Alert archive / Mississippi / Tornado Watches in 1998
Tornado Watch 236
The Storm Prediction Center issued this tornado watch at Apr 16, 1998, 6:30 PM CDT for Choctaw County, Greene County, Sumter County, Alabama; 28 counties in Mississippi. It was in force for 4 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 16, 1998, 6:30 PM CDT (23:30 UTC)
- Expired
- Apr 16, 1998, 10:00 PM CDT
- In force
- 4 hr
- Issued by
- the Storm Prediction Center
All 31 counties
Choctaw County, AL, Greene County, AL, Sumter County, AL, Amite County, MS, Claiborne County, MS, Clarke County, MS, Copiah County, MS, Covington County, MS, Forrest County, MS, Franklin County, MS, Hinds County, MS, Jasper County, MS, Jefferson County, MS, Jefferson Davis County, MS, Jones County, MS, Kemper County, MS, Lamar County, MS, Lauderdale County, MS, Lawrence County, MS, Leake County, MS, Lincoln County, MS, Madison County, MS, Marion County, MS, Neshoba County, MS, Newton County, MS, Rankin County, MS, Scott County, MS, Simpson County, MS, Smith County, MS, Wayne County, MS, Yazoo County, MS
The nearest sounding before it
Jackson, MS (KJAN), launched 12:00Z, 11.5 hours before the alert went out and 48 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
- 971 J/kg
- Mixed-layer CIN
- -107 J/kg
- Mixed-layer LCL
- 593 m above ground
- 0-6 km bulk shear
- 65 kt
- 0-1 km storm-relative helicity
- 418 m²/s²
- 0-3 km storm-relative helicity
- 464 m²/s²
- Significant tornado parameter
- 2.1
- Supercell composite
- 5.7
The text
As transmitted, in the capitals the NWS used until 2016.
118 WWUS9 KMKC 162309 SEL6 MKC WW 162309 MSZ000-ALZ000-170300- BULLETIN - IMMEDIATE BROADCAST REQUESTED TORNADO WATCH NUMBER 236 STORM PREDICTION CENTER NORMAN OK 609 PM CDT THU APR 16 1998 THE STORM PREDICTION CENTER HAS ISSUED A TORNADO WATCH FOR PORTIONS OF CENTRAL AND SOUTHERN MISSISSIPPI WEST CENTRAL ALABAMA EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 630 PM UNTIL 1000 PM CDT. TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS. THE TORNADO WATCH AREA IS ALONG AND 80 STATUTE MILES EAST AND WEST OF A LINE FROM 25 MILES EAST OF MC COMB MISSISSIPPI TO 50 MILES NORTH NORTHWEST OF MERIDIAN MISSISSIPPI. REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS. OTHER WATCH INFORMATION... CONTINUE...WW 229...WW 231...WW 232...WW 233...WW 234...WW 235... DISCUSSION...STRONG THUNDERSTORMS ARE DEVELOPING WITHIN UNSTABLE AIR MASS OVER SOUTHERN MISSISSIPPI /LIFTED INDEX TO -8/. VAD WINDS FROM JAN SHOW VERY STRONG DEEP LAYER SHEAR AND HELICITY AROUND 200- 250 M2/S2 INDICATING POTENTIAL FOR SUPERCELLS TO FORM. AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 480. MEAN STORM MOTION VECTOR 25040. ...WEISS 311,0912 330,0902 330,0874 311,0884
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 16, 10:00 AM CDT | Tornado Watch | SPC | Lauderdale | 6 hr |
| Apr 16, 4:00 PM CDT | Tornado Watch | SPC | Colbert, Cullman, Fayette, Franklin, Jackson, Lamar and 10 more | 6 hr |
| Apr 16, 7:30 AM CDT | Severe Thunderstorm Watch | SPC | DeSoto, Marshall, Tate, Tunica | 6 hr |
Nearby
Tornado Watches in Mississippi, 1998Tornado Watches in Alabama, 1998Every tornado watch in 1998
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.