Alert archive / Mississippi / Severe Thunderstorm Warnings in 2023
Severe Thunderstorm Warning 531, NWS Jackson, MS
NWS Jackson, MS issued this severe thunderstorm warning at Jul 29, 2023, 4:08 PM CDT for Simpson County, Mississippi. It was in force for 33 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
- Jul 29, 2023, 4:08 PM CDT (21:08 UTC)
- Expired
- Jul 29, 2023, 4:41 PM CDT
- In force
- 33 min
- Issued by
- NWS Jackson, MS
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
County Simpson County, MS
The radar
The Jackson/Brandon,MS radar (KDGX), 41 km from the middle of the area, began a volume at 21:09 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.
The nearest sounding before it
Jackson, MS (KJAN), launched 12:00Z, 9.1 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
- 1072 J/kg
- Mixed-layer CIN
- -119 J/kg
- Mixed-layer LCL
- 1334 m above ground
- 0-6 km bulk shear
- 11 kt
- 0-1 km storm-relative helicity
- -76 m²/s²
- 0-3 km storm-relative helicity
- -63 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 Jul 29, 3:04 PM CDT, 1 hour 4 minutes earlier.
Area forecast discussion, Jul 29, 3:04 PM CDT, 1 hour 4 minutes before
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</html>Hazardous weather outlook, Jul 29, 2:48 PM CDT, 1 hour 20 minutes before
Hazardous Weather Outlook National Weather Service Jackson MS 248 PM CDT Sat Jul 29 2023 ARZ074-075-LAZ007>009-015-016-023>026-MSZ040-041-047-048-053>055- 059>064-072-302000- Ashley-Chicot-Morehouse-West Carroll-East Carroll-Richland- Madison LA-Franklin LA-Catahoula-Tensas-Concordia-Issaquena- Sharkey-Warren-Hinds-Claiborne-Copiah-Simpson-Jefferson-Adams- Franklin MS-Lincoln-Lawrence-Jefferson Davis-Marion- 248 PM CDT Sat Jul 29 2023 This hazardous weather outlook is for portions of southeast Arkansas, northeast Louisiana, central Mississippi, south central Mississippi, southwest Mississippi, and west central Mississippi. .DAY ONE...Tonight and Sunday DANGEROUS HEAT THREAT...Elevated TIMING...Sunday Sunday, elevated heat stress levels are expected with peak heat index values ranging from 105 to 110 degrees. Heat exhaustion will be likely with outdoor activity. (https://www.weather.gov/images/jan/graphicast/1.png) .DAYS TWO THROUGH SEVEN...Sunday night through Friday Elevated heat stress remains possible with peak heat index values ranging from 105 to 110 degrees each day. Heat exhaustion will be likely with prolonged outdoor activity. (https://www.weather.gov/images/jan/graphicast/1.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 Friday. MSZ018-019-025>039-042>046-049>052-056>058-065-066-073-074-302000- Bolivar-Sunflower-Leflore-Grenada-Carroll-Montgomery-Webster-Clay- Lowndes-Choctaw-Oktibbeha-Washington-Humphreys-Holmes-Attala- Winston-Noxubee-Yazoo-Madison MS-Leake-Neshoba-Kemper-Rankin- Scott-Newton-Lauderdale-Smith-Jasper-Clarke-Covington-Jones-Lamar- Forrest- 248 PM CDT Sat Jul 29 2023 This hazardous weather outlook is for portions of central Mississippi, east central Mississippi, north central Mississippi, and southeast Mississippi. .DAY ONE...Tonight and Sunday SEVERE THUNDERSTORMS THREAT...Marginal TIMING...Sunday DANGEROUS HEAT THREAT...Elevated TIMING...Sunday Sunday, elevated heat stress levels are expected with peak heat index values ranging from 105 to 110 degrees. Heat exhaustion will be likely with outdoor activity. (https://www.weather.gov/images/jan/graphicast/1.png) Isolated severe thunderstorms are possible Sunday mainly during peak heating hours with the main threats being damaging wind gusts. (https://www.weather.gov/images/jan/graphicast/2.png) .DAYS TWO THROUGH SEVEN...Sunday night through Friday Elevated heat stress remains possible with peak heat index values ranging from 105 to 110 degrees each day. Heat exhaustion will be likely with prolonged outdoor activity. (https://www.weather.gov/images/jan/graphicast/1.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 Sunday. 14 && ...HAZARD LEGEND... *DANGEROUS HEAT* Extreme...Extreme heat is expected with peak heat index values in excess of 110 degrees for multiple days. Heat stroke continues to be a major concern. Significant...Dangerous heat expected with peak heat index values in excess of 110 degrees. Heat stroke will be a significant concern. Elevated...Dangerous heat likely with peak heat index values ranging from 106 to 110 degrees. Heat exhaustion will be likely. Limited...Caution is advised for possible dangerous heat as heat index values peak near 105 degrees. Heat exhaustion will be 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 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
Special weather statement, Jul 29, 3:31 PM CDT, 37 minutes before
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</html>Special weather statement, Jul 29, 3:48 PM CDT, 20 minutes before
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</html>The office that day
Everything else NWS Jackson, MS issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 28, 8:09 PM CDT | Special Weather Statement | JAN | Franklin | 51 min |
| Jul 29, 2:36 PM CDT | Special Weather Statement | JAN | Smith | 24 min |
| Jul 29, 2:56 PM CDT | Heat Advisory | JAN | Adams, Attala, Bolivar, Carroll, Choctaw, Claiborne and 41 more | 29 hr |
| Jul 29, 3:02 PM CDT | Special Weather Statement | JAN | Scott | 28 min |
| Jul 29, 3:10 PM CDT | Special Weather Statement | JAN | Rankin | 35 min |
| Jul 29, 3:31 PM CDT | Special Weather Statement | JAN | Smith | 29 min |
| Jul 29, 3:41 PM CDT | Special Weather Statement | JAN | Yazoo | 34 min |
| Jul 29, 3:48 PM CDT | Special Weather Statement | JAN | Rankin | 27 min |
| Jul 29, 3:51 PM CDT | Special Weather Statement | JAN | Jefferson Davis | 24 min |
| Jul 29, 4:03 PM CDT | Special Weather Statement | JAN | Simpson | 27 min |
| Jul 29, 4:13 PM CDT | Special Weather Statement | JAN | Scott | 32 min |
| Jul 29, 4:15 PM CDT | Special Weather Statement | JAN | Leake | 30 min |
| Jul 29, 4:33 PM CDT | Special Weather Statement | JAN | Lincoln | 27 min |
| Jul 29, 4:39 PM CDT | Special Weather Statement | JAN | Madison | 36 min |
| Jul 29, 4:43 PM CDT | Special Weather Statement | JAN | Lawrence | 32 min |
| Jul 29, 4:50 PM CDT | Special Weather Statement | JAN | Franklin | 25 min |
| Jul 29, 4:52 PM CDT | Special Weather Statement | JAN | Madison | 23 min |
| Jul 29, 5:21 PM CDT | Special Weather Statement | JAN | Lincoln | 24 min |
| Jul 29, 3:07 PM CDT | Special Weather Statement | JAN | East Carroll | 23 min |
| Jul 29, 3:45 PM CDT | Special Weather Statement | JAN | Madison | 30 min |
Nearby
Severe Thunderstorm Warnings in Mississippi, 2023Every severe thunderstorm warning in 2023
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.