Alert archive / Alabama / Special Weather Statements in 2011

Special Weather Statement, NWS Birmingham, AL

June 17, 2011Walker County, Alabama

NWS Birmingham, AL issued this special weather statement at Jun 17, 2011, 10:49 AM CDT for Walker County, Alabama. It was in force for 26 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: Jun 17, 2011, 10:49 AM CDT (15:49 UTC)
Expired: Jun 17, 2011, 11:15 AM CDT
In force: 26 min
Issued by: NWS Birmingham, AL

County Walker County, AL

The radar

The Birmingham radar (KBMX), 69 km from the middle of the area, began a volume at 15:51 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 nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 3.8 hours before the alert went out and 68 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: 1495 J/kg
Mixed-layer CIN: -92 J/kg
Mixed-layer LCL: 688 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 33 m²/s²
0-3 km storm-relative helicity: 29 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.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Jun 17, 6:29 AM CDT, 4 hours 20 minutes earlier.

Area forecast discussion, Jun 17, 6:29 AM CDT, 4 hours 20 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BIRMINGHAM AL
629 AM CDT FRI JUN 17 2011

.UPDATE...FOR 12Z AVIATION.

&&

.DISCUSSION...

WHAT'S LEFT OF THE OVERNIGHT CONVECTION IS QUICKLY DIMINISHING AS
IT PUSHES EWD ACROSS THE NE PART OF THE STATE. ANOTHER ROUND OF
SCATTERED TSTMS IS EXPECTED LATER TODAY AS YET ANOTHER UPPER LEVEL
SHORTWAVE SLIDES SEWD ACROSS THE AREA. DO NOT ANTICIPATE ANY
WIDESPREAD SEVERE WEATHER...HOWEVER STRONG GUSTY WINDS AND SMALL
HAIL WILL BE POSSIBLE WITH THE STRONGER STORMS. AS WAS THE CASE
THE LAST FEW NIGHTS...SOME OF STORMS COULD LINGER THRU THE EVNG
HRS AS NEW CONVECTION DEVELOPS ALONG OUTFLOW BOUNDARIES.

THE UPPER RIDGE WILL REALLY BEGIN TO BUILD EWD INTO THE REGION
OVER THE WEEKEND. A FEW STORMS WILL BE POSSIBLE ON SAT...MAINLY
ACROSS THE EAST...SO KEPT SLIGHT CHANCE POPS IN FOR THAT AREA. BY
SUNDAY...RAIN CHANCES SHOULD COME TO AN END AS THE RIDGE TAKES
CONTROL OF THE WEATHER PATTERN. DRY CONDITIONS WILL PERSIST THRU
EARLY NEXT WEEK AND TEMPS WILL WARM SLIGHTLY. COULD SEE SEVERAL
100 DEGREE READINGS ACROSS THE CWA DURING THE PERIOD.

FOR WED THRU FRI...MODELS ARE STILL HINTING AT A RATHER WET
PATTERN FOR CENTRAL ALABAMA AS AN UPPER LEVEL TROUGH AND
ASSOCIATED SFC FRONT PUSH EASTWARD TOWARD THE AREA PULLING AMPLE GULF
MOISTURE INTO THE REGION. LET'S KEEP OUR FINGERS CROSSED THAT THE
MODELS ARE ON TO SOMETHING BECAUSE WE DESPERATELY NEED THE RAIN.
THE CLOUDINESS AND RAINFALL WOULD ALSO OFFER A BRIEF REPRIEVE FROM
THE HEAT AS THEY SHOULD KEEP HIGHS IN THE UPPER 80S TO LOW 90S.

19

&&

.AVIATION...12Z TAF DISCUSSION.

LINGERING BOUNDARIES AND SHORTWAVE MOVING ACROSS AREA TODAY WILL
BRING A CHANCE FOR THUNDERSTORMS ONCE AGAIN. CONVECTIVE COMPLEX IN
WRN TN MAY ALSO HELP TO TRIGGER CONVECTION LATER TODAY...WITH SOME
SHOWERS ALREADY SPREADING SOUTHEAST INTO EXTREME NW AL IN ADVANCE OF
IT.  WILL INCLUDE VCSH AT FOUR NORTHERN TAF SITES EARLY THIS MORNING
BUT BELIEVE MAIN TSRA TIME FRAME WILL BE FROM LATE MORNING THROUGH
THE AFTERNOON DURING PEAK HEATING.  WILL CARRY VCTS AT ALL TAF SITES
AFTER 16Z...BUT WILL NOT INCLUDE TEMPO GROUPS SINCE CONFIDENCE IN
TIMING/PLACEMENT IS LOW.  AFTER 00Z CONVECTION SHOULD QUICKLY
DIMINISH AS SHORTWAVE TROUGH DEPARTS AND WE LOSE DAYTIME
HEATING...WITH MOSTLY VFR CONDITIONS PREVAILING THROUGH THE
OVERNIGHT HOURS.  COULD BE SOME PATCHY BR AFTER 09Z ESPECIALLY IN
AREAS THAT RECEIVE RAINFALL LATER TODAY.  WINDS GENERALLY FROM THE
SOUTH TO SOUTHWEST TODAY AVERAGING LESS THAN 10 KNOTS.

