Alert archive / Alabama / Special Weather Statements in 2021

Special Weather Statement, NWS Mobile, AL

May 11, 2021Washington County, Alabama

NWS Mobile, AL issued this special weather statement at May 11, 2021, 12:49 PM CDT for Washington County, Alabama. It was in force for 41 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: May 11, 2021, 12:49 PM CDT (17:49 UTC)
Expired: May 11, 2021, 1:30 PM CDT
In force: 41 min
Issued by: NWS Mobile, AL

County Washington County, AL

The radar

The Mobile radar (KMOB), 71 km from the middle of the area, began a volume at 17:48 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

Slidell Radar S, LA (KSIL), launched 12:00Z, 5.8 hours before the alert went out and 205 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: 2600 J/kg
Mixed-layer CIN: -4 J/kg
Mixed-layer LCL: 469 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 15 m²/s²
0-3 km storm-relative helicity: 56 m²/s²
Significant tornado parameter: 0.6
Supercell composite: 3.1

Open this sounding in Storm Lab

The text

As transmitted.

739 
WWUS84 KMOB 111749
SPSMOB

Special Weather Statement
National Weather Service Mobile AL
1249 PM CDT Tue May 11 2021
 
ALZ052-053-055-056-059-262-111830-
Clarke AL-Baldwin Inland AL-Monroe AL-Conecuh AL-Escambia AL-
Washington AL-
1249 PM CDT Tue May 11 2021

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT THE FOLLOWING
COUNTIES...SOUTHWESTERN MONROE...NORTHWESTERN BALDWIN...SOUTHERN
WASHINGTON...SOUTHEASTERN CLARKE...NORTHWESTERN ESCAMBIA AND
SOUTHWESTERN CONECUH COUNTIES UNTIL 130 PM CDT...

At 1248 PM CDT, the strong thunderstorms were located along a line
extending from 3 miles northwest of Deer Park to 4 miles southeast of
McIntosh to 11 miles northeast of Stockton, and moving northeast at
30 mph.

Wind gusts of 40 to 50 mph will be possible with these storms.

Locations impacted include...
Jackson, McCullough, Wagarville, Leroy, Uriah, Tibbie, Calvert,
McIntosh, I65 And AL 113 and Poarch Creek Reservation.

LAT...LON 3144 8742 3127 8710 3102 8776 3110 8796
      3115 8794 3115 8797 3117 8799 3114 8802
      3114 8805 3126 8844 3129 8844 3154 8803
TIME...MOT...LOC 1748Z 245DEG 26KT 3127 8835 3122 8799 3113 8777 

$$

Black

The office that day

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

Issued	Product	Office	Counties	Lasted
May 11, 3:22 AM CDT	Flash Flood Watch	MOB	Baldwin, Choctaw, Clarke, Conecuh, Escambia, Mobile and 2 more	36 hr
May 11, 9:46 AM CDT	River Flood Warning	MOB	Clarke, Washington	23 hr
May 11, 12:37 PM CDT	Special Marine Warning	MOB		83 min
May 11, 12:54 PM CDT	Areal Flood Advisory	MOB	Mobile, Washington	3 hr
May 11, 1:44 PM CDT	Special Marine Warning	MOB		46 min
May 11, 2:02 PM CDT	Special Marine Warning	MOB		58 min
May 11, 2:36 PM CDT	Areal Flood Advisory	MOB	Baldwin	3 hr
May 11, 2:59 PM CDT	Special Marine Warning	MOB		2 hr
May 11, 4:52 PM CDT	Special Marine Warning	MOB		57 min
May 11, 5:18 PM CDT	Special Marine Warning	MOB		32 min
May 11, 6:03 PM CDT	Special Marine Warning	MOB		57 min
May 11, 1:29 PM CDT	Special Weather Statement	MOB	Escambia	46 min
May 11, 2:14 PM CDT	Special Weather Statement	MOB	Escambia	46 min
May 11, 2:51 PM CDT	Special Weather Statement	MOB	Santa Rosa	39 min
May 11, 3:31 PM CDT	Special Weather Statement	MOB	Okaloosa	59 min
May 11, 3:58 PM CDT	Areal Flood Advisory	MOB	Okaloosa, Santa Rosa	3 hr
May 11, 4:09 PM CDT	Flash Flood Warning	MOB	Okaloosa	3 hr
May 11, 11:49 AM CDT	Special Weather Statement	MOB	George	41 min
May 11, 12:12 PM CDT	Special Weather Statement	MOB	Greene	48 min

Nearby

Special Weather Statements in Alabama, 2021 Every special weather statement 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.