Alert archive / Alabama / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 346, NWS Birmingham, AL

May 27, 1997Winston County, Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at May 27, 1997, 12:19 AM CDT for Winston County, Alabama. It was in force for 36 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 27, 1997, 12:19 AM CDT (05:19 UTC)
Expired: May 27, 1997, 12:55 AM CDT
In force: 36 min
Issued by: NWS Birmingham, AL
Area: Whole counties

County Winston County, AL

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 26, 10:15 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Birmingham, AL (KBMX), launched 00:00Z, 5.3 hours before the alert went out and 121 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: 2887 J/kg
Mixed-layer CIN: -3 J/kg
Mixed-layer LCL: 1128 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 83 m²/s²
0-3 km storm-relative helicity: 101 m²/s²
Significant tornado parameter: 0.7
Supercell composite: 5.0

Open this sounding in Storm Lab

The text

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

039 
WUUS1 KBHM 270520 RRA
SVRBHM
ALC133-270555-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BIRMINGHAM AL
1219 AM CDT TUE MAY 27 1997

THE NATIONAL WEATHER SERVICE IN BIRMINGHAM AL HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1255 AM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN NORTHERN ALABAMA

   ...EASTERN WINSTON COUNTY
 
AT 1218 AM CDT...WEATHER RADAR SHOWED A LINE OF SEVERE THUNDERSTORMS
MOVING THROUGH EASTERN WINSTON COUNTY.  THE STORMS WERE MOVING
SOUTHEAST AT 30 MPH AND WILL AFFECT ADDISON AND ARLEY.
 
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MPH...
DESTRUCTIVE HAIL... DEADLY LIGHTNING... AND VERY HEAVY RAIN. FOR
YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF
YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DONT
DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.

The office that day

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

Issued	Product	Office	Counties	Lasted
May 26, 9:43 PM CDT	Severe Thunderstorm Warning	BMX	Lauderdale	62 min
May 26, 10:18 PM CDT	Severe Thunderstorm Warning	BMX	Colbert	42 min
May 26, 10:53 PM CDT	Tornado Warning	BMX	Colbert, Franklin	67 min
May 26, 11:01 PM CDT	Severe Thunderstorm Warning	BMX	Marion, Winston	49 min
May 26, 11:15 PM CDT	Severe Thunderstorm Warning	BMX	Lawrence	60 min
May 26, 11:39 PM CDT	Tornado Warning	BMX	Winston	36 min
May 27, 12:04 AM CDT	Severe Thunderstorm Warning	BMX	Cullman	61 min

Nearby

Severe Thunderstorm Warnings in Alabama, 1997 Every severe thunderstorm warning in 1997

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.