Alert archive / Alabama / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 93, NWS Birmingham, AL

July 21, 20164 counties in Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at Jul 21, 2016, 8:29 PM CDT for 4 counties in Alabama. It was in force for 46 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jul 21, 2016, 8:29 PM CDT (01:29 UTC)
Expired: Jul 21, 2016, 9:15 PM CDT
In force: 46 min
Issued by: NWS Birmingham, AL
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Calhoun County, AL, Clay County, AL, Cleburne County, AL, Randolph County, AL

The radar

The Birmingham radar (KBMX), 99 km from the middle of the area, began a volume at 01:32 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.

What was reported inside it

Time	Report	Where	Remark
Jul 21, 8:29 PM CDT	TSTM WND DMG	5 Ese Anniston, AL	TREES AND POWER LINES WERE BLOWN DOWN ALONG HIGHWAY 78 NEAR KAPCO DRIVE.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Birmingham, AL (KBMX), launched 00:00Z, 1.5 hours before the alert went out and 99 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: 1430 J/kg
Mixed-layer CIN: -45 J/kg
Mixed-layer LCL: 1510 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 42 m²/s²
0-3 km storm-relative helicity: 58 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 2.6

Open this sounding in Storm Lab

The text

As transmitted.

933 
WUUS54 KBMX 220129
SVRBMX
ALC015-027-029-111-220215-
/O.NEW.KBMX.SV.W.0093.160722T0129Z-160722T0215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BIRMINGHAM AL
829 PM CDT THU JUL 21 2016

THE NATIONAL WEATHER SERVICE IN BIRMINGHAM HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHWESTERN CLEBURNE COUNTY IN EAST CENTRAL ALABAMA...
  NORTHEASTERN CLAY COUNTY IN EAST CENTRAL ALABAMA...
  NORTHWESTERN RANDOLPH COUNTY IN EAST CENTRAL ALABAMA...
  SOUTHEASTERN CALHOUN COUNTY IN EAST CENTRAL ALABAMA...

* UNTIL 915 PM CDT

* AT 828 PM CDT...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
  EXTENDING FROM NEAR HEFLIN TO NEAR DELTA...MOVING WEST AT 10 MPH.

  HAZARD...60 MPH WIND GUSTS AND PENNY SIZE HAIL. 

  SOURCE...RADAR INDICATED. 

  IMPACT...EXPECT DAMAGE TO ROOFS...SIDING...AND TREES. 

* LOCATIONS IMPACTED INCLUDE...
  ANNISTON...OXFORD...HEFLIN...LINEVILLE...OXFORD LAKE...BARFIELD...
  DELTA...FOSTERS CROSS ROADS...MOUNT CHEAHA...CHALAFINNEE...
  CHOCCOLOCCO...DEARMANVILLE...HOLLIS CROSSROADS AND CAMP SEQUOYAH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

TORRENTIAL RAINFALL IS OCCURRING WITH THESE STORMS...AND MAY LEAD TO
FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS.

&&

LAT...LON 3332 8589 3350 8586 3350 8585 3354 8580
      3358 8580 3359 8584 3367 8583 3373 8561
      3337 8553
TIME...MOT...LOC 0128Z 091DEG 7KT 3366 8569 3350 8566 

HAIL...0.75IN
WIND...60MPH
 
$$

75

1 follow-up statement

358 
WWUS54 KBMX 220142
SVSBMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
842 PM CDT THU JUL 21 2016

ALC015-027-029-111-220215-
/O.CON.KBMX.SV.W.0093.000000T0000Z-160722T0215Z/
CLEBURNE AL-CLAY AL-RANDOLPH AL-CALHOUN AL-
842 PM CDT THU JUL 21 2016

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 915 PM CDT
FOR SOUTHWESTERN CLEBURNE...NORTHEASTERN CLAY...NORTHWESTERN RANDOLPH
AND SOUTHEASTERN CALHOUN COUNTIES...

AT 841 PM CDT...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
EXTENDING FROM NEAR ANNISTON TO NEAR DELTA...MOVING SOUTH SOUTHWEST
AT 10 MPH.

HAZARD...60 MPH WIND GUSTS AND PENNY SIZE HAIL. 

SOURCE...RADAR INDICATED. 

IMPACT...EXPECT DAMAGE TO ROOFS...SIDING...AND TREES. 

