloosa County, AL, Walker County, AL

The radar

The Birmingham radar (KBMX), 60 km from the middle of the area, began a volume at 21:40 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
Apr 11, 3:00 PM CDT	Tornado Watch	SPC	5 hr

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 9.6 hours before the alert went out and 59 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: 33 J/kg
Mixed-layer CIN: -160 J/kg
Mixed-layer LCL: 566 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 217 m²/s²
0-3 km storm-relative helicity: 271 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

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 Apr 11, 3:25 PM CDT, 1 hour 12 minutes earlier.

Area forecast discussion, Apr 11, 3:25 PM CDT, 1 hour 12 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BIRMINGHAM AL
325 PM CDT FRI APR 11 2008

.DISCUSSION...

WE ARE CURRENTLY IN FULL SEVERE WEATHER MODE HERE AT THE OFFICE.
STORMS WILL CONTINUE TO DEVELOP THIS AFTERNOON AND EVENING. SOME
OF THESE COULD BECOME SEVERE. SEE BHMHWOBMX FOR THE LATEST THREAT
ASSESSMENT. UPPER LEVEL DYNAMICS ARE EXPECTED TO SLOWLY MOVE
NORTH AND THUS DECREASING THE THREAT AS WE HEAD INTO THE
NIGHT...MAINLY AFTER 8 PM. HAVING SAID THAT...STAY TUNED TO NOAA
WEATHER RADIO OR YOUR LOCAL TV AFFILIATES FOR THE LATEST
CRITICAL...POTENTIALLY LIFE SAVING INFORMATION.

A BIG CHANGE IN TEMPERATURE IS EXPECTED THIS WEEKEND AND EARLY
NEXT WEEK. AFTER THESE WARM SPRING DAYS...WE WILL BRIEFLY GO BACK
TO WINTER. MODELS CONTINUE TO SHOW EXTREME COLD AIR ALOFT
ASSOCIATED WITH A UPPER LEVEL SYSTEM. THINGS ARE STILL LOOKING
PRETTY INTERESTING FOR SUNDAY NIGHT/MONDAY MORNING. A SLUG OF
MOISTURE ASSOCIATED WITH A TROF WILL MOVE ACROSS CENTRAL ALABAMA
SUNDAY NIGHT. THERE COULD BE ENOUGH MOISTURE THAT WE COULD SQUEEZE
OUT SOME FLURRIES OR LIGHT SNOW. NOTHING SIGNIFICANT BY ANY MEANS
THOUGH. BUT...WE WILL CONTINUE TO FOLLOW THE POTENTIAL CLOSELY
OVER THE NEXT FEW PACKAGES.

NEXT WEEK LOOKS TO BE PRETTY DRY WITH HIGH PRESSURE IN PLACE.
TEMPERATURES WILL SLOWLY RETURN TO NORMAL BY THE END OF THE WEEK.

10/ARM

&&

.AVIATION...18Z TAF DISCUSSION.

LINE OF STORMS COMING IN FROM THE WEST WILL AFFECT ALL TAF SITES
THIS AFTERNOON AND EARLY EVENING. BASED THE TIMING OF THESE STORMS
ON CURRENT RADAR TREND. THE ONLY FLIGHT PROBLEMS WILL OCCUR DURING A
THUNDERSTORM. THIS ACTIVITY IS EXPECTED TO LAST LATE INTO THE
EVENING HOURS. MUCH IMPROVED CONDITIONS ARE EXPECTED TOMORROW.

&&

.PRELIMINARY POINT TEMPS/POPS...
GADSDEN     54  64  36  55  33 /  70  10  10  20  20
ANNISTON    55  68  36  54  33 /  80  10  10  20  20
BIRMINGHAM  53  66  40  55  35 /  70  10  10  20  20
TUSCALOOSA  54  69  40  57  39 /  50  10  10  10  20
CALERA      56  68  41  57  37 /  70  10  10  10  20
AUBURN      58  67  42  59  36 /  70  30  10  10  20
MONTGOMERY  60  70  43  63  39 /  80  20  10  10  10
TROY        61  71  40  63  34 /  70  50  10  10  10

&&

.BMX WATCHES/WARNINGS/ADVISORIES...
AL...LAKE WIND ADVISORY IS IN EFFECT FOR ALL AREAS UNTIL 6 PM.

&&

In the hours before

Local storm report, Apr 11, 4:26 PM CDT, 11 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
426 PM CDT FRI APR 11 2008

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

0353 PM     HAIL             HOOVER                  33.38N 86.82W
04/11/2008  E1.00 INCH       JEFFERSON          AL   AMATEUR RADIO

&&

10.5

Local storm report, Apr 11, 4:27 PM CDT, 10 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
427 PM CDT FRI APR 11 2008

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

&&

10.5

Local storm report, Apr 11, 4:30 PM CDT, 7 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
430 PM CDT FRI APR 11 2008

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

0430 PM     HAIL             HOOVER                  33.39N 86.82W
04/11/2008  E1.00 INCH       JEFFERSON          AL   PUBLIC

&&

10.5

Local storm report, Apr 11, 4:32 PM CDT, 5 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
432 PM CDT FRI APR 11 2008

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

0430 PM     HAIL             BIRMINGHAM              33.53N 86.80W
04/11/2008  E1.00 INCH       JEFFERSON          AL   AMATEUR RADIO

