Alert archive / Mississippi / Tornado Watches in 2004
Tornado Watch 128
The Storm Prediction Center issued this tornado watch at Apr 29, 2004, 6:55 PM CDT for 11 counties in Mississippi. It was in force for 3 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 29, 2004, 6:55 PM CDT (23:55 UTC)
- Expired
- Apr 29, 2004, 10:00 PM CDT
- In force
- 3 hr
- Issued by
- the Storm Prediction Center
Counties Attala County, MS, Carroll County, MS, Choctaw County, MS, Hinds County, MS, Holmes County, MS, Leake County, MS, Madison County, MS, Montgomery County, MS, Warren County, MS, Webster County, MS, Yazoo County, MS
The radar
The Jackson/Brandon,MS radar (KDGX), 56 km from the middle of the area, began a volume at 23:58 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
Warnings issued inside it
15 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 29, 7:08 PM CDT | Severe Thunderstorm Warning | JAN | Holmes | 42 min |
| Apr 29, 7:27 PM CDT | Severe Thunderstorm Warning | JAN | Hinds | 78 min |
| Apr 29, 7:42 PM CDT | Severe Thunderstorm Warning | JAN | Warren | 43 min |
| Apr 29, 7:47 PM CDT | Tornado Warning | JAN | Yazoo | 43 min |
| Apr 29, 7:49 PM CDT | Severe Thunderstorm Warning | JAN | Attala | 46 min |
| Apr 29, 8:11 PM CDT | Tornado Warning | JAN | Hinds | 59 min |
| Apr 29, 8:28 PM CDT | Tornado Warning | JAN | Attala, Choctaw | 57 min |
| Apr 29, 8:31 PM CDT | Tornado Warning | JAN | Yazoo | 44 min |
| Apr 29, 8:37 PM CDT | Severe Thunderstorm Warning | JAN | Holmes | 58 min |
| Apr 29, 8:58 PM CDT | Severe Thunderstorm Warning | JAN | Holmes | 37 min |
| Apr 29, 9:11 PM CDT | Tornado Warning | JAN | Hinds, Rankin | 59 min |
| Apr 29, 9:12 PM CDT | Tornado Warning | JAN | Yazoo | 58 min |
| Apr 29, 9:36 PM CDT | Severe Thunderstorm Warning | JAN | Attala, Madison | 44 min |
| Apr 29, 9:48 PM CDT | Severe Thunderstorm Warning | JAN | Leake | 62 min |
| Apr 29, 9:53 PM CDT | Severe Thunderstorm Warning | JAN | Carroll | 27 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 12:00Z, 11.9 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1051 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 68 m²/s²
- 0-3 km storm-relative helicity
- 169 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
WWUS20 KWNS 292357
SEL8
SPC WW 292355
MSZ000-300300-
URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 128
NWS STORM PREDICTION CENTER NORMAN OK
655 PM CDT THU APR 29 2004
THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF
CENTRAL MISSISSIPPI
EFFECTIVE THIS THURSDAY EVENING FROM 655 PM UNTIL 1000 PM CDT.
TORNADOES...HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 65 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
THE TORNADO WATCH AREA IS ALONG AND 35 STATUTE MILES EAST AND WEST
OF A LINE FROM 45 MILES EAST NORTHEAST OF GREENWOOD MISSISSIPPI TO
40 MILES WEST SOUTHWEST OF JACKSON 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...THIS TORNADO WATCH REPLACES TORNADO
WATCH NUMBER 124. WATCH NUMBER 124 WILL NOT BE IN EFFECT AFTER 655
PM CDT. CONTINUE...WW 125...WW 126...WW 127...
DISCUSSION...SMALL SUPERCELLS EXPECTED TO PERSIST FOR ANOTHER COUPLE
HOURS OR SO OVER CNTRL/NRN MS...WHERE LOW LEVEL SHEAR WILL BE
MAXIMIZED INVOF NW/SE ORIENTED WARM FRONT. AREA VWP/PROFILER DATA
STILL SHOW SUFFICIENT DEEP SHEAR...ASSOCIATED WITH UPPER IMPULSE NOW
IN NE AR ...TO SUPPORT SUPERCELLS. STORMS SHOULD WEAKEN LATER THIS
EVENING...HOWEVER...AS GRADUAL DIURNAL STABILIZATION CONTINUES.
AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 55 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 400.
MEAN STORM MOTION VECTOR 24030.
...CORFIDI
334,0884 320,0900 320,0911 334,0895SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 29, 1:10 PM CDT | Tornado Watch | SPC | Humphreys, Issaquena, Leflore, Sharkey, Sunflower, Washington | 6 hr |
| Apr 29, 1:56 PM CDT | Mesoscale Discussion | SPC | Adams, Amite, Claiborne, Copiah, Covington, Forrest and 23 more | 2 hr |
| Apr 29, 2:44 PM CDT | Mesoscale Discussion | SPC | Washington | 2 hr |
| Apr 29, 3:15 PM CDT | Tornado Watch | SPC | George, Hancock, Harrison, Jackson, Stone | 6 hr |
| Apr 29, 5:36 PM CDT | Mesoscale Discussion | SPC | Adams, Carroll, Claiborne, Grenada, Holmes, Humphreys and 10 more | 84 min |
| Apr 29, 6:15 PM CDT | Mesoscale Discussion | SPC | George, Hancock, Harrison, Jackson, Pearl River, Stone | 90 min |
Nearby
Tornado Watches in Mississippi, 2004Every tornado watch in 2004
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; radar from the NEXRAD Level II archive.