Alert archive / Mississippi / Severe Thunderstorm Warnings in 1987

Severe Thunderstorm Warning 23, NWS Mobile, AL

May 4, 1987Hancock County, Mississippi

NWS Mobile, AL issued this severe thunderstorm warning at May 4, 1987, 2:55 PM CDT for Hancock County, Mississippi. It was in force for 65 min.

The area

The counties it named.

The facts

Issued
May 4, 1987, 2:55 PM CDT (19:55 UTC)
Expired
May 4, 1987, 4:00 PM CDT
In force
65 min
Issued by
NWS Mobile, AL
Area
Whole counties

County Hancock 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

Boothville, LA (KBVE), launched 12:00Z, 7.9 hours before the alert went out and 119 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, Boothville, LA at 12:00Z on 1987-05-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2099 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, Boothville, LA at 12:00Z on 1987-05-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -11 square meters per square second.1939Sfc1 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
2099 J/kg
Mixed-layer CIN
-35 J/kg
Mixed-layer LCL
729 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
-11 m²/s²
0-3 km storm-relative helicity
215 m²/s²
Significant tornado parameter
-0.0
Supercell composite
-0.2

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMOB 041957
SVRMOB
MSC045-042100-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOBILE AL
255 PM CDT MON MAY 4 1987

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM
WARNING EFFECTIVE UNTIL 400 PM CDT FOR PEOPLE IN THE FOLLOWING
COUNTIES OF

SOUTHEAST MISSISSIPPI...HANCOCK

AT 253 PM CDT RADAR AT MOBILE SHOWED A SEVERE THUNDERSTORM ON THE
MISSISSIPPI-LOUISIANA STATE BORDER JUST SOUTHEAST OF PEARL RIVER
LOUISIANA.  THIS STORM IS MOVING TO THE NORTH AT ABOUT 5 MPH.

LARGE HAIL AND DAMAGING WINDS ARE LIKELY WITH THIS STORM.

THIS STORM IS ACCOMPANIED BY INTENSE LIGHTNING AND STRONG GUSTY
 WINDS.

The office that day

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

IssuedProductOfficeCountiesLasted
May 4, 1:14 PM CDTSevere Thunderstorm WarningMOBHancock, Harrison, Stone46 min

Nearby

Severe Thunderstorm Warnings in Mississippi, 1987Every severe thunderstorm warning in 1987

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.