Alert archive / Alabama / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 430, NWS Birmingham, AL

October 9, 2009Marion County, Winston County, Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at Oct 9, 2009, 2:38 PM CDT for Marion County, Winston County, Alabama. It was in force for 52 min. 1 report 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: Oct 9, 2009, 2:38 PM CDT (19:38 UTC)
Expired: Oct 9, 2009, 3:30 PM CDT
In force: 52 min
Issued by: NWS Birmingham, AL
Area: Storm-based polygon

Counties Marion County, AL, Winston County, AL

The radar

The Columbus AFB radar (KGWX), 55 km from the middle of the area, began a volume at 19:40 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
Oct 9, 2:45 PM CDT	HAIL 0.75	3 W Hamilton, AL	PENNY SIZED HAIL REPORTED 3 MILES WEST OF HAMILTON.

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, 7.6 hours before the alert went out and 145 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: 614 J/kg
Mixed-layer CIN: -32 J/kg
Mixed-layer LCL: 537 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 145 m²/s²
0-3 km storm-relative helicity: 193 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 4.2

Open this sounding in Storm Lab

The text

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

000 
WUUS54 KBMX 091938
SVRBMX
ALC093-133-092030-
/O.NEW.KBMX.SV.W.0430.091009T1938Z-091009T2030Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BIRMINGHAM AL
238 PM CDT FRI OCT 9 2009

THE NATIONAL WEATHER SERVICE IN BIRMINGHAM HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  MARION COUNTY IN NORTHWEST ALABAMA...
  THIS INCLUDES THE CITY OF HAMILTON...
  NORTHWESTERN WINSTON COUNTY IN NORTHWEST ALABAMA...
  THIS INCLUDES THE CITY OF HALEYVILLE...

* UNTIL 330 PM CDT

* AT 237 PM CDT...THE NATIONAL WEATHER SERVICE DETECTED A SEVERE
  THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60
  MPH.  THIS STORM WAS LOCATED 6 MILES SOUTHWEST OF WESTON

..AND MOVING NORTHEAST AT 50 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  HAMILTON AND WESTON BY 245 PM CDT...
  BRINN BY 255 PM CDT...
  HACKLEBURG BY 300 PM CDT...
  7 MILES NORTHWEST OF HALEYVILLE BY 310 PM CDT...
  7 MILES NORTHWEST OF NEEDMORE BY 315 PM CDT...

THIS INCLUDES...
US 78 EXIT NUMBERS 7 THROUGH 16

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THE NATIONAL WEATHER SERVICE HAS DETECTED SOME WEAK ROTATION WITHIN
THIS STORM. WHILE NOT IMMEDIATELY LIKELY...A TORNADO MAY STILL
DEVELOP. IF A TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF
SAFETY IN A STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR
ROOM.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 700 PM CDT FRIDAY
EVENING FOR NORTHERN ALABAMA.

&&

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

LAT...LON 3431 8739 3418 8754 3402 8797 3403 8798
      3406 8799 3406 8808 3412 8817 3433 8790
TIME...MOT...LOC 1938Z 235DEG 42KT 3409 8807

$$

27

3 follow-up statements

000 
WWUS54 KBMX 091955
SVSBMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
255 PM CDT FRI OCT 9 2009

ALC093-133-092030-
/O.CON.KBMX.SV.W.0430.000000T0000Z-091009T2030Z/
WINSTON AL-MARION AL-
255 PM CDT FRI OCT 9 2009

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 330 PM CDT
FOR NORTHEASTERN MARION AND NORTHWESTERN WINSTON COUNTIES...

AT 254 PM CDT...NATIONAL WEATHER SERVICE CONTINUED TO DETECT A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 
MPH.  ALSO PENNY SIZE HAIL WAS REPORTED WITH THIS STORMS.  THIS 
STORM WAS LOCATED NEAR BRINN...OR 7 MILES NORTHEAST OF 
HAMILTON...MOVING NORTHEAST AT 50 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  TESSNER...HACKLEBURG AND BRINN BY 300 PM CDT...
  BEAR CREEK BY 305 PM CDT...
  6 MILES NORTHWEST OF HALEYVILLE BY 310 PM CDT...
  POSEY FIELD AIRPORT AND 6 MILES NORTHWEST OF NEEDMORE BY 315 PM
  CDT...
  6 MILES NORTHWEST OF PEBBLE BY 320 PM CDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 700 PM CDT FRIDAY
EVENING FOR NORTHERN ALABAMA.

