Alert archive / Florida / Flash Flood Warnings in 2017
Flash Flood Warning 21, NWS Jacksonville, FL
NWS Jacksonville, FL issued this flash flood warning at Sep 11, 2017, 12:19 PM EDT for 4 counties in Florida. It was in force for 6 hr. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Sep 11, 2017, 12:19 PM EDT (16:19 UTC)
- Expired
- Sep 11, 2017, 6:15 PM EDT
- In force
- 6 hr
- Issued by
- NWS Jacksonville, FL
- Area
- Storm-based polygon
- Emergency
- Flash flood emergency
- Flood severity
- None
Counties Clay County, FL, Duval County, FL, Putnam County, FL, Saint Johns County, FL
The radar
The Jacksonville radar (KJAX), 95 km from the middle of the area, began a volume at 16:20 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Sep 11, 2:58 PM EDT | FLASH FLOOD | 2 Ssw Switzerland, FL | MULTIPLE SWIFT WATER RESCUES EXECUTED BY LAW ENFORCEMENT. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Tampa Bay, FL (KTBW), launched 12:00Z, 4.3 hours before the alert went out and 226 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 3742 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- -17 m²/s²
- 0-3 km storm-relative helicity
- 24 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
846
WGUS52 KJAX 111619
FFWJAX
FLC019-031-107-109-112215-
/O.NEW.KJAX.FF.W.0021.170911T1619Z-170911T2215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Jacksonville FL
1219 PM EDT MON SEP 11 2017
...FLASH FLOOD EMERGENCY FOR ST. JOHNS RIVER BASIN FROM DOWNTOWN
JACKSONVILLE SOUTHWARD THROUGH PUTNAM COUNTY...
The National Weather Service in Jacksonville has issued a
* Flash Flood Warning for...
Western St. Johns County in northeastern Florida...
Eastern Putnam County in northeastern Florida...
Northeastern Clay County in northeastern Florida...
South central Duval County in northeastern Florida...
* Until 615 PM EDT Monday
* At 1213 PM EDT, emergency management reported flash flooding,
including water rescues on the St. Johns River and its tributaries.
This is a FLASH FLOOD EMERGENCY for the St. Johns River basin from
Downtown Jacksonville southward through Putnam County.
This is a PARTICULARLY DANGEROUS SITUATION. Go to the highest point
in your house if a single story, or on the second story if possible.
DO NOT GO INTO FLOOD WATERS as there may be electric current in the
water. Water will continue to rise until around 2 pm in Downtown
Jacksonville and will continue through the afternoon hours as the
tide moves southward through the St. Johns River basin. Water levels
may reach 4 to 6 ft above ground level on the immediate banks of the
St. Johns and 2 to 4 ft elsewhere.
* Some locations that will experience flooding include...
Jacksonville, Palatka, Orange Park, Green Cove Springs, Pomona
Park, Hastings, East Palatka, Mandarin, Fruit Cove and Ortega.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Move to the highest point in your house or at least the second
story, if possible. This is an extremely dangerous and life-
threatening situation. Do not attempt to travel unless you are
fleeing an area subject to flooding or under an evacuation order.
&&
LAT...LON 2950 8161 2935 8156 2932 8168 2934 8168
2934 8166 2936 8166 2937 8171 2953 8180
2977 8167 3005 8174 3030 8173 3035 8164
2975 8145
$$
ARB1 follow-up statement
485
WGUS72 KJAX 112211
FFSJAX
Flash Flood Statement
National Weather Service Jacksonville FL
611 PM EDT MON SEP 11 2017
FLC019-031-107-109-112215-
/O.EXP.KJAX.FF.W.0021.000000T0000Z-170911T2215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
St. Johns FL-Putnam FL-Clay FL-Duval FL-
611 PM EDT MON SEP 11 2017
...THE FLASH FLOOD WARNING FOR WESTERN ST. JOHNS...EASTERN PUTNAM...
NORTHEASTERN CLAY AND SOUTH CENTRAL DUVAL COUNTIES WILL EXPIRE AT 615
PM EDT...
The storm surge flooding along the St. Johns River has not ended.
Water levels will remain high for the next couple of days. Further
details can be found in the Coastal Flood Warning which has been
issued for the affected area.