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.

41

&&

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

&&

Hazardous weather outlook, Jun 17, 10:40 AM CDT, 9 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BIRMINGHAM AL
1040 AM CDT FRI JUN 17 2011

ALZ011>015-017>050-181130-
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-
1040 AM CDT FRI JUN 17 2011

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

.DAY ONE...TODAY AND TONIGHT.

STRONG TO SEVERE THUNDERSTORMS ARE POSSIBLE THROUGH 10 PM THIS
EVENING. THE STORMS WILL BE CAPABLE OF PRODUCING WIND GUSTS 50 TO
70 MPH...LARGE HAIL UP TO PING PONG BALL SIZE...DEADLY CLOUD TO
GROUND LIGHTNING...AND BRIEF HEAVY RAINFALL.

A LARGE OUTFLOW FROM EARLY MORNING THUNDERSTORMS NORTH IS INCHING
TOWARD CENTRAL ALABAMA. AS THE SUN PEAKS THROUGH THE CLOUDS...
INSTABILITY WILL INCREASE SOUTH OF THIS BOUNDARY. ADDITIONAL
THUNDERSTORMS ARE EXPECTED TO DEVELOP ALONG THIS OUTFLOW AND AHEAD
OF IT THROUGH THIS EVENING.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

ACTIVATION OF STORM SPOTTERS AND EMERGENCY MANAGEMENT IS NOT
EXPECTED AT THIS TIME.

In the hours before

Special weather statement, Jun 17, 8:48 AM CDT, 2 hours 1 minute before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
848 AM CDT FRI JUN 17 2011

ALZ011-012-171445-
LAMAR AL-MARION AL-
848 AM CDT FRI JUN 17 2011

...SIGNIFICANT WEATHER ADVISORY FOR MARION AND NORTHERN LAMAR
COUNTIES UNTIL 945 AM CDT...

AT 847 AM CDT...THE NATIONAL WEATHER SERVICE WAS TRACKING STRONG
THUNDERSTORMS ALONG A LINE EXTENDING FROM TREMONT TO AMORY...AND
MOVING SOUTHEAST AT 25 MPH.

PEA SIZE HAIL AND WIND GUSTS UP TO 40 MPH ARE EXPECTED WITH THESE
STORMS...ALONG WITH FREQUENT DANGEROUS LIGHTNING.

LOCATIONS IN OR NEAR THE PATH OF THESE STORMS INCLUDE...
  HAMILTON...
  SULLIGENT...
  VERNON...
  DETROIT...
  WESTON...

&&

LAT...LON 3432 8818 3431 8764 3370 8812 3379 8826
TIME...MOT...LOC 1348Z 306DEG 22KT 3426 8828 3403 8851

14

Special weather statement, Jun 17, 9:40 AM CDT, 1 hour 9 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
940 AM CDT FRI JUN 17 2011

ALZ011>015-171545-
FAYETTE AL-LAMAR AL-MARION AL-WALKER AL-WINSTON AL-
940 AM CDT FRI JUN 17 2011

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN WINSTON...
NORTHWESTERN WALKER...SOUTHERN MARION...LAMAR AND NORTHERN FAYETTE
COUNTIES UNTIL 1045 AM CDT...

AT 938 AM CDT...THE NATIONAL WEATHER SERVICE WAS TRACKING STRONG
THUNDERSTORMS ALONG A LINE EXTENDING FROM BRILLIANT TO ABERDEEN...AND
MOVING EAST AT 25 MPH.

HAIL UP TO ONE-HALF INCH IN DIAMETER AND WIND GUSTS UP TO 40 MPH ARE
EXPECTED WITH THESE STORMS...ALONG WITH HEAVY RAIN AND FREQUENT
DANGEROUS LIGHTNING.

LOCATIONS IN OR NEAR THE PATH OF THESE STORMS INCLUDE...
  SULLIGENT...
  LYNN...
  WINFIELD...
  VERNON...
  CARBON HILL...

TORRENTIAL RAIN...WHICH MAY FLOOD LOW LYING AREAS SUCH AS DITCHES AND
UNDERPASSES...IS ALSO LIKELY. DO NOT DRIVE YOUR VEHICLE ON A FLOODED
ROADWAY.

&&

LAT...LON 3415 8820 3421 8779 3421 8731 3385 8732
      3361 8827
TIME...MOT...LOC 1440Z 282DEG 21KT 3407 8781 3383 8856

14

Special weather statement, Jun 17, 10:49 AM CDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
1049 AM CDT FRI JUN 17 2011

ALZ015-024-171615-
JEFFERSON AL-WALKER AL-
1049 AM CDT FRI JUN 17 2011

...SIGNIFICANT WEATHER ADVISORY FOR WALKER AND NORTHWESTERN JEFFERSON
COUNTIES UNTIL 1115 AM CDT...

