Alert archive / Mississippi / Severe Thunderstorm Warnings in 1989

Severe Thunderstorm Warning 1, NWS Mobile, AL

February 20, 1989Harrison County, Mississippi

NWS Mobile, AL issued this severe thunderstorm warning at Feb 20, 1989, 3:05 PM CST for Harrison County, Mississippi. It was in force for 55 min.

The area

The counties it named.

The facts

Issued
Feb 20, 1989, 3:05 PM CST (21:05 UTC)
Expired
Feb 20, 1989, 4:00 PM CST
In force
55 min
Issued by
NWS Mobile, AL
Area
Whole counties

County Harrison County, MS

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 9.1 hours before the alert went out and 62 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-pSkew-T log-p diagram, Slidell Radar S, LA at 12:00Z on 1989-02-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Slidell Radar S, LA at 12:00Z on 1989-02-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 79 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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
2 J/kg
Mixed-layer CIN
-224 J/kg
Mixed-layer LCL
660 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
79 m²/s²
0-3 km storm-relative helicity
437 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, Feb 20, 2:05 PM CST, 1 hour before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
205 PM CST MON FEB 20 1989

...STRONG THUNDERSTORMS DEVELOPING OVER SOUTHEAST MISSISSIPPI...

AT 200 PM CST THE MOBILE RADAR INDICATED A STRONG THUNDERSTORM ALONG
THE PEARL RIVER...ABOUT 15 MILES NORTHWEST OF PICAYUNE...IN PEARL-RIVER
COUNTY MISSISSIPPI.  THE THUNDERSTORM IS MOVING TOWARD THE NORTH-
NORTHEAST AT 30 MPH AND WILL PASS WEST OF POPLARVILLE DURING THE NEXT
HOUR.  IT WILL MOVE TO NEAR LUMBERTON IN LAMAR COUNTY BY 300 PM.

THIS THUNDERSTORM WILL CAUSE STRONG GUSTY WINDS...HEAVY RAINFALL...
DANGEROUS LIGHTNING AND POSSIBLY SOME HAIL.

OTHER STRONG THUNDERSTORMS DEVELOPING OVER SOUTHEAST LOUISIANA ARE
EXPECTED TO 0MOVE INTO SOUTHEAST MISSISSIPPI THIS AFTERNOON.  RESIDENTS
SHOULD REMAIN ALERT FOR WEATHER EVENTS THIS AFTERNOON.

SEVERE WEATHER MAY MOVE INTO THE AREA TONIGHT.

Nearby

Severe Thunderstorm Warnings in Mississippi, 1989Every severe thunderstorm warning in 1989

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.