LAT...LON 2950 8161 2935 8156 2932 8168 2934 8168
2934 8166 2936 8166 2937 8171 2953 8180
2977 8167 3005 8174 3030 8173 3035 8164
2975 8145
$$
ARBThe office that day
Everything else NWS Jacksonville, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 10, 8:06 PM EDT | Areal Flood Warning | JAX | Duval, Nassau, Saint Johns | 3 hr |
| Sep 10, 8:09 PM EDT | Areal Flood Warning | JAX | Clay, Duval, Flagler, Putnam, Saint Johns | 3 hr |
| Sep 10, 8:10 PM EDT | Tornado Warning | JAX | Flagler, Saint Johns | 35 min |
| Sep 10, 8:38 PM EDT | Areal Flood Warning | JAX | Alachua, Baker, Bradford, Clay, Duval, Putnam and 2 more | 3 hr |
| Sep 10, 8:44 PM EDT | Areal Flood Warning | JAX | Duval, Nassau | 3 hr |
| Sep 10, 10:23 PM EDT | Flash Flood Warning | JAX | Duval, Nassau | 3 hr |
| Sep 10, 10:56 PM EDT | Areal Flood Warning | JAX | Clay, Duval, Nassau, Saint Johns | 6 hr |
| Sep 11, 12:26 AM EDT | Areal Flood Warning | JAX | Alachua, Bradford, Clay, Flagler, Marion, Putnam and 1 more | 3 hr |
| Sep 11, 12:38 AM EDT | Areal Flood Warning | JAX | Nassau | 6 hr |
| Sep 11, 12:49 AM EDT | Flash Flood Warning | JAX | Flagler, Marion, Putnam, Saint Johns | 5 hr |
| Sep 11, 1:35 AM EDT | Flash Flood Warning | JAX | Clay, Flagler, Putnam, Saint Johns | 3 hr |
| Sep 11, 2:02 AM EDT | Tornado Warning | JAX | Nassau | 28 min |
| Sep 11, 2:10 AM EDT | Flash Flood Warning | JAX | Clay, Saint Johns | 3 hr |
| Sep 11, 2:31 AM EDT | Flash Flood Warning | JAX | Clay, Duval, Nassau, Saint Johns | 3 hr |
| Sep 11, 2:34 AM EDT | Tornado Warning | JAX | Nassau | 6 min |
| Sep 11, 2:41 AM EDT | Flash Flood Warning | JAX | Clay, Duval, Saint Johns | 3 hr |
| Sep 11, 3:36 AM EDT | Tornado Warning | JAX | Duval | 24 min |
| Sep 11, 4:10 AM EDT | Flash Flood Warning | JAX | Duval, Nassau | 3 hr |
| Sep 11, 4:22 AM EDT | Areal Flood Advisory | JAX | Marion | 3 hr |
| Sep 11, 4:38 AM EDT | Areal Flood Advisory | JAX | Alachua, Bradford, Clay, Putnam | 3 hr |
| Sep 11, 5:08 AM EDT | Areal Flood Warning | JAX | Alachua, Baker, Bradford, Columbia, Gilchrist, Union | 3 hr |
| Sep 11, 5:14 AM EDT | Flash Flood Warning | JAX | Nassau | 3 hr |
| Sep 11, 5:34 AM EDT | Flash Flood Warning | JAX | Clay, Duval, Nassau, Saint Johns | 3 hr |
| Sep 11, 6:15 AM EDT | Flash Flood Warning | JAX | Baker, Bradford, Clay, Columbia, Duval, Union | 3 hr |
| Sep 11, 6:37 AM EDT | Areal Flood Warning | JAX | Columbia, Hamilton, Suwannee | 3 hr |
| Sep 11, 6:45 AM EDT | Flash Flood Warning | JAX | Duval | 6 hr |
| Sep 11, 8:23 AM EDT | Areal Flood Warning | JAX | Clay, Duval, Nassau, Saint Johns | 3 hr |
| Sep 11, 9:06 AM EDT | Areal Flood Warning | JAX | Baker, Bradford, Clay, Columbia, Duval, Union | 3 hr |
| Sep 11, 9:48 AM EDT | River Flood Warning | JAX | Columbia, Gilchrist, Suwannee | 18 days |
| Sep 11, 5:11 PM EDT | Wind Advisory | JAX | Baker, Bradford, Duval, Flagler, Gilchrist, Nassau and 2 more | 5 hr |
| Sep 11, 5:18 PM EDT | Coastal Flood Warning | JAX | Duval, Flagler, Nassau | 3 days |
| Sep 11, 5:18 PM EDT | Rip Current Statement | JAX | Duval, Flagler, Nassau | 27 hr |
| Sep 11, 5:18 PM EDT | High Surf Advisory | JAX | Duval, Flagler, Nassau | 10 hr |
| Sep 11, 5:26 PM EDT | Small Craft Advisory | JAX | 28 hr |
Nearby
Flash Flood Warnings in Florida, 2017Every flash flood warning 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.