Alert archive / Alabama / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 65, NWS Birmingham, AL

March 16, 2012Cherokee County, Etowah County, Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at Mar 16, 2012, 1:13 PM CDT for Cherokee County, Etowah County, Alabama. It was in force for 29 min. 2 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 16, 2012, 1:13 PM CDT (18:13 UTC)
Expired: Mar 16, 2012, 1:42 PM CDT
In force: 29 min
Issued by: NWS Birmingham, AL
Area: Storm-based polygon

Counties Cherokee County, AL, Etowah County, AL

The radar

The Northeast Alabama radar (KHTX), 83 km from the middle of the area, began a volume at 18:13 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 16, 1:16 PM CDT	HAIL 1.5	3 Sw Tabor Road, AL	PING PONG BALL SIZED HAIL REPORTED NEAR BLACK CREEK FIRE STATION.
Mar 16, 1:33 PM CDT	HAIL 1	2 Ssw Leesburg, AL	HAIL UP TO ONE INCH WAS OBSERVED AT CEDAR POINT CAMPGROUNDS ALONG THE NORTH SHORE OF WEISS LAKE.

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 12:00Z, 6.2 hours before the alert went out and 147 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: 769 J/kg
Mixed-layer CIN: -78 J/kg
Mixed-layer LCL: 1195 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 7 m²/s²
0-3 km storm-relative helicity: 68 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

317 
WUUS54 KBMX 161813
SVRBMX
ALC019-055-161900-
/O.NEW.KBMX.SV.W.0065.120316T1813Z-120316T1900Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BIRMINGHAM AL
113 PM CDT FRI MAR 16 2012

THE NATIONAL WEATHER SERVICE IN BIRMINGHAM HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WEST CENTRAL CHEROKEE COUNTY IN NORTHEAST ALABAMA...
  NORTHEASTERN ETOWAH COUNTY IN NORTHEAST ALABAMA...

* UNTIL 200 PM CDT

* AT 108 PM CDT...THE NATIONAL WEATHER SERVICE INDICATED A SEVERE
  THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING
  WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR TABOR
  ROAD...OR 11 MILES NORTH OF HOKES BLUFF...AND MOVING EAST AT 10
  MPH.

* LOCATIONS IMPACTED INCLUDE...
  CENTRE...TABOR ROAD...SLACKLAND...CHEROKEE ROCK VILLAGE...
  LEESBURG...SAND ROCK...WEISS DAM AND YELLOW CREEK FALLS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION...MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF
YOUR HOME OR BUSINESS.

&&

TO REPORT SEVERE WEATHER...
CALL 1-800-856-0758.

LAT...LON 3431 8568 3412 8566 3411 8592 3421 8593
      3421 8585 3424 8585 3425 8583 3424 8582
      3425 8582
TIME...MOT...LOC 1813Z 267DEG 9KT 3416 8589

$$

56

2 follow-up statements

776 
WWUS54 KBMX 161837
SVSBMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
137 PM CDT FRI MAR 16 2012

ALC055-161847-
/O.CAN.KBMX.SV.W.0065.000000T0000Z-120316T1900Z/
ETOWAH AL-
137 PM CDT FRI MAR 16 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN ETOWAH COUNTY IS
CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED 
AREA.

TO REPORT SEVERE WEATHER...CALL 1-800-856-0758.

LAT...LON 3426 8568 3412 8566 3411 8579 3413 8580
      3413 8581 3411 8584 3421 8584 3424 8579
TIME...MOT...LOC 1837Z 267DEG 15KT 3417 8576

$$

ALC019-161900-
/O.CON.KBMX.SV.W.0065.000000T0000Z-120316T1900Z/
CHEROKEE AL-
137 PM CDT FRI MAR 16 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR WEST CENTRAL
CHEROKEE COUNTY UNTIL 200 PM CDT...

AT 133 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR
LEESBURG...OR 6 MILES WEST OF CENTRE...MOVING EAST AT 15 MPH.

LOCATIONS IMPACTED INCLUDE...
  CENTRE...WEISS DAM AND YELLOW CREEK FALLS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS STORM HAS A HISTORY OF PRODUCING LARGE HAIL. SEEK SHELTER NOW
INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS.

&&

TO REPORT SEVERE WEATHER...CALL 1-800-856-0758.

LAT...LON 3426 8568 3412 8566 3411 8579 3413 8580
      3413 8581 3411 8584 3421 8584 3424 8579
TIME...MOT...LOC 1837Z 267DEG 15KT 3417 8576

$$

56

208 
WWUS54 KBMX 161842
SVSBMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
142 PM CDT FRI MAR 16 2012

ALC019-161852-
/O.CAN.KBMX.SV.W.0065.000000T0000Z-120316T1900Z/
CHEROKEE AL-
142 PM CDT FRI MAR 16 2012

...THE SEVERE THUNDERSTORM WARNING FOR WEST CENTRAL CHEROKEE COUNTY
IS CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY.

TO REPORT SEVERE WEATHER...CALL 1-800-856-0758.

LAT...LON 3426 8568 3412 8566 3411 8579 3413 8580
      3413 8581 3411 8584 3421 8584 3424 8579
TIME...MOT...LOC 1842Z 267DEG 15KT 3417 8573

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 15, 9:18 PM CDT	Special Weather Statement	BMX	Marion	27 min
Mar 15, 9:25 PM CDT	Special Weather Statement	BMX	DeKalb	50 min
Mar 15, 10:40 PM CDT	Special Weather Statement	BMX	Walker	50 min
Mar 16, 12:54 PM CDT	Special Weather Statement	BMX	Marion	36 min
Mar 16, 1:02 PM CDT	Special Weather Statement	BMX	Calhoun, Cherokee, Etowah	43 min
Mar 16, 1:27 PM CDT	Severe Thunderstorm Warning	BMX	Cherokee	15 min
Mar 16, 2:17 PM CDT	Severe Thunderstorm Warning	BMX	Randolph	26 min
Mar 16, 2:52 PM CDT	Severe Thunderstorm Warning	BMX	Cherokee	38 min
Mar 16, 3:01 PM CDT	Special Weather Statement	BMX	Winston	44 min
Mar 16, 3:04 PM CDT	Severe Thunderstorm Warning	BMX	Winston	26 min

Nearby

Severe Thunderstorm Warnings in Alabama, 2012 Every severe thunderstorm warning in 2012

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.