Alert archive / Florida / Areal Flood Warnings in 2021
Areal Flood Warning 42, NWS Jacksonville, FL
NWS Jacksonville, FL issued this areal flood warning at Jul 22, 2021, 7:54 PM EDT for Clay County, Duval County, Florida. It was in force for 2 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Jul 22, 2021, 7:54 PM EDT (23:54 UTC)
- Expired
- Jul 22, 2021, 10:00 PM EDT
- In force
- 2 hr
- Issued by
- NWS Jacksonville, FL
- Area
- Storm-based polygon
- Flood severity
- None
Counties Clay County, FL, Duval County, FL
The radar
The Jacksonville radar (KJAX), 37 km from the middle of the area, began a volume at 23:56 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
Jacksonville, FL (KJAX), launched 12:00Z, 11.9 hours before the alert went out and 38 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
- 1564 J/kg
- Mixed-layer CIN
- -17 J/kg
- Mixed-layer LCL
- 754 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- -29 m²/s²
- 0-3 km storm-relative helicity
- -16 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this areal flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Jacksonville, FL wrote its last area forecast discussion before this areal flood warning went out at Jul 22, 7:53 PM EDT, 1 minute earlier.
Area forecast discussion, Jul 22, 7:53 PM EDT, 1 minute before
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</html>In the hours before
Special weather statement, Jul 22, 6:33 PM EDT, 1 hour 21 minutes before
Special Weather Statement National Weather Service Jacksonville FL 633 PM EDT Thu Jul 22 2021 FLZ023-024-031-122-425-GAZ364-222315- Baker FL-Western Duval FL-Inland Nassau FL-Bradford FL- Northern Columbia FL-Western Charlton GA- 633 PM EDT Thu Jul 22 2021 ...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN NASSAU...NORTHERN BRADFORD...BAKER...EAST CENTRAL COLUMBIA...WEST CENTRAL DUVAL AND SOUTH CENTRAL CHARLTON COUNTIES UNTIL 715 PM EDT... * At 633 PM EDT, National Weather Service meteorologists were tracking a strong thunderstorm 7 miles west of Taylor, or 20 miles northeast of Lake City, moving southeast at 25 mph. * Winds in excess of 45 mph and minor flooding due to heavy rainfall is possible with this storm. * Locations impacted include... Taylor, Macclenny, Glen St. Mary and Sanderson. PRECAUTIONARY/PREPAREDNESS ACTIONS... These winds can down small tree limbs and branches, and blow around unsecured small objects. Seek shelter in a safe building until the storm passes. Torrential rainfall is occurring with this storm, and may lead to localized flooding. Do not drive your vehicle through flooded roadways. To report severe weather, contact your nearest law enforcement agency. You can also share your report with NWS Jacksonville on Facebook and Twitter. && LAT...LON 3052 8243 3038 8196 3012 8211 3036 8252 TIME...MOT...LOC 2233Z 298DEG 21KT 3041 8240 23
Special weather statement, Jul 22, 7:07 PM EDT, 47 minutes before
Special Weather Statement National Weather Service Jacksonville FL 707 PM EDT Thu Jul 22 2021 FLZ033-125-132-232-325-425-222345- Eastern Clay FL-Western Clay FL-Western Duval FL- South Central Duval FL-Coastal Duval FL-Inland St. Johns FL- 707 PM EDT Thu Jul 22 2021 ...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN ST. JOHNS...NORTHERN CLAY AND SOUTH CENTRAL DUVAL COUNTIES UNTIL 745 PM EDT... * At 707 PM EDT, National Weather Service meteorologists were tracking a strong thunderstorm near Bellair-Meadowbrook Terrace, or near Orange Park, moving southeast at 10 mph. * Winds in excess of 45 mph and minor flooding due to heavy rainfall is possible with this storm. * Locations impacted include... Orange Park, Green Cove Springs, Middleburg, Mandarin, Fruit Cove, Fleming Island, Oakleaf Plantation, Bellair-Meadowbrook Terrace, Switzerland and Cecil Field. PRECAUTIONARY/PREPAREDNESS ACTIONS... These winds can down small tree limbs and branches, and blow around unsecured small objects. Seek shelter in a safe building until the storm passes. Torrential rainfall is occurring with this storm, and may lead to localized flooding. Do not drive your vehicle through flooded roadways. To report severe weather, contact your nearest law enforcement agency. You can also share your report with NWS Jacksonville on Facebook and Twitter. && LAT...LON 2990 8166 3010 8198 3027 8185 3012 8149 TIME...MOT...LOC 2307Z 302DEG 10KT 3017 8180 23
Local storm report, Jul 22, 7:30 PM EDT, 24 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE JACKSONVILLE FL
730 PM EDT THU JUL 22 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0720 PM TSTM WND DMG 2 S MACCLENNY 30.25N 82.12W
07/22/2021 BAKER FL PUBLIC
REPORT FROM MPING: TREES UPROOTED OR SNAPPED
NEAR STATE ROAD 121 AND JEFF STARLING ROAD.
