Alert archive / Mississippi / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 73, NWS Jackson, MS
NWS Jackson, MS issued this severe thunderstorm warning at Apr 1, 1990, 12:05 PM CDT for Yazoo County, Mississippi. It was in force for 40 min.
The area
The counties it named.
The facts
- Issued
- Apr 1, 1990, 12:05 PM CDT (17:05 UTC)
- Expired
- Apr 1, 1990, 12:45 PM CDT
- In force
- 40 min
- Issued by
- NWS Jackson, MS
- Area
- Whole counties
County Yazoo 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, 5.1 hours before the alert went out and 59 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
- 718 J/kg
- Mixed-layer CIN
- -64 J/kg
- Mixed-layer LCL
- 742 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 10 m²/s²
- 0-3 km storm-relative helicity
- 37 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KJAN 011708 SVRJAN MSC163-011745- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE JACKSON MS 1205 PM CDT SUN APR 1 1990 THE NATIONAL WEATHER SERVICE IN JACKSON HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1245 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN CENTRAL MISSISSIPPI ...NORTHERN YAZOO COUNTY AT 1201 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM NEAR HOLLY BLUFF. THE STORM WAS MOVING TO THE EAST AT 30 MPH. SEVERE THUNDERSTORMS PRODUCE WIND IN EXCESS OF 55 MPH...LARGE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. <
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 1, 8:35 AM CDT, 3 hours 30 minutes before
MSZ001-002-003-004-006-008-011430- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE JACKSON MS 835 AM CST SUN APR 1 1990 ...AREA OF SHOWERS AND THUNDERSTORMS MOVING INTO THE DELTA... AN UPPER LEVEL DISTURBANCE MOVING EASTWARD OVER ARKANSAS HAS TRIGGERED AN AREA OF SHOWERS AND THUNDERSTORMS ACROSS NORTHERN LOUISIANA AND SOUTHERN ARKANSAS THIS MORNING. SOME OF THE SHOWERS HAVE ALREADY MOVED INTO PARTS OF NORTHWEST MISSISSIPPI. AT 830 AM...SHOWERS WERE INDICATED OVER BOLIVAR COUNTY...MAINLY WEST OF CLEVELAND. JACKSON RADAR INDICATED THE STRONGEST THUNDERSTORM WAS STILL OVER SOUTHEAST ARKANSAS NEAR MONTICELLO. OTHER SHOWERS AND THUNDER- STORMS EXTENDED BACK TO THE SOUTHWEST OVER NORTHWEST LOUISIANA. MOVEMENT WAS TO THE EAST AT 25 MILES AN HOUR...AND CONSEQUENTLY PERIODS OF WET WEATHER CAN BE EXPECTED OVER PARTS OF NORTHWEST MISSISSIPPI THIS MORNING. SOME OF THE STRONGER THUNDERSTORMS WILL BE CAPABLE OF STRONGx GUSTY WINDS...OCCASIONAL LIGHTNING...AND SMALL HAIL.
Special weather statement, Apr 1, 9:41 AM CDT, 2 hours 24 minutes before
MSZ001-002-003-004-006-008-011545- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE JACKSON MS 938 AM CDT SUN APR 1 1990 ...THUNDERSTORMS GETTING CLOSER TO THE DELTA... AT 935 AM CDT...AN AREA OF MOSTLY LIGHT SHOWERS WAS INDICATED OVER NORTHWEST MISSISSIPPI FROM ABOUT CHARLESTON...WEST TO CLEVELAND...AND SOUTHWEST TO JUST NORTH OF GREENVILLE. HOWEVER...INTENSE THUNDERSTORMS...WITH A HISTORY OF PRODUCING DIME SIZE HAIL...WERE STILL LOCATED OVER SOUTHEAST ARKANSAS. THE TWO STRONGEST STORMS OVER SOUTHEAST ARKANSAS WERE NEAR DERMOTT AND WEST OF HAMBURG. THE LEADING THUNDERSTORM WAS LESS THAN 20 MILES WEST OF THE MISSISSIPPI RIVER...NORTHWEST OF GREENVILLE. THESE THUNDERSTORMS ARE EXPECTED TO REMAIN QUITE STRONG FOR AT LEAST THE NEXT COUPLE OF HOURS...AS THE AIRMASS OVER THE REGION IS QUITE UNSTABLE. SEVERE THUNDERSTORM WARNINGS MAY BECOME NECESSARY FOR PARTS OF NORTHWEST MISSISSIPPI WITHIN THE NEXT HOUR OR TWO. MOVEMENT WAS EAST AT 35 MILES AN HOUR.
