Alert archive / Alabama / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 69, NWS Birmingham, AL

March 27, 2017Jefferson County, Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at Mar 27, 2017, 7:22 PM CDT for Jefferson County, Alabama. It was in force for 38 min. 5 reports 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: Mar 27, 2017, 7:22 PM CDT (00:22 UTC)
Expired: Mar 27, 2017, 8:00 PM CDT
In force: 38 min
Issued by: NWS Birmingham, AL
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Jefferson County, AL

The radar

The Birmingham radar (KBMX), 37 km from the middle of the area, began a volume at 00:26 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
Mar 27, 7:35 PM CDT	TSTM WND DMG	1 S Kingston, AL	* 1 INJ * RELAYED REPORT OF A DOWNED TREE ONTO A CAR. 1 INJURY.
Mar 27, 7:36 PM CDT	TSTM WND DMG	1 Ene Kingston, AL	RELAYED REPORT OF A TREE BLOWN DOWN ONTO A HOUSE.
Mar 27, 7:37 PM CDT	TSTM WND DMG	1 Wsw Ruffner Mountain, AL	RELAYED REPORT OF SEVERAL TREES DOWN IN THIS AREA OF EAST BIRMINGHAM.
Mar 27, 7:42 PM CDT	TSTM WND DMG	1 N Ruffner Mountain, AL	RELAYED REPORT OF A TREE DOWNED ONTO A HOUSE.
Mar 27, 7:43 PM CDT	TSTM WND DMG	1 E Cloverdale, AL	RELAYED REPORT OF A LARGE TREE ONTO A HOUSE IN THE ROEBUCK AREA.

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

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 27, 1:54 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Birmingham, AL (KBMX), launched 00:00Z, 0.4 hours before the alert went out and 37 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: 127 J/kg
Mixed-layer CIN: -20 J/kg
Mixed-layer LCL: 1855 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 132 m²/s²
0-3 km storm-relative helicity: 200 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.1

Open this sounding in Storm Lab

The text

As transmitted.

734 
WUUS54 KBMX 280022
SVRBMX
ALC073-280100-
/O.NEW.KBMX.SV.W.0069.170328T0022Z-170328T0100Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Birmingham AL
722 PM CDT MON MAR 27 2017

The National Weather Service in Birmingham has issued a

* Severe Thunderstorm Warning for...
  Southeastern Jefferson County in Alabama...

* Until 800 PM CDT

* At 722 PM CDT, a severe thunderstorm was located over Brighton, or
  near Hueytown, moving northeast 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...
  Birmingham, Hoover, Vestavia Hills, Bessemer, Homewood, Mountain
  Brook, Trussville, Hueytown, Gardendale, Irondale, Leeds, Moody,
  Fairfield, Fultondale, Center Point, Pleasant Grove, Clay, Pinson,
  Tarrant and Midfield.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3366 8653 3363 8654 3362 8655 3356 8655
      3355 8652 3353 8652 3351 8657 3347 8661
      3347 8667 3342 8672 3342 8675 3337 8678
      3336 8683 3333 8683 3333 8689 3331 8695
      3336 8703 3346 8704 3377 8660 3376 8654
TIME...MOT...LOC 0022Z 241DEG 40KT 3343 8694 

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

17/KLAWS

1 follow-up statement

818 
WWUS54 KBMX 280038
SVSBMX

Severe Weather Statement
National Weather Service Birmingham AL
738 PM CDT MON MAR 27 2017

ALC073-280100-
/O.CON.KBMX.SV.W.0069.000000T0000Z-170328T0100Z/
Jefferson AL-
738 PM CDT MON MAR 27 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 PM CDT
FOR EAST CENTRAL JEFFERSON COUNTY...

At 737 PM CDT, a severe thunderstorm was located over eastern
Birmingham, moving northeast 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...
Birmingham, Vestavia Hills, Homewood, Mountain Brook, Trussville,
Gardendale, Irondale, Leeds, Moody, Fultondale, Center Point, Clay,
Pinson, Tarrant, Ketona Lakes, B.j.c.c., Chalkville, Kingston, Five
Points South and Grayson Valley.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3366 8653 3363 8654 3362 8655 3356 8655
      3355 8652 3353 8652 3351 8657 3347 8661
      3347 8667 3342 8672 3342 8675 3341 8681
      3345 8681 3358 8686 3377 8660 3376 8654
TIME...MOT...LOC 0037Z 241DEG 40KT 3352 8676 

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

17/KLAWS

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 27, 7:12 PM CDT	Severe Thunderstorm Warning	BMX	Cherokee, Etowah	63 min
Mar 27, 8:23 PM CDT	Special Weather Statement	BMX	Talladega	37 min
Mar 27, 8:29 PM CDT	Special Weather Statement	BMX	Cherokee, Etowah	46 min
Mar 27, 8:42 PM CDT	Special Weather Statement	BMX	Calhoun	33 min
Mar 27, 8:46 PM CDT	Severe Thunderstorm Warning	BMX	Cherokee, Etowah	29 min
Mar 27, 8:51 PM CDT	Special Weather Statement	BMX	Clay, Talladega	39 min
Mar 27, 10:42 PM CDT	Special Weather Statement	BMX	Marion, Winston	63 min
Mar 27, 11:16 PM CDT	Special Weather Statement	BMX	Tuscaloosa	44 min
Mar 27, 11:43 PM CDT	Special Weather Statement	BMX	Marion	62 min
Mar 28, 12:03 AM CDT	Special Weather Statement	BMX	Lamar	27 min
Mar 28, 12:12 AM CDT	Areal Flood Advisory	BMX	Marion, Winston	3 hr
Mar 28, 12:26 AM CDT	Special Weather Statement	BMX	Fayette	34 min
Mar 28, 2:24 AM CDT	Special Weather Statement	BMX	Walker	51 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.