Alert archive / Alabama / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 81, NWS Birmingham, AL

May 17, 2013Pickens County, Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at May 17, 2013, 5:31 PM CDT for Pickens County, Alabama. It was in force for 44 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: May 17, 2013, 5:31 PM CDT (22:31 UTC)
Expired: May 17, 2013, 6:15 PM CDT
In force: 44 min
Issued by: NWS Birmingham, AL
Area: Storm-based polygon

County Pickens County, AL

The radar

The Columbus AFB radar (KGWX), 72 km from the middle of the area, began a volume at 22:31 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, 10.5 hours before the alert went out and 122 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: 218 J/kg
Mixed-layer CIN: -104 J/kg
Mixed-layer LCL: 645 m above ground
0-6 km bulk shear: 11 kt
0-1 km storm-relative helicity: 34 m²/s²
0-3 km storm-relative helicity: 44 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

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 May 17, 3:07 PM CDT, 2 hours 24 minutes earlier.

Area forecast discussion, May 17, 3:07 PM CDT, 2 hours 24 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BIRMINGHAM AL
307 PM CDT FRI MAY 17 2013

.DISCUSSION...

UPPER LEVEL TROUGH WILL CONTINUE ITS SLOW EASTWARD PROGRESSION
THROUGH THE NIGHT. FOR THE REMAINDER OF THE AFTERNOON AND EARLY
EVENING...THE AREA OF SHOWERS AND ISOLATED EMBEDDED THUNDERSTORMS
OVER NORTHERN ALABAMA WILL PRODUCE STEADY RAINFALL WITH MORE
ISOLATED TO SCATTERED CONVECTION BEGINNING TO FILL IN AROUND
SOUTHWEST ALABAMA. SUFFICIENT INSTABILITY AND SHEAR REMAIN
SUPPORTIVE OF AN ISOLATED STRONG TO SEVERE THREAT THROUGH THE
EARLY EVENING...OR THE REMAINDER OF THE PEAK HEATING PERIOD.

TONIGHT...WEAKENING INTENSITY BUT SOME DECENT COVERAGE STILL
EXPECTED ACROSS THE NORTHERN HALF OF THE CWA. A SIMILAR SET UP FOR
SATURDAY AND SATURDAY NIGHT...ALTHOUGH THE BETTER COVERAGE WILL
SLIDE INTO EASTERN ALABAMA AS THE UPPER TROUGH SHIFTS FARTHER
EASTWARD.

A FEW SHOWERS POSSIBLE IN EAST ALABAMA ON SUNDAY WITH DRY WEATHER
AREA WIDE SUNDAY THROUGH TUESDAY AS AN UPPER RIDGE BUILDS IN.
ANOTHER SYNOPTIC SYSTEM MOVES INTO THE AREA MID TO LATE WEEK WITH
INCREASING DIURNAL SHOWERS AND THUNDERSTORMS.

TEMPERATURES WILL REMAIN COOL IN THE RAIN SHIELD AREA TOMORROW AND
SUNDAY WITH WARMER HIGHS NEXT WEEK.

88

&&

.AVIATION...
18Z TAF DISCUSSION.

WITH AN UPPER LEVEL DISTURBANCE CURRENTLY MOVING OVER THE MID
SOUTH... SHOWERS AND THUNDERSTORMS WILL BE POSSIBLE OVER MOST OF
CENTRAL ALABAMA THIS AFTERNOON AND FOR MUCH OF TONIGHT. MADE SOME
ADJUSTMENTS IN THE STARTING AND ENDING TIMES FOR VCTS... NAMELY
PUSHING THE START TIME BACK A FEW HOURS FOR ANB... BHM... AND
EET. THIS ALSO REQUIRED A LATER ENDING TIME FOR VCTS AT SITES
WHERE IT IS INCLUDED. BOTH OF THESE DECISIONS WERE BASED ON
CURRENT RADAR TRENDS AND SHORT TERM MODEL GUIDANCE. KEPT MGM AND
TOI FREE FROM ANY MENTION OF PRECIP AS BEST CHANCES SHOULD REMAIN
NORTH OF BOTH SITES.

DID NOT INCLUDE A PREVAILING TSRA LINE FOR ANY TAF SITE YET DUE TO
UNCERTAINTY IN THE TIMING AND COVERAGE OF THUNDERSTORMS ACROSS THE
AREA. EXPECT AMENDMENTS THIS AFTERNOON TO INCLUDE TSRA AS PRECIP
SHOULD DEVELOP OVER MISSISSIPPI AND THEN TRACK EASTWARD OVER
CENTRAL ALABAMA. FOR LOW CIGS OVERNIGHT AND INTO SATURDAY MORNING...
WENT AHEAD AND ADDED IN A FUEL ALT PREVAILING LINE AT ALL SITES
GIVEN THE CONSISTENCY AMONGST THE GUIDANCE IN SHOWING THIS AND THE
FACT THAT THERE ARE FAIRLY WIDESPREAD MVFR CLOUDS TO THE SOUTH AND
WEST OF THE AREA THAT WILL MOST LIKELY MOVE IN OVERNIGHT.
CONFIDENCE WAS TOO LOW TO INCLUDE ANY IFR YET.