AT 1046 AM CDT...THE NATIONAL WEATHER SERVICE WAS TRACKING A STRONG
THUNDERSTORM NEAR OAKMAN...OR 10 MILES SOUTHWEST OF JASPER...MOVING
SOUTHEAST AT 30 MPH.

HAIL UP TO THE SIZE OF NICKELS AND WIND GUSTS UP TO 50 MPH ARE
EXPECTED WITH THIS STORM.

LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...
  CORDOVA...
  DORA...
  SUMITON...
  PARRISH...
  LYNNS PARK...

&&

LAT...LON 3373 8684 3341 8715 3350 8726 3351 8727
      3351 8729 3354 8732 3359 8732 3359 8737
      3360 8738 3363 8743 3369 8743 3369 8751
      3371 8753 3397 8726
TIME...MOT...LOC 1549Z 312DEG 27KT 3372 8736

17/KLAWS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 16, 7:00 PM CDT	Special Weather Statement	BMX	Bullock, Pike	45 min
Jun 16, 7:31 PM CDT	Special Weather Statement	BMX	Shelby	44 min
Jun 16, 8:14 PM CDT	Special Weather Statement	BMX	Shelby	46 min
Jun 16, 8:59 PM CDT	Special Weather Statement	BMX	Coosa	46 min
Jun 17, 12:47 AM CDT	Special Weather Statement	BMX	Winston	43 min
Jun 17, 1:13 AM CDT	Special Weather Statement	BMX	Jefferson	47 min
Jun 17, 8:48 AM CDT	Special Weather Statement	BMX	Lamar, Marion	57 min
Jun 17, 9:40 AM CDT	Special Weather Statement	BMX	Lamar, Marion, Winston	65 min
Jun 17, 11:29 AM CDT	Special Weather Statement	BMX	Blount, Jefferson, Tuscaloosa	31 min
Jun 17, 11:44 AM CDT	Severe Thunderstorm Warning	BMX	Jefferson, Shelby	46 min
Jun 17, 12:08 PM CDT	Special Weather Statement	BMX	Bibb, Etowah, St. Clair, Shelby, Talladega	52 min
Jun 17, 12:10 PM CDT	Severe Thunderstorm Warning	BMX	St. Clair	50 min
Jun 17, 12:18 PM CDT	Special Weather Statement	BMX	Marion	57 min
Jun 17, 12:22 PM CDT	Severe Thunderstorm Warning	BMX	Bibb, Chilton, Shelby, Talladega	38 min
Jun 17, 12:23 PM CDT	Special Weather Statement	BMX	Dallas	67 min
Jun 17, 12:28 PM CDT	Areal Flood Advisory	BMX	Jefferson, Shelby	2 hr
Jun 17, 12:32 PM CDT	Special Weather Statement	BMX	Montgomery	43 min
Jun 17, 12:49 PM CDT	Special Weather Statement	BMX	Calhoun	41 min
Jun 17, 12:53 PM CDT	Severe Thunderstorm Warning	BMX	Montgomery	52 min
Jun 17, 12:54 PM CDT	Special Weather Statement	BMX	Autauga, Chilton, Clay, Coosa, Perry, Talladega	51 min
Jun 17, 1:00 PM CDT	Severe Thunderstorm Warning	BMX	Coosa	45 min
Jun 17, 1:22 PM CDT	Severe Thunderstorm Warning	BMX	Autauga, Dallas, Lowndes	38 min
Jun 17, 1:32 PM CDT	Special Weather Statement	BMX	Bullock	43 min
Jun 17, 1:35 PM CDT	Special Weather Statement	BMX	Clay, Cleburne, Randolph	40 min
Jun 17, 1:41 PM CDT	Special Weather Statement	BMX	Bullock, Lowndes, Macon, Montgomery	49 min
Jun 17, 1:47 PM CDT	Severe Thunderstorm Warning	BMX	Lowndes, Montgomery	28 min
Jun 17, 1:50 PM CDT	Special Weather Statement	BMX	Chambers, Elmore, Lee, Tallapoosa	55 min
Jun 17, 2:02 PM CDT	Special Weather Statement	BMX	Autauga	28 min
Jun 17, 2:06 PM CDT	Severe Thunderstorm Warning	BMX	Elmore, Macon, Montgomery	39 min
Jun 17, 2:37 PM CDT	Special Weather Statement	BMX	Barbour, Bullock, Macon, Montgomery, Pike, Russell	53 min
Jun 17, 2:53 PM CDT	Special Weather Statement	BMX	Lee	52 min
Jun 17, 3:14 PM CDT	Severe Thunderstorm Warning	BMX	Lee, Russell	21 min

Nearby

Special Weather Statements in Alabama, 2011 Every special weather statement 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.