Alert archive / Florida / Flash Flood Warnings in 2012

Flash Flood Warning 22, NWS Jacksonville, FL

June 26, 2012Flagler County, Saint Johns County, Florida

NWS Jacksonville, FL issued this flash flood warning at Jun 26, 2012, 10:53 PM EDT for Flagler County, Saint Johns County, Florida. It was in force for 3 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: Jun 26, 2012, 10:53 PM EDT (02:53 UTC)
Expired: Jun 27, 2012, 1:45 AM EDT
In force: 3 hr
Issued by: NWS Jacksonville, FL
Area: Storm-based polygon
Flood severity: None

Counties Flagler County, FL, Saint Johns County, FL

The radar

The Jacksonville radar (KJAX), 99 km from the middle of the area, began a volume at 02:54 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
Jun 27, 12:09 AM EDT	FLOOD	Palm Coast, FL	A SPOTTER IN WEST PALM COAST MEASURED 7.20 INCHES OF RAIN FROM 8 AM TO MIDNIGHT.

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 00:00Z, 2.9 hours before the alert went out and 234 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 693 J/kg
Mixed-layer CIN: -4 J/kg
Mixed-layer LCL: 664 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 111 m²/s²
0-3 km storm-relative helicity: 98 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

144 
WGUS52 KJAX 270253
FFWJAX
FLC035-109-270545-
/O.NEW.KJAX.FF.W.0022.120627T0253Z-120627T0545Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE JACKSONVILLE FL
1053 PM EDT TUE JUN 26 2012

THE NATIONAL WEATHER SERVICE IN JACKSONVILLE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHERN ST. JOHNS COUNTY IN NORTHEAST FLORIDA
  NORTHERN FLAGLER COUNTY IN NORTHEAST FLORIDA

* UNTIL 145 AM EDT

* AT 1050 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  VERY HEAVY RAIN FROM A THUNDERSTORM OVER THE WARNED AREA.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO VILANO
  BEACH...SAINT AUGUSTINE SOUTH...SAINT AUGUSTINE SHORES...SAINT
  AUGUSTINE BEACH...SAINT AUGUSTINE...HASTINGS...CRESCENT BEACH AND
  BUTLER BEACH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

RADAR RAINFALL ESTIMATES OF 2 TO 6 INCHES EXTEND ACROSS THIS 
AREA...AND ANOTHER 2 TO 4 INCHES OF RAIN ARE POSSIBLE THROUGH 130 
AM. THIS RAINFALL WILL LIKELY PRODUCE SIGNIFICANT FLOODING.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. MOVE
UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS
SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. MOVE TO HIGHER GROUND.

REPORT FLOODING TO THE NEAREST LAW ENFORCEMENT AGENCY OR YOUR COUNTY
EMERGENCY MANAGEMENT...OR YOU CAN ALSO CALL THE NATIONAL WEATHER
SERVICE IN JACKSONVILLE DIRECTLY AT 800-499-1594 TO REPORT FLOODING.

&&

LAT...LON 2939 8146 2940 8147 2975 8152 2975 8153
      2983 8154 2997 8131 2952 8116

$$

TRABERT

The office that day

Everything else NWS Jacksonville, FL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 26, 8:26 PM EDT	Flash Flood Warning	JAX	Alachua	3 hr
Jun 26, 8:44 PM EDT	Flash Flood Warning	JAX	Saint Johns	3 hr
Jun 26, 9:19 PM EDT	Special Marine Warning	JAX		116 min
Jun 26, 9:43 PM EDT	Flash Flood Warning	JAX	Marion, Putnam	3 hr
Jun 26, 9:45 PM EDT	Flash Flood Warning	JAX	Clay, Duval, Nassau, Saint Johns	3 hr
Jun 27, 12:40 AM EDT	Areal Flood Warning	JAX	Clay, Duval	6 hr
Jun 27, 3:33 AM EDT	Rip Current Statement	JAX	Flagler, Nassau	17 hr
Jun 27, 5:24 AM EDT	Wind Advisory	JAX	Flagler, Nassau	4 hr
Jun 27, 7:20 AM EDT	Coastal Flood Advisory	JAX	Flagler, Nassau	12 hr
Jun 27, 7:20 AM EDT	High Surf Advisory	JAX	Flagler, Nassau	12 hr
Jun 27, 9:42 AM EDT	Lake Wind Advisory	JAX	Flagler, Nassau	8 hr

Nearby

Flash Flood Warnings in Florida, 2012 Every flash flood warning in 2012

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.