77/GLEASON

&&

.PRELIMINARY POINT TEMPS/POPS...
GADSDEN     64  79  63  83  63 /  90  60  60  60  10
ANNISTON    65  79  65  82  65 /  80  60  60  60  10
BIRMINGHAM  68  80  67  85  67 /  80  60  50  40  10
TUSCALOOSA  68  82  68  86  66 /  60  40  20  10  10
CALERA      66  80  66  84  66 /  60  50  40  30  10
AUBURN      66  80  66  84  67 /  40  50  50  40  20
MONTGOMERY  65  83  67  87  66 /  30  40  30  20  10
TROY        64  82  65  87  66 /  20  30  20  20  10

&&

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

&&

Hazardous weather outlook, May 17, 12:00 PM CDT, 5 hours 31 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BIRMINGHAM AL
1200 PM CDT FRI MAY 17 2013

ALZ011>015-017>050-181700-
MARION-LAMAR-FAYETTE-WINSTON-WALKER-BLOUNT-ETOWAH-CALHOUN-CHEROKEE-
CLEBURNE-PICKENS-TUSCALOOSA-JEFFERSON-SHELBY-ST. CLAIR-TALLADEGA-
CLAY-RANDOLPH-SUMTER-GREENE-HALE-PERRY-BIBB-CHILTON-COOSA-TALLAPOOSA-
CHAMBERS-MARENGO-DALLAS-AUTAUGA-LOWNDES-ELMORE-MONTGOMERY-MACON-
BULLOCK-LEE-RUSSELL-PIKE-BARBOUR-
1200 PM CDT FRI MAY 17 2013

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

.DAY ONE...THIS AFTERNOON AND TONIGHT.

NUMEROUS SHOWERS AND ISOLATED SEVERE THUNDERSTORMS WILL BE
POSSIBLE NORTHWEST OF A LINE FROM DIXONS MILL...TO CALERA...TO
GADSDEN THROUGH 9 PM. STRONGER STORMS COULD PRODUCE DAMAGING WINDS
AND LARGE HAIL. HEAVY RAINFALL WITH ANY SLOW MOVING STORM COULD
ALSO RESULT IN LOCALIZED FLOODING.

.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 MIGHT BE
NEEDED ACROSS NORTHWEST CENTRAL ALABAMA THROUGH EARLY EVENING.

In the hours before

Special weather statement, May 17, 3:27 PM CDT, 2 hours 4 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
327 PM CDT FRI MAY 17 2013

ALZ032-172100-
HALE AL-
327 PM CDT FRI MAY 17 2013

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN HALE COUNTY UNTIL
400 PM CDT...

AT 327 PM CDT...THE NATIONAL WEATHER SERVICE WAS TRACKING A STRONG
THUNDERSTORM 8 MILES NORTHEAST OF SAWYERVILLE...OR 8 MILES NORTH OF
GREENSBORO...MOVING NORTHEAST AT 25 MPH.

WIND GUSTS UP TO 40 MPH ARE EXPECTED WITH THIS STORM.

LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...
  HARPER HILL...
  HAVANA...
  PHIPPS...
  WATEROAK...

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

&&

LAT...LON 3301 8743 3300 8742 3283 8742 3283 8747
      3277 8747 3272 8762 3288 8770
TIME...MOT...LOC 2027Z 245DEG 21KT 3282 8761

77/GLEASON

Special weather statement, May 17, 3:51 PM CDT, 1 hour 40 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
351 PM CDT FRI MAY 17 2013

ALZ011>015-172130-
FAYETTE AL-LAMAR AL-MARION AL-WALKER AL-WINSTON AL-
351 PM CDT FRI MAY 17 2013

...SIGNIFICANT WEATHER ADVISORY FOR WESTERN WINSTON...EXTREME
NORTHWESTERN WALKER...EASTERN MARION...SOUTHEASTERN LAMAR AND WESTERN
FAYETTE COUNTIES UNTIL 430 PM CDT...

AT 351 PM CDT...THE NATIONAL WEATHER SERVICE WAS TRACKING STRONG
THUNDERSTORMS ALONG A LINE EXTENDING FROM HACKLEBURG TO MILLPORT...
AND MOVING EAST AT 25 MPH.

