Alert archive / Alabama / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 335, NWS Birmingham, AL

June 26, 2011Blount County, Etowah County, Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at Jun 26, 2011, 2:53 PM CDT for Blount County, Etowah County, Alabama. It was in force for 52 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: Jun 26, 2011, 2:53 PM CDT (19:53 UTC)
Expired: Jun 26, 2011, 3:45 PM CDT
In force: 52 min
Issued by: NWS Birmingham, AL
Area: Storm-based polygon

Counties Blount County, AL, Etowah County, AL

The radar

The Northeast Alabama radar (KHTX), 89 km from the middle of the area, began a volume at 19:56 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
Jun 26, 3:00 PM CDT	TSTM WND DMG	5 S Arab, AL	SEVERAL TREES WERE KNOCKED DOWN. TWO HOMES LOST METAL PORCH ROOFS, AND ONE LOST A UTILITY ROOM ROOF.
Jun 26, 3:30 PM CDT	TSTM WND DMG	Sardis City, AL	TREE DOWN ON BROADWAY STREET IN SARDIS CITY.

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

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched one storm report to this severe thunderstorm warning; the first came 37 minutes after it went out.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jun 26, 12:05 PM CDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 7.9 hours before the alert went out and 116 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: 2353 J/kg
Mixed-layer CIN: -43 J/kg
Mixed-layer LCL: 872 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: -91 m²/s²
0-3 km storm-relative helicity: -54 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.

586 
WUUS54 KBMX 261953
SVRBMX
ALC009-055-262045-
/O.NEW.KBMX.SV.W.0335.110626T1953Z-110626T2045Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BIRMINGHAM AL
253 PM CDT SUN JUN 26 2011

THE NATIONAL WEATHER SERVICE IN BIRMINGHAM HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN BLOUNT COUNTY IN ALABAMA...
  NORTHERN ETOWAH COUNTY IN NORTHEAST ALABAMA...

* UNTIL 345 PM CDT

* AT 251 PM CDT...THE NATIONAL WEATHER SERVICE INDICATED A LINE OF
  SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
  OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM 5
  MILES EAST OF MCLARTY TO 6 MILES EAST OF CULLMAN...AND MOVING EAST
  AT 25 MPH.

* LOCATIONS IMPACTED INCLUDE...
  BLOUNTSVILLE...SNEAD...SARDIS CITY...SUSAN MOORE...WALNUT GROVE...
  REECE CITY...TABOR ROAD AND CHAMBLEES MILL.

THIS INCLUDES...
INTERSTATE 59 EXIT NUMBER 188...

WINDS OF 60 TO 70 MPH WILL BREAK LARGE TREE LIMBS AND CAUSE SOME
DAMAGE...ESPECIALLY TO SMALLER STRUCTURES.

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 3425 8644 3411 8630 3419 8619 3419 8612
      3421 8610 3420 8585 3416 8584 3410 8584
      3401 8644 3402 8672 3409 8669 3409 8668
      3412 8661 3425 8653 3427 8648
TIME...MOT...LOC 1953Z 287DEG 22KT 3419 8630 3414 8673

$$

27

1 follow-up statement

193 
WWUS54 KBMX 262010
SVSBMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
310 PM CDT SUN JUN 26 2011

ALC009-055-262045-
/O.CON.KBMX.SV.W.0335.000000T0000Z-110626T2045Z/
BLOUNT AL-ETOWAH AL-
310 PM CDT SUN JUN 26 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHERN
ETOWAH AND NORTHEASTERN BLOUNT COUNTIES UNTIL 345 PM CDT...

AT 305 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING
FROM BOAZ TO BLOUNTSVILLE...MOVING EAST AT 25 MPH.

LOCATIONS IMPACTED INCLUDE...
  BLOUNTSVILLE...SNEAD...SARDIS CITY...SUSAN MOORE...WALNUT GROVE...
  REECE CITY...TABOR ROAD...MOUNTAINBORO...FOWLER SPRING AND HENDRIX.

THIS INCLUDES...
INTERSTATE 59 EXIT NUMBER 188...

