Alert archive / Alabama / Flash Flood Warnings in 2017

Flash Flood Warning 64, NWS Mobile, AL

August 4, 2017Mobile County, Alabama

NWS Mobile, AL issued this flash flood warning at Aug 4, 2017, 5:42 PM CDT for Mobile County, Alabama. It was in force for 2 hr. 4 reports 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
Aug 4, 2017, 5:42 PM CDT (22:42 UTC)
Expired
Aug 4, 2017, 7:45 PM CDT
In force
2 hr
Issued by
NWS Mobile, AL
Area
Storm-based polygon
Flood severity
None

County Mobile County, AL

The radar

The Mobile radar (KMOB), 8 km from the middle of the area, began a volume at 22:44 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
Aug 4, 5:45 PM CDTFLASH FLOOD2 Wnw I10 And I65 Inter, ALWATER OVER ROADWAY AT THE INTERSECTION OF US 90 AND AZALEA ROAD
Aug 4, 5:45 PM CDTFLASH FLOOD3 Wsw Cottage Hill Park, ALWATER OVER THE ROADWAY NEAR SCHILLINGER AND COTTAGE HILL.
Aug 4, 5:54 PM CDTFLASH FLOOD2 Nne Schillinger And T, ALFLOODING OVER SOLLIE ROAD NEAR HALLS MILL CREEK.
Aug 4, 6:13 PM CDTFLASH FLOOD2 Wsw I10 And I65 Inter, ALROAD MADE IMPASSABLE DUE TO FLOODING NEAR HALLS MILL RD AND RIVIERE DU CHIEN RD.

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

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 10.7 hours before the alert went out and 154 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 2017-08-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1794 joules per kilogram.LCLEL10008507005003002001001 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 2017-08-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 124 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
1794 J/kg
Mixed-layer CIN
-3 J/kg
Mixed-layer LCL
644 m above ground
0-6 km bulk shear
14 kt
0-1 km storm-relative helicity
124 m²/s²
0-3 km storm-relative helicity
89 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

195 
WGUS54 KMOB 042242
FFWMOB
ALC097-050045-
/O.NEW.KMOB.FF.W.0064.170804T2242Z-170805T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mobile AL
542 PM CDT FRI AUG 4 2017

The National Weather Service in Mobile has issued a

* Flash Flood Warning for...
  Central Mobile County in southwestern Alabama...

* Until 745 PM CDT

* At 541 PM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. 3 to 5 inches of rain has 
  fallen. Flash flooding is expected to begin shortly.

* Some locations that will experience flooding include...
  Midtown Mobile, Tillmans Corner, I10 And I65 and Mobile Regional
  Airport.

Additional rainfall amounts of 2 to 3 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.

Please report flooding to your local law enforcement agency when you
can do so safely.

A Flash Flood Warning means that flooding is imminent or occurring.
If you are in the warned area move to higher ground immediately.
Residents living along streams and creeks should take immediate
precautions to protect life and property.

&&

LAT...LON 3068 8805 3054 8809 3061 8833 3071 8829

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 4, 6:03 AM CDTSpecial Marine WarningMOB57 min
Aug 4, 6:22 AM CDTSpecial Marine WarningMOB23 min
Aug 4, 7:20 AM CDTSpecial Marine WarningMOB55 min
Aug 4, 7:39 AM CDTSpecial Marine WarningMOB96 min
Aug 4, 8:02 AM CDTSpecial Weather StatementMOBBaldwin58 min
Aug 4, 8:22 AM CDTAreal Flood AdvisoryMOBBaldwin3 hr
Aug 4, 8:38 AM CDTFlash Flood WarningMOBBaldwin3 hr
Aug 4, 9:14 AM CDTSpecial Marine WarningMOB2 hr
Aug 4, 11:23 AM CDTAreal Flood AdvisoryMOBBaldwin3 hr
Aug 4, 12:22 PM CDTSpecial Marine WarningMOB83 min
Aug 4, 1:17 PM CDTSpecial Marine WarningMOB88 min
Aug 4, 5:09 PM CDTAreal Flood AdvisoryMOBBaldwin2 hr
Aug 4, 5:15 PM CDTAreal Flood AdvisoryMOBMobile2 hr
Aug 4, 5:29 PM CDTAreal Flood AdvisoryMOBMobile2 hr
Aug 4, 5:37 PM CDTSpecial Weather StatementMOBMobile23 min
Aug 4, 6:09 PM CDTSpecial Weather StatementMOBEscambia51 min

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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.