Alert archive / Florida / Flash Flood Warnings in 2013

Flash Flood Warning 31, NWS Mobile, AL

July 6, 2013Okaloosa County, Florida

NWS Mobile, AL issued this flash flood warning at Jul 6, 2013, 12:23 PM CDT for Okaloosa County, Florida. It was in force for 6 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 6, 2013, 12:23 PM CDT (17:23 UTC)
Expired: Jul 6, 2013, 6:15 PM CDT
In force: 6 hr
Issued by: NWS Mobile, AL
Area: Storm-based polygon
Flood severity: None

County Okaloosa County, FL

The radar

The Eglin Afb radar (KEVX), 60 km from the middle of the area, began a volume at 17:22 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

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 5.4 hours before the alert went out and 214 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: 599 J/kg
Mixed-layer CIN: -20 J/kg
Mixed-layer LCL: 616 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 125 m²/s²
0-3 km storm-relative helicity: 167 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.

405 
WGUS54 KMOB 061723
FFWMOB
FLC091-062315-
/O.NEW.KMOB.FF.W.0031.130706T1723Z-130706T2315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOBILE AL
1223 PM CDT SAT JUL 6 2013

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTH CENTRAL OKALOOSA COUNTY IN NORTHWEST FLORIDA...

* UNTIL 615 PM CDT

* AT 1219 PM CDT...VERY HEAVY RAINFALL WAS INDICATED OVER THE
  WARNED AREA AND RADAR ESTIMATES SHOW UP TO 2 TO 3 INCHES OF
  RAINFALL HAS OCCURRED OVER THE PAST HOUR. THIS WILL LIKELY CAUSE
  FLASH FLOODING IN THE WARNED AREA.

* LOCATIONS IMPACTED INCLUDE...
  LAKE LORRAINE...      VALPARAISO...         NICEVILLE...
  EGLIN AFB...

LAT...LON 3043 8657 3050 8657 3054 8647 3046 8648
      3045 8649 3045 8653 3042 8655 3042 8656

$$

1 follow-up statement

460 
WGUS74 KMOB 061937
FFSMOB

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOBILE AL
237 PM CDT SAT JUL 6 2013

FLC091-061946-
/O.CAN.KMOB.FF.W.0031.000000T0000Z-130706T2315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
OKALOOSA FL-
237 PM CDT SAT JUL 6 2013

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR SOUTH CENTRAL
OKALOOSA COUNTY...

AT 230 PM CDT...THE HEAVY RAINFALL THAT PROMPTED THE WARNING FOR
SOUTH CENTRAL OKALOOSA COUNTY HAS ENDED...THUS THE FLASH FLOOD 
WARNING HAS BEEN CANCELLED. EVEN THOUGH FLASH FLOODING IS NO LONGER 
EXPECTED...MANY ROADS AND BRIDGES ARE STILL CLOSED DUE TO WATER 
STILL OVER THE ROADS. DO NOT DRIVE THROUGH WATER COVERED ROADWAYS!

IF YOU ARE IN DANGER FROM THE FLOOD WATERS AND NEED RESCUE ASSISTANCE
CALL 911. TO REPORT FLOODING TO THE NATIONAL WEATHER SERVICE CALL
(800) 284-9059.

LAT...LON 3043 8657 3050 8657 3054 8647 3046 8648
      3045 8649 3045 8653 3042 8655 3042 8656

$$

The office that day

Everything else NWS Mobile, AL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 5, 8:56 PM CDT	River Flood Warning	MOB	Okaloosa, Santa Rosa	27 hr
Jul 5, 10:27 PM CDT	Areal Flood Warning	MOB	Okaloosa	12 hr
Jul 5, 11:45 PM CDT	Areal Flood Warning	MOB	Santa Rosa	24 hr
Jul 6, 8:40 AM CDT	Areal Flood Advisory	MOB	Escambia	2 hr
Jul 6, 10:12 AM CDT	Areal Flood Advisory	MOB	Escambia, Santa Rosa	2 hr
Jul 6, 10:23 AM CDT	Areal Flood Warning	MOB	Okaloosa	12 hr
Jul 6, 10:52 AM CDT	Areal Flood Advisory	MOB	Escambia	113 min

Nearby

Flash Flood Warnings in Florida, 2013 Every flash flood warning in 2013

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.