Alert archive / Alabama / Flash Flood Warnings in 2018

Flash Flood Warning 12, NWS Mobile, AL

May 29, 2018Butler County, Covington County, Crenshaw County, Alabama

NWS Mobile, AL issued this flash flood warning at May 29, 2018, 12:18 AM CDT for Butler County, Covington County, Crenshaw County, Alabama. It was in force for 6 hr. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
May 29, 2018, 12:18 AM CDT (05:18 UTC)
Expired
May 29, 2018, 6:15 AM CDT
In force
6 hr
Issued by
NWS Mobile, AL
Area
Storm-based polygon
Flood severity
None

Counties Butler County, AL, Covington County, AL, Crenshaw County, AL

The radar

The Ft Rucker radar (KEOX), 75 km from the middle of the area, began a volume at 05:18 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.

What was reported inside it

TimeReportWhereRemark
May 29, 1:00 AM CDTFLASH FLOOD4 Nw Honoraville, ALROAD CLOSED DUE TO FLOODING FROM THE RAIN BANDS OF SUBTROPICAL STORM ALBERTO.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Birmingham, AL (KBMX), launched 00:00Z, 5.3 hours before the alert went out and 181 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 2018-05-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 42 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Birmingham, AL at 00:00Z on 2018-05-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 48 square meters per square second.1939Sfc1 km3 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
42 J/kg
Mixed-layer CIN
-577 J/kg
Mixed-layer LCL
834 m above ground
0-6 km bulk shear
15 kt
0-1 km storm-relative helicity
48 m²/s²
0-3 km storm-relative helicity
-9 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

791 
WGUS54 KMOB 290518
FFWMOB
ALC013-039-041-291115-
/O.NEW.KMOB.FF.W.0012.180529T0518Z-180529T1115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mobile AL
1218 AM CDT TUE MAY 29 2018

The National Weather Service in Mobile has issued a

* Flash Flood Warning for...
  Northeastern Butler County in south central Alabama...
  Crenshaw County in south central Alabama...
  Northeastern Covington County in south central Alabama...

* Until 615 AM CDT.

* At 1218 AM CDT, Doppler radar indicated thunderstorms producing
  heavy rain across the warned area. Flash flooding is expected to
  begin shortly.

* Some locations that will experience flooding include...
  Andalusia, Luverne, Brantley, Rutledge, Dozier, Glenwood and
  Petrey.

LAT...LON 3153 8620 3131 8619 3130 8645 3190 8654
      3189 8617 3179 8620 3179 8615 3166 8615
      3162 8618 3162 8615 3154 8614

$$
2 follow-up statements
504 
WGUS74 KMOB 290716
FFSMOB

Flash Flood Statement
National Weather Service Mobile AL
216 AM CDT TUE MAY 29 2018

ALC013-039-041-291115-
/O.CON.KMOB.FF.W.0012.000000T0000Z-180529T1115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Butler AL-Crenshaw AL-Covington AL-
216 AM CDT TUE MAY 29 2018

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 615 AM CDT FOR
NORTHEASTERN BUTLER...CRENSHAW AND NORTHEASTERN COVINGTON COUNTIES...

At 215 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.

Some locations that will experience flooding include...
Andalusia, Luverne, Brantley, Rutledge, Dozier, Glenwood and Petrey. 

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 3153 8620 3131 8619 3130 8645 3190 8654
      3189 8617 3179 8620 3179 8615 3166 8615
      3162 8618 3162 8615 3154 8614

$$
920 
WGUS74 KMOB 291118
FFSMOB

Flash Flood Statement
National Weather Service Mobile AL
618 AM CDT TUE MAY 29 2018

ALC013-039-041-291127-
/O.EXP.KMOB.FF.W.0012.000000T0000Z-180529T1115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Butler AL-Crenshaw AL-Covington AL-
618 AM CDT TUE MAY 29 2018

...THE FLASH FLOOD WARNING FOR NORTHEASTERN BUTLER...CRENSHAW AND
NORTHEASTERN COVINGTON COUNTIES HAS EXPIRED...

The heavy rain has ended. Flooding is no longer expected to pose a 
significant threat. Please continue to heed any remaining road 
closures.

LAT...LON 3153 8620 3131 8619 3130 8645 3190 8654
      3189 8617 3179 8620 3179 8615 3166 8615
      3162 8618 3162 8615 3154 8614

$$

The office that day

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

IssuedProductOfficeCountiesLasted
May 28, 7:06 PM CDTSpecial Weather StatementMOBWashington39 min
May 28, 7:43 PM CDTSpecial Weather StatementMOBMobile47 min
May 28, 8:44 PM CDTFlash Flood WarningMOBButler, Conecuh, Covington, Escambia, Monroe6 hr
May 28, 10:57 PM CDTSpecial Weather StatementMOBConecuh, Escambia48 min
May 29, 3:36 AM CDTSpecial Weather StatementMOBButler39 min

Nearby

Flash Flood Warnings in Alabama, 2018Every flash flood warning in 2018

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.