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

LAT...LON 3425 8644 3411 8630 3419 8619 3419 8612
      3421 8610 3420 8585 3416 8584 3410 8584
      3401 8644 3402 8672 3409 8669 3409 8668
      3412 8661 3425 8653 3427 8648
TIME...MOT...LOC 2010Z 287DEG 22KT 3416 8618 3411 8661

$$

27

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Birmingham, AL wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 26, 12:51 PM CDT, 2 hours 2 minutes earlier.

Area forecast discussion, Jun 26, 12:51 PM CDT, 2 hours 2 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BIRMINGHAM AL
1251 PM CDT SUN JUN 26 2011

.UPDATE...AVIATION DISCUSSION.

&&

.DISCUSSION...

IMPRESSIVE OUTFLOW BOUNDARY EVIDENT ON VISIBLE SATELLITE IMAGERY
THIS MORNING...WHICH HOLDS THE BULK OF OUR ATTENTION WITH REGARD TO
THIS AFTERNOON'S FORECAST. CONDITIONS ARE BECOMING INCREASINGLY
UNSTABLE WITH DAYTIME HEATING...AND THE 12Z BMX SOUNDING POSTED A
NOT-TOO-SHABBY 1.74 INCHES OF PRECIPITABLE WATER. GIVEN THESE
FACTORS...I AM INCLINED TO BUMP UP POPS TO THE 40-50 PERCENT RANGE
IN OUR NORTHERN COUNTIES FOR THIS AFTERNOON. I'LL KEEP THE 20-30
PERCENT IN THE SOUTH...ONLY BECAUSE I AM NOT SURE HOW FAR SOUTH ANY
CONVECTION COULD GET BEFORE 00Z.

THE CHANGE TO POPS WILL BE THE ONLY BIG CHANGE WITH THIS UPDATE.
TEMPERATURES ARE CLIMBING QUICKLY...BUT PRETTY MUCH ON SCHEDULE TO
REACH HIGHS IN THE 90S.

/61/

&&

.AVIATION...18Z TAF DISCUSSION.

OUTFLOW BOUNDARY FROM EARLIER STORMS IN TENNESSEE HAS PUSHED INTO
NORTHERN ALABAMA...AND ANOTHER BATCH OF STORMS HAS DEVELOPED IN THE
WESTERN HALF OF TENNESSEE. CONDITIONS IN CENTRAL ALABAMA ARE QUITE
UNSTABLE...AND THERE IS GROWING CONFIDENCE THAT THE CURRENT AREA OF
STORMS WILL RIDE ALONG THE PREVIOUS OUTFLOW BOUNDARY AND EXPAND IN
COVERAGE THROUGH THE AFTERNOON AS IT PUSHES SOUTH. THUS...I HAVE
ENOUGH CONFIDENCE TO TRY TO TIME THE STORMS' ARRIVAL INTO BHM...
TCL...EET...AND ANB...AS INDICATED BY THE VCTS IN THE FORECAST. IF
THE STORMS DO CONTINUE TO MOVE AND DEVELOP SOUTHWARD...AND
CONFIDENCE GROWS EVEN MORE...THEN WE WILL UPDATE THE RESPECTIVE TAFS
TO GET EVEN MORE SPECIFIC ON AFFECTS AND TIMING.

OUTSIDE OF THUNDERSTORM AREAS CONDITIONS WILL BE PREDOMINANTLY
VFR...WITH CUMULUS LEVEL CLOUDS DISSIPATING AFTER DARK AND REFORMING
AFTER SUNRISE MONDAY. ANY LOCATIONS THAT GET SUBSTANTIAL RAIN THIS
AFTERNOON OR EVENING WILL HAVE AN INCREASED CHANCE OF FOG FORMATION
EARLY MONDAY MORNING.

/61/

NOTICE...KEET TAF WILL HAVE (AMD LTD TO VIS WIND AND WX) AMENDED TO
THE END OF THE FORECAST UNTIL FURTHER NOTICE. THE CEILOMETER DATA
WILL BE GOING THROUGH NUMEROUS TESTS AND MONITORED FOR ACCURACY.

