Alert archive / Mississippi / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 13, NWS Jackson, MS
NWS Jackson, MS issued this severe thunderstorm warning at Apr 13, 1987, 5:15 PM CDT for Issaquena County, Mississippi. It was in force for 45 min.
The area
The counties it named.
The facts
- Issued
- Apr 13, 1987, 5:15 PM CDT (22:15 UTC)
- Expired
- Apr 13, 1987, 6:00 PM CDT
- In force
- 45 min
- Issued by
- NWS Jackson, MS
- Area
- Whole counties
County Issaquena 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
Jackson, MS (KJAN), launched 12:00Z, 10.3 hours before the alert went out and 97 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
- 750 J/kg
- Mixed-layer CIN
- -132 J/kg
- Mixed-layer LCL
- 620 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- 44 m²/s²
- 0-3 km storm-relative helicity
- 96 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KJAN 132212
SVRJAN
MSC055-132300-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE JACKSON MS
515 PM CDT MON APR 13 1987
THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING
EFFECTIVE UNTIL 600 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTY...
IN WEST CENTRAL MISSISSIPPI
...ISSAQUENA
A LINE OF SEVERE THUNDERSTORMS IS MOVING ACROSS THE MISSISSIPPI
RIVER. THESE STORMS ARE PRODUCING LARGE HAIL, DAMAGING WINDS AND
FREQUENT LIGHTNING.
A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA. REMEMBER
SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES
WITH LITTLE OR NO ADVANCE WARNING. REMAIN CALM BUT BE ALERT TO
RAPIDLY CHANGING WEATHER CONDITIONS.
WHEN THUNDERSTORMS ARE OCCURRING...PEOPLE SHOULD MOVE INSIDE A
STRONG BUILDING. DO NOT STAND BY WINDOWS. DON'T USE TELEPHONES
OR ELECTRICAL APPLIANCES UNLESS IN AN EMERGENCY UNTIL THE STORM
HAS PASSED. MOTORISTS SHOULD NOT DRIVE INTO LOW WATER CROSSINGS.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 13, 1:01 PM CDT, 4 hours 14 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE JACKSON MS 100 PM CDT MON APR 13 1987 ...INTENSE THUNDERSTORMS POSSIBLE OVER MISSISSIPPI LATE THIS AFTERNOON AND TONIGHT... A STRONG LOW PRESSURE SYSTEM CONTINUES TO INTENSIFY OVER SOUTHEAST KANSAS EARLY THIS AFTERNOON...WITH A COLD FRONT TRAILING SOUTH ACROSS EAST OKLAHOMA AND EAST TEXAS. BRISK SOUTHERLY WINDS AHEAD OF THIS LOW CONTINUE TO PUMP MOIST AND UNSTABLE AIR INTO THE MID SOUTH...SETTING THE STAGE FOR POSSIBLE SEVERE WEATHER. SCATTERED VERY HEAVY THUNDERSTORMS HAVE ALREADY DEVELOPED OVER A LARGE PORTION OF MISSISSIPPI AND WILL CONTINUE TO INCREASE DURING THE AFTERNOON. AT THE CURRENT TIME...THE MAJOR THREAT OF SEVERE WEATHER IS OVER ARKANSAS AND LOUISIANA. AND TORNADO WATCHES REMAIN IN EFFECT FOR LARGE PORTIONS OF LOUISIANA AND ARKANSAS THIS AFTERNOON. PERSONS IN MISSISSIPPI ARE ADVISED TO REMAIN WEATHER CONSCIOUS THIS AFTERNOON AND TONIGHT...AND STAY TUNED FOR LATER STATEMENTS.
Special weather statement, Apr 13, 3:22 PM CDT, 1 hour 53 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
320 PM CDT MON APR 13 1987
...THUNDERSTORMS INCREASING OVER MISSISSIPPI...
SHOWERS AND SCATTERED HEAVY THUNDERSTORMS ARE CONTINUING TO INCREASE
ACROSS ALL OF MISSISSIPPI. AT 315 PM THE HEAVIEST STORMS WERE JUST
ACROSS THE MISSISSIPPI RIVER FROM GREENVILLE TO VICKSBURG. THESE WILL
MOVE NORTHEAST INTO THE STATE DURING THE NEXT HOUR. RESIDENTS OF THE
WESTERN COUNTIES CAN EXPECT MARBLE-SIZED HAIL...STRONG GUSTY WINDS AND
FREQUENT LIGHTNING. REMEMBER...LIGHTNING IS A KILLER. GET INSIDE WHEN
A THUNDERSTORM IS AROUND.
ANOTHER LINE OF VERY HEAVY THUNDERSTORMS IS MOVING THROUGH LOUISIANA
AND WILL ARRIVE AFTER DARK.
WATfCHES WILL LIKELY BE REQUIRED FOR MUCH OF THE STATE BEFORE THE NIGHT
IS OVER.
PERSONS IN MISSISSIPPI ARE ADVISED TO REMAIN WEATHER CONSCIOUS THIS
AFTERNOON AND EVENING...AND STAY TUNED FOR LATER STATEMENTS.Special weather statement, Apr 13, 4:13 PM CDT, 1 hour 2 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE JACKSON MS 415 PM CDT MON APR 13 1987 A BROKEN LINE OF VERY HEAVY THUNDERSTORMS IS CURRENTLY MOVING INTO WESTERN MISSISSIPPI. THE LINE EXTENDS FROM NEAR CLEVELAND TO JUST WEST OF FAYETTE. AT 415 PM THE HEAVIEST ACTIVITY WAS IN BOLIVAR COUNTY MOVING NORTH AT 35 MPH. RESIDENTS OF THE WESTERN COUNTIES CAN EXPECT MARBLE-SIZED HAIL... STRONG GUSTY WINDS AND FREQUENT LIGHTNING. REMEMBER...LIGHTNING IS A KILLER. GET INSIDE WHEN A THUNDERSTORM IS AROUND. THE MAIN LINE OF THUNDERSTORMS ASSOCIATED WITH THE COLD FRONT IS MOVING RAPIDLY THROUGH LOUISIANA AND WILL BE IN MISSISSIPPI BEFORE DARK. MISSISSIPPIANS SHOULD REMAIN WEATHER CONSCIOUS TONIGHT AND LISTEN FOR LATE STATEMENTS AND POSSIBLE WARNINGS.
The office that day
Everything else NWS Jackson, MS issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 13, 4:57 PM CDT | Severe Thunderstorm Warning | JAN | Washington | 48 min |
| Apr 13, 5:22 PM CDT | Severe Thunderstorm Warning | JAN | Bolivar | 23 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.