LOCATIONS IMPACTED INCLUDE...
ANNISTON...OXFORD...HEFLIN...LINEVILLE...OXFORD LAKE...BARFIELD...
DELTA...FOSTERS CROSS ROADS...MOUNT CHEAHA...CHALAFINNEE...
CHOCCOLOCCO...DEARMANVILLE...HOLLIS CROSSROADS AND CAMP SEQUOYAH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

TORRENTIAL RAINFALL IS OCCURRING WITH THESE STORMS...AND MAY LEAD TO
FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS.

&&

LAT...LON 3332 8589 3350 8586 3350 8585 3354 8580
      3358 8580 3359 8584 3367 8583 3373 8561
      3337 8553
TIME...MOT...LOC 0141Z 091DEG 7KT 3366 8572 3350 8569 

HAIL...0.75IN
WIND...60MPH
 
$$

75

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 21, 7:39 PM CDT	Special Weather Statement	BMX	Marengo	36 min
Jul 21, 7:58 PM CDT	Special Weather Statement	BMX	Randolph	47 min
Jul 21, 8:06 PM CDT	Severe Thunderstorm Warning	BMX	Calhoun, Clay, Cleburne, Randolph	24 min
Jul 21, 8:14 PM CDT	Special Weather Statement	BMX	Marengo	31 min
Jul 21, 8:20 PM CDT	Areal Flood Advisory	BMX	Montgomery	115 min
Jul 21, 8:46 PM CDT	Special Weather Statement	BMX	Talladega	29 min
Jul 21, 8:48 PM CDT	Special Weather Statement	BMX	Chambers, Lee	42 min
Jul 21, 8:51 PM CDT	Special Weather Statement	BMX	Etowah	24 min
Jul 21, 8:58 PM CDT	Special Weather Statement	BMX	Calhoun	32 min
Jul 21, 9:12 PM CDT	Special Weather Statement	BMX	Cherokee	48 min
Jul 21, 9:21 PM CDT	Special Weather Statement	BMX	Etowah	24 min
Jul 21, 9:22 PM CDT	Special Weather Statement	BMX	Clay	38 min
Jul 21, 9:25 PM CDT	Special Weather Statement	BMX	Coosa	50 min
Jul 21, 9:55 PM CDT	Special Weather Statement	BMX	Clay, Talladega	50 min
Jul 21, 10:00 PM CDT	Special Weather Statement	BMX	Chilton, Coosa	30 min
Jul 21, 10:02 PM CDT	Special Weather Statement	BMX	Calhoun, Cherokee	28 min
Jul 21, 10:32 PM CDT	Special Weather Statement	BMX	Chilton, Coosa, Shelby	28 min
Jul 21, 10:34 PM CDT	Special Weather Statement	BMX	Calhoun, St. Clair	26 min
Jul 21, 11:02 PM CDT	Special Weather Statement	BMX	Chilton	28 min
Jul 21, 11:25 PM CDT	Special Weather Statement	BMX	Cleburne	35 min
Jul 21, 11:28 PM CDT	Special Weather Statement	BMX	Bibb, Chilton	47 min
Jul 22, 12:02 AM CDT	Special Weather Statement	BMX	Autauga, Perry	43 min
Jul 22, 4:14 PM CDT	Special Weather Statement	BMX	Marion	31 min
Jul 22, 4:42 PM CDT	Special Weather Statement	BMX	Marion	48 min
Jul 22, 4:47 PM CDT	Special Weather Statement	BMX	Sumter	28 min
Jul 22, 4:48 PM CDT	Special Weather Statement	BMX	Winston	27 min
Jul 22, 5:09 PM CDT	Special Weather Statement	BMX	Pickens	36 min
Jul 22, 5:20 PM CDT	Special Weather Statement	BMX	Jefferson	40 min
Jul 22, 5:28 PM CDT	Special Weather Statement	BMX	Walker	47 min
Jul 22, 5:31 PM CDT	Special Weather Statement	BMX	Winston	44 min
Jul 22, 5:39 PM CDT	Special Weather Statement	BMX	Lamar	36 min
Jul 22, 6:00 PM CDT	Special Weather Statement	BMX	Walker	30 min
Jul 22, 6:31 PM CDT	Special Weather Statement	BMX	Jefferson	29 min
Jul 22, 6:58 PM CDT	Special Weather Statement	BMX	Jefferson	32 min
Jul 22, 6:59 PM CDT	Special Weather Statement	BMX	Tuscaloosa	31 min

Nearby

Severe Thunderstorm Warnings in Alabama, 2016 Every severe thunderstorm warning in 2016

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.