Special weather statement, Apr 1, 10:41 AM CDT, 1 hour 24 minutes before
MSZ001-002-003-004-005-006-007-008-009-010-011-011640- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE JACKSON MS 1037 AM CDT SUN APR 1 1990 ...INTENSE THUNDERSTORMS JUST WEST OF THE MISSISSIPPI RIVER... AT 1035 AM CDT...SEVERAL INTENSE THUNDERSTORMS WERE INDICATED OVER SOUTHEAST ARKANSAS AND NORTHEAST LOUISIANA. THE STRONGEST STORM WAS OVER SOUTHEAST ARKANSAS ABOUT 25 MILES SOUTHWEST OF GREENVILLE...AND WAS LIKELY PRODUCING STRONG GUSTY WINDS...FREQUENT LIGHTNING...HAIL...AND HEAVY DOWNPOURS. THE LEADING THUNDERSTORM WAS OVER NORTHEAST LOUISIANA ABOUT 20 MILES NORTHWEST OF LAKE PROVIDENCE. SHOWERS CONTINUED TO INCREASE IN COVERAGE OVER SECTIONS OF NORTHWEST MISSISSIPPI GENERALLY NORTHWEST OF A ROLLING FORK TO GRENADA LINE. SEVERE THUNDERSTORM WARNINGS STILL MAY BECOME NECESSARY FOR PARTS OF NORTHWEST OR WEST-CENTRAL MISSISSIPPI LATE THIS MORNING. THE GREATEST THREAT APPEARS TO FROM LARGE HAIL. MOVEMENT WAS EAFST AT 35 MILES AN HOUR.
Special weather statement, Apr 1, 11:08 AM CDT, 57 minutes before
MSZ002-003-006-008-010-011-011640- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE JACKSON MS 1105 AM CDT SUN APR 1 1990 ...INTENSE THUNDERSTORMS JUST WEST OF THE MISSISSIPPI RIVER... AT 1100 AM CDT...SEVERAL INTENSE THUNDERSTORMS WERE INDICATED OVER EXTREME SOUTHEAST ARKANSAS AND NORTHEAST LOUISIANA. THE STRONGEST STORMS WERE OVER NORTHEAST LOUISIANA...ABOUT 5 MILES WEST OF LAKE PROVIDENCE...AND 25 MILES NORTH OF MONROE. THESE STORMS WERE PRODUCING LARGE HAIL...STRONG GUSTY WINDS...CONTINUOUS CLOUD TO GROUND LIGHTNING...AND HEAVY DOWNPOURS. SEVERE THUNDERSTORM WARNINGS MAY BECOME NECESSARY FOR PARTS OF NORTHWEST OR WEST-CENTRAL MISSISSIPPI WITHIN THE NEXT HOUR. THE GREATEST THREaAT APPEARS TO BE LARGE HAIL. MOVEMENT WAS EAST AT 35 MILES AN HOUR.
Special weather statement, Apr 1, 11:41 AM CDT, 24 minutes before
MSZALL-011740- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE JACKSON MS 1140 AM CDT SUN APR 1 1990 ...STRONG THUNDERSTORMS OVER WEST-CENTRAL MISSISSIPPI... AT 1135 AM CDT...SEVERAL STRONG THUNDERSTORMS WERE INDICATED OVER WEST-CENTRAL MISSISSIPPI GENERALLY NORTHWEST OF YAZOO CITY. THE STRONGEST OF THESE STORMS WERE OVER SOUTHERN WASHINGTON COUNTY NEAR HOLLANDALE...AND OVER SOUTHERN HUMPREYS COUNTY SOUTH OF SILVER CITY. THESE STORMS WERE JUST BELOW SEVERE LIMITS...AND WERE PRODUCING HEAVY RAIN...GUSTY WINDS...FREQUENT LIGHTNING...AND SMALL HAIL. IF ANY OF THESE STORMS SHOW A SLIGHT INCREASE IN INTENSITY SOON... SEVERE THUNDERSTORM WARNINGS WILL BECOME NECESSARY. yANOTHER STRONG THUNDERSTORMS CONTINUED OVER NORTHEAST LOUISIANA 20 MILES WEST OF LAKE PROVIDENCE. MOVEMENT WAS EAST AT 35 MILES AN HOUR.
The office that day
Everything else NWS Jackson, MS issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 1, 12:22 PM CDT | Severe Thunderstorm Warning | JAN | Holmes | 38 min |
| Apr 1, 12:45 PM CDT | Severe Thunderstorm Warning | JAN | Hinds | 20 min |
| Apr 1, 2:20 PM CDT | Severe Thunderstorm Warning | JAN | Kemper | 25 min |
| Apr 1, 2:49 PM CDT | Severe Thunderstorm Warning | JAN | Kemper | 26 min |
| Apr 1, 2:52 PM CDT | Severe Thunderstorm Warning | JAN | Lauderdale | 53 min |
Nearby
Severe Thunderstorm Warnings in Mississippi, 1990Every severe thunderstorm warning in 1990
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.