Alert archive / Alabama / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 378, NWS Birmingham, AL

July 13, 2008Elmore County, Macon County, Tallapoosa County, Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at Jul 13, 2008, 1:43 PM CDT for Elmore County, Macon County, Tallapoosa County, Alabama. It was in force for 47 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: Jul 13, 2008, 1:43 PM CDT (18:43 UTC)
Expired: Jul 13, 2008, 2:30 PM CDT
In force: 47 min
Issued by: NWS Birmingham, AL
Area: Storm-based polygon

Counties Elmore County, AL, Macon County, AL, Tallapoosa County, AL

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 6.7 hours before the alert went out and 105 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: 1991 J/kg
Mixed-layer CIN: -33 J/kg
Mixed-layer LCL: 830 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 32 m²/s²
0-3 km storm-relative helicity: 14 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 1.7

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 Jul 13, 12:45 PM CDT, 58 minutes earlier.

Area forecast discussion, Jul 13, 12:45 PM CDT, 58 minutes before

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Hazardous weather outlook, Jul 13, 1:15 PM CDT, 28 minutes before

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In the hours before

Special weather statement, Jul 13, 11:35 AM CDT, 2 hours 8 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
1135 AM CDT SUN JUL 13 2008

ALZ020-131700-
CHEROKEE-
1135 AM CDT SUN JUL 13 2008

...SIGNIFICANT WEATHER ALERT FOR CHEROKEE COUNTY UNTIL NOON CDT...

AT 1135 AM CDT...THE NATIONAL WEATHER SERVICE IS TRACKING A STRONG
THUNDERSTORM 6 MILES SOUTHEAST OF FORT PAYNE...MOVING EAST AT 21 MPH.

WINDS UP TO 40 MPH ARE EXPECTED WITH THIS STORM.

* LOCATIONS IN OR NEAR THE PATH INCLUDE...
  CLOUDLAND.
  NEW MOON.
  FULLERTON.

THIS THUNDERSTORM COULD INTENSIFY QUICKLY...SO BE READY TO ACT IF A
WARNING IS ISSUED.

STAY TUNED TO NOAA WEATHER RADIO...COMMERCIAL RADIO...OR YOUR LOCAL
TELEVISION STATIONS FOR LATER STATEMENTS AND POSSIBLE WARNINGS
CONCERNING THIS WEATHER SITUATION.

TG

Local storm report, Jul 13, 12:18 PM CDT, 1 hour 25 minutes before

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Special weather statement, Jul 13, 12:20 PM CDT, 1 hour 23 minutes before

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Special weather statement, Jul 13, 12:51 PM CDT, 52 minutes before

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Special weather statement, Jul 13, 12:55 PM CDT, 48 minutes before

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Special weather statement, Jul 13, 1:10 PM CDT, 33 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
Jul 13, 11:46 AM CDT	Severe Thunderstorm Warning	BMX	Cherokee	29 min
Jul 13, 2:05 PM CDT	Severe Thunderstorm Warning	BMX	Montgomery, Pike	40 min
Jul 13, 6:38 PM CDT	Severe Thunderstorm Warning	BMX	Autauga, Lowndes	37 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.