Alert archive / Mississippi / Severe Thunderstorm Warnings in 1991

Severe Thunderstorm Warning 29, NWS Mobile, AL

April 25, 1991Hancock County, Mississippi

NWS Mobile, AL issued this severe thunderstorm warning at Apr 25, 1991, 6:02 AM CDT for Hancock County, Mississippi. It was in force for 73 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: Apr 25, 1991, 6:02 AM CDT (11:02 UTC)
Expired: Apr 25, 1991, 7:15 AM CDT
In force: 73 min
Issued by: NWS Mobile, AL
Area: Whole counties

County Hancock County, MS

What was reported inside it

Time	Report	Where	Remark
Apr 25, 6:45 AM CDT	Thunderstorm Wind 0	Hancock, 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 00:00Z, 11.0 hours before the alert went out and 27 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: 22 J/kg
Mixed-layer CIN: -424 J/kg
Mixed-layer LCL: 1331 m above ground
0-6 km bulk shear: 57 kt
0-1 km storm-relative helicity: -35 m²/s²
0-3 km storm-relative helicity: 121 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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.

In the hours before

Special weather statement, Apr 25, 2:48 AM CDT, 3 hours 14 minutes before

MSZ014-013-250900-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
145 AM CDT THU APR 25 1991

...SEVERE THUNDERSTORM WATCH IN EFFECT UNTIL 600 AM CDT FOR ALL
COUNTIES IN SOUTHEAST MISSISSIPPI AND THE ADJACENT COASTAL WATERS...

AT 140 AM CDT MOBILE RADAR INDICATED SCATTERED INTENSE THUNDERSTORMS
OVER SOUTHEAST LOUISINA AND VERY STRONG THUNDERSTORMS DEVELOPING IN
SOUTHEAST MISSISSIPPI.  THESE THUNDERSTORMS WILL PRODUCE STRONG GUSTY
WINDS...HEAVY RAINFALL...DANGEROUS LIGHTNING AND POSSIBLY SOME HAILL.
THUNDERSTORMS WAS MOVING TO THE NORTHEAST AT 45 MILES AN HOUR.

TORNADOES ARE POSSIBLE IN THE WATCH AREA...OBSERVE SAFETY RULES IF
THREATENING WEATHER APPROACHES.

Special weather statement, Apr 25, 3:35 AM CDT, 2 hours 27 minutes before

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Special weather statement, Apr 25, 4:06 AM CDT, 1 hour 56 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 25, 3:20 AM CDT	Tornado Warning	MOB	Mobile	55 min
Apr 25, 3:20 AM CDT	Tornado Warning	MOB	Baldwin	55 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.