Alert archive / Alabama / Flash Flood Warnings in 2017

Flash Flood Warning 77, NWS Mobile, AL

October 7, 20174 counties in Alabama; Escambia County, Santa Rosa County, Florida

NWS Mobile, AL issued this flash flood warning at Oct 7, 2017, 11:46 PM CDT for 4 counties in Alabama; 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
Oct 7, 2017, 11:46 PM CDT (04:46 UTC)
Expired
Oct 8, 2017, 5:45 AM CDT
In force
6 hr
Issued by
NWS Mobile, AL
Area
Storm-based polygon
Flood severity
None

Counties Baldwin County, AL, Conecuh County, AL, Escambia County, AL, Monroe County, AL, Escambia County, FL, Santa Rosa County, FL

The radar

The Mobile radar (KMOB), 109 km from the middle of the area, began a volume at 04:45 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 00:00Z, 4.8 hours before the alert went out and 252 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 00:00Z on 2017-10-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Slidell Radar S, LA at 00:00Z on 2017-10-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -81 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
601 m above ground
0-6 km bulk shear
12 kt
0-1 km storm-relative helicity
-81 m²/s²
0-3 km storm-relative helicity
-6 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

287 
WGUS54 KMOB 080446
FFWMOB
ALC003-035-053-099-FLC033-113-081045-
/O.NEW.KMOB.FF.W.0077.171008T0446Z-171008T1045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mobile AL
1146 PM CDT SAT OCT 7 2017

The National Weather Service in Mobile has issued a

* Flash Flood Warning for...
  South central Monroe County in south central Alabama...
  Northeastern Baldwin County in southwestern Alabama...
  Western Escambia County in south central Alabama...
  Southwestern Conecuh County in south central Alabama...
  Central Santa Rosa County in northwestern Florida...
  Escambia County in northwestern Florida...

* Until 545 AM CDT

* At 1145 PM CDT, Doppler radar indicated bands of thunderstorms 
  producing heavy rain streaming north across the warned area. Two 
  to three inches of rain have already fallen. Flash flooding is 
  expected to begin shortly.

* Some locations that will experience flooding include...
  Pensacola, Ferry Pass, Brent, West Pensacola, Ensley, Warrington,
  Gonzalez, Atmore, Pace, Milton, Gulf Breeze, Goulding, Century,
  Flomaton, Bagdad, Myrtle Grove, McCullough, Oriole Beach, Navarre
  and Molino.

Additional rainfall amounts of two to three inches are possible in 
the warned area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Be especially cautious at night when it is harder to recognize the
dangers of flooding.

&&

LAT...LON 3029 8736 3125 8767 3128 8729 3040 8679
      3039 8680 3039 8679 3036 8677

$$
1 follow-up statement
787 
WGUS74 KMOB 080638
FFSMOB

Flash Flood Statement
National Weather Service Mobile AL
138 AM CDT SUN OCT 8 2017

ALC003-035-053-099-FLC033-113-081045-
/O.CON.KMOB.FF.W.0077.000000T0000Z-171008T1045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Monroe AL-Baldwin AL-Escambia AL-Conecuh AL-Santa Rosa FL-
Escambia FL-
138 AM CDT SUN OCT 8 2017

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 545 AM CDT FOR
SOUTH CENTRAL MONROE...NORTHEASTERN BALDWIN...WESTERN ESCAMBIA...
SOUTHWESTERN CONECUH...CENTRAL SANTA ROSA AND ESCAMBIA COUNTIES...

At 137 AM CDT, Doppler radar indicated an area of rain with embedded 
thunderstorms producing heavy rain streaming north across the warned 
area. Two to three inches of rain have already fallen. Flash 
flooding is expected to begin shortly, if not already occurring.

Some locations that will experience flooding include...
Pensacola, Ferry Pass, Brent, West Pensacola, Ensley, Warrington,
Gonzalez, Atmore, Pace, Milton, Gulf Breeze, Goulding, Century,
Flomaton, Bagdad, Myrtle Grove, McCullough, Oriole Beach, Navarre and
Molino.

Additional rainfall amounts of two to three are possible in the 
warned area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Be especially cautious at night when it is harder to recognize the
dangers of flooding.

&&

LAT...LON 3029 8736 3125 8767 3128 8729 3040 8679
      3039 8680 3039 8679 3036 8677

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 7, 7:23 PM CDTSpecial Marine WarningMOB67 min
Oct 7, 7:28 PM CDTTornado WarningMOBBaldwin, Mobile, Washington47 min
Oct 7, 7:28 PM CDTTornado WarningMOBBaldwin, Mobile32 min
Oct 7, 7:33 PM CDTSpecial Marine WarningMOB57 min
Oct 7, 8:11 PM CDTTornado WarningMOBWashington20 min
Oct 7, 8:21 PM CDTSpecial Marine WarningMOB54 min
Oct 7, 9:13 PM CDTTornado WarningMOBBaldwin32 min
Oct 7, 9:18 PM CDTSpecial Marine WarningMOB57 min
Oct 7, 9:27 PM CDTTornado WarningMOBBaldwin48 min
Oct 7, 9:43 PM CDTTornado WarningMOBBaldwin32 min
Oct 7, 9:52 PM CDTFlash Flood WarningMOBBaldwin6 hr
Oct 7, 10:39 PM CDTSpecial Marine WarningMOB36 min
Oct 7, 11:01 PM CDTFlash Flood WarningMOBBaldwin, Clarke, Escambia, Mobile, Monroe, Washington6 hr
Oct 8, 1:31 AM CDTFlash Flood WarningMOBChoctaw, Clarke, Conecuh, Monroe, Washington, Wilcox6 hr
Oct 8, 2:06 AM CDTFlash Flood WarningMOBConecuh, Covington, Escambia7 hr
Oct 8, 2:53 AM CDTFlash Flood WarningMOBButler, Conecuh, Covington, Monroe, Wilcox6 hr
Oct 8, 3:41 AM CDTAreal Flood WarningMOBBaldwin6 hr
Oct 8, 3:51 AM CDTAreal Flood WarningMOBMobile6 hr
Oct 8, 4:46 AM CDTFlash Flood WarningMOBButler, Wilcox4 hr
Oct 8, 4:58 AM CDTAreal Flood WarningMOBBaldwin, Clarke, Escambia, Mobile, Monroe, Washington6 hr
Oct 8, 5:37 AM CDTAreal Flood WarningMOBBaldwin, Conecuh, Escambia, Monroe6 hr
Oct 8, 6:15 AM CDTFlash Flood WarningMOBButler, Covington, Crenshaw3 hr
Oct 8, 7:20 AM CDTAreal Flood WarningMOBChoctaw, Clarke, Conecuh, Monroe, Washington, Wilcox6 hr
Oct 8, 8:13 AM CDTSmall Craft AdvisoryMOB17 hr
Oct 8, 10:14 AM CDTRiver Flood WarningMOBCovington, Escambia63 hr
Oct 8, 10:19 AM CDTRiver Flood WarningMOBMobile11 hr
Oct 8, 10:20 AM CDTHigh Surf AdvisoryMOBBaldwin, Mobile21 hr
Oct 8, 11:09 AM CDTAreal Flood WarningMOBButler, Conecuh, Covington, Escambia6 hr
Oct 8, 12:58 AM CDTTornado WarningMOBOkaloosa32 min
Oct 8, 1:18 AM CDTTornado WarningMOBOkaloosa27 min
Oct 8, 10:06 AM CDTRiver Flood WarningMOBOkaloosa45 hr

Nearby

Flash Flood Warnings in Alabama, 2017Flash 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.