Alert archive / Mississippi / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 20, NWS Mobile, AL
NWS Mobile, AL issued this severe thunderstorm warning at Apr 14, 1987, 2:30 AM CDT for Pearl River County, Mississippi. It was in force for 45 min.
The area
The counties it named.
The facts
- Issued
- Apr 14, 1987, 2:30 AM CDT (07:30 UTC)
- Expired
- Apr 14, 1987, 3:15 AM CDT
- In force
- 45 min
- Issued by
- NWS Mobile, AL
- Area
- Whole counties
County Pearl River 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 00:00Z, 7.5 hours before the alert went out and 161 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.
- Mixed-layer CAPE
- 225 J/kg
- Mixed-layer CIN
- -174 J/kg
- Mixed-layer LCL
- 780 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 355 m²/s²
- 0-3 km storm-relative helicity
- 342 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 3.6
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KMOB 140730
SVRMOB
MSC109-140815-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOBILE AL
230 AM CDT TUE APR 14 1987
THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING
EFFECTIVE UNTIL 315 AM CDT FOR PEOPLE IN THE FOLLOWING COUNTY...
IN SOUTHEAST MISSISSIPPI
...PEARL.RIVER
AT 226 AM A SEVERE THUNDERSTORM WAS INDICATED BY WEATHER SERVICE
RADARS 10 MILES NORTHWEST OF PICAYUNE MISSISSIPPI MOVING TOWARD THE
NORTHEAST AT 40 MPH. THE MOTION OF THIS STORM WILL TAKE IT NEAR
POPLARVILLE AROUND 245 AM. DAMAGING WINDS ARE LIKELY.
A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA. REMEMBER
SEVERE THUNDERSTORMS CAZN AND OCCASIONALLY DO PRODUCE TORNADOES
WITH LITTLE OR NO ADVANCE WARNING. REMAIN CALM BUT BE ALERT TO
RAPIDLY CHANGING WEATHER CONDITIONS.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 14, 1:15 AM CDT, 1 hour 15 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MOBILE AL 325 AM CDT TUE APR 14 1987 ...TORNADO WATCH NUMBER 64 IS IN EFFECT FOR ALL OF SOUTHWEST ALABAMA UNTIL 800 AM. THE WATCH IS NO LONGER IN EFFECT FOR ANY SOUTHEAST MISSISSIPPI COUNTY... THE SEVERE THUNDERSTORN WARNING FOR PEARL-RIVER COUNTY MISSISSIPPI EXPIRED AT 315 AM. THE MOBILE RADAR AT 320 AM INDICATED THAT THUNDERSTORM ACTIVITY HAD WEAKENED OVER SOUTHEAST MISSISSIPPI DURING THE PAST HALF HOUR. THE STRONGEST STORM WAS MOVING INTO STONE COUNTY AND CONTINUING NORTHEAST AT 40 MPH. RESIDENTS IN ALL SOUTHWEST ALABAMA COUNTIES SHOULD REMAIN ALERT FOR THE POSSIBILITY OF SEVERE WEATHER THIS MORNING. THUNDERSTORMS DEVELOPING OVER 3THE MISSISSIPPI COASTAL WATERS WILL MOVE ASHORE OVER SOUTHWEST ALABAMA LATER THIS MORNING AND MAY BECOME QUITE INTENSE.
The office that day
Everything else NWS Mobile, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 14, 2:17 AM CDT | Tornado Warning | MOB | Lamar | 28 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.