Alert archive / Alabama / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 40, NWS Birmingham, AL

March 1, 2017Coosa County, Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at Mar 1, 2017, 4:49 PM CST for Coosa County, Alabama. It was in force for 56 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: Mar 1, 2017, 4:49 PM CST (22:49 UTC)
Expired: Mar 1, 2017, 5:45 PM CST
In force: 56 min
Issued by: NWS Birmingham, AL
Area: Storm-based polygon
Hail: 1.5 in
Wind: 70.0 mph

County Coosa County, AL

The radar

The Birmingham radar (KBMX), 42 km from the middle of the area, began a volume at 22:49 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Mar 1, 3:43 PM CST	Severe Thunderstorm Watch	SPC	4 hr

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 10.8 hours before the alert went out and 43 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: 246 J/kg
Mixed-layer CIN: -8 J/kg
Mixed-layer LCL: 549 m above ground
0-6 km bulk shear: 61 kt
0-1 km storm-relative helicity: 290 m²/s²
0-3 km storm-relative helicity: 372 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 3.3

Open this sounding in Storm Lab

The text

As transmitted.

699 
WUUS54 KBMX 012249
SVRBMX
ALC037-012345-
/O.NEW.KBMX.SV.W.0040.170301T2249Z-170301T2345Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Birmingham AL
449 PM CST WED MAR 1 2017

The National Weather Service in Birmingham has issued a

* Severe Thunderstorm Warning for...
  Central Coosa County in east central Alabama...

* Until 545 PM CST

* At 449 PM CST, a severe thunderstorm was located over Gap Of The
  Mountain, or near Clanton, moving east at 45 mph.

  HAZARD...70 mph wind gusts and ping pong ball size hail. 

  SOURCE...Radar indicated. 

  IMPACT...People and animals outdoors will be injured. Expect hail 
           damage to roofs, siding, windows, and vehicles. Expect 
           considerable tree damage. Wind damage is also likely to 
           mobile homes, roofs, and outbuildings. 

* Locations impacted include...
  Goodwater, Rockford, Kellyton, Weogufka, Hanover, Lyle, Dollar,
  Bradford, Cottage Grove, Bentleyville, Highway 9 and Highway 22,
  Unity, Moriah, Hatchet, Crewsville, Lay Lake Dam, Mitchell Lake,
  Lay Lake, Fishpond and Ray.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3286 8645 3287 8646 3287 8648 3291 8649
      3293 8651 3297 8652 3298 8651 3299 8651
      3300 8652 3301 8652 3307 8601 3285 8601
TIME...MOT...LOC 2249Z 268DEG 39KT 3291 8659 

HAIL...1.50IN
WIND...70MPH
 
$$

87/GRANTHAM

3 follow-up statements

662 
WWUS54 KBMX 012313
SVSBMX

Severe Weather Statement
National Weather Service Birmingham AL
513 PM CST WED MAR 1 2017

ALC037-012345-
/O.CON.KBMX.SV.W.0040.000000T0000Z-170301T2345Z/
Coosa AL-
513 PM CST WED MAR 1 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM CST
FOR CENTRAL COOSA COUNTY...

At 513 PM CST, a severe thunderstorm was located over Bentleyville,
or near Rockford, moving east at 45 mph.

HAZARD...60 mph wind gusts and quarter size hail. 

SOURCE...Radar indicated. 

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees. 

Locations impacted include...
Rockford, Kellyton, Hanover, Lyle, Bradford, Cottage Grove,
Bentleyville, Highway 9 and Highway 22, Moriah, Hatchet, Crewsville,
Fishpond, Ray and Hissop.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3286 8642 3300 8636 3303 8601 3285 8601
TIME...MOT...LOC 2313Z 268DEG 39KT 3292 8627 

HAIL...1.00IN
WIND...60MPH
 
$$

87/GRANTHAM

829 
WWUS54 KBMX 012329
SVSBMX

Severe Weather Statement
National Weather Service Birmingham AL
529 PM CST WED MAR 1 2017

ALC037-012345-
/O.CON.KBMX.SV.W.0040.000000T0000Z-170301T2345Z/
Coosa AL-
529 PM CST WED MAR 1 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM CST
FOR EAST CENTRAL COOSA COUNTY...

