Alert archive / Alabama / Flash Flood Warnings in 2020

Flash Flood Warning 20, NWS Mobile, AL

July 12, 2020Monroe County, Wilcox County, Alabama

NWS Mobile, AL issued this flash flood warning at Jul 12, 2020, 5:23 PM CDT for Monroe County, Wilcox County, Alabama. It was in force for 112 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 12, 2020, 5:23 PM CDT (22:23 UTC)
Expired: Jul 12, 2020, 7:15 PM CDT
In force: 112 min
Issued by: NWS Mobile, AL
Area: Storm-based polygon
Flood severity: None

Counties Monroe County, AL, Wilcox County, AL

The radar

The Birmingham radar (KBMX), 157 km from the middle of the area, began a volume at 22:26 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 12:00Z, 10.4 hours before the alert went out and 158 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 43 J/kg
Mixed-layer CIN: -299 J/kg
Mixed-layer LCL: 1793 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 37 m²/s²
0-3 km storm-relative helicity: 68 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

661 
WGUS54 KMOB 122223
FFWMOB
ALC099-131-130015-
/O.NEW.KMOB.FF.W.0020.200712T2223Z-200713T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mobile AL
523 PM CDT Sun Jul 12 2020

The National Weather Service in Mobile has issued a

* Flash Flood Warning for...
  Northeastern Monroe County in south central Alabama...
  South Central Wilcox County in south central Alabama...

* Until 715 PM CDT.

* At 523 PM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Flash flooding is ongoing or 
  expected to begin shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Doppler radar.

  IMPACT...Flooding of small creeks and streams, urban areas,
           highways, streets and underpasses as well as other
           drainage and low lying areas.

* Some locations that will experience flash flooding include...
  Beatrice, Vredenburgh, Chestnut, Buena Vista, Nadawah, Pineville, 
  Natchez, Riley, River Ridge and Turnbull.

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.

&&

LAT...LON 3188 8738 3187 8711 3183 8710 3170 8707
      3170 8733

FLASH FLOOD...RADAR INDICATED

$$

CGAL

1 follow-up statement

923 
WGUS74 KMOB 130014
FFSMOB

Flash Flood Statement
National Weather Service Mobile AL
714 PM CDT Sun Jul 12 2020

ALC099-131-130024-
/O.EXP.KMOB.FF.W.0020.000000T0000Z-200713T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Monroe AL-Wilcox AL-
714 PM CDT Sun Jul 12 2020

...FLASH FLOOD WARNING WILL EXPIRE AT 715 PM CDT THIS EVENING FOR 
NORTHEASTERN MONROE AND SOUTH CENTRAL WILCOX COUNTIES...

The heavy rain has ended and water is starting to recede. Therefore, 
flooding is no longer expected to pose a threat. Please continue to 
heed any remaining road closures.

LAT...LON 3188 8738 3187 8711 3183 8710 3170 8707
      3170 8733

$$

CGAL

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 12, 2:58 PM CDT	Special Weather Statement	MOB	Choctaw	47 min
Jul 12, 3:26 PM CDT	Heat Advisory	MOB	Baldwin, Mobile	28 hr
Jul 12, 3:28 PM CDT	Severe Thunderstorm Warning	MOB	Wilcox	47 min
Jul 12, 3:35 PM CDT	Special Weather Statement	MOB	Washington	25 min
Jul 12, 3:56 PM CDT	Special Weather Statement	MOB	Wilcox	34 min
Jul 12, 4:01 PM CDT	Severe Thunderstorm Warning	MOB	Monroe, Wilcox	44 min
Jul 12, 4:21 PM CDT	Severe Thunderstorm Warning	MOB	Monroe, Wilcox	54 min
Jul 12, 4:28 PM CDT	Special Weather Statement	MOB	Wilcox	47 min
Jul 12, 4:51 PM CDT	Areal Flood Advisory	MOB	Monroe, Wilcox	114 min
Jul 12, 4:56 PM CDT	Severe Thunderstorm Warning	MOB	Clarke, Monroe, Wilcox	31 min
Jul 12, 5:15 PM CDT	Special Weather Statement	MOB	Baldwin	30 min
Jul 12, 5:15 PM CDT	Severe Thunderstorm Warning	MOB	Butler, Clarke, Conecuh, Monroe, Wilcox	45 min
Jul 12, 5:35 PM CDT	Severe Thunderstorm Warning	MOB	Choctaw	55 min
Jul 12, 5:49 PM CDT	Special Marine Warning	MOB		56 min
Jul 12, 5:57 PM CDT	Severe Thunderstorm Warning	MOB	Butler, Conecuh, Covington, Crenshaw, Escambia	48 min
Jul 12, 6:19 PM CDT	Special Marine Warning	MOB		116 min
Jul 12, 6:33 PM CDT	Severe Thunderstorm Warning	MOB	Washington	42 min
Jul 12, 6:36 PM CDT	Areal Flood Advisory	MOB	Covington, Crenshaw, Escambia	114 min
Jul 12, 6:42 PM CDT	Special Marine Warning	MOB		80 min

Nearby

Flash Flood Warnings in Alabama, 2020 Every flash flood warning in 2020

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.