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, 3:52 PM CDT for Forrest County, Lamar County, Mississippi. It was in force for 38 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, 3:52 PM CDT (20:52 UTC)
- Expired
- Aug 19, 2017, 4:30 PM CDT
- In force
- 38 min
- Issued by
- NWS Jackson, MS
Counties Forrest County, MS, Lamar County, MS
The nearest sounding before it
Slidell Radar S, LA (KSIL), launched 12:00Z, 8.9 hours before the alert went out and 92 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
- 1945 J/kg
- Mixed-layer CIN
- -32 J/kg
- Mixed-layer LCL
- 978 m above ground
- 0-6 km bulk shear
- 11 kt
- 0-1 km storm-relative helicity
- 9 m²/s²
- 0-3 km storm-relative helicity
- 21 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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, 3 hours 14 minutes earlier.
Area forecast discussion, Aug 19, 12:38 PM CDT, 3 hours 14 minutes before
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</html>Hazardous weather outlook, Aug 19, 3:10 PM CDT, 42 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 55 minutes before
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</html>Special weather statement, Aug 19, 3:52 PM CDT, 0 minutes before
Special Weather Statement
National Weather Service Jackson MS
352 PM CDT SAT AUG 19 2017
MSZ073-074-192130-
Lamar MS-Forrest MS-
352 PM CDT SAT AUG 19 2017
...STRONG STORMS WILL AFFECT FORREST AND LAMAR COUNTIES UNTIL 430 PM
CDT...
At 352 PM CDT, Meteorologists were tracking strong thunderstorms
along a line extending from near Sunrise to near Improve. Movement
was south at 15 mph.
Dime size hail and winds in excess of 40 mph will be possible with
these storms.
Strong thunderstorms will be near...
Mclaurin around 425 PM CDT.
Baxterville and Brooklyn around 430 PM CDT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Torrential rainfall is also occurring with these storms, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.
Frequent cloud to ground lightning is occurring with these storms.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
&&
LAT...LON 3096 8934 3100 8934 3101 8935 3101 8942
3098 8943 3098 8947 3100 8948 3100 8950
3101 8950 3101 8955 3100 8955 3100 8965
3133 8965 3137 8915 3100 8915 3100 8914
3098 8914
TIME...MOT...LOC 2052Z 354DEG 15KT 3131 8916 3128 8963
ECThe 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, 3:28 PM CDT | Special Weather Statement | JAN | Claiborne | 47 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.