Alert archive / Alabama / Special Weather Statements in 2020

Special Weather Statement, NWS Birmingham, AL

August 20, 2020Bullock County, Alabama

NWS Birmingham, AL issued this special weather statement at Aug 20, 2020, 11:15 AM CDT for Bullock 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: Aug 20, 2020, 11:15 AM CDT (16:15 UTC)
Expired: Aug 20, 2020, 12:00 PM CDT
In force: 45 min
Issued by: NWS Birmingham, AL

County Bullock County, AL

The radar

The Ft Rucker radar (KEOX), 59 km from the middle of the area, began a volume at 16:15 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 12:00Z, 4.3 hours before the alert went out and 174 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: 70 J/kg
Mixed-layer CIN: -242 J/kg
Mixed-layer LCL: 1018 m above ground
0-6 km bulk shear: 3 kt
0-1 km storm-relative helicity: 109 m²/s²
0-3 km storm-relative helicity: 98 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

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

NWS Birmingham, AL wrote its last area forecast discussion before this special weather statement went out at Aug 20, 6:47 AM CDT, 4 hours 28 minutes earlier.

Area forecast discussion, Aug 20, 6:47 AM CDT, 4 hours 28 minutes before

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Hazardous weather outlook, Aug 20, 3:51 AM CDT, 7 hours 24 minutes before

Hazardous Weather Outlook
National Weather Service Birmingham AL
351 AM CDT Thu Aug 20 2020

ALZ011>015-017>050-211200-
Marion-Lamar-Fayette-Winston-Walker-Blount-Etowah-Calhoun-Cherokee-
Cleburne-Pickens-Tuscaloosa-Jefferson-Shelby-St. Clair-Talladega-
Clay-Randolph-Sumter-Greene-Hale-Perry-Bibb-Chilton-Coosa-Tallapoosa-
Chambers-Marengo-Dallas-Autauga-Lowndes-Elmore-Montgomery-Macon-
Bullock-Lee-Russell-Pike-Barbour-
351 AM CDT Thu Aug 20 2020

This Hazardous Weather Outlook is for the counties served by the
National Weather Service office in Birmingham.

.DAY ONE...Outlook through Tonight.

Strong to severe thunderstorms are possible this afternoon and
evening, mainly along and southeast of a line from Aliceville, to
Jasper, to Gadsden. Damaging wind gusts up to 60 mph and hail up to
quarter size are the main hazards.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

Strong to severe thunderstorms are possible Friday afternoon and
evening. Damaging wind gusts up to 60 mph and hail up to quarter size
are possible.

.SPOTTER INFORMATION STATEMENT...

Activation of storm spotters and emergency management may be needed
this afternoon and evening, and again on Friday. Please follow all
local, state, and CDC guidelines in regards to travel.

In the hours before

Special weather statement, Aug 20, 10:35 AM CDT, 40 minutes before

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Special weather statement, Aug 20, 10:48 AM CDT, 27 minutes before

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Special weather statement, Aug 20, 11:15 AM CDT, 0 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 19, 7:47 PM CDT	Special Weather Statement	BMX	Coosa	43 min
Aug 19, 7:56 PM CDT	Special Weather Statement	BMX	Elmore	34 min
Aug 19, 8:05 PM CDT	Areal Flood Advisory	BMX	Chambers, Randolph	115 min
Aug 19, 8:31 PM CDT	Special Weather Statement	BMX	Elmore	44 min
Aug 19, 8:34 PM CDT	Special Weather Statement	BMX	Tallapoosa	26 min
Aug 19, 8:45 PM CDT	Flash Flood Warning	BMX	Chambers, Randolph	3 hr
Aug 19, 8:52 PM CDT	Special Weather Statement	BMX	Tallapoosa	38 min
Aug 19, 9:14 PM CDT	Areal Flood Advisory	BMX	Elmore	3 hr
Aug 19, 9:20 PM CDT	Special Weather Statement	BMX	Montgomery	40 min
Aug 19, 9:23 PM CDT	Flash Flood Warning	BMX	Elmore	3 hr
Aug 19, 9:38 PM CDT	Severe Thunderstorm Warning	BMX	Elmore, Montgomery	37 min
Aug 19, 9:43 PM CDT	Areal Flood Advisory	BMX	Elmore, Montgomery	2 hr
Aug 19, 10:01 PM CDT	Areal Flood Advisory	BMX	Coosa, Tallapoosa	2 hr
Aug 19, 10:05 PM CDT	Flash Flood Warning	BMX	Elmore, Montgomery	3 hr
Aug 20, 10:35 AM CDT	Special Weather Statement	BMX	Pike	40 min
Aug 20, 10:48 AM CDT	Special Weather Statement	BMX	Barbour	42 min
Aug 20, 11:52 AM CDT	Special Weather Statement	BMX	Barbour	23 min
Aug 20, 1:19 PM CDT	Special Weather Statement	BMX	Elmore	41 min
Aug 20, 1:40 PM CDT	Special Weather Statement	BMX	Montgomery	35 min
Aug 20, 3:40 PM CDT	Special Weather Statement	BMX	Hale	35 min
Aug 20, 3:58 PM CDT	Special Weather Statement	BMX	Bibb	32 min
Aug 20, 5:26 PM CDT	Special Weather Statement	BMX	Blount	34 min
Aug 20, 5:38 PM CDT	Special Weather Statement	BMX	Hale	37 min
Aug 20, 6:10 PM CDT	Special Weather Statement	BMX	Etowah	35 min
Aug 20, 6:24 PM CDT	Special Weather Statement	BMX	Etowah	36 min
Aug 20, 6:29 PM CDT	Severe Thunderstorm Warning	BMX	Etowah	27 min

Nearby

Special Weather Statements in Alabama, 2020 Every special weather statement in 2020

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.