Alert archive / Florida / Flash Flood Warnings in 2017

Flash Flood Warning 54, NWS Mobile, AL

June 29, 2017Escambia County, Santa Rosa County, Florida

NWS Mobile, AL issued this flash flood warning at Jun 29, 2017, 9:18 AM CDT for Escambia County, Santa Rosa 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
Jun 29, 2017, 9:18 AM CDT (14:18 UTC)
Expired
Jun 29, 2017, 3:15 PM CDT
In force
6 hr
Issued by
NWS Mobile, AL
Area
Storm-based polygon
Flood severity
None

Counties Escambia County, FL, Santa Rosa County, FL

The radar

The Mobile radar (KMOB), 100 km from the middle of the area, began a volume at 14:20 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.

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 2.3 hours before the alert went out and 245 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-pSkew-T log-p diagram, Slidell Radar S, LA at 12:00Z on 2017-06-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 166 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Slidell Radar S, LA at 12:00Z on 2017-06-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 98 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
166 J/kg
Mixed-layer CIN
-11 J/kg
Mixed-layer LCL
635 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
98 m²/s²
0-3 km storm-relative helicity
131 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

750 
WGUS54 KMOB 291418
FFWMOB
FLC033-113-292015-
/O.NEW.KMOB.FF.W.0054.170629T1418Z-170629T2015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mobile AL
918 AM CDT THU JUN 29 2017

The National Weather Service in Mobile has issued a

* Flash Flood Warning for...
  Northwestern Santa Rosa County in northwestern Florida...
  Central Escambia County in northwestern Florida...

* Until 315 PM CDT

* At 915 AM CDT, Doppler radar indicated showers and thunderstorms 
  producing very heavy rain across the warned area. Up to 4 inches 
  of rain have fallen. Flash flooding is expected to begin shortly.

* Some locations that will experience flooding include...
  Ferry Pass, Ensley, Chumuckla, Gonzalez, Pace, Milton, Molino, Pea
  Ridge, Floridatown, McDavid and Point Baker.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

&&

LAT...LON 3060 8733 3077 8731 3091 8725 3090 8695
      3074 8698 3050 8711 3049 8727

$$
1 follow-up statement
932 
WGUS74 KMOB 291607
FFSMOB

Flash Flood Statement
National Weather Service Mobile AL
1107 AM CDT THU JUN 29 2017

FLC033-113-291615-
/O.CAN.KMOB.FF.W.0054.000000T0000Z-170629T2015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Santa Rosa FL-Escambia FL-
1107 AM CDT THU JUN 29 2017

...THE FLASH FLOOD WARNING FOR NORTHWESTERN SANTA ROSA AND CENTRAL
ESCAMBIA COUNTIES IS CANCELLED...

The heavy rain has ended and flash flooding is no longer expected to 
pose a threat. 

LAT...LON 3060 8733 3077 8731 3091 8725 3090 8695
      3074 8698 3050 8711 3049 8727

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 28, 8:13 PM CDTAreal Flood AdvisoryMOBEscambia3 hr
Jun 29, 2:37 AM CDTFlash Flood WatchMOBEscambia, Santa Rosa19 hr
Jun 29, 4:56 AM CDTSpecial Weather StatementMOBOkaloosa64 min
Jun 29, 5:32 AM CDTAreal Flood AdvisoryMOBOkaloosa, Santa Rosa3 hr
Jun 29, 6:22 AM CDTAreal Flood AdvisoryMOBOkaloosa, Santa Rosa3 hr
Jun 29, 7:09 AM CDTAreal Flood AdvisoryMOBEscambia, Santa Rosa3 hr
Jun 29, 7:45 AM CDTAreal Flood AdvisoryMOBEscambia, Okaloosa, Santa Rosa3 hr
Jun 29, 9:30 AM CDTAreal Flood AdvisoryMOBOkaloosa, Santa Rosa3 hr
Jun 29, 11:15 AM CDTAreal Flood AdvisoryMOBOkaloosa3 hr
Jun 29, 12:28 PM CDTAreal Flood AdvisoryMOBOkaloosa, Santa Rosa3 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.