Alert archive / Alabama / Special Weather Statements in 2021

Special Weather Statement, NWS Birmingham, AL

August 1, 2021Marengo County, Alabama

NWS Birmingham, AL issued this special weather statement at Aug 1, 2021, 8:47 PM CDT for Marengo County, Alabama. It was in force for 43 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 1, 2021, 8:47 PM CDT (01:47 UTC)
Expired: Aug 1, 2021, 9:30 PM CDT
In force: 43 min
Issued by: NWS Birmingham, AL

County Marengo County, AL

The radar

The Birmingham radar (KBMX), 137 km from the middle of the area, began a volume at 01:50 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, 1.8 hours before the alert went out and 137 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: 941 J/kg
Mixed-layer CIN: -57 J/kg
Mixed-layer LCL: 1260 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: 6 m²/s²
0-3 km storm-relative helicity: 15 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

370 
WWUS84 KBMX 020147
SPSBMX

Special Weather Statement
National Weather Service Birmingham AL
847 PM CDT Sun Aug 1 2021
 
ALZ030-039-040-020230-
Sumter AL-Marengo AL-Dallas AL-
847 PM CDT Sun Aug 1 2021

...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL MARENGO...SOUTHWESTERN
DALLAS AND SOUTHWESTERN SUMTER COUNTIES UNTIL 930 PM CDT...

At 847 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Kinterbish to near Orrville. Movement was
southeast at 10 mph.

Winds in excess of 40 mph will be possible with these storms.

Locations impacted include...
Linden, Cuba, Thomaston, Sweet Water, Orrville, Myrtlewood, Dayton,
Nanafalia, Consul, Central Mills, Dannelly Reservoir, Freddie Jones
Field, Magnolia, Wayne, Miller, Kinterbish, Half Acre, Tompkinsville,
Carleys and Octagon.

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 3243 8840 3243 8809 3233 8806 3235 8753
      3231 8752 3231 8742 3235 8742 3236 8727
      3214 8718 3215 8728 3224 8740 3227 8751
      3213 8752 3211 8762 3207 8809 3208 8805
      3228 8802 3228 8794 3231 8793 3231 8837
TIME...MOT...LOC 0147Z 316DEG 10KT 3235 8824 3230 8732 

$$

32/Davis

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 1, 9:11 PM CDT	Severe Thunderstorm Warning	BMX	Marengo	49 min
Aug 1, 9:25 PM CDT	Special Weather Statement	BMX	Dallas	50 min
Aug 1, 9:31 PM CDT	Areal Flood Advisory	BMX	Marengo	3 hr
Aug 1, 10:02 PM CDT	Special Weather Statement	BMX	Marengo	43 min
Aug 1, 11:08 PM CDT	Special Weather Statement	BMX	Sumter	52 min
Aug 2, 12:24 AM CDT	Special Weather Statement	BMX	Hale	51 min
Aug 2, 1:15 AM CDT	Special Weather Statement	BMX	Montgomery	30 min
Aug 2, 11:37 AM CDT	Special Weather Statement	BMX	Marengo	38 min
Aug 2, 1:52 PM CDT	Special Weather Statement	BMX	Bullock	38 min
Aug 2, 2:56 PM CDT	Special Weather Statement	BMX	Montgomery	34 min
Aug 2, 3:13 PM CDT	Special Weather Statement	BMX	Montgomery	32 min
Aug 2, 3:29 PM CDT	Severe Thunderstorm Warning	BMX	Elmore, Macon, Montgomery	25 min
Aug 2, 4:18 PM CDT	Special Weather Statement	BMX	Russell	27 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.