Alert archive / Alabama / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 39, NWS Birmingham, AL

March 1, 2017Perry County, Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at Mar 1, 2017, 4:42 PM CST for Perry County, Alabama. It was in force for 37 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, 4:42 PM CST (22:42 UTC)
Expired: Mar 1, 2017, 5:19 PM CST
In force: 37 min
Issued by: NWS Birmingham, AL
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Perry County, AL

The radar

The Birmingham radar (KBMX), 63 km from the middle of the area, began a volume at 22:42 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, 10.7 hours before the alert went out and 63 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.

742 
WUUS54 KBMX 012242
SVRBMX
ALC105-012330-
/O.NEW.KBMX.SV.W.0039.170301T2242Z-170301T2330Z/

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

The National Weather Service in Birmingham has issued a

* Severe Thunderstorm Warning for...
  Northern Perry County in Alabama...

* Until 530 PM CST

* At 442 PM CST, a severe thunderstorm was located near Greensboro,
  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...
  Heiberger, Morgan Springs, Oakmulgee and Ellards. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3283 8747 3283 8742 3288 8742 3287 8732
      3283 8732 3284 8702 3273 8702 3268 8703
      3268 8704 3270 8748
TIME...MOT...LOC 2242Z 270DEG 40KT 3277 8752 

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

87/GRANTHAM

3 follow-up statements

292 
WWUS54 KBMX 012304
SVSBMX

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

ALC105-012330-
/O.CON.KBMX.SV.W.0039.000000T0000Z-170301T2330Z/
Perry AL-
504 PM CST WED MAR 1 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM CST
FOR NORTHEASTERN PERRY COUNTY...

At 504 PM CST, a severe thunderstorm was located near Heiberger, or
10 miles northeast of Marion, 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...
Heiberger, Ellards and Oakmulgee. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3269 8731 3283 8731 3284 8702 3273 8702
      3268 8703 3268 8704
TIME...MOT...LOC 2304Z 270DEG 40KT 3277 8723 

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

87/GRANTHAM

521 
WWUS54 KBMX 012314
SVSBMX

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

ALC105-012330-
/O.CON.KBMX.SV.W.0039.000000T0000Z-170301T2330Z/
Perry AL-
514 PM CST WED MAR 1 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM CST
FOR NORTHEASTERN PERRY COUNTY...

At 514 PM CST, a severe thunderstorm was located 9 miles southwest of
Talladega National Forest, or 12 miles south of Brent, 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...
Oakmulgee.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3269 8718 3283 8718 3284 8702 3273 8702
      3268 8703 3268 8704
TIME...MOT...LOC 2314Z 270DEG 40KT 3277 8710 

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

87/GRANTHAM

860 
WWUS54 KBMX 012319
SVSBMX

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

ALC105-012329-
/O.CAN.KBMX.SV.W.0039.000000T0000Z-170301T2330Z/
Perry AL-
519 PM CST WED MAR 1 2017

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN PERRY COUNTY IS
CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore the warning has been cancelled.

A severe thunderstorm watch remains in effect until 900 PM CST for
south central Alabama.

LAT...LON 3269 8718 3283 8718 3284 8702 3273 8702
      3268 8703 3268 8704
TIME...MOT...LOC 2318Z 270DEG 40KT 3277 8703 

$$

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, 4:49 PM CST	Severe Thunderstorm Warning	BMX	Coosa	56 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.