Alert archive / Mississippi / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 220, NWS Jackson, MS
NWS Jackson, MS issued this severe thunderstorm warning at Dec 20, 1990, 4:30 PM CST for Attala County, Mississippi. It was in force for 30 min. 1 report came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Dec 20, 1990, 4:30 PM CST (22:30 UTC)
- Expired
- Dec 20, 1990, 5:00 PM CST
- In force
- 30 min
- Issued by
- NWS Jackson, MS
- Area
- Whole counties
County Attala County, MS
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Dec 20, 4:35 PM CST | Thunderstorm Wind 0 | Attala, MS |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.
The nearest sounding before it
Jackson, MS (KJAN), launched 12:00Z, 10.5 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 572 m above ground
- 0-6 km bulk shear
- 51 kt
- 0-1 km storm-relative helicity
- 137 m²/s²
- 0-3 km storm-relative helicity
- 188 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.6
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, Dec 20, 4:06 PM CST, 24 minutes before
MSZ009-012-202315- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MERIDIAN MS 406 PM CST THU DEC 20 1990 LATE THIS AFTERNOON INTENSE THUNDERSTORMS STARTED DEVELOPING IN CENTRAL MISSISSIPPI. THERE HAVE BEEN SEVERAL REPORTS OF POSSIBLE TORNADOES. AT 358 PM CST MERIDIAN WEATHER RADAR SHOWED AN INTENSE THUNDERSTORM IN KEMPER COUNTY 15 MILES WEST OF DE KALB MOVING NORTHEAST AT 40 MPH. WITH THIS MOVEMENT THE THUNDERSTORM SHOULD MOVE NEAR PREST&ON MISSISSIPPI. ALL IN EAST CENTRAL MISSISSIPPI SHOULD BE ALERT FOR THE THREAT OF SEVERE WEATHER THIS AFTERNOON AND EVENING.
The office that day
Everything else NWS Jackson, MS issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 20, 2:41 PM CST | Severe Thunderstorm Warning | JAN | Yazoo | 34 min |
| Dec 20, 2:58 PM CST | Tornado Warning | JAN | Yazoo | 32 min |
| Dec 20, 3:09 PM CST | Tornado Warning | JAN | Madison | 36 min |
| Dec 20, 3:47 PM CST | Tornado Warning | JAN | Copiah | 28 min |
| Dec 20, 4:16 PM CST | Tornado Warning | JAN | Hinds, Rankin | 29 min |
| Dec 20, 4:41 PM CST | Tornado Warning | JAN | Hinds | 49 min |
| Dec 20, 4:52 PM CST | Tornado Warning | JAN | Noxubee | 53 min |
| Dec 20, 4:58 PM CST | Tornado Warning | JAN | Rankin | 24 min |
| Dec 20, 5:01 PM CST | Severe Thunderstorm Warning | JAN | Choctaw | 44 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.