Alert archive / Alabama / Flash Flood Warnings in 2017

Flash Flood Warning 78, NWS Mobile, AL

October 8, 20176 counties in Alabama

NWS Mobile, AL issued this flash flood warning at Oct 8, 2017, 1:31 AM CDT for 6 counties in Alabama. 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 8, 2017, 1:31 AM CDT (06:31 UTC)
Expired
Oct 8, 2017, 7:30 AM CDT
In force
6 hr
Issued by
NWS Mobile, AL
Area
Storm-based polygon
Flood severity
None

Counties Choctaw County, AL, Clarke County, AL, Conecuh County, AL, Monroe County, AL, Washington County, AL, Wilcox County, AL

The radar

The Mobile radar (KMOB), 127 km from the middle of the area, began a volume at 06:31 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

Birmingham, AL (KBMX), launched 00:00Z, 6.5 hours before the alert went out and 188 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, Birmingham, AL at 00:00Z on 2017-10-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 599 joules per kilogram.LCLLFCEL10008507005003002001001 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, Birmingham, AL at 00:00Z on 2017-10-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 113 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
599 J/kg
Mixed-layer CIN
-40 J/kg
Mixed-layer LCL
707 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
113 m²/s²
0-3 km storm-relative helicity
189 m²/s²
Significant tornado parameter
0.3
Supercell composite
5.1

Open this sounding in Storm Lab

The text

As transmitted.

089 
WGUS54 KMOB 080631
FFWMOB
ALC023-025-035-099-129-131-081230-
/O.NEW.KMOB.FF.W.0078.171008T0631Z-171008T1230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mobile AL
131 AM CDT SUN OCT 8 2017

The National Weather Service in Mobile has issued a

* Flash Flood Warning for...
  Monroe County in south central Alabama...
  South central Choctaw County in southwestern Alabama...
  Northeastern Washington County in southwestern Alabama...
  Clarke County in southwestern Alabama...
  Southwestern Wilcox County in south central Alabama...
  Southwestern Conecuh County in south central Alabama...

* Until 730 AM CDT Sunday

* At 129 AM CDT, Doppler radar indicated heavy rain with embedded 
  thunderstorms 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...
  Monroeville, Jackson, Thomasville, Frisco City, Grove Hill, Saint
  Stephens, Leroy, Uriah, Whatley, Excel, Coffeeville, Fulton and
  Repton.

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 3201 8811 3199 8810 3200 8809 3200 8808
      3199 8807 3199 8801 3188 8738 3129 8718
      3126 8768 3136 8773 3150 8825 3203 8824

$$
1 follow-up statement
969 
WGUS74 KMOB 080939
FFSMOB

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

ALC023-025-035-099-129-131-081230-
/O.CON.KMOB.FF.W.0078.000000T0000Z-171008T1230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Monroe AL-Choctaw AL-Washington AL-Clarke AL-Wilcox AL-Conecuh AL-
439 AM CDT SUN OCT 8 2017

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 730 AM CDT FOR
MONROE...SOUTH CENTRAL CHOCTAW...NORTHEASTERN WASHINGTON...CLARKE...
SOUTHWESTERN WILCOX AND SOUTHWESTERN CONECUH COUNTIES...

At 438 AM CDT, Doppler radar indicated thunderstorms producing heavy
rain across the warned area. Up 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...
Monroeville, Jackson, Thomasville, Frisco City, Grove Hill, Saint
Stephens, Leroy, Uriah, Whatley, Excel, Coffeeville, Fulton and
Repton.

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 3201 8811 3199 8810 3200 8809 3200 8808
      3199 8807 3199 8801 3188 8738 3129 8718
      3126 8768 3136 8773 3150 8825 3203 8824

$$

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 7, 11:46 PM CDTFlash Flood WarningMOBBaldwin, Conecuh, Escambia, Monroe6 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

Nearby

Flash Flood Warnings in Alabama, 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.