Alert archive / Alabama / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 252, NWS Birmingham, AL

May 13, 1999Tallapoosa County, Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at May 13, 1999, 2:26 PM CDT for Tallapoosa County, Alabama. It was in force for 34 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: May 13, 1999, 2:26 PM CDT (19:26 UTC)
Expired: May 13, 1999, 3:00 PM CDT
In force: 34 min
Issued by: NWS Birmingham, AL
Area: Whole counties

County Tallapoosa County, AL

The radar

The Maxwell AFB radar (KMXX), 36 km from the middle of the area, began a volume at 19:26 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
May 13, 1:45 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 7.4 hours before the alert went out and 98 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: 904 J/kg
Mixed-layer CIN: -48 J/kg
Mixed-layer LCL: 590 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 33 m²/s²
0-3 km storm-relative helicity: 107 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.9

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KBHM 131925 RRA
SVRBHM
ALC123-132000-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BIRMINGHAM AL
226 PM CDT THU MAY 13 1999

THE NATIONAL WEATHER SERVICE IN BIRMINGHAM HAS ISSUED...A

* SEVERE THUNDERSTORM WARNING FOR...
  TALLAPOOSA COUNTY...IN EAST CENTRAL ALABAMA...

* UNTIL 300 PM CDT.

* AT 225 PM CDT... WEATHER RADAR SHOWED A CLUSTER OF SEVERE
  THUNDERSTORMS...PRODUCING LARGE HAIL...OVER SOUTHERN TALLAPOSSA
COUNTY.  THESE STORMS WERE MOVING EAST AT 25 MPH.

THIS IS A DANGEROUS STORM! STAY INDOORS AWAY FROM WINDOWS.

The office that day

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

Issued	Product	Office	Counties	Lasted
May 13, 2:24 AM CDT	Severe Thunderstorm Warning	BMX	Limestone, Madison	46 min
May 13, 11:25 AM CDT	Severe Thunderstorm Warning	BMX	DeKalb	35 min
May 13, 11:35 AM CDT	Severe Thunderstorm Warning	BMX	Cherokee	35 min
May 13, 11:39 AM CDT	Severe Thunderstorm Warning	BMX	Jackson	51 min
May 13, 11:41 AM CDT	Severe Thunderstorm Warning	BMX	Morgan	49 min
May 13, 11:48 AM CDT	Severe Thunderstorm Warning	BMX	Madison, Marshall	62 min
May 13, 11:51 AM CDT	Severe Thunderstorm Warning	BMX	Limestone	34 min
May 13, 11:59 AM CDT	Severe Thunderstorm Warning	BMX	DeKalb	66 min
May 13, 12:02 PM CDT	Severe Thunderstorm Warning	BMX	Cherokee	63 min
May 13, 12:14 PM CDT	Severe Thunderstorm Warning	BMX	Etowah	36 min
May 13, 12:32 PM CDT	Severe Thunderstorm Warning	BMX	Coosa	48 min
May 13, 12:55 PM CDT	Severe Thunderstorm Warning	BMX	Autauga	50 min
May 13, 1:15 PM CDT	Severe Thunderstorm Warning	BMX	Coosa	40 min
May 13, 1:26 PM CDT	Severe Thunderstorm Warning	BMX	Tallapoosa	64 min
May 13, 1:28 PM CDT	Severe Thunderstorm Warning	BMX	Cherokee	32 min
May 13, 1:35 PM CDT	Tornado Warning	BMX	Coosa	35 min
May 13, 1:37 PM CDT	Severe Thunderstorm Warning	BMX	Clay	48 min
May 13, 1:38 PM CDT	Tornado Warning	BMX	Elmore, Tallapoosa	32 min
May 13, 1:45 PM CDT	Severe Thunderstorm Warning	BMX	Madison	35 min
May 13, 1:48 PM CDT	Severe Thunderstorm Warning	BMX	Jackson	47 min
May 13, 1:52 PM CDT	Severe Thunderstorm Warning	BMX	Autauga	33 min
May 13, 2:00 PM CDT	Severe Thunderstorm Warning	BMX	Elmore	35 min
May 13, 2:06 PM CDT	Severe Thunderstorm Warning	BMX	DeKalb	34 min
May 13, 2:08 PM CDT	Severe Thunderstorm Warning	BMX	Randolph	32 min
May 13, 2:10 PM CDT	Severe Thunderstorm Warning	BMX	Jackson	35 min
May 13, 2:16 PM CDT	Severe Thunderstorm Warning	BMX	Montgomery	49 min
May 13, 2:29 PM CDT	Severe Thunderstorm Warning	BMX	Chilton	21 min
May 13, 2:33 PM CDT	Severe Thunderstorm Warning	BMX	Elmore	32 min
May 13, 2:37 PM CDT	Severe Thunderstorm Warning	BMX	Coosa	48 min
May 13, 2:44 PM CDT	Severe Thunderstorm Warning	BMX	Macon	46 min
May 13, 2:49 PM CDT	Severe Thunderstorm Warning	BMX	Lee	46 min
May 13, 2:54 PM CDT	Tornado Warning	BMX	Tallapoosa	36 min
May 13, 3:10 PM CDT	Severe Thunderstorm Warning	BMX	Montgomery	35 min
May 13, 3:21 PM CDT	Severe Thunderstorm Warning	BMX	Bullock	64 min
May 13, 3:25 PM CDT	Severe Thunderstorm Warning	BMX	Randolph	50 min
May 13, 3:29 PM CDT	Severe Thunderstorm Warning	BMX	Autauga	36 min
May 13, 3:37 PM CDT	Severe Thunderstorm Warning	BMX	Lee	48 min
May 13, 3:43 PM CDT	Severe Thunderstorm Warning	BMX	Macon	32 min
May 13, 3:52 PM CDT	Severe Thunderstorm Warning	BMX	Russell	33 min
May 13, 4:18 PM CDT	Severe Thunderstorm Warning	BMX	Barbour	47 min
May 13, 4:53 PM CDT	Severe Thunderstorm Warning	BMX	Lee	47 min
May 13, 5:29 PM CDT	Severe Thunderstorm Warning	BMX	Bullock	51 min
May 13, 5:43 PM CDT	Severe Thunderstorm Warning	BMX	Barbour	47 min
May 13, 6:04 PM CDT	Severe Thunderstorm Warning	BMX	Russell	51 min
May 13, 6:34 PM CDT	Severe Thunderstorm Warning	BMX	Barbour	51 min

Nearby

Severe Thunderstorm Warnings in Alabama, 1999 Every severe thunderstorm warning in 1999

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.