Alert archive / Mississippi / Severe Thunderstorm Warnings in 1991

Severe Thunderstorm Warning 73, NWS Mobile, AL

June 4, 1991Hancock County, Harrison County, Mississippi

NWS Mobile, AL issued this severe thunderstorm warning at Jun 4, 1991, 2:37 PM CDT for Hancock County, Harrison County, Mississippi. It was in force for 68 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Jun 4, 1991, 2:37 PM CDT (19:37 UTC)
Expired: Jun 4, 1991, 3:45 PM CDT
In force: 68 min
Issued by: NWS Mobile, AL
Area: Whole counties

Counties Hancock County, MS, Harrison County, MS

What was reported inside it

Time	Report	Where	Remark
Jun 4, 2:40 PM CDT	Hail 0.8	Harrison, MS

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 7.6 hours before the alert went out and 44 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: 1608 J/kg
Mixed-layer CIN: -82 J/kg
Mixed-layer LCL: 1037 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 22 m²/s²
0-3 km storm-relative helicity: 42 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 
TTAA00 KMOB 041939
SVRMOB
MSC045-047-042045-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM AND SPECIAL MARINE WARNING
NATIONAL WEATHER SERVICE MOBILE AL
237 PM CDT TUE JUN 4 1991
 
THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A
SEVERE THUNDERSTORM AND SPECIAL MARINE WARNING
EFFECTIVE UNTIL  345 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN SOUTHEAST MISSISSIPPI
 
   ...SOUTHEASTERN HANCOCK COUNTY...SOUTHERN HARRISON COUNTY
AT 235 PM CDT MOBILE RADAR SHOWED A SEVERE THUNDERSTORM 4 MILES WEST
OF GULFPORT MISSISSIPPI. THE STORM WAS DRIFTING SOUTH AT 10 MPH...
OTHER ISOLATED THUNDERSTORMS WERE OVER COASTAL AREA OF SOUTHEAST
MISSISSIPPI.
 
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55
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
DON'T DRIVE INTO AREAS WHERE WATER COVERS THE 6ROAD.

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 4, 4:09 PM CDT	Severe Thunderstorm Warning	MOB	Pearl River	66 min
Jun 4, 4:18 PM CDT	Severe Thunderstorm Warning	MOB	Stone	57 min
Jun 4, 5:04 PM CDT	Severe Thunderstorm Warning	MOB	Perry	41 min

Nearby

Severe Thunderstorm Warnings in Mississippi, 1991 Every severe thunderstorm warning in 1991

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.