Alert archive / Florida / Areal Flood Warnings in 2021
Areal Flood Warning 88, NWS Jacksonville, FL
NWS Jacksonville, FL issued this areal flood warning at Sep 19, 2021, 9:07 AM EDT for Duval County, Florida. It was in force for 85 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Sep 19, 2021, 9:07 AM EDT (13:07 UTC)
- Expired
- Sep 19, 2021, 10:32 AM EDT
- In force
- 85 min
- Issued by
- NWS Jacksonville, FL
- Area
- Storm-based polygon
- Flood severity
- None
County Duval County, FL
The radar
The Jacksonville radar (KJAX), 17 km from the middle of the area, began a volume at 13:08 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, 1.1 hours before the alert went out and 19 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
- 1261 J/kg
- Mixed-layer CIN
- -5 J/kg
- Mixed-layer LCL
- 478 m above ground
- 0-6 km bulk shear
- 2 kt
- 0-1 km storm-relative helicity
- -17 m²/s²
- 0-3 km storm-relative helicity
- -5 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 Sep 19, 7:42 AM EDT, 1 hour 25 minutes earlier.
Area forecast discussion, Sep 19, 7:42 AM EDT, 1 hour 25 minutes before
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</html>In the hours before
Special weather statement, Sep 19, 7:39 AM EDT, 1 hour 28 minutes before
Special Weather Statement
National Weather Service Jacksonville FL
739 AM EDT Sun Sep 19 2021
FLZ124-125-133-325-191230-
Coastal St. Johns FL-South Central Duval FL-Coastal Nassau FL-
Coastal Duval FL-
739 AM EDT Sun Sep 19 2021
...Heavy showers will impact portions of east central Nassau,
northeastern St. Johns and eastern Duval Counties through 830 AM
EDT...
At 738 AM EDT, Doppler radar was tracking a gusty shower near Little
Talbot Island, or 10 miles northeast of Unf, moving northwest at 5
mph.
HAZARD...Minor flooding due to heavy rainfall and upcoming high
tide, which may prevent drainage at coastal locations.
SOURCE...Radar indicated.
IMPACT...Minor flooding due to heavy rainfall is possible.
Locations impacted include...
Unf, Ponte Vedra Beach, Neptune Beach, Sawgrass, Baymeadows, Nocatee,
Durbin, Craig Field, San Pablo and Little Talbot Island.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Torrential rainfall are occurring with these downpours, which may
lead to localized flooding, particularly at coastal locations. Do
not drive your vehicle through flooded roadways.
&&
LAT...LON 3013 8155 3055 8163 3055 8139 3025 8135
2998 8125
TIME...MOT...LOC 1138Z 131DEG 5KT 3041 8144
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...<30 MPH
NELSONSpecial weather statement, Sep 19, 8:32 AM EDT, 35 minutes before
Special Weather Statement National Weather Service Jacksonville FL 832 AM EDT Sun Sep 19 2021 FLZ024-124-125-225-425-191345- Western Duval FL-Inland Nassau FL-Trout River FL-Coastal Nassau FL- Coastal Duval FL- 832 AM EDT Sun Sep 19 2021 ...Torrential downpours will impact portions of central Nassau and northeastern Duval Counties through 945 AM EDT... At 832 AM EDT, Doppler radar was tracking heavy downpours near Fort Caroline, or 10 miles northeast of Arlington, moving northwest at 10 mph. HAZARD...Minor flooding due to heavy rainfall. SOURCE...Radar indicated. IMPACT...Minor flooding due to heavy rainfall is possible. Locations impacted include... Jacksonville International Arpt, Neptune Beach, Oceanway, Little Talbot Island and Fort Caroline. PRECAUTIONARY/PREPAREDNESS ACTIONS... Torrential rainfall is occurring with these showers and may lead to localized flooding. Do not drive your vehicle through flooded roadways. && LAT...LON 3044 8139 3026 8137 3053 8181 3069 8175 TIME...MOT...LOC 1232Z 127DEG 11KT 3047 8153 MAX HAIL SIZE...0.00 IN MAX WIND GUST...<30 MPH NELSON
Special weather statement, Sep 19, 8:44 AM EDT, 23 minutes before
Special Weather Statement National Weather Service Jacksonville FL 844 AM EDT Sun Sep 19 2021 GAZ165-166-191345- Inland Camden GA-Coastal Camden GA- 844 AM EDT Sun Sep 19 2021 ...Heavy downpours will impact portions of Camden County through 945 AM EDT... At 843 AM EDT, Doppler radar was tracking a gusty shower over Woodbine, moving northwest at 10 mph. HAZARD...Minor flooding due to heavy rainfall. SOURCE...Radar indicated. IMPACT...Minor flooding due to heavy rainfall is possible. Locations impacted include... Woodbine, Waverly, Tarboro, Harrietts Bluff, Dover Bluff and Colesburg. PRECAUTIONARY/PREPAREDNESS ACTIONS... Torrential rainfall is occurring with these showers, which may lead to localized flooding. Do not drive your vehicle through flooded roadways. && LAT...LON 3080 8150 3095 8189 3116 8177 3099 8145 TIME...MOT...LOC 1243Z 127DEG 9KT 3095 8167 MAX HAIL SIZE...0.00 IN MAX WIND GUST...<30 MPH NELSON
The office that day
Everything else NWS Jacksonville, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 18, 8:58 PM EDT | Areal Flood Warning | JAX | Alachua | 3 hr |
| Sep 18, 10:06 PM EDT | Special Weather Statement | JAX | Alachua | 54 min |
| Sep 18, 10:17 PM EDT | Areal Flood Warning | JAX | Alachua | 3 hr |
| Sep 19, 6:29 AM EDT | River Flood Warning | JAX | Alachua, Union | 8 days |
| Sep 19, 6:29 AM EDT | River Flood Warning | JAX | Alachua, Columbia | 10 days |
| Sep 19, 7:39 AM EDT | Special Weather Statement | JAX | Duval | 51 min |
| Sep 19, 8:32 AM EDT | Special Weather Statement | JAX | Nassau | 73 min |
| Sep 19, 9:55 AM EDT | River Flood Warning | JAX | Alachua, Columbia | 3 days |
| Sep 19, 11:08 AM EDT | Flood Watch | JAX | Alachua, Baker, Bradford, Clay, Duval, Gilchrist and 5 more | 33 hr |
| Sep 19, 3:25 PM EDT | Special Weather Statement | JAX | Baker | 35 min |
| Sep 19, 3:37 PM EDT | Special Weather Statement | JAX | Putnam | 23 min |
| Sep 19, 3:40 PM EDT | Special Weather Statement | JAX | Alachua | 35 min |
| Sep 19, 4:35 PM EDT | Special Weather Statement | JAX | Marion | 25 min |
| Sep 19, 8:44 AM EDT | Special Weather Statement | JAX | Camden | 61 min |
| Sep 19, 10:04 AM EDT | Special Weather Statement | JAX | Camden | 56 min |
| Sep 19, 11:47 AM EDT | Special Weather Statement | JAX | Glynn | 43 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.