Alert archive / Mississippi / Severe Thunderstorm Warnings in 2020
Severe Thunderstorm Warning 378, NWS Jackson, MS
NWS Jackson, MS issued this severe thunderstorm warning at Aug 12, 2020, 7:30 PM CDT for Madison County, Yazoo County, Mississippi. It was in force for 34 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
- Aug 12, 2020, 7:30 PM CDT (00:30 UTC)
- Expired
- Aug 12, 2020, 8:04 PM CDT
- In force
- 34 min
- Issued by
- NWS Jackson, MS
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Madison County, MS, Yazoo County, MS
The radar
The Jackson/Brandon,MS radar (KDGX), 52 km from the middle of the area, began a volume at 00:33 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 00:00Z, 0.5 hours before the alert went out and 45 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
- 275 J/kg
- Mixed-layer CIN
- -71 J/kg
- Mixed-layer LCL
- 1402 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 38 m²/s²
- 0-3 km storm-relative helicity
- 86 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.7
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 Aug 12, 6:22 PM CDT, 1 hour 8 minutes earlier.
Area forecast discussion, Aug 12, 6:22 PM CDT, 1 hour 8 minutes before
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Hazardous Weather Outlook National Weather Service Jackson MS 240 PM CDT Wed Aug 12 2020 ARZ074-075-LAZ007>009-015-016-023>026-MSZ018-019-025>066-072>074- 131945- Ashley-Chicot-Morehouse-West Carroll-East Carroll-Richland- Madison LA-Franklin LA-Catahoula-Tensas-Concordia-Bolivar- Sunflower-Leflore-Grenada-Carroll-Montgomery-Webster-Clay-Lowndes- Choctaw-Oktibbeha-Washington-Humphreys-Holmes-Attala-Winston- Noxubee-Issaquena-Sharkey-Yazoo-Madison MS-Leake-Neshoba-Kemper- Warren-Hinds-Rankin-Scott-Newton-Lauderdale-Claiborne-Copiah- Simpson-Smith-Jasper-Clarke-Jefferson-Adams-Franklin MS-Lincoln- Lawrence-Jefferson Davis-Covington-Jones-Marion-Lamar-Forrest- 240 PM CDT Wed Aug 12 2020 This hazardous weather outlook is for portions of southeast Arkansas, northeast Louisiana, central Mississippi, north central Mississippi, and south central Mississippi. .DAY ONE...Tonight and Thursday The probability for widespread hazardous weather is low. .DAYS TWO THROUGH SEVEN...Thursday night through Tuesday Heat indices near 105 degrees during the late morning and afternoon hours Friday through Sunday will result in increasing heat stress, mainly for areas west of Interstate 55. (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 Tuesday. 15 && ...HAZARD LEGEND... No short term hazards expected. ...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
In the hours before
Special weather statement, Aug 12, 3:56 PM CDT, 3 hours 34 minutes before
Special Weather Statement
National Weather Service Jackson MS
356 PM CDT Wed Aug 12 2020
MSZ033-038-039-122130-
Oktibbeha MS-Winston MS-Noxubee MS-
356 PM CDT Wed Aug 12 2020
...A STRONG THUNDERSTORM WILL AFFECT NORTHWESTERN NOXUBEE...
SOUTHEASTERN OKTIBBEHA AND EASTERN WINSTON COUNTIES UNTIL 430 PM
CDT...
At 355 PM CDT, Meteorologists were tracking a strong thunderstorm
over Millcreek, or near Louisville, moving east at 30 mph.
Winds in excess of 40 mph will be possible with this storm.
This strong thunderstorm will be near...
Betheden around 400 PM CDT.
Mashulaville around 420 PM CDT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
High winds can bring down trees and large limbs resulting in serious
injury or property damage. Exercise extreme caution when outdoors
during such strong winds...and be especially aware of older trees.
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
&&
LAT...LON 3307 8861 3298 8900 3326 8909 3335 8867
3329 8867 3329 8864
TIME...MOT...LOC 2055Z 258DEG 28KT 3313 8898
JNESpecial weather statement, Aug 12, 4:23 PM CDT, 3 hours 7 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 |
|---|---|---|---|---|
| Aug 13, 4:36 AM CDT | Special Weather Statement | JAN | Hinds | 24 min |
| Aug 13, 6:01 AM CDT | Flash Flood Warning | JAN | Hinds | 119 min |
| Aug 13, 7:56 AM CDT | Flash Flood Warning | JAN | Hinds, Warren | 3 hr |
| Aug 13, 11:39 AM CDT | Special Weather Statement | JAN | Noxubee | 51 min |
| Aug 13, 12:14 PM CDT | Special Weather Statement | JAN | Lowndes | 46 min |
| Aug 13, 6:36 PM CDT | River Flood Warning | JAN | Hinds, Warren | 12 hr |
| Aug 13, 8:38 AM CDT | Special Weather Statement | JAN | Morehouse | 37 min |
| Aug 13, 9:34 AM CDT | Special Weather Statement | JAN | East Carroll | 26 min |
| Aug 13, 11:07 AM CDT | Special Weather Statement | JAN | Morehouse | 23 min |
| Aug 13, 11:21 AM CDT | Severe Thunderstorm Warning | JAN | Morehouse, Richland | 39 min |
| Aug 13, 2:16 PM CDT | Special Weather Statement | JAN | Catahoula, Concordia | 59 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; radar from the NEXRAD Level II archive.