&&
KCLocal storm report, Jul 22, 7:34 PM EDT, 20 minutes before
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</html>Local storm report, Jul 22, 7:40 PM EDT, 14 minutes before
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</html>Special weather statement, Jul 22, 7:45 PM EDT, 9 minutes before
Special Weather Statement National Weather Service Jacksonville FL 745 PM EDT Thu Jul 22 2021 FLZ125-133-225-325-425-230030- Coastal St. Johns FL-Western Duval FL-South Central Duval FL- Trout River FL-Coastal Duval FL- 745 PM EDT Thu Jul 22 2021 ...SIGNIFICANT WEATHER ADVISORY FOR NORTH CENTRAL ST. JOHNS AND SOUTHEASTERN DUVAL COUNTIES UNTIL 830 PM EDT... * At 745 PM EDT, National Weather Service meteorologists were tracking a strong thunderstorm over San Marco, or near Jacksonville, moving east at 30 mph. * Winds in excess of 45 mph and minor flooding due to heavy rainfall is possible with this storm. * Locations impacted include... Jacksonville, Unf, Arlington, Ponte Vedra Beach, Sawgrass, Baymeadows, Ortega, Craig Field, San Pablo and Palm Valley. PRECAUTIONARY/PREPAREDNESS ACTIONS... These winds can down small tree limbs and branches, and blow around unsecured small objects. Seek shelter in a safe building until the storm passes. Torrential rainfall is occurring with this storm, and may lead to localized flooding. Do not drive your vehicle through flooded roadways. To report severe weather, contact your nearest law enforcement agency. You can also share your report with NWS Jacksonville on Facebook and Twitter. && LAT...LON 3023 8175 3039 8168 3030 8139 3005 8131 TIME...MOT...LOC 2345Z 292DEG 25KT 3028 8165 23
The office that day
Everything else NWS Jacksonville, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 22, 4:28 PM EDT | Special Weather Statement | JAX | Flagler | 32 min |
| Jul 22, 4:38 PM EDT | Special Marine Warning | JAX | 67 min | |
| Jul 22, 4:52 PM EDT | Special Weather Statement | JAX | Lake | 23 min |
| Jul 22, 5:19 PM EDT | Special Weather Statement | JAX | Columbia, Suwannee | 41 min |
| Jul 22, 5:36 PM EDT | Severe Thunderstorm Warning | JAX | Suwannee | 24 min |
| Jul 22, 6:02 PM EDT | Special Weather Statement | JAX | Suwannee | 43 min |
| Jul 22, 6:04 PM EDT | Special Weather Statement | JAX | Flagler | 41 min |
| Jul 22, 6:07 PM EDT | Special Marine Warning | JAX | 53 min | |
| Jul 22, 6:32 PM EDT | Special Marine Warning | JAX | 58 min | |
| Jul 22, 6:33 PM EDT | Special Weather Statement | JAX | Baker | 42 min |
| Jul 22, 6:47 PM EDT | Severe Thunderstorm Warning | JAX | Flagler, Putnam, Saint Johns | 28 min |
| Jul 22, 6:56 PM EDT | Special Marine Warning | JAX | 94 min | |
| Jul 22, 6:59 PM EDT | Severe Thunderstorm Warning | JAX | Baker, Bradford, Clay, Duval, Nassau, Union | 31 min |
| Jul 22, 7:07 PM EDT | Special Weather Statement | JAX | Clay | 38 min |
| Jul 22, 7:13 PM EDT | Special Marine Warning | JAX | 62 min | |
| Jul 22, 7:29 PM EDT | Severe Thunderstorm Warning | JAX | Clay, Duval, Saint Johns | 46 min |
| Jul 22, 7:45 PM EDT | Special Weather Statement | JAX | Duval | 45 min |
| Jul 22, 7:52 PM EDT | Special Marine Warning | JAX | 83 min | |
| Jul 22, 7:16 AM EDT | Special Weather Statement | JAX | Coffee | 59 min |
| Jul 22, 4:14 PM EDT | Special Weather Statement | JAX | Brantley | 46 min |
| Jul 22, 4:56 PM EDT | Special Weather Statement | JAX | Echols | 49 min |
Nearby
Areal Flood Warnings in Florida, 2021Every areal flood warning 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.