16

&&

.BMX WATCHES/WARNINGS/ADVISORIES...
NONE.

&&

Hazardous weather outlook, Jun 26, 1:08 PM CDT, 1 hour 45 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BIRMINGHAM AL
108 PM CDT SUN JUN 26 2011

ALZ011>015-017>050-271800-
AUTAUGA-BARBOUR-BIBB-BLOUNT-BULLOCK-CALHOUN-CHAMBERS-CHEROKEE-
CHILTON-CLAY-CLEBURNE-COOSA-DALLAS-ELMORE-ETOWAH-FAYETTE-GREENE-HALE-
JEFFERSON-LAMAR-LEE-LOWNDES-MACON-MARENGO-MARION-MONTGOMERY-PERRY-
PICKENS-PIKE-RANDOLPH-RUSSELL-SHELBY-ST CLAIR-SUMTER-TALLADEGA-
TALLAPOOSA-TUSCALOOSA-WALKER-WINSTON-
108 PM CDT SUN JUN 26 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE COUNTIES SERVED BY THE
NATIONAL WEATHER SERVICE OFFICE IN BIRMINGHAM.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

A LINE OF THUNDERSTORMS WILL LIKELY MOVE ACROSS PORTIONS OF CENTRAL
ALABAMA...BETWEEN 3 PM THIS AFTERNOON AND 8 PM THIS EVENING.  A FEW
OF THESE STORMS WILL BE STRONG TO SEVERE...POTENTIALLY PRODUCING
DAMAGING STRAIGHT-LINE WINDS AND LARGE HAIL. THE STORMS WILL ALSO
PRODUCE LOCALLY HEAVY RAIN AND FREQUENT LIGHTNING STRIKES. THE AREA
MOST LIKELY TO EXPERIENCE SEVERE STORMS IS FROM THE CITIES OF
VERNON...FAYETTE...BIRMINGHAM...AND ANNISTON...NORTHWARD.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY.

STRONG TO SEVERE STORMS ARE POSSIBLE AREAWIDE ON TUESDAY INTO
TUESDAY NIGHT...AS A FRONTAL BOUNDARY WILL TRY TO WORK INTO THE
AREA. THE MAIN THREATS WILL BE LARGE HAIL...DAMAGING STRAIGHT-
LINE WINDS...AND HEAVY DOWNPOURS. THERE ARE STILL SOME TIMING
DIFFERENCES THAT WILL NEED TO BE MONITORED OVER THE NEXT FEW DAYS.

.SPOTTER INFORMATION STATEMENT...

ACTIVATION OF STORM SPOTTERS AND EMERGENCY MANAGEMENT MAY BE NEEDED
THIS AFTERNOON AS WELL AS TUESDAY.

61

In the hours before

Local storm report, Jun 26, 10:15 AM CDT, 4 hours 38 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
1015 AM CDT SUN JUN 26 2011

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0635 PM     TSTM WND DMG     2 S HEFLIN              33.62N 85.59W
06/24/2011                   CLEBURNE           AL   EMERGENCY MNGR

            TREES DOWN ALONG INTERSTATE 20.

&&

08

Special weather statement, Jun 26, 2:23 PM CDT, 30 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
223 PM CDT SUN JUN 26 2011

ALZ017-262000-
BLOUNT AL-
223 PM CDT SUN JUN 26 2011

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN BLOUNT COUNTY UNTIL
300 PM CDT...

AT 219 PM CDT...THE NATIONAL WEATHER SERVICE WAS TRACKING A STRONG
THUNDERSTORM 5 MILES NORTHWEST OF BLOUNTSVILLE...MOVING EAST AT 15
MPH.

PEA SIZE HAIL AND WIND GUSTS UP TO 40 MPH ARE EXPECTED WITH THIS
STORM.

LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...
  BLOUNTSVILLE...
  STRAWBERRY...
  BROOKSVILLE...
  SNEAD...
  MCLARTY...

