Alert archive / Alabama / Areal Flood Advisories in 2021

Areal Flood Advisory 124, NWS Mobile, AL

July 15, 2021Choctaw County, Washington County, Alabama; Wayne County, Mississippi

NWS Mobile, AL issued this areal flood advisory at Jul 15, 2021, 11:26 PM CDT for Choctaw County, Washington County, Alabama; Wayne County, Mississippi. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued: Jul 15, 2021, 11:26 PM CDT (04:26 UTC)
Expired: Jul 16, 2021, 2:30 AM CDT
In force: 3 hr
Issued by: NWS Mobile, AL
Area: Storm-based polygon

Counties Choctaw County, AL, Washington County, AL, Wayne County, MS

The radar

The Mobile radar (KMOB), 113 km from the middle of the area, began a volume at 04:28 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 00:00Z, 4.4 hours before the alert went out and 224 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: 1139 J/kg
Mixed-layer CIN: -11 J/kg
Mixed-layer LCL: 1445 m above ground
0-6 km bulk shear: 12 kt
0-1 km storm-relative helicity: 2 m²/s²
0-3 km storm-relative helicity: 0 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this areal flood advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Mobile, AL wrote its last area forecast discussion before this areal flood advisory went out at Jul 15, 10:19 PM CDT, 1 hour 7 minutes earlier.

Area forecast discussion, Jul 15, 10:19 PM CDT, 1 hour 7 minutes before

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In the hours before

Special weather statement, Jul 15, 5:41 PM CDT, 5 hours 45 minutes before

Special Weather Statement
National Weather Service Mobile AL
541 PM CDT Thu Jul 15 2021

ALZ055>058-060-160015-
Monroe AL-Conecuh AL-Butler AL-Covington AL-Crenshaw AL-
541 PM CDT Thu Jul 15 2021

...A STRONG THUNDERSTORM WILL AFFECT THE FOLLOWING COUNTIES...
BUTLER...NORTHEASTERN MONROE...CRENSHAW...CONECUH AND NORTHERN
COVINGTON COUNTIES UNTIL 715 PM CDT...

At 539 PM CDT, a strong thunderstorm was located 7 miles east of
Georgiana, or 11 miles south of Greenville, moving north at 10 mph.
Other intense thunderstorms in this statement area of south Central
Alabama will develop during the next 90 minutes ahead of an outflow
boundary moving gradually northward. each separate cell will have a
slow northward drift less than 10 mph.

Wind gusts of 45 to 55 mph will be possible with this storm.

Locations impacted include...
Andalusia, Greenville, Opp, Evergreen, Luverne, Georgiana, Brantley,
McKenzie, River Falls, Castleberry, Red Level, Rutledge, Dozier,
Repton, Heath, Gantt, Glenwood, Petrey, I65 And US 84 and Highland
Home.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 3153 8620 3113 8619 3127 8659 3128 8738
      3183 8693 3183 8691 3196 8682 3196 8641
      3205 8641 3205 8632 3197 8630 3196 8619
      3179 8620 3179 8615 3166 8615 3162 8618
      3162 8615 3154 8615
TIME...MOT...LOC 2239Z 187DEG 8KT 3167 8662

Special weather statement, Jul 15, 6:42 PM CDT, 4 hours 44 minutes before

Special Weather Statement
National Weather Service Mobile AL
642 PM CDT Thu Jul 15 2021

ALZ053>057-262-160115-
Clarke AL-Wilcox AL-Baldwin Inland AL-Monroe AL-Conecuh AL-Butler AL-
642 PM CDT Thu Jul 15 2021

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT THE FOLLOWING
COUNTIES...WESTERN BUTLER...MONROE...NORTH CENTRAL BALDWIN...
SOUTHEASTERN CLARKE...SOUTHEASTERN WILCOX AND CENTRAL CONECUH
COUNTIES UNTIL 815 PM CDT...

At 640 PM CDT, the strong thunderstorms were located along a line
extending from 10 miles north of Evergreen to near Repton to 9 miles
west of McCullough, and moving northwest at 10 mph.

The main impacts will be up to half inch hail and wind gusts of 40
to 50 mph within the statement area which now will affect portions
of interior southwest Alabama, mainly along and just northwest of
the I-65 Corridor during through 815 PM CDT.

Locations impacted include...
Monroeville, Jackson, Evergreen, Frisco City, Grove Hill, Peterman,
Georgiana, Uriah, Whatley, McKenzie, Excel, Beatrice, Vredenburgh,
Repton, Pine Apple and I65 And US 84.

LAT...LON 3152 8668 3126 8744 3126 8748 3123 8755
      3124 8762 3120 8762 3115 8775 3165 8797
      3205 8694 3205 8691
TIME...MOT...LOC 2340Z 129DEG 8KT 3158 8695 3138 8727 3120 8767

Special weather statement, Jul 15, 6:49 PM CDT, 4 hours 37 minutes before

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Special weather statement, Jul 15, 8:09 PM CDT, 3 hours 17 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 15, 7:12 PM CDT	Severe Thunderstorm Warning	MOB	Baldwin, Clarke, Monroe	48 min
Jul 15, 7:19 PM CDT	Severe Thunderstorm Warning	MOB	Clarke, Monroe, Wilcox	41 min
Jul 15, 7:27 PM CDT	Areal Flood Advisory	MOB	Conecuh, Escambia, Monroe	3 hr
Jul 15, 8:09 PM CDT	Special Weather Statement	MOB	Clarke, Wilcox	66 min
Jul 15, 8:21 PM CDT	Areal Flood Advisory	MOB	Wilcox	3 hr
Jul 15, 8:36 PM CDT	Flash Flood Warning	MOB	Wilcox	6 hr
Jul 15, 10:24 PM CDT	Areal Flood Advisory	MOB	Choctaw	3 hr
Jul 16, 10:17 AM CDT	Areal Flood Advisory	MOB	Baldwin	4 hr
Jul 16, 10:54 AM CDT	Flash Flood Warning	MOB	Baldwin	6 hr
Jul 16, 12:01 PM CDT	Areal Flood Advisory	MOB	Baldwin	3 hr
Jul 16, 12:23 PM CDT	Flash Flood Warning	MOB	Baldwin	3 hr
Jul 16, 1:41 PM CDT	Special Marine Warning	MOB		64 min
Jul 16, 3:04 PM CDT	Areal Flood Advisory	MOB	Clarke, Wilcox	3 hr
Jul 16, 11:44 AM CDT	Areal Flood Advisory	MOB	Escambia	3 hr
Jul 16, 11:29 AM CDT	Special Weather Statement	MOB	George	46 min
Jul 16, 12:26 PM CDT	Areal Flood Advisory	MOB	George	3 hr

Nearby

Areal Flood Advisories in Alabama, 2021 Areal Flood Advisories in Mississippi, 2021 Every areal flood advisory in 2021

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.