Alert archive / Alabama / Flash Flood Warnings in 2020

Flash Flood Warning 2, NWS Mobile, AL

February 6, 2020Choctaw County, Alabama

NWS Mobile, AL issued this flash flood warning at Feb 6, 2020, 2:35 AM CST for Choctaw County, 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: Feb 6, 2020, 2:35 AM CST (08:35 UTC)
Expired: Feb 6, 2020, 8:30 AM CST
In force: 6 hr
Issued by: NWS Mobile, AL
Area: Storm-based polygon
Flood severity: None

County Choctaw County, AL

The radar

The Jackson/Brandon,MS radar (KDGX), 161 km from the middle of the area, began a volume at 08:40 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 00:00Z, 8.6 hours before the alert went out and 170 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: 847 J/kg
Mixed-layer CIN: -69 J/kg
Mixed-layer LCL: 592 m above ground
0-6 km bulk shear: 66 kt
0-1 km storm-relative helicity: 298 m²/s²
0-3 km storm-relative helicity: 390 m²/s²
Significant tornado parameter: 1.9
Supercell composite: 10.5

Open this sounding in Storm Lab

The text

As transmitted.

352 
WGUS54 KMOB 060835
FFWMOB
ALC023-061430-
/O.NEW.KMOB.FF.W.0002.200206T0835Z-200206T1430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mobile AL
235 AM CST Thu Feb 6 2020

The National Weather Service in Mobile has issued a

* Flash Flood Warning for...
  Northwestern Choctaw County in southwestern Alabama...

* Until 830 AM CST.

* At 233 AM CST, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Up to three inches of rain have 
  already fallen and additional storms producing heavy rain will 
  continue over the next 1 to 2 hours. Flash flooding is ongoing or 
  expected to begin shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Radar indicated.

  IMPACT...Flash 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 flooding include...
  Butler and Lisman. 

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 3231 8814 3203 8821 3188 8847 3231 8842

FLASH FLOOD...RADAR INDICATED

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 5, 6:02 PM CST	Special Weather Statement	MOB	Clarke	28 min
Feb 5, 6:16 PM CST	Special Weather Statement	MOB	Wilcox	29 min
Feb 5, 6:33 PM CST	Severe Thunderstorm Warning	MOB	Wilcox	27 min
Feb 6, 12:00 AM CST	Special Weather Statement	MOB	Crenshaw	45 min
Feb 6, 12:42 AM CST	Tornado Warning	MOB	Crenshaw	12 min
Feb 6, 1:07 AM CST	Severe Thunderstorm Warning	MOB	Choctaw	38 min
Feb 6, 1:56 AM CST	Areal Flood Advisory	MOB	Choctaw	3 hr
Feb 6, 2:35 AM CST	Severe Thunderstorm Warning	MOB	Wilcox	9 min
Feb 6, 3:26 AM CST	Special Weather Statement	MOB	Clarke	49 min
Feb 6, 3:43 AM CST	Severe Thunderstorm Warning	MOB	Clarke, Wilcox	47 min
Feb 6, 3:50 AM CST	Tornado Warning	MOB	Clarke, Wilcox	40 min
Feb 6, 4:39 AM CST	Special Weather Statement	MOB	Choctaw	51 min
Feb 6, 8:53 AM CST	Special Marine Warning	MOB		67 min
Feb 6, 9:10 AM CST	Special Weather Statement	MOB	Butler	50 min
Feb 6, 9:14 AM CST	Severe Thunderstorm Warning	MOB	Butler, Crenshaw	46 min
Feb 6, 9:53 AM CST	Special Marine Warning	MOB		67 min
Feb 6, 10:33 AM CST	Wind Advisory	MOB	Butler, Conecuh, Covington, Crenshaw, Escambia, Monroe	87 min
Feb 6, 10:55 AM CST	Special Marine Warning	MOB		65 min
Feb 6, 11:52 AM CST	Special Marine Warning	MOB		53 min
Feb 6, 11:53 AM CST	Special Marine Warning	MOB		37 min
Feb 6, 11:57 AM CST	Small Craft Advisory	MOB		27 hr
Feb 6, 12:06 PM CST	Wind Advisory	MOB	Baldwin, Mobile	18 hr

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.