&&

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

LAT...LON 3405 8790 3407 8797 3410 8801 3416 8803
      3433 8790 3431 8739 3418 8754
TIME...MOT...LOC 1955Z 235DEG 42KT 3420 8787

$$

27

000 
WWUS54 KBMX 092008
SVSBMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
308 PM CDT FRI OCT 9 2009

ALC093-133-092030-
/O.CON.KBMX.SV.W.0430.000000T0000Z-091009T2030Z/
WINSTON AL-MARION AL-
308 PM CDT FRI OCT 9 2009

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 330 PM CDT
FOR NORTHEASTERN MARION AND NORTHWESTERN WINSTON COUNTIES...

AT 308 PM CDT...NATIONAL WEATHER SERVICE CONTINUED TO DETECT A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING PENNY SIZE HAIL...AND DAMAGING
WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR BEAR CREEK...
OR 7 MILES NORTHWEST OF HALEYVILLE...MOVING NORTHEAST AT 50 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
DELMAR...NEEDMORE...POSEY FIELD AIRPORT AND PEBBLE

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 700 PM CDT FRIDAY
EVENING FOR NORTHERN ALABAMA.

&&

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

LAT...LON 3418 8754 3413 8777 3415 8782 3420 8785
      3431 8784 3431 8739
TIME...MOT...LOC 2008Z 235DEG 42KT 3428 8772

$$

27

000 
WWUS54 KBMX 092020
SVSBMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
320 PM CDT FRI OCT 9 2009

ALC093-092030-
/O.CAN.KBMX.SV.W.0430.000000T0000Z-091009T2030Z/
MARION AL-
320 PM CDT FRI OCT 9 2009

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

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 700 PM CDT FRIDAY
EVENING FOR NORTHERN ALABAMA.

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

LAT...LON 3418 8754 3418 8764 3421 8764 3425 8763
      3431 8764 3431 8739
TIME...MOT...LOC 2020Z 235DEG 42KT 3436 8758

$$

ALC133-092030-
/O.CON.KBMX.SV.W.0430.000000T0000Z-091009T2030Z/
WINSTON AL-
320 PM CDT FRI OCT 9 2009

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 330 PM CDT
FOR NORTHWESTERN WINSTON COUNTY...

AT 320 PM CDT...NATIONAL WEATHER SERVICE CONTINUED TO DETECT A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING PENNY SIZE HAIL...AND DAMAGING
WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR PEBBLE...OR 8
MILES NORTH OF HALEYVILLE...MOVING NORTHEAST AT 50 MPH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO 
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS 
IMMEDIATELY LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS. 
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE 
STRUCK BY LIGHTNING.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 700 PM CDT FRIDAY
EVENING FOR NORTHERN ALABAMA.

&&

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

LAT...LON 3418 8754 3418 8764 3421 8764 3425 8763
      3431 8764 3431 8739
TIME...MOT...LOC 2020Z 235DEG 42KT 3436 8758

$$

27

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 9, 2:22 PM CDT	Flash Flood Warning	BMX	Lamar	4 hr
Oct 9, 3:07 PM CDT	Tornado Warning	BMX	Lamar, Marion	38 min
Oct 9, 3:37 PM CDT	Severe Thunderstorm Warning	BMX	Fayette, Lamar, Marion, Walker, Winston	38 min
Oct 9, 3:51 PM CDT	Severe Thunderstorm Warning	BMX	Blount, Etowah, St. Clair	23 min
Oct 9, 3:56 PM CDT	Severe Thunderstorm Warning	BMX	Chilton, Coosa, Tallapoosa	27 min
Oct 9, 5:05 PM CDT	Severe Thunderstorm Warning	BMX	Blount, Walker	25 min
Oct 9, 5:12 PM CDT	Severe Thunderstorm Warning	BMX	Jefferson, Tuscaloosa	34 min
Oct 9, 5:14 PM CDT	Severe Thunderstorm Warning	BMX	Marengo	46 min
Oct 9, 5:28 PM CDT	Severe Thunderstorm Warning	BMX	Blount	47 min
Oct 9, 6:05 PM CDT	Severe Thunderstorm Warning	BMX	Blount, Etowah	25 min

Nearby

Severe Thunderstorm Warnings in Alabama, 2009 Every severe thunderstorm warning in 2009

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.