            HWY 150 AND LORNA ROAD

0431 PM     HAIL             BIRMINGHAM              33.53N 86.80W
04/11/2008  E1.75 INCH       JEFFERSON          AL   AMATEUR RADIO

&&

10.5

Local storm report, Apr 11, 4:33 PM CDT, 4 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
433 PM CDT FRI APR 11 2008

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

0430 PM     HAIL             HOOVER                  33.38N 86.82W
04/11/2008  E1.75 INCH       JEFFERSON          AL   AMATEUR RADIO

&&

10.5

Local storm report, Apr 11, 4:37 PM CDT, 0 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
437 PM CDT FRI APR 11 2008

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

0436 PM     HAIL             CAHABA HEIGHTS          33.46N 86.73W
04/11/2008  E1.75 INCH       JEFFERSON          AL   TRAINED SPOTTER

            NUMEROUS REPORTS

&&

10.5

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 11, 9:54 AM CDT	Lake Wind Advisory	BMX	Autauga, Barbour, Bibb, Blount, Bullock, Calhoun and 33 more	8 hr
Apr 11, 12:10 PM CDT	Tornado Warning	BMX	Fayette, Marion, Walker, Winston	35 min
Apr 11, 12:52 PM CDT	Tornado Warning	BMX	Walker, Winston	38 min
Apr 11, 1:25 PM CDT	Severe Thunderstorm Warning	BMX	Lamar, Marion	50 min
Apr 11, 1:53 PM CDT	Severe Thunderstorm Warning	BMX	Fayette, Lamar, Marion, Walker, Winston	52 min
Apr 11, 1:56 PM CDT	Severe Thunderstorm Warning	BMX	Fayette, Lamar, Pickens	49 min
Apr 11, 2:14 PM CDT	Tornado Warning	BMX	Fayette, Marion, Walker, Winston	46 min
Apr 11, 2:23 PM CDT	Severe Thunderstorm Warning	BMX	Jefferson, Tuscaloosa, Walker	52 min
Apr 11, 2:28 PM CDT	Severe Thunderstorm Warning	BMX	Marengo	47 min
Apr 11, 2:38 PM CDT	Tornado Warning	BMX	Winston	22 min
Apr 11, 2:39 PM CDT	Severe Thunderstorm Warning	BMX	Fayette, Lamar, Pickens	51 min
Apr 11, 2:50 PM CDT	Severe Thunderstorm Warning	BMX	Fayette, Pickens, Tuscaloosa, Walker, Winston	40 min
Apr 11, 2:56 PM CDT	Severe Thunderstorm Warning	BMX	Bibb, Dallas, Hale, Marengo, Perry	49 min
Apr 11, 3:05 PM CDT	Tornado Warning	BMX	Fayette, Pickens, Tuscaloosa	25 min
Apr 11, 3:24 PM CDT	Severe Thunderstorm Warning	BMX	Greene, Pickens, Sumter, Tuscaloosa	51 min
Apr 11, 3:30 PM CDT	Severe Thunderstorm Warning	BMX	Fayette, Jefferson, Tuscaloosa, Walker	45 min
Apr 11, 3:41 PM CDT	Severe Thunderstorm Warning	BMX	Blount, Walker	19 min
Apr 11, 3:44 PM CDT	Severe Thunderstorm Warning	BMX	Bibb, Chilton, Jefferson, Perry, Shelby	61 min
Apr 11, 3:50 PM CDT	Tornado Warning	BMX	Jefferson, Tuscaloosa, Walker	40 min
Apr 11, 3:52 PM CDT	Severe Thunderstorm Warning	BMX	Calhoun, Cherokee, Etowah, St. Clair	38 min
Apr 11, 4:01 PM CDT	Tornado Warning	BMX	Calhoun, Cherokee, Etowah, St. Clair	44 min
Apr 11, 4:07 PM CDT	Severe Thunderstorm Warning	BMX	Blount, Etowah	38 min
Apr 11, 4:18 PM CDT	Tornado Warning	BMX	Blount, Jefferson, St. Clair	42 min
Apr 11, 4:22 PM CDT	Severe Thunderstorm Warning	BMX	Bibb, Greene, Hale, Perry, Sumter, Tuscaloosa	53 min
Apr 11, 4:34 PM CDT	Severe Thunderstorm Warning	BMX	Jefferson, St. Clair, Shelby, Talladega	41 min
Apr 11, 4:42 PM CDT	Severe Thunderstorm Warning	BMX	Bibb, Chilton, Hale, Jefferson, Perry, Shelby and 1 more	48 min
Apr 11, 4:42 PM CDT	Tornado Warning	BMX	Calhoun, Cherokee, Etowah	33 min
Apr 11, 4:56 PM CDT	Tornado Warning	BMX	Blount, Calhoun, Etowah, St. Clair	24 min
Apr 11, 5:27 PM CDT	Severe Thunderstorm Warning	BMX	Bibb, Hale, Perry, Tuscaloosa	48 min
Apr 11, 5:41 PM CDT	Tornado Warning	BMX	Bibb, Chilton, Perry	49 min
Apr 11, 6:24 PM CDT	Tornado Warning	BMX	Bibb, Chilton, Perry	51 min
Apr 11, 6:46 PM CDT	Tornado Warning	BMX	Clay, Talladega	29 min

Nearby

Severe Thunderstorm Warnings in Alabama, 2008 Every severe thunderstorm warning in 2008

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.