Alert archive / Mississippi / Dense Fog Advisories in 2021
Dense Fog Advisory 7, NWS Jackson, MS
NWS Jackson, MS issued this dense fog advisory at Jul 18, 2021, 7:06 AM CDT for 6 counties in Mississippi. It was in force for 114 min.
The area
The counties it named.
The facts
- Issued
- Jul 18, 2021, 7:06 AM CDT (12:06 UTC)
- Expired
- Jul 18, 2021, 9:00 AM CDT
- In force
- 114 min
- Issued by
- NWS Jackson, MS
Counties Covington County, MS, Forrest County, MS, Jefferson Davis County, MS, Jones County, MS, Lamar County, MS, Marion County, MS
The radar
The Jackson/Brandon,MS radar (KDGX), 106 km from the middle of the area, began a volume at 12:05 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, 0.1 hours before the alert went out and 114 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
- 505 J/kg
- Mixed-layer CIN
- -58 J/kg
- Mixed-layer LCL
- 870 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- 43 m²/s²
- 0-3 km storm-relative helicity
- 48 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this dense fog 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 dense fog advisory went out at Jul 18, 5:53 AM CDT, 1 hour 13 minutes earlier.
Area forecast discussion, Jul 18, 5:53 AM CDT, 1 hour 13 minutes before
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</html>Hazardous weather outlook, Jul 18, 3:20 AM CDT, 3 hours 46 minutes before
Hazardous Weather Outlook National Weather Service Jackson MS 320 AM CDT Sun Jul 18 2021 ARZ074-075-LAZ007>009-015-MSZ018-019-025>028-034>037-040>042- 182000- Ashley-Chicot-Morehouse-West Carroll-East Carroll-Richland- Bolivar-Sunflower-Leflore-Grenada-Carroll-Montgomery-Washington- Humphreys-Holmes-Attala-Issaquena-Sharkey-Yazoo- 320 AM CDT Sun Jul 18 2021 This hazardous weather outlook is for portions of southeast Arkansas, northeast Louisiana, central Mississippi, north central Mississippi, northwest Mississippi, and west central Mississippi. .DAY ONE...Today and Tonight... FLOODING THREAT...Limited TIMING...Today Additional showers and storms will affect the outlook area from late this morning through early this evening. Localized flash flooding will be possible during this time, as heavy rain falls across the same locations where soils are saturated from heavy rainfall in recent days. (https://www.weather.gov/images/jan/graphicast/1.png) .DAYS TWO THROUGH SEVEN...Monday through Saturday... 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 Saturday. LAZ016-023>026-MSZ029>033-038-039-043>066-072>074-182000- Madison LA-Franklin LA-Catahoula-Tensas-Concordia-Webster-Clay- Lowndes-Choctaw-Oktibbeha-Winston-Noxubee-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- 320 AM CDT Sun Jul 18 2021 This hazardous weather outlook is for portions of northeast Louisiana, central Mississippi, north central Mississippi, northeast Mississippi, and south central Mississippi. .DAY ONE...Today and Tonight... The probability for widespread hazardous weather is low. .DAYS TWO THROUGH SEVEN...Monday through Saturday... 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 Saturday. 19 && ...HAZARD LEGEND... *FLOODING* Extreme...Widespread and significant flooding is likely. Significant...Widespread flash flooding is likely and significant flooding is possible. Elevated...Areas of flash flooding likely. Limited...Localized flash flooding is 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 FLOODING ISSUES... Current Watches and Warnings... https://www.weather.gov/jan/safe_HeavyRain Observed Precipitation Images... https://www.weather.gov/jan/precipmaps River Forecast Center... https://www.weather.gov/lmrfc/ Significant River Flood Outlook... https://www.wpc.ncep.noaa.gov/nationalfloodoutlook/index.html Day 1 through 3 Excessive Rainfall... https://www.wpc.ncep.noaa.gov/qpf/excess_rain.shtml Excessive Rainfall Discussion... https://www.wpc.ncep.noaa.gov/discussions/qpferd.html Day 1 through 7 QPF... https://www.wpc.ncep.noaa.gov/qpf/qpf2.shtml QPF Discussion... https://www.wpc.ncep.noaa.gov/discussions/qpfpfd.html
The office that day
Everything else NWS Jackson, MS issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 18, 8:07 AM CDT | River Flood Warning | JAN | Madison, Yazoo | 6 days |
| Jul 18, 11:50 AM CDT | Special Weather Statement | JAN | Neshoba, Newton | 40 min |
| Jul 18, 1:04 PM CDT | Special Weather Statement | JAN | Bolivar | 56 min |
| Jul 18, 1:57 PM CDT | Special Weather Statement | JAN | Humphreys | 48 min |
| Jul 18, 2:00 PM CDT | Special Weather Statement | JAN | Sunflower | 45 min |
| Jul 18, 2:16 PM CDT | Special Weather Statement | JAN | Leflore, Sunflower | 29 min |
| Jul 18, 2:54 PM CDT | Special Weather Statement | JAN | Carroll, Leflore | 51 min |
| Jul 18, 3:22 PM CDT | Special Weather Statement | JAN | Issaquena | 38 min |
| Jul 18, 4:13 PM CDT | Special Weather Statement | JAN | Montgomery | 47 min |
| Jul 18, 4:47 PM CDT | Special Weather Statement | JAN | Leake | 43 min |
| Jul 18, 6:36 PM CDT | Special Weather Statement | JAN | Neshoba | 24 min |
| Jul 18, 6:38 PM CDT | Special Weather Statement | JAN | Scott | 52 min |
| Jul 18, 2:24 PM CDT | Special Weather Statement | JAN | West Carroll | 51 min |
Nearby
Dense Fog Advisories in Mississippi, 2021Every dense fog advisory in 2021
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.