Alert archive / Louisiana / Heat Advisories in 2018
Heat Advisory 9, NWS Jackson, MS
NWS Jackson, MS issued this heat advisory at Jul 17, 2018, 3:08 AM CDT for 5 counties in Mississippi; 8 parishes in Louisiana; Ashley County, Chicot County, Arkansas. It took effect at Jul 17, 2018, 11:00 AM CDT. It was in force for .
The area
The counties it named.
The facts
- Issued
- Jul 17, 2018, 3:08 AM CDT (08:08 UTC)
- In effect from
- Jul 17, 2018, 11:00 AM CDT
- Expired
- Jul 17, 2018, 10:09 AM CDT
- In force
- Issued by
- NWS Jackson, MS
Counties Ashley County, AR, Chicot County, AR, Catahoula Parish, LA, East Carroll Parish, LA, Franklin Parish, LA, Madison Parish, LA, Morehouse Parish, LA, Richland Parish, LA, Tensas Parish, LA, West Carroll Parish, LA, Bolivar County, MS, Issaquena County, MS, Sharkey County, MS, Warren County, MS, Washington County, MS
The radar
The Jackson/Brandon,MS radar (KDGX), 134 km from the middle of the area, began a volume at 08:10 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
Little Rock, AR (KBYH), launched 00:00Z, 8.1 hours before the alert went out and 269 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
- 912 J/kg
- Mixed-layer CIN
- -112 J/kg
- Mixed-layer LCL
- 1195 m above ground
- 0-6 km bulk shear
- 10 kt
- 0-1 km storm-relative helicity
- 38 m²/s²
- 0-3 km storm-relative helicity
- 65 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this heat advisory 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 heat advisory went out at Jul 17, 12:37 AM CDT, 2 hours 31 minutes earlier.
Area forecast discussion, Jul 17, 12:37 AM CDT, 2 hours 31 minutes before
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</html>Hazardous weather outlook, Jul 16, 3:40 PM CDT, 11 hours 28 minutes before
Hazardous Weather Outlook National Weather Service Jackson MS 340 PM CDT Mon Jul 16 2018 ARZ074-075-LAZ007>009-015-016-023>026-MSZ040-047-053-059-060- 172045- Ashley-Chicot-Morehouse-West Carroll-East Carroll-Richland- Madison LA-Franklin LA-Catahoula-Tensas-Concordia-Issaquena- Warren-Claiborne-Jefferson-Adams- 340 PM CDT Mon Jul 16 2018 This hazardous weather outlook is for portions of southeast Arkansas, northeast Louisiana, southwest Mississippi, and west central Mississippi. .DAY ONE...Tonight and Tuesday EXCESSIVE HEAT THREAT...Limited TIMING...Through the remainder of this afternoon The combination of heat and humidity today is expected to result in several hours of heat index values near 105 degrees for the rest of the afternoon. Precautions should be taken to avoid strenuous outdoor activities. Check on those vulnerable to heat stress. Stay hydrated and wear light, loose fitted clothing. (https://www.weather.gov/images/jan/graphicast/1.png) .DAYS TWO THROUGH SEVEN...Tuesday night through Sunday High temperatures in the upper 90s to near 100 will combine with high humidity to produce heat indices at or above 105 each afternoon Thursday through Sunday. Precautions should be taken to avoid strenuous outdoor activities. Check on those vulnerable to heat stress. Stay hydrated and wear light, loose fitted clothing. (https://www.weather.gov/images/jan/graphicast/2.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 Sunday. MSZ018-019-025>039-041>046-048>052-054>058-061>066-072>074-172045- Bolivar-Sunflower-Leflore-Grenada-Carroll-Montgomery-Webster-Clay- Lowndes-Choctaw-Oktibbeha-Washington-Humphreys-Holmes-Attala- Winston-Noxubee-Sharkey-Yazoo-Madison MS-Leake-Neshoba-Kemper- Hinds-Rankin-Scott-Newton-Lauderdale-Copiah-Simpson-Smith-Jasper- Clarke-Franklin MS-Lincoln-Lawrence-Jefferson Davis-Covington- Jones-Marion-Lamar-Forrest- 340 PM CDT Mon Jul 16 2018 This hazardous weather outlook is for portions of central Mississippi, north central Mississippi, and south central Mississippi. .DAY ONE...Tonight and Tuesday The probability for widespread hazardous weather is low. .DAYS TWO THROUGH SEVEN...Tuesday night through Sunday High temperatures in the upper 90s to near 100 will combine with high humidity to produce heat indices at or above 105 each afternoon Thursday through Sunday. Precautions should be taken to avoid strenuous outdoor activities. Check on those vulnerable to heat stress. Stay hydrated and wear light, loose fitted clothing. (https://www.weather.gov/images/jan/graphicast/2.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 Sunday. 3 && ...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... 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/jan/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, Jul 16, 9:08 PM CDT, 6 hours before
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</html>Local storm report, Jul 16, 9:21 PM CDT, 5 hours 47 minutes before
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</html>Local storm report, Jul 16, 10:36 PM CDT, 4 hours 32 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 16, 7:20 PM CDT | Flash Flood Warning | JAN | Carroll, Leflore | 87 min |
| Jul 16, 7:26 PM CDT | Special Weather Statement | JAN | Leflore | 49 min |
| Jul 16, 7:53 PM CDT | Special Weather Statement | JAN | Warren | 52 min |
| Jul 16, 8:11 PM CDT | Severe Thunderstorm Warning | JAN | Claiborne, Warren | 49 min |
| Jul 16, 9:01 PM CDT | Special Weather Statement | JAN | Claiborne | 44 min |
| Jul 17, 3:10 PM CDT | Special Weather Statement | JAN | Bolivar | 35 min |
| Jul 17, 3:43 PM CDT | Severe Thunderstorm Warning | JAN | Bolivar | 32 min |
| Jul 17, 5:02 PM CDT | Special Weather Statement | JAN | Lowndes | 28 min |
| Jul 17, 5:42 PM CDT | Special Weather Statement | JAN | Kemper | 33 min |
| Jul 17, 5:43 PM CDT | Special Weather Statement | JAN | Lauderdale | 32 min |
| Jul 17, 6:18 PM CDT | Special Weather Statement | JAN | Lauderdale | 27 min |
| Jul 16, 9:08 PM CDT | Special Weather Statement | JAN | Madison | 52 min |
| Jul 16, 9:47 PM CDT | Special Weather Statement | JAN | Tensas | 43 min |
| Jul 17, 2:08 PM CDT | Special Weather Statement | JAN | Ashley | 37 min |
| Jul 17, 2:43 PM CDT | Special Weather Statement | JAN | Chicot | 32 min |
Nearby
Heat Advisories in Louisiana, 2018Heat Advisories in Mississippi, 2018Heat Advisories in Arkansas, 2018Every heat advisory in 2018
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.