At 529 PM CST, a severe thunderstorm was located over Crewsville, or
near Rockford, moving east at 35 mph.

HAZARD...60 mph wind gusts and quarter size hail. 

SOURCE...Radar indicated. 

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees. 

Locations impacted include...
Rockford, Kellyton, Highway 9 and Highway 22, Cottage Grove,
Crewsville, Fishpond, Hissop and Ray.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3286 8635 3296 8625 3299 8601 3285 8601
TIME...MOT...LOC 2329Z 272DEG 32KT 3290 8615 

HAIL...1.00IN
WIND...60MPH
 
$$

87/GRANTHAM

421 
WWUS54 KBMX 012335
SVSBMX

Severe Weather Statement
National Weather Service Birmingham AL
535 PM CST WED MAR 1 2017

ALC037-012345-
/O.CON.KBMX.SV.W.0040.000000T0000Z-170301T2345Z/
Coosa AL-
535 PM CST WED MAR 1 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM CST
FOR EAST CENTRAL COOSA COUNTY...

At 535 PM CST, a severe thunderstorm was located over Highway 9 and
Highway 22, or near Kellyton, moving east at 45 mph.

HAZARD...60 mph wind gusts and quarter size hail. 

SOURCE...Radar indicated. 

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees. 

Locations impacted include...
Kellyton, Cottage Grove, Highway 9 and Highway 22, Crewsville,
Fishpond and Ray.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3285 8615 3297 8615 3299 8601 3285 8601
TIME...MOT...LOC 2335Z 268DEG 39KT 3290 8607 

HAIL...1.00IN
WIND...60MPH
 
$$

87/GRANTHAM

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 1, 1:06 PM CST	Severe Thunderstorm Warning	BMX	Marion	24 min
Mar 1, 2:07 PM CST	Severe Thunderstorm Warning	BMX	Fayette, Lamar	38 min
Mar 1, 2:09 PM CST	Special Weather Statement	BMX	Winston	51 min
Mar 1, 2:15 PM CST	Severe Thunderstorm Warning	BMX	Walker, Winston	45 min
Mar 1, 2:37 PM CST	Severe Thunderstorm Warning	BMX	Fayette, Walker	53 min
Mar 1, 2:55 PM CST	Severe Thunderstorm Warning	BMX	Blount	23 min
Mar 1, 3:22 PM CST	Special Weather Statement	BMX	Jefferson	53 min
Mar 1, 3:28 PM CST	Severe Thunderstorm Warning	BMX	Jefferson	47 min
Mar 1, 3:29 PM CST	Severe Thunderstorm Warning	BMX	Hale	31 min
Mar 1, 3:44 PM CST	Severe Thunderstorm Warning	BMX	Bibb	46 min
Mar 1, 3:48 PM CST	Special Weather Statement	BMX	Jefferson	42 min
Mar 1, 3:55 PM CST	Severe Thunderstorm Warning	BMX	Greene, Sumter	34 min
Mar 1, 4:00 PM CST	Special Weather Statement	BMX	St. Clair	45 min
Mar 1, 4:04 PM CST	Special Weather Statement	BMX	Sumter	56 min
Mar 1, 4:12 PM CST	Severe Thunderstorm Warning	BMX	Hale	48 min
Mar 1, 4:18 PM CST	Severe Thunderstorm Warning	BMX	Calhoun, St. Clair	57 min
Mar 1, 4:21 PM CST	Severe Thunderstorm Warning	BMX	Chilton	42 min
Mar 1, 4:31 PM CST	Special Weather Statement	BMX	Shelby	29 min
Mar 1, 4:42 PM CST	Severe Thunderstorm Warning	BMX	Perry	37 min
Mar 1, 5:02 PM CST	Severe Thunderstorm Warning	BMX	Cleburne	28 min
Mar 1, 5:51 PM CST	Severe Thunderstorm Warning	BMX	Tallapoosa	24 min

Nearby

Severe Thunderstorm Warnings in Alabama, 2017 Every severe thunderstorm warning 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.