Alert archive / Alabama / Special Weather Statements in 2021

Special Weather Statement, NWS Mobile, AL

July 20, 2021Baldwin County, Alabama

NWS Mobile, AL issued this special weather statement at Jul 20, 2021, 7:00 AM CDT for Baldwin County, Alabama. It was in force for 45 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 20, 2021, 7:00 AM CDT (12:00 UTC)
Expired: Jul 20, 2021, 7:45 AM CDT
In force: 45 min
Issued by: NWS Mobile, AL

County Baldwin County, AL

The radar

The Mobile radar (KMOB), 41 km from the middle of the area, began a volume at 12:03 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, 0.0 hours before the alert went out and 182 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: 737 J/kg
Mixed-layer CIN: -32 J/kg
Mixed-layer LCL: 628 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 53 m²/s²
0-3 km storm-relative helicity: 57 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.4

Open this sounding in Storm Lab

The text

As transmitted.

662 
WWUS84 KMOB 201200
SPSMOB

Special Weather Statement
National Weather Service Mobile AL
700 AM CDT Tue Jul 20 2021
 
ALZ262-264-266-201245-
Baldwin Coastal AL-Baldwin Central AL-Baldwin Inland AL-
700 AM CDT Tue Jul 20 2021

...CLUSTER OF STRONG THUNDERSTORMS WILL AFFECT THE FOLLOWING 
COUNTIES... SOUTHWESTERN BALDWIN COUNTY UNTIL 745 AM CDT...

At 659 AM CDT, strong thunderstorm were located 4 miles north of 
Magnolia Springs, or 7 miles east of Point Clear, moving north at 25 
mph.

Winds in excess of 30 mph will be possible with these storms.

Locations impacted include...
Daphne, Fairhope, Foley, Spanish Fort, Robertsdale, Loxley, Magnolia
Springs, Stapleton, Summerdale and Silverhill.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with these storms, and may 
lead to localized flooding. Do not drive your vehicle through 
flooded roadways.

&&

LAT...LON 3037 8784 3039 8781 3041 8782 3039 8785
      3038 8784 3041 8791 3051 8792 3055 8790
      3065 8792 3064 8792 3065 8793 3075 8792
      3087 8794 3076 8792 3086 8790 3078 8755
      3059 8754 3033 8764
TIME...MOT...LOC 1159Z 192DEG 20KT 3045 8780 

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 20, 7:53 AM CDT	Areal Flood Advisory	MOB	Baldwin	3 hr
Jul 20, 8:10 AM CDT	Special Marine Warning	MOB		65 min
Jul 20, 9:30 AM CDT	Areal Flood Advisory	MOB	Baldwin	3 hr
Jul 20, 10:03 AM CDT	Areal Flood Advisory	MOB	Baldwin, Escambia	3 hr
Jul 20, 11:05 AM CDT	Special Weather Statement	MOB	Covington	55 min
Jul 20, 12:23 PM CDT	Areal Flood Advisory	MOB	Butler, Covington, Crenshaw	3 hr
Jul 20, 3:06 PM CDT	Areal Flood Advisory	MOB	Clarke, Washington	3 hr
Jul 20, 10:20 AM CDT	Areal Flood Advisory	MOB	Wayne	3 hr

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.