Alert archive / Alabama / Special Weather Statements in 2017

Special Weather Statement, NWS Mobile, AL

August 23, 2017Baldwin County, Alabama

NWS Mobile, AL issued this special weather statement at Aug 23, 2017, 6:21 PM CDT for Baldwin County, Alabama. It was in force for 39 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
Aug 23, 2017, 6:21 PM CDT (23:21 UTC)
Expired
Aug 23, 2017, 7:00 PM CDT
In force
39 min
Issued by
NWS Mobile, AL

County Baldwin County, AL

The radar

The Mobile radar (KMOB), 67 km from the middle of the area, began a volume at 23:23 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, 11.4 hours before the alert went out and 209 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-pSkew-T log-p diagram, Slidell Radar S, LA at 12:00Z on 2017-08-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1666 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Slidell Radar S, LA at 12:00Z on 2017-08-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -13 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
1666 J/kg
Mixed-layer CIN
-37 J/kg
Mixed-layer LCL
840 m above ground
0-6 km bulk shear
7 kt
0-1 km storm-relative helicity
-13 m²/s²
0-3 km storm-relative helicity
-5 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

426 
WWUS84 KMOB 232321
SPSMOB

Special Weather Statement
National Weather Service Mobile AL
621 PM CDT WED AUG 23 2017
 
ALZ262-264-266-FLZ201-240000-
Baldwin Coastal AL-Baldwin Central AL-Baldwin Inland AL-
Escambia Inland FL-
621 PM CDT WED AUG 23 2017

...A CLUSTER OF STRONG THUNDERSTORMS WILL AFFECT THE FOLLOWING
COUNTIES...SOUTHEASTERN BALDWIN AND NORTHWESTERN ESCAMBIA COUNTIES
UNTIL 700 PM CDT...

At 619 PM CDT, the strong thunderstorms were located along a line
extending from 6 miles northwest of Barrineau Park to near Elsanor, 
and were moving southwest at 15 mph.

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

Locations impacted include...
Foley, Robertsdale, Loxley, Summerdale, Silverhill and Elberta. 

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.

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

&&

LAT...LON 3043 8778 3071 8775 3090 8757 3088 8734
      3054 8741 3052 8745 3051 8745 3050 8743
      3035 8757
TIME...MOT...LOC 2319Z 050DEG 15KT 3082 8752 3056 8750 3051 8760 

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 23, 5:06 PM CDTSpecial Weather StatementMOBBaldwin39 min
Aug 23, 5:36 PM CDTSpecial Weather StatementMOBBaldwin39 min
Aug 23, 5:52 PM CDTAreal Flood AdvisoryMOBBaldwin3 hr
Aug 23, 6:26 PM CDTSpecial Weather StatementMOBConecuh34 min
Aug 23, 3:03 PM CDTSpecial Weather StatementMOBOkaloosa, Santa Rosa42 min
Aug 23, 4:19 PM CDTSpecial Weather StatementMOBOkaloosa41 min
Aug 23, 3:38 PM CDTSpecial Weather StatementMOBGeorge52 min

Nearby

Special Weather Statements in Alabama, 2017Every special weather statement in 2017

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.