Alert archive / Mississippi / Special Weather Statements in 2017
Special Weather Statement, NWS Jackson, MS
NWS Jackson, MS issued this special weather statement at Aug 19, 2017, 3:28 PM CDT for Claiborne County, Mississippi. It was in force for 47 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Aug 19, 2017, 3:28 PM CDT (20:28 UTC)
- Expired
- Aug 19, 2017, 4:15 PM CDT
- In force
- 47 min
- Issued by
- NWS Jackson, MS
County Claiborne County, MS
The radar
The Jackson/Brandon,MS radar (KDGX), 107 km from the middle of the area, began a volume at 20:29 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, 8.5 hours before the alert went out and 99 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
- 1850 J/kg
- Mixed-layer CIN
- -29 J/kg
- Mixed-layer LCL
- 910 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 58 m²/s²
- 0-3 km storm-relative helicity
- 27 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.1
The text
As transmitted.
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</html>What forecasters said that day
The local office's own words before this special weather statement 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 special weather statement went out at Aug 19, 12:38 PM CDT, 2 hours 50 minutes earlier.
Area forecast discussion, Aug 19, 12:38 PM CDT, 2 hours 50 minutes before
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</html>Hazardous weather outlook, Aug 19, 3:10 PM CDT, 18 minutes before
Hazardous Weather Outlook National Weather Service Jackson MS 310 PM CDT Sat Aug 19 2017 ARZ074-075-LAZ007>009-015-016-023>026-MSZ018-019-025>028-034>037- 040>066-072>074-202015- Ashley-Chicot-Morehouse-West Carroll-East Carroll-Richland- Madison LA-Franklin LA-Catahoula-Tensas-Concordia-Bolivar- Sunflower-Leflore-Grenada-Carroll-Montgomery-Washington-Humphreys- Holmes-Attala-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- 310 PM CDT Sat Aug 19 2017 This hazardous weather outlook is for portions of southeast Arkansas, northeast Louisiana, central Mississippi, north central Mississippi, northwest Mississippi, and south central Mississippi. .DAY ONE...Tonight and Sunday EXCESSIVE HEAT THREAT...Elevated TIMING...Sunday Temperatures in the low to mid 90s are expected to combine with dewpoints in the mid to upper 70s again Sunday. This will result in heat index values ranging from 105-109 degrees from 11AM til 7PM. Exposure to these conditions will raise the likelihood of heat related illnesses. (www.weather.gov/images/jan/graphicast/image1.png) .DAYS TWO THROUGH SEVEN...Sunday night through Friday Temperatures in the low to mid 90s are expected to combine with dewpoints in the low to mid 70s to result in heat index values ranging from 102-105 degrees mainly during the afternoon Monday. This area is primarily west of Interstate 55. Prolonged exposure to these conditions raise the likelihood of heat related illnesses. (www.weather.gov/images/jan/graphicast/image2.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. MSZ029>033-038-039-202015- Webster-Clay-Lowndes-Choctaw-Oktibbeha-Winston-Noxubee- 310 PM CDT Sat Aug 19 2017 This hazardous weather outlook is for portions of central Mississippi, east central Mississippi, north central Mississippi, and northeast Mississippi. .DAY ONE...Tonight and Sunday EXCESSIVE HEAT THREAT...Limited TIMING...Sunday Temperatures in the low to mid 90s are expected to combine with dewpoints in the low to mid 70s to result in heat index values ranging from 102-105 degrees mainly during the afternoon again Sunday. Prolonged exposure to these conditions raise the likelihood of heat related illnesses. (www.weather.gov/images/jan/graphicast/image1.png) .DAYS TWO THROUGH SEVEN...Sunday night through Friday 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 is not expected through next Friday. 21 && ...HAZARD LEGEND... *EXCESSIVE HEAT* Extreme...Maximum heat index greater than 110 degrees for 3 or more days in a row and/or air temperatures greater than 107 degrees. Significant...Maximum heat index greater than 110 degrees and/or air temperatures greater than 105 degrees. Elevated...Maximum heat index 105 to 110 degrees and/or air temperatures greater than 103 degrees. Limited...Maximum heat index near 105 degrees and/or air temperatures 100 to 103 degrees. ...USEFUL WEATHER WEB PAGES (URLS)... NWS JAN Home page... www.weather.gov/jan Stay Aware, Stay Safe NWS JAN Briefing Page... www.weather.gov/jan/safe Latest Weather Briefing... www.weather.gov/jan/weather_briefing Tropical page... www.weather.gov/jan/tropical National Hurricane Center Home Page... www.nhc.noaa.gov/ Find NWS JAN on Facebook... www.facebook.com/NWSJacksonMS Follow NWS JAN on Twitter... @NWSJacksonMS Follow NWS JAN on Youtube... www.youtube.com/user/NWSJacksonMiss
In the hours before
Special weather statement, Aug 19, 12:57 PM CDT, 2 hours 31 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 19, 12:57 PM CDT | Special Weather Statement | JAN | Forrest | 63 min |
| Aug 19, 3:21 PM CDT | Special Weather Statement | JAN | Marion | 39 min |
| Aug 19, 3:52 PM CDT | Special Weather Statement | JAN | Forrest, Lamar | 38 min |
| Aug 19, 3:57 PM CDT | Severe Thunderstorm Warning | JAN | Warren | 32 min |
| Aug 19, 4:28 PM CDT | Special Weather Statement | JAN | Forrest, Lamar | 47 min |
| Aug 19, 4:42 PM CDT | Special Weather Statement | JAN | Copiah | 63 min |
| Aug 19, 5:10 PM CDT | Special Weather Statement | JAN | Forrest | 35 min |
| Aug 19, 5:47 PM CDT | Special Weather Statement | JAN | Jasper | 58 min |
| Aug 19, 5:54 PM CDT | Severe Thunderstorm Warning | JAN | Jasper, Smith | 34 min |
| Aug 19, 6:08 PM CDT | Special Weather Statement | JAN | Franklin | 67 min |
| Aug 19, 4:37 PM CDT | Special Weather Statement | JAN | Richland | 53 min |
| Aug 18, 8:23 PM CDT | Special Weather Statement | JAN | Chicot | 52 min |
Nearby
Special Weather Statements in Mississippi, 2017Every special weather statement in 2017
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.