Alert archive / Mississippi / Severe Thunderstorm Warnings in 2020
Severe Thunderstorm Warning 401, NWS Jackson, MS
NWS Jackson, MS issued this severe thunderstorm warning at Sep 23, 2020, 4:15 PM CDT for Adams County, Franklin County, Mississippi. It was in force for 37 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Sep 23, 2020, 4:15 PM CDT (21:15 UTC)
- Expired
- Sep 23, 2020, 4:52 PM CDT
- In force
- 37 min
- Issued by
- NWS Jackson, MS
- Area
- Storm-based polygon
- Tornado
- Possible
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Adams County, MS, Franklin County, MS
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Sep 23, 2:37 PM CDT | Tornado Watch | SPC | 7 hr |
The nearest sounding before it
Jackson, MS (KJAN), launched 12:00Z, 9.3 hours before the alert went out and 136 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
- 729 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 134 m²/s²
- 0-3 km storm-relative helicity
- 148 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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.
NWS Jackson, MS wrote its last area forecast discussion before this severe thunderstorm warning went out at Sep 23, 1:12 PM CDT, 3 hours 3 minutes earlier.
Area forecast discussion, Sep 23, 1:12 PM CDT, 3 hours 3 minutes before
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</html>Hazardous weather outlook, Sep 23, 5:43 AM CDT, 10 hours 32 minutes before
Hazardous Weather Outlook National Weather Service Jackson MS 543 AM CDT Wed Sep 23 2020 ARZ074-075-MSZ018-031-038-039-044>046-049>052-055-056-232000- Ashley-Chicot-Bolivar-Lowndes-Winston-Noxubee-Leake-Neshoba- Kemper-Rankin-Scott-Newton-Lauderdale-Simpson-Smith- 543 AM CDT Wed Sep 23 2020 This hazardous weather outlook is for portions of southeast Arkansas, central Mississippi, and east central Mississippi. .DAY ONE...Today and Tonight... FLOODING THREAT...Limited TIMING...Today through Tonight Localized flash flooding is possible, particularly in low lying and urban areas. (https://www.weather.gov/images/jan/graphicast/1.png) .DAYS TWO THROUGH SEVEN...Thursday through Tuesday... Flash flooding will continue to be a concern across portions of the outlook area into Thursday afternoon. (https://www.weather.gov/images/jan/graphicast/1.png) Isolated severe thunderstorms are possible over mainly eastern portions of the outlook area Thursday afternoon. (https://www.weather.gov/images/jan/graphicast/3.png) .SPOTTER CALL TO ACTION STATEMENT... The activation of storm spotters, HAM radio operators, and emergency management personnel in support of severe weather operations may be needed for portions of the region Thursday. LAZ007>009-015-016-023-MSZ019-025>030-032>037-040>043-047-048- 232000- Morehouse-West Carroll-East Carroll-Richland-Madison LA- Franklin LA-Sunflower-Leflore-Grenada-Carroll-Montgomery-Webster- Clay-Choctaw-Oktibbeha-Washington-Humphreys-Holmes-Attala- Issaquena-Sharkey-Yazoo-Madison MS-Warren-Hinds- 543 AM CDT Wed Sep 23 2020 This hazardous weather outlook is for portions of northeast Louisiana, central Mississippi, north central Mississippi, and west central Mississippi. .DAY ONE...Today and Tonight... FLOODING THREAT...Elevated TIMING...Today through Tonight Areas of flash flooding are likely. Some roads could be flooded or closed. Minor river flooding is also possible. (https://www.weather.gov/images/jan/graphicast/1.png) .DAYS TWO THROUGH SEVEN...Thursday through Tuesday... Flash flooding will continue to be a concern across portions of the outlook area into Thursday afternoon. (https://www.weather.gov/images/jan/graphicast/1.png) Isolated severe thunderstorms are possible over mainly eastern portions of the outlook area Thursday afternoon. (https://www.weather.gov/images/jan/graphicast/3.png) .SPOTTER CALL TO ACTION STATEMENT... The activation of storm spotters, HAM radio operators, and emergency management personnel in support of severe weather operations is not expected through next Tuesday. LAZ024>026-MSZ053-054-059>061-232000- Catahoula-Tensas-Concordia-Claiborne-Copiah-Jefferson-Adams- Franklin MS- 543 AM CDT Wed Sep 23 2020 This hazardous weather outlook is for portions of northeast Louisiana, central Mississippi, and southwest Mississippi. .DAY ONE...Today and Tonight... FLOODING THREAT...Elevated TIMING...Today through Tonight SEVERE THUNDERSTORMS THREAT...Marginal TIMING...Today Areas of flash flooding are likely. Some roads could be flooded or closed. Minor river flooding is also possible. (https://www.weather.gov/images/jan/graphicast/1.png) Isolated severe thunderstorms are possible this afternoon and evening. Some thunderstorms could produce a brief tornado or two. (https://www.weather.gov/images/jan/graphicast/2.png) .DAYS TWO THROUGH SEVEN...Thursday through Tuesday... Flash flooding will continue to be a concern across portions of the outlook area into Thursday afternoon. (https://www.weather.gov/images/jan/graphicast/1.png) Isolated severe thunderstorms are possible over mainly eastern portions of the outlook area Thursday afternoon. (https://www.weather.gov/images/jan/graphicast/3.png) .SPOTTER CALL TO ACTION STATEMENT... The activation of storm spotters, HAM radio operators, and emergency management personnel in support of severe weather operations may be needed for portions of the region today. MSZ063-232000- Lawrence- 543 AM