Alert archive / Florida / Flash Flood Warnings in 2017

Flash Flood Warning 72, NWS Mobile, AL

August 30, 2017Escambia County, Santa Rosa County, Florida

NWS Mobile, AL issued this flash flood warning at Aug 30, 2017, 10:08 AM CDT for Escambia County, Santa Rosa County, Florida. It was in force for 112 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Aug 30, 2017, 10:08 AM CDT (15:08 UTC)
Expired
Aug 30, 2017, 12:00 PM CDT
In force
112 min
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), 95 km from the middle of the area, began a volume at 15:08 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

Slidell Radar S, LA (KSIL), launched 12:00Z, 3.1 hours before the alert went out and 232 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 2017-08-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1853 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 2017-08-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 270 square meters per square second.193958Sfc1 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
1853 J/kg
Mixed-layer CIN
-7 J/kg
Mixed-layer LCL
550 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
270 m²/s²
0-3 km storm-relative helicity
310 m²/s²
Significant tornado parameter
2.2
Supercell composite
13.7

Open this sounding in Storm Lab

The text

As transmitted.

705 
WGUS54 KMOB 301508
FFWMOB
FLC033-113-301700-
/O.NEW.KMOB.FF.W.0072.170830T1508Z-170830T1700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mobile AL
1008 AM CDT WED AUG 30 2017

The National Weather Service in Mobile has issued a

* Flash Flood Warning for...
  Southwestern Santa Rosa County in northwestern Florida...
  Southeastern Escambia County in northwestern Florida...

* Until noon CDT

* At 1005 AM CDT, there were numerous reports of flooded roadways 
  across Greater Pensacola. Weather observation networks showed 
  between 4 and 7 inches of rain has fallen due to showers and 
  thunderstorms repeatedly moving across the same area. An 
  additional 1 to 3 inches of rain may be seen through early 
  afternoon across the region. 

* Some locations that will experience flooding include...
  Pensacola, Ferry Pass, Brent, West Pensacola, Ensley, Warrington,
  Gulf Breeze, Goulding, Myrtle Grove, Oriole Beach, Navarre,
  Pensacola Beach, Navarre Beach and Floridatown.

LAT...LON 3028 8740 3042 8741 3042 8740 3044 8740
      3044 8739 3045 8741 3056 8741 3060 8717
      3051 8700 3037 8685

$$

Butts
1 follow-up statement
320 
WGUS74 KMOB 301700
FFSMOB

Flash Flood Statement
National Weather Service Mobile AL
1200 PM CDT WED AUG 30 2017

FLC033-113-301710-
/O.EXP.KMOB.FF.W.0072.000000T0000Z-170830T1700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Santa Rosa FL-Escambia FL-
1200 PM CDT WED AUG 30 2017

...THE FLASH FLOOD WARNING FOR SOUTHWESTERN SANTA ROSA AND
SOUTHEASTERN ESCAMBIA COUNTIES HAS EXPIRED...

The heaviest rainfall has endded across the Greater Pensacola area. 
Please continue to heed any remaining road closures.

Additional statements will be issued as conditions warrant.

LAT...LON 3028 8740 3042 8741 3042 8740 3044 8740
      3044 8739 3045 8741 3056 8741 3060 8717
      3051 8700 3037 8685

$$

Butts

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 29, 8:03 PM CDTRiver Flood WarningMOBEscambia63 hr
Aug 29, 8:12 PM CDTRiver Flood WarningMOBOkaloosa3 days
Aug 30, 4:15 AM CDTWind AdvisoryMOBEscambia, Santa Rosa38 hr
Aug 30, 4:18 AM CDTSevere Thunderstorm WarningMOBEscambia42 min
Aug 30, 5:31 AM CDTAreal Flood AdvisoryMOBEscambia3 hr
Aug 30, 5:49 AM CDTSpecial Weather StatementMOBEscambia41 min
Aug 30, 6:35 AM CDTAreal Flood AdvisoryMOBEscambia3 hr
Aug 30, 6:36 AM CDTSpecial Weather StatementMOBSanta Rosa39 min
Aug 30, 6:59 AM CDTSpecial Weather StatementMOBEscambia46 min
Aug 30, 7:07 AM CDTFlash Flood WarningMOBEscambia3 hr
Aug 30, 7:07 AM CDTHigh Surf AdvisoryMOBEscambia, Okaloosa, Santa Rosa35 hr
Aug 30, 7:36 AM CDTSpecial Weather StatementMOBSanta Rosa39 min
Aug 30, 7:41 AM CDTFlash Flood WarningMOBEscambia3 hr
Aug 30, 7:54 AM CDTFlash Flood WarningMOBSanta Rosa3 hr
Aug 30, 8:30 AM CDTAreal Flood AdvisoryMOBEscambia3 hr
Aug 30, 9:55 AM CDTFlash Flood WarningMOBOkaloosa, Santa Rosa3 hr
Aug 30, 11:02 AM CDTAreal Flood AdvisoryMOBSanta Rosa3 hr
Aug 30, 11:27 AM CDTRiver Flood WarningMOBOkaloosa, Santa Rosa3 days
Aug 30, 12:52 PM CDTRiver Flood WarningMOBEscambia63 hr
Aug 30, 1:17 PM CDTRiver Flood WarningMOBOkaloosa, Santa Rosa48 hr
Aug 30, 3:12 PM CDTSpecial Weather StatementMOBEscambia48 min
Aug 30, 4:11 PM CDTSpecial Weather StatementMOBEscambia49 min
Aug 30, 4:20 PM CDTTornado WarningMOBEscambia25 min

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.