Alert archive / Alabama / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 430, NWS Birmingham, AL

July 29, 2008Jefferson County, Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at Jul 29, 2008, 5:49 PM CDT for Jefferson County, Alabama. It was in force for 26 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 29, 2008, 5:49 PM CDT (22:49 UTC)
Expired: Jul 29, 2008, 6:15 PM CDT
In force: 26 min
Issued by: NWS Birmingham, AL
Area: Storm-based polygon

County Jefferson County, AL

The radar

The Birmingham radar (KBMX), 50 km from the middle of the area, began a volume at 22:52 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 nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 10.8 hours before the alert went out and 48 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: 1948 J/kg
Mixed-layer CIN: -56 J/kg
Mixed-layer LCL: 846 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 13 m²/s²
0-3 km storm-relative helicity: 16 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WUUS54 KBMX 292249
SVRBMX
ALC073-292315-
/O.NEW.KBMX.SV.W.0430.080729T2249Z-080729T2315Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BIRMINGHAM AL
549 PM CDT TUE JUL 29 2008

THE NATIONAL WEATHER SERVICE IN BIRMINGHAM HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL JEFFERSON COUNTY IN CENTRAL ALABAMA...

* UNTIL 615 PM CDT

* AT 547 PM CDT...THE NATIONAL WEATHER SERVICE INDICATED A SEVERE
  THUNDERSTORM CAPABLE OF PRODUCING NICKEL SIZE HAIL...AND DAMAGING
  WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR MAYTOWN...
  OR 8 MILES NORTHWEST OF FAIRFIELD. THIS STORM WAS NEARLY   
STATIONARY OR MOVING SLOWLY WESTWARD..

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  MAYTOWN BY 605 PM CDT...
  MULGA...SYLVAN SPRINGS...MINOR AND 6 MILES SOUTHWEST OF FORESTDALE
  BY 615 PM CDT...

WINDS OF 60 TO 70 MPH WILL BREAK LARGE TREE LIMBS AND CAUSE SOME
DAMAGE...ESPECIALLY TO SMALLER STRUCTURES.

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...HAIL...AND DEADLY CLOUD TO GROUND
LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...PREFERABLY
INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

TO REPORT SEVERE WEATHER...
CALL 1-800-856-0758.

LAT...LON 3347 8687 3350 8703 3348 8721 3361 8714
      3361 8712 3371 8700 3372 8683
TIME...MOT...LOC 2249Z 322DEG 2KT 3356 8701

$$

KSL

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 29, 3:05 PM CDT	Severe Thunderstorm Warning	BMX	Hale, Tuscaloosa	25 min
Jul 29, 4:54 PM CDT	Severe Thunderstorm Warning	BMX	Jefferson	36 min
Jul 29, 5:03 PM CDT	Severe Thunderstorm Warning	BMX	Etowah	27 min
Jul 29, 5:08 PM CDT	Areal Flood Advisory	BMX	Jefferson, Shelby	3 hr
Jul 29, 5:19 PM CDT	Severe Thunderstorm Warning	BMX	Etowah, St. Clair	26 min
Jul 29, 5:28 PM CDT	Severe Thunderstorm Warning	BMX	Fayette, Tuscaloosa	32 min
Jul 29, 5:29 PM CDT	Severe Thunderstorm Warning	BMX	Jefferson, St. Clair	31 min
Jul 29, 5:38 PM CDT	Severe Thunderstorm Warning	BMX	St. Clair, Talladega	37 min
Jul 29, 6:02 PM CDT	Severe Thunderstorm Warning	BMX	Jefferson, St. Clair	28 min
Jul 29, 6:15 PM CDT	Severe Thunderstorm Warning	BMX	Calhoun, St. Clair, Talladega	30 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.