&&

LAT...LON 3420 8640 3410 8630 3407 8633 3402 8634
      3408 8670 3409 8670 3409 8668 3412 8663
      3413 8661 3418 8656 3426 8652 3426 8644
TIME...MOT...LOC 1923Z 277DEG 13KT 3416 8660

27

Special weather statement, Jun 26, 2:45 PM CDT, 8 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
245 PM CDT SUN JUN 26 2011

ALZ050-262015-
BARBOUR AL-
245 PM CDT SUN JUN 26 2011

...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL BARBOUR COUNTY UNTIL 315
PM CDT...

AT 242 PM CDT...THE NATIONAL WEATHER SERVICE WAS TRACKING A STRONG
THUNDERSTORM NEAR TEXASVILLE...OR 12 MILES EAST OF CLIO...MOVING
NORTHWEST AT 5 MPH.

HAIL UP TO ONE-HALF INCH IN DIAMETER AND WIND GUSTS UP TO 40 MPH ARE
EXPECTED WITH THIS STORM...ALONG WITH FREQUENT DANGEROUS LIGHTNING.

LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...
  CLIO...
  TYLER CROSSROADS...
  GAINO...
  MILLERS FORD...

IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A
STURDY BUILDING.

&&

LAT...LON 3170 8563 3195 8538 3174 8527 3170 8533
      3170 8541 3164 8541 3162 8543
TIME...MOT...LOC 1945Z 139DEG 6KT 3175 8542

61

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 25, 7:40 PM CDT	Special Weather Statement	BMX	Russell	50 min
Jun 26, 2:23 PM CDT	Special Weather Statement	BMX	Blount	37 min
Jun 26, 2:35 PM CDT	Severe Thunderstorm Warning	BMX	Fayette, Lamar, Marion, Walker, Winston	40 min
Jun 26, 2:45 PM CDT	Special Weather Statement	BMX	Barbour	30 min
Jun 26, 3:16 PM CDT	Special Weather Statement	BMX	Fayette, Lamar, Marion, Walker	59 min
Jun 26, 3:21 PM CDT	Severe Thunderstorm Warning	BMX	Blount	24 min
Jun 26, 3:30 PM CDT	Special Weather Statement	BMX	DeKalb	30 min
Jun 26, 3:45 PM CDT	Severe Thunderstorm Warning	BMX	Blount, Cherokee, Etowah, St. Clair	45 min
Jun 26, 3:52 PM CDT	Special Weather Statement	BMX	Pike	23 min
Jun 26, 4:03 PM CDT	Special Weather Statement	BMX	Bullock	27 min
Jun 26, 4:03 PM CDT	Severe Thunderstorm Warning	BMX	Calhoun, Cherokee, Cleburne, Etowah, Jefferson, St. Clair and 2 more	42 min
Jun 26, 4:10 PM CDT	Special Weather Statement	BMX	Fayette, Lamar, Pickens, Tuscaloosa	50 min
Jun 26, 4:11 PM CDT	Severe Thunderstorm Warning	BMX	Barbour, Bullock, Pike	24 min
Jun 26, 4:14 PM CDT	Special Weather Statement	BMX	Lee	46 min
Jun 26, 4:41 PM CDT	Severe Thunderstorm Warning	BMX	Bibb, Chilton, Clay, Cleburne, Coosa, Randolph and 3 more	49 min
Jun 26, 4:55 PM CDT	Special Weather Statement	BMX	Lee	50 min
Jun 26, 4:59 PM CDT	Severe Thunderstorm Warning	BMX	Chambers, Lee	31 min
Jun 26, 5:04 PM CDT	Special Weather Statement	BMX	Russell	41 min
Jun 26, 5:28 PM CDT	Severe Thunderstorm Warning	BMX	Autauga, Chambers, Chilton, Clay, Coosa, Elmore and 2 more	47 min
Jun 26, 6:13 PM CDT	Special Weather Statement	BMX	Bullock, Lee, Lowndes, Macon, Montgomery, Russell	47 min
Jun 26, 6:18 PM CDT	Severe Thunderstorm Warning	BMX	Lee	42 min
Jun 26, 6:28 PM CDT	Flash Flood Warning	BMX	Lee	3 hr

Nearby

Severe Thunderstorm Warnings in Alabama, 2011 Every severe thunderstorm warning in 2011

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.