Alert archive / Alabama / Flash Flood Warnings in 2018

Flash Flood Warning 44, NWS Mobile, AL

December 28, 2018Clarke County, Wilcox County, Alabama

NWS Mobile, AL issued this flash flood warning at Dec 28, 2018, 6:28 AM CST for Clarke County, Wilcox County, Alabama. It was in force for 3 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
Dec 28, 2018, 6:28 AM CST (12:28 UTC)
Expired
Dec 28, 2018, 9:30 AM CST
In force
3 hr
Issued by
NWS Mobile, AL
Area
Storm-based polygon
Flood severity
None

Counties Clarke County, AL, Wilcox County, AL

The radar

The Mobile radar (KMOB), 149 km from the middle of the area, began a volume at 12:32 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

Jackson, MS (KJAN), launched 12:00Z, 0.5 hours before the alert went out and 225 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, Jackson, MS at 12:00Z on 2018-12-28Temperature 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°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Jackson, MS at 12:00Z on 2018-12-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -68 square meters per square second.1939587897117Sfc1 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
1011 m above ground
0-6 km bulk shear
72 kt
0-1 km storm-relative helicity
-68 m²/s²
0-3 km storm-relative helicity
-150 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

194 
WGUS54 KMOB 281228
FFWMOB
ALC025-131-281530-
/O.NEW.KMOB.FF.W.0044.181228T1228Z-181228T1530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mobile AL
628 AM CST FRI DEC 28 2018

The National Weather Service in Mobile has issued a

* Flash Flood Warning for...
  Clarke County in southwestern Alabama...
  Western Wilcox County in south central Alabama...

* Until 930 AM CST.

* At 626 AM CST, Doppler radar indicated moderate rainfall 
  continuing across the warned area. Up to 6 inches of rain has 
  already fallen in some locations. Flash flooding is ongoing and 
  will only be exacerbated by additional rainfall.

* Some locations that will experience flooding include...
  Jackson, Thomasville, Grove Hill, Whatley, Pine Hill, Coffeeville,
  Fulton and Yellow Bluff.

Additional rainfall amounts of around an inch are possible in the 
warned area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3227 8744 3220 8733 3215 8728 3183 8739
      3181 8752 3157 8757 3146 8792 3152 8793
      3160 8808 3174 8809 3181 8818 3194 8807
      3195 8812 3196 8807 3199 8807 3200 8763
      3213 8762 3213 8752 3226 8752 3227 8748

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Dec 27, 6:32 PM CSTFlash Flood WarningMOBChoctaw, Clarke, Monroe, Washington, Wilcox6 hr
Dec 27, 6:57 PM CSTRiver Flood WarningMOBCovington, Escambia16 hr
Dec 27, 6:59 PM CSTSpecial Weather StatementMOBClarke46 min
Dec 27, 7:00 PM CSTRiver Flood WarningMOBBaldwin16 hr
Dec 27, 7:05 PM CSTAreal Flood AdvisoryMOBButler, Clarke, Conecuh, Covington, Crenshaw, Monroe and 1 more3 hr
Dec 27, 8:24 PM CSTRiver Flood WarningMOBDallas, Monroe, Wilcox13 days
Dec 27, 8:24 PM CSTRiver Flood WarningMOBClarke, Monroe, Wilcox15 days
Dec 27, 8:39 PM CSTFlash Flood WarningMOBChoctaw6 hr
Dec 27, 10:02 PM CSTAreal Flood AdvisoryMOBButler, Conecuh, Covington, Crenshaw, Monroe, Wilcox3 hr
Dec 28, 12:29 AM CSTFlash Flood WarningMOBChoctaw, Clarke, Washington3 hr
Dec 28, 2:13 AM CSTMarine Dense Fog AdvisoryMOB16 hr
Dec 28, 2:28 AM CSTSpecial Weather StatementMOBChoctaw47 min
Dec 28, 2:30 AM CSTSevere Thunderstorm WarningMOBChoctaw45 min
Dec 28, 2:47 AM CSTTornado WarningMOBWashington28 min
Dec 28, 3:08 AM CSTSpecial Weather StatementMOBClarke37 min
Dec 28, 3:13 AM CSTSevere Thunderstorm WarningMOBChoctaw, Clarke, Washington19 min
Dec 28, 3:28 AM CSTFlash Flood WarningMOBChoctaw, Clarke, Washington, Wilcox3 hr
Dec 28, 4:12 AM CSTFlash Flood Warning EmergencyMOBChoctaw3 hr
Dec 28, 4:45 AM CSTSevere Thunderstorm WarningMOBMobile, Washington45 min
Dec 28, 4:52 AM CSTAreal Flood AdvisoryMOBMobile, Washington3 hr
Dec 28, 5:20 AM CSTSpecial Weather StatementMOBMobile40 min
Dec 28, 5:51 AM CSTSpecial Marine WarningMOB84 min
Dec 28, 5:54 AM CSTSpecial Weather StatementMOBBaldwin, Mobile66 min
Dec 28, 6:04 AM CSTSpecial Weather StatementMOBMonroe41 min
Dec 28, 6:25 AM CSTAreal Flood WarningMOBChoctaw, Washington6 hr
Dec 28, 8:23 AM CSTSpecial Weather StatementMOBCovington52 min
Dec 28, 8:38 AM CSTSpecial Marine WarningMOB97 min
Dec 28, 8:42 AM CSTSpecial Marine WarningMOB68 min
Dec 28, 9:03 AM CSTAreal Flood WarningMOBChoctaw, Clarke, Washington, Wilcox27 hr
Dec 28, 1:15 PM CSTAreal Flood AdvisoryMOBBaldwin3 hr

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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.