CDT Wed Sep 23 2020 This hazardous weather outlook is for portions of south central Mississippi. .DAY ONE...Today and Tonight... SEVERE THUNDERSTORMS THREAT...Marginal TIMING...Today Isolated severe thunderstorms are possible this afternoon and evening. Some thunderstorms could produce a brief tornado or two. (https://www.weather.gov/images/jan/graphicast/2.png) .DAYS TWO THROUGH SEVEN...Thursday through Tuesday... The probability for widespread hazardous weather is low. .SPOTTER CALL TO ACTION STATEMENT... The activation of storm spotters, HAM radio operators, and emergency management personnel in support of severe weather operations may be needed for portions of the region today. MSZ062-232000- Lincoln- 543 AM CDT Wed Sep 23 2020 This hazardous weather outlook is for portions of south central Mississippi. .DAY ONE...Today and Tonight... FLOODING THREAT...Limited TIMING...Today through Tonight SEVERE THUNDERSTORMS THREAT...Marginal TIMING...Today Localized flash flooding is possible, particularly in low lying and urban areas. (https://www.weather.gov/images/jan/graphicast/1.png) Isolated severe thunderstorms are possible this afternoon and evening. Some thunderstorms could produce a brief tornado or two. (https://www.weather.gov/images/jan/graphicast/2.png) .DAYS TWO THROUGH SEVEN...Thursday through Tuesday... Flash flooding will continue to be a concern across portions of the outlook area into Thursday afternoon. (https://www.weather.gov/images/jan/graphicast/1.png) Isolated severe thunderstorms are possible over mainly eastern portions of the outlook area Thursday afternoon. (https://www.weather.gov/images/jan/graphicast/3.png) .SPOTTER CALL TO ACTION STATEMENT... The activation of storm spotters, HAM radio operators, and emergency management personnel in support of severe weather operations may be needed for portions of the region today. MSZ057-058-064>066-072>074-232000- Jasper-Clarke-Jefferson Davis-Covington-Jones-Marion-Lamar- Forrest- 543 AM CDT Wed Sep 23 2020 This hazardous weather outlook is for portions of east central Mississippi, south central Mississippi, and southeast Mississippi. .DAY ONE...Today and Tonight... The probability for widespread hazardous weather is low. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday... Flash flooding will continue to be a concern across portions of the outlook area into Thursday afternoon. (https://www.weather.gov/images/jan/graphicast/1.png) Isolated severe thunderstorms are possible over mainly eastern portions of the outlook area Thursday afternoon. (https://www.weather.gov/images/jan/graphicast/3.png) .SPOTTER CALL TO ACTION STATEMENT... The activation of storm spotters, HAM radio operators, and emergency management personnel in support of severe weather operations may be needed for portions of the region Thursday. 19 && ...HAZARD LEGEND... *FLOODING* Extreme...Widespread and significant flooding is likely. Significant...Widespread flash flooding is likely and significant flooding is possible. Elevated...Areas of flash flooding likely. Limited...Localized flash flooding is possible. *SEVERE THUNDERSTORMS* High...Significant severe thunderstorms and tornadoes are likely with strong or violent tornadoes possible. Moderate...Significant severe thunderstorms and tornadoes are likely with strong tornadoes possible. Enhanced...Severe thunderstorms are likely and tornadoes are possible. Slight...Severe thunderstorms and tornadoes are possible. Marginal...Isolated severe thunderstorms are possible. ...USEFUL WEATHER WEB PAGES (URLS)... NWS JAN Home page... https://www.weather.gov/jan Stay Aware, Stay Safe NWS JAN Briefing Page... https://www.weather.gov/jan/safe Latest Weather Briefing... https://www.weather.gov/jan/weather_briefing Tropical page... https://www.weather.gov/srh/tropical?office=jan National Hurricane Center Home Page... https://www.nhc.noaa.gov/ Find NWS JAN on Facebook... https://www.facebook.com/NWSJacksonMS Follow NWS JAN on Twitter... @NWSJacksonMS Follow NWS JAN on Youtube... https://www.youtube.com/user/NWSJacksonMiss ...ADDITIONAL URLS FOR FLOODING ISSUES... Current Watches and Warnings... https://www.weather.gov/jan/safe_HeavyRain Observed Precipitation Images... https://www.weather.gov/jan/precipmaps River Forecast Center... https://www.weather.gov/lmrfc/ Significant River Flood Outlook... https://www.wpc.ncep.noaa.gov/nationalfloodoutlook/index.html Day 1 through 3 Excessive Rainfall... https://www.wpc.ncep.noaa.gov/qpf/excess_rain.shtml Excessive Rainfall Discussion... https://www.wpc.ncep.noaa.gov/discussions/qpferd.html Day 1 through 7 QPF... https://www.wpc.ncep.noaa.gov/qpf/qpf2.shtml QPF Discussion... https://www.wpc.ncep.noaa.gov/discussions/qpfpfd.html ...ADDITIONAL URLS FOR SEVERE WEATHER ISSUES... Storm Prediction Center (SPC)... https://www.spc.noaa.gov/ Meso Analysis... https://www.spc.noaa.gov/exper/mesoanalysis/ Day 1 through 3 Outlooks... https://www.spc.noaa.gov/products/outlook/ Storm Reports... https://www.spc.noaa.gov/climo/online/
In the hours before
Local storm report, Sep 23, 10:52 AM CDT, 5 hours 23 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE JACKSON MS
1052 AM CDT WED SEP 23 2020
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1038 AM FLASH FLOOD GREENVILLE 33.41N 91.06W
09/23/2020 WASHINGTON MS EMERGENCY MNGR
MODERATE STREET FLOODING IN DOWNTOWN
GREENVILLE.
