Alert archive / Mississippi / Severe Thunderstorm Watches in 2000

Severe Thunderstorm Watch 201

April 23, 2000Greene County, Sumter County, Alabama; 24 counties in Mississippi

The Storm Prediction Center issued this severe thunderstorm watch at Apr 23, 2000, 10:45 PM CDT for Greene County, Sumter County, Alabama; 24 counties in Mississippi. It was in force for 4 hr.

The area

The outline as issued.

The facts

Issued: Apr 23, 2000, 10:45 PM CDT (03:45 UTC)
Expired: Apr 24, 2000, 3:00 AM CDT
In force: 4 hr
Issued by: the Storm Prediction Center

All 26 counties

Greene County, AL, Sumter County, AL, Adams County, MS, Claiborne County, MS, Clarke County, MS, Copiah County, MS, Covington County, MS, Franklin County, MS, Hinds County, MS, Jasper County, MS, Jefferson County, MS, Jefferson Davis County, MS, Jones County, MS, Kemper County, MS, Lauderdale County, MS, Lawrence County, MS, Leake County, MS, Lincoln County, MS, Madison County, MS, Neshoba County, MS, Newton County, MS, Rankin County, MS, Scott County, MS, Simpson County, MS, Smith County, MS, Yazoo County, MS

Warnings issued inside it

9 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

Issued	Product	Office	Counties	Lasted
Apr 23, 10:47 PM CDT	Tornado Warning	JAN	Adams	43 min
Apr 23, 10:57 PM CDT	Severe Thunderstorm Warning	JAN	Claiborne, Jefferson	48 min
Apr 23, 11:16 PM CDT	Severe Thunderstorm Warning	JAN	Franklin	44 min
Apr 23, 11:45 PM CDT	Severe Thunderstorm Warning	JAN	Copiah	45 min
Apr 24, 12:11 AM CDT	Severe Thunderstorm Warning	JAN	Lincoln	34 min
Apr 24, 12:30 AM CDT	Severe Thunderstorm Warning	JAN	Copiah	30 min
Apr 24, 12:36 AM CDT	Severe Thunderstorm Warning	JAN	Lawrence, Simpson	39 min
Apr 24, 1:15 AM CDT	Severe Thunderstorm Warning	JAN	Covington, Jefferson Davis, Simpson	30 min
Apr 24, 1:48 AM CDT	Severe Thunderstorm Warning	JAN	Jasper, Jones, Smith	42 min

The nearest sounding before it

Jackson, MS (KJAN), launched 00:00Z, 3.8 hours before the alert went out and 40 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 30 J/kg
Mixed-layer CIN: -213 J/kg
Mixed-layer LCL: 834 m above ground
0-6 km bulk shear: 66 kt
0-1 km storm-relative helicity: 396 m²/s²
0-3 km storm-relative helicity: 517 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

730 
WWUS9 KMKC 240331
SEL1  

SEL1  
MKC WW 240331
MSZ000-240800-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 201
STORM PREDICTION CENTER NORMAN OK
1031 PM CDT SUN APR 23 2000

THE STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

   CENTRAL AND SOUTHERN MISSISSIPPI                        

EFFECTIVE THIS SUNDAY NIGHT AND MONDAY MORNING FROM 1045 PM UNTIL
300 AM CDT.

HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE SEVERE THUNDERSTORM WATCH AREA IS ALONG AND 75 STATUTE MILES
EAST AND WEST OF A LINE FROM 55 MILES EAST SOUTHEAST OF NATCHEZ
MISSISSIPPI TO 45 MILES NORTH NORTHWEST OF MERIDIAN MISSISSIPPI.

REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
FAVORABLE FOR 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 198...WW 199...WW 200...

DISCUSSION...SQUALL LINE WITH EMBEDDED LEWPS/LOW AMPLITUDE BOWS
WILL AFFECT PARTS OF MS TONIGHT AS EXISTING ACTIVITY CONTINUES EWD
ACROSS THE MS RIVER BENEATH 60+ KT MID LEVEL JET...AND BEYOND
SURFACE-BASED INSTABILITY AXIS.

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 1 INCH.  EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS. 
A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 450.  MEAN STORM MOTION
VECTOR 27035.

...CORFIDI

325,0874 311,0891 311,0914 325,0902

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 24, 6:45 AM CDT	Tornado Watch	SPC	Coffee, Dale, Geneva, Henry, Houston	4 hr
Apr 24, 11:00 AM CDT	Tornado Watch	SPC	Geneva, Houston	5 hr
Apr 23, 8:00 PM CDT	Severe Thunderstorm Watch	SPC	Bolivar, Coahoma, Sunflower	6 hr
Apr 23, 8:00 PM CDT	Tornado Watch	SPC	Carroll, Holmes, Humphreys, Issaquena, Leflore, Montgomery and 4 more	6 hr
Apr 23, 9:30 PM CDT	Tornado Watch	SPC	Amite, Pike, Walthall, Wilkinson	6 hr
Apr 24, 1:15 AM CDT	Severe Thunderstorm Watch	SPC	George, Hancock, Harrison, Jackson, Pearl River, Stone	5 hr

Nearby

Severe Thunderstorm Watches in Mississippi, 2000 Severe Thunderstorm Watches in Alabama, 2000 Every severe thunderstorm watch in 2000

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.