Alert archive / Mississippi / Severe Thunderstorm Watches in 2003
Severe Thunderstorm Watch 849
The Storm Prediction Center issued this severe thunderstorm watch at Aug 6, 2003, 7:45 PM CDT for Choctaw County, Mobile County, Washington County, Alabama; 36 counties in Mississippi. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 6, 2003, 7:45 PM CDT (00:45 UTC)
- Expired
- Aug 7, 2003, 1:00 AM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
All 39 counties
Choctaw County, AL, Mobile County, AL, Washington County, AL, Attala County, MS, Carroll County, MS, Choctaw County, MS, Clarke County, MS, Covington County, MS, Forrest County, MS, George County, MS, Greene County, MS, Hancock County, MS, Harrison County, MS, Holmes County, MS, Jackson County, MS, Jasper County, MS, Jefferson Davis County, MS, Jones County, MS, Kemper County, MS, Lamar County, MS, Lauderdale County, MS, Leake County, MS, Leflore County, MS, Madison County, MS, Marion County, MS, Montgomery County, MS, Neshoba County, MS, Newton County, MS, Noxubee County, MS, Oktibbeha County, MS, Pearl River County, MS, Perry County, MS, Rankin County, MS, Scott County, MS, Simpson County, MS, Smith County, MS, Stone County, MS, Wayne County, MS, Winston County, MS
Warnings issued inside it
12 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 6, 7:48 PM CDT | Severe Thunderstorm Warning | MOB | Mobile | 57 min |
| Aug 6, 7:53 PM CDT | Severe Thunderstorm Warning | JAN | Scott | 62 min |
| Aug 6, 8:12 PM CDT | Severe Thunderstorm Warning | JAN | Smith | 43 min |
| Aug 6, 8:16 PM CDT | Severe Thunderstorm Warning | MOB | George | 29 min |
| Aug 6, 8:34 PM CDT | Severe Thunderstorm Warning | JAN | Jefferson Davis | 46 min |
| Aug 6, 8:45 PM CDT | Severe Thunderstorm Warning | JAN | Covington | 45 min |
| Aug 6, 8:56 PM CDT | Severe Thunderstorm Warning | JAN | Madison | 39 min |
| Aug 6, 9:16 PM CDT | Severe Thunderstorm Warning | JAN | Rankin | 74 min |
| Aug 6, 9:24 PM CDT | Severe Thunderstorm Warning | JAN | Lamar | 76 min |
| Aug 6, 10:30 PM CDT | Severe Thunderstorm Warning | JAN | Rankin | 60 min |
| Aug 6, 11:24 PM CDT | Severe Thunderstorm Warning | JAN | Simpson | 61 min |
| Aug 7, 12:41 AM CDT | Flash Flood Warning | JAN | Rankin | 119 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Jackson, MS (KJAN), launched 00:00Z, 0.8 hours before the alert went out and 103 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
- 4421 J/kg
- Mixed-layer CIN
- -4 J/kg
- Mixed-layer LCL
- 1023 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 67 m²/s²
- 0-3 km storm-relative helicity
- 157 m²/s²
- Significant tornado parameter
- 2.4
- Supercell composite
- 11.7
The text
As transmitted, in the capitals the NWS used until 2016.
000
WWUS20 KWNS 070042
SEL9
SPC WW 070045
ALZ000-MSZ000-CWZ000-070600-
URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 849
NWS STORM PREDICTION CENTER NORMAN OK
745 PM CDT WED AUG 6 2003
THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
SOUTHWEST ALABAMA
CENTRAL AND SOUTHERN MISSISSIPPI
COASTAL WATERS
EFFECTIVE THIS WEDNESDAY NIGHT AND THURSDAY MORNING FROM 745 PM
UNTIL 100 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 55 STATUTE MILES
EAST AND WEST OF A LINE FROM 30 MILES EAST NORTHEAST OF GREENWOOD
MISSISSIPPI TO 30 MILES EAST SOUTHEAST OF GULFPORT 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. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE
TORNADOES.
OTHER WATCH INFORMATION...THIS SEVERE THUNDERSTORM WATCH REPLACES
SEVERE THUNDERSTORM WATCH NUMBER 847. WATCH NUMBER 847 WILL NOT BE
IN EFFECT AFTER 745 PM CDT. CONTINUE...WW 846...WW 847...WW 848...
DISCUSSION...VERY UNSTABLE AIR MASS ON 00Z JAN SOUNDING ALONG WITH
MDT NWLY FLOW REGIME WILL CONTINUE THREAT OF MAINLY DAMAGING WINDS
AS CLUSTERS OF STORMS TRACK SEWD ACROSS MS TOWARD GULF COAST
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 550. MEAN STORM MOTION
VECTOR 33025.
...HALES
333,0883 301,0874 301,0893 333,0903
WWUS20 KWNS 070042
SEL9
SPC WW 070045
ALZ000-MSZ000-CWZ000-070600-
URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 849
NWS STORM PREDICTION CENTER NORMAN OK
745 PM CDT WED AUG 6 2003
THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
SOUTHWEST ALABAMA
CENTRAL AND SOUTHERN MISSISSIPPI
COASTAL WATERS
EFFECTIVE THIS WEDNESDAY NIGHT AND THURSDAY MORNING FROM 745 PM
UNTIL 100 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 55 STATUTE MILES
EAST AND WEST OF A LINE FROM 30 MILES EAST NORTHEAST OF GREENWOOD
MISSISSIPPI TO 30 MILES EAST SOUTHEAST OF GULFPORT 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. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE
TORNADOES.
OTHER WATCH INFORMATION...THIS SEVERE THUNDERSTORM WATCH REPLACES
SEVERE THUNDERSTORM WATCH NUMBER 847. WATCH NUMBER 847 WILL NOT BE
IN EFFECT AFTER 745 PM CDT. CONTINUE...WW 846...WW 847...WW 848...
DISCUSSION...VERY UNSTABLE AIR MASS ON 00Z JAN SOUNDING ALONG WITH
MDT NWLY FLOW REGIME WILL CONTINUE THREAT OF MAINLY DAMAGING WINDS
AS CLUSTERS OF STORMS TRACK SEWD ACROSS MS TOWARD GULF COAST
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 550. MEAN STORM MOTION
VECTOR 33025.
...HALES
333,0883 301,0874 301,0893 333,0903SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 6, 9:34 PM CDT | Mesoscale Discussion | SPC | Choctaw, Mobile, Washington | 86 min |
| Aug 7, 12:38 AM CDT | Mesoscale Discussion | SPC | Clarke, Copiah, Covington, Hinds, Jasper, Jefferson Davis and 9 more | 37 min |
Nearby
Severe Thunderstorm Watches in Mississippi, 2003Severe Thunderstorm Watches in Alabama, 2003Every severe thunderstorm watch in 2003
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.