&&
TWLocal storm report, Sep 23, 2:49 PM CDT, 1 hour 26 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE JACKSON MS
249 PM CDT WED SEP 23 2020
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0240 PM FLOOD 2 WSW MCMILLAN CORNER 33.38N 91.34W
09/23/2020 CHICOT AR EMERGENCY MNGR
SOME EARLIER FLASH FLOODING OF COUNTY ROADS
TO THE WEST AND NORTH OF LAKE VILLAGE HAD
SUBSIDED, BUT SOME STANDING WATER REMAINED
IN THE AREA.
&&
NFLocal storm report, Sep 23, 2:50 PM CDT, 1 hour 25 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE JACKSON MS
250 PM CDT WED SEP 23 2020
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1254 PM FLASH FLOOD 3 S GREENVILLE 33.37N 91.06W
09/23/2020 WASHINGTON MS PUBLIC
A REPORT OF STREET FLOODING IN THE
GREENVILLE AREA WAS RELAYED VIA MPING.
&&
NFLocal storm report, Sep 23, 2:52 PM CDT, 1 hour 23 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE JACKSON MS
252 PM CDT WED SEP 23 2020
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0240 PM FLOOD 2 E DERMOTT 33.53N 91.41W
09/23/2020 CHICOT AR EMERGENCY MNGR
EARLIER FLASH FLOODING IN THE DERMOTT AREA
HAD SUBSIDED, BUT WATER REMAINED ON A FEW
ROADS IN AND NEAR DERMOTT AS WATER WAS
DRAINING.
&&
NFLocal storm report, Sep 23, 2:56 PM CDT, 1 hour 19 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE JACKSON MS
256 PM CDT WED SEP 23 2020
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0245 PM FLOOD HAMBURG 33.23N 91.80W
09/23/2020 ASHLEY AR EMERGENCY MNGR
EARLIER FLASH FLOODING IN THE HAMBURG AREA
HAD SUBSIDED, BUT WATER WAS SLOW TO DRAIN
OFF FROM A FEW ROADS IN THE AREA.
&&
NFLocal storm report, Sep 23, 3:08 PM CDT, 1 hour 7 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE JACKSON MS
308 PM CDT WED SEP 23 2020
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0300 PM FLOOD 1 SE GREENVILLE 33.40N 91.05W
09/23/2020 WASHINGTON MS EMERGENCY MNGR
EARLIER STREET FLOODING IN THE GREENVILLE
AREA WAS SUBSIDING, ALTHOUGH DITCHES
REMAINED FULL TO NEAR THE TOP AS WATER WAS
DRAINING OFF.
&&
NFThe office that day
Everything else NWS Jackson, MS issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 23, 3:56 AM CDT | Flash Flood Watch | JAN | Adams, Attala, Bolivar, Carroll, Choctaw, Claiborne and 27 more | 30 hr |
| Sep 23, 6:53 AM CDT | Flash Flood Warning | JAN | Bolivar, Sunflower, Washington | 3 hr |
| Sep 23, 10:14 AM CDT | Flash Flood Warning | JAN | Bolivar, Sunflower, Washington | 2 hr |
| Sep 23, 12:15 PM CDT | Flash Flood Warning | JAN | Bolivar, Sunflower, Washington | 3 hr |
| Sep 23, 3:00 PM CDT | Severe Thunderstorm Warning | JAN | Adams | 60 min |
| Sep 23, 3:14 PM CDT | Tornado Warning | JAN | Adams | 61 min |
| Sep 23, 5:23 PM CDT | Flash Flood Warning | JAN | Adams, Jefferson | 3 hr |
| Sep 23, 5:39 PM CDT | Severe Thunderstorm Warning | JAN | Adams, Franklin, Jefferson | 26 min |
Nearby
Severe Thunderstorm Warnings in Mississippi, 2020Every severe thunderstorm warning in 2020
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.