Alert archive / Alabama / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 29, NWS Birmingham, AL

March 1, 2017Walker County, Winston County, Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at Mar 1, 2017, 2:15 PM CST for Walker County, Winston 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: Mar 1, 2017, 2:15 PM CST (20:15 UTC)
Expired: Mar 1, 2017, 3:00 PM CST
In force: 45 min
Issued by: NWS Birmingham, AL
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Walker County, AL, Winston County, AL

The radar

The Birmingham radar (KBMX), 97 km from the middle of the area, began a volume at 20:14 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, 11:48 AM CST	Tornado Watch	SPC	6 hr

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 8.3 hours before the alert went out and 96 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.

249 
WUUS54 KBMX 012015
SVRBMX
ALC127-133-012100-
/O.NEW.KBMX.SV.W.0029.170301T2015Z-170301T2100Z/

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

The National Weather Service in Birmingham has issued a

* Severe Thunderstorm Warning for...
  Northern Walker County in Alabama...
  Southern Winston County in northwestern Alabama...

* Until 300 PM CST

* At 215 PM CST, a severe thunderstorm was located near Eldridge, or
  near Carbon Hill, moving east at 50 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...
  Jasper, Carbon Hill, Arley, Kansas, Nauvoo, Eldridge, Curry, Camp
  McDowell, Smith Dam, Ashbank, Smith Lake, Poplar Springs, Falls
  City, Maple Branch, Little Dismal Creek, Coon Creek, Lupton, Battle
  Branch, Hidden Cove Campground and Wilson Bend.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

A tornado watch remains in effect until 600 PM CST for northwestern,
west central Alabama.

LAT...LON 3399 8711 3399 8715 3397 8714 3396 8711
      3394 8710 3392 8708 3391 8709 3388 8764
      3400 8764 3409 8711
TIME...MOT...LOC 2015Z 262DEG 44KT 3395 8758 

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

87/GRANTHAM

2 follow-up statements

118 
WWUS54 KBMX 012026
SVSBMX

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

ALC127-133-012100-
/O.CON.KBMX.SV.W.0029.000000T0000Z-170301T2100Z/
Walker AL-Winston AL-
226 PM CST WED MAR 1 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 300 PM CST
FOR NORTHERN WALKER AND SOUTHEASTERN WINSTON COUNTIES...

At 225 PM CST, a severe thunderstorm was located over Nauvoo, or near
Carbon Hill, moving east at 40 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...
Jasper, Carbon Hill, Arley, Nauvoo, Curry, Camp McDowell, Smith Dam,
Ashbank, Smith Lake, Poplar Springs, Falls City, Maple Branch, Little
Dismal Creek, Coon Creek, Lupton, Battle Branch, Hidden Cove
Campground, Wilson Bend, Devils Branch and Seymour Branch.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

A tornado watch remains in effect until 600 PM CST for northwestern
Alabama.

LAT...LON 3389 8754 3401 8756 3409 8711 3399 8711
      3399 8715 3397 8714 3396 8711 3394 8710
      3392 8708 3391 8709
TIME...MOT...LOC 2025Z 265DEG 36KT 3395 8747 

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

87/GRANTHAM

090 
WWUS54 KBMX 012041
SVSBMX

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

ALC127-133-012100-
/O.CON.KBMX.SV.W.0029.000000T0000Z-170301T2100Z/
Walker AL-Winston AL-
241 PM CST WED MAR 1 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 300 PM CST
FOR NORTHEASTERN WALKER AND SOUTHEASTERN WINSTON COUNTIES...

At 240 PM CST, a severe thunderstorm was located near Curry, or 7
miles north of Jasper, moving east at 50 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...
Jasper, Curry, Camp McDowell, Smith Dam, Smith Lake, Falls City,
Poplar Springs, Maple Branch, Wilson Bend, Devils Branch, Seymour
Branch, Duncan Bridge, Little Dismal Creek, Bear Branch, Coon Creek,
Raccoon Branch, Battle Branch, Hidden Cove Campground, Butler Branch
and Walker County Airport.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

A tornado watch remains in effect until 600 PM CST for northwestern
Alabama.

LAT...LON 3390 8737 3403 8739 3408 8715 3409 8711
      3399 8711 3399 8715 3397 8714 3396 8711
      3394 8710 3392 8708 3391 8709
TIME...MOT...LOC 2040Z 261DEG 42KT 3396 8729 

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, 2:37 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, 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.