WIND GUSTS UP TO 40 MPH ARE EXPECTED WITH THESE STORMS.

LOCATIONS IN OR NEAR THE PATH OF THESE STORMS INCLUDE...
  MILLPORT...
  WINFIELD...
  HALEYVILLE...
  FAYETTE...
  GUIN...

THESE STORMS MAY INTENSIFY...SO BE CERTAIN TO MONITOR LOCAL RADIO AND
TV STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS... FOR ADDITIONAL
INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE.

&&

LAT...LON 3432 8785 3430 8746 3353 8777 3354 8827
TIME...MOT...LOC 2051Z 262DEG 21KT 3428 8776 3358 8812

Special weather statement, May 17, 3:58 PM CDT, 1 hour 33 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
358 PM CDT FRI MAY 17 2013

ALZ030-172130-
SUMTER AL-
358 PM CDT FRI MAY 17 2013

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN SUMTER COUNTY UNTIL
430 PM CDT...

AT 358 PM CDT...THE NATIONAL WEATHER SERVICE WAS TRACKING A STRONG
THUNDERSTORM NEAR KINTERBISH...OR 12 MILES SOUTHEAST OF CUBA...MOVING
NORTHEAST AT 20 MPH.

HAIL UP TO ONE-HALF INCH IN DIAMETER AND WIND GUSTS UP TO 40 MPH ARE
POSSIBLE WITH THIS STORM.

LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...
  WHITFIELD...
  BELLAMY...

THIS STORM MAY INTENSIFY...SO BE CERTAIN TO MONITOR LOCAL RADIO AND
TV STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS... FOR ADDITIONAL
INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE.

&&

LAT...LON 3249 8809 3244 8803 3238 8805 3237 8802
      3234 8799 3234 8797 3231 8793 3230 8794
      3230 8834 3233 8835 3234 8835
TIME...MOT...LOC 2057Z 243DEG 17KT 3231 8825

77/GLEASON

Special weather statement, May 17, 4:17 PM CDT, 1 hour 14 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
417 PM CDT FRI MAY 17 2013

ALZ034-172215-
BIBB AL-
417 PM CDT FRI MAY 17 2013

...SIGNIFICANT WEATHER ADVISORY FOR BIBB COUNTY UNTIL 515 PM CDT...

AT 416 PM CDT...THE NATIONAL WEATHER SERVICE WAS TRACKING A STRONG
THUNDERSTORM NEAR MERTZ...OR 10 MILES SOUTHWEST OF BRENT...MOVING
EAST AT 25 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...
  BRENT...
  CENTREVILLE...
  HARRISBURG...
  EOLINE...
  WEST CENTREVILLE...

&&

LAT...LON 3312 8697 3310 8697 3310 8695 3308 8695
      3305 8688 3289 8688 3283 8712 3283 8731
      3287 8732 3288 8742 3295 8742
TIME...MOT...LOC 2117Z 250DEG 24KT 3288 8732

GRANTHAM

Special weather statement, May 17, 4:35 PM CDT, 56 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
435 PM CDT FRI MAY 17 2013

ALZ039-172230-
MARENGO AL-
435 PM CDT FRI MAY 17 2013

...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL MARENGO COUNTY UNTIL 530
PM CDT...

AT 435 PM CDT...THE NATIONAL WEATHER SERVICE WAS TRACKING A STRONG
THUNDERSTORM 7 MILES NORTHEAST OF INDIAN SPRINGS...OR 13 MILES WEST
OF LINDEN...MOVING EAST AT 25 MPH.

HAIL UP TO THE SIZE OF PENNIES AND WIND GUSTS UP TO 40 MPH ARE
EXPECTED WITH THIS STORM.

LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...
  LINDEN...
  MYRTLEWOOD...
  JEFFERSON...
  PIN HOOK...
  CHICKASAW STATE PARK...

&&

LAT...LON 3242 8804 3246 8753 3221 8753 3223 8802
      3226 8801 3229 8803 3230 8800 3231 8794
      3235 8797 3234 8799 3237 8802 3237 8805
TIME...MOT...LOC 2136Z 269DEG 21KT 3233 8798

GRANTHAM

Special weather statement, May 17, 5:05 PM CDT, 26 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
505 PM CDT FRI MAY 17 2013

ALZ022-172245-
PICKENS AL-
505 PM CDT FRI MAY 17 2013

...SIGNIFICANT WEATHER ADVISORY FOR NORTHERN PICKENS COUNTY UNTIL 545
PM CDT...

AT 505 PM CDT...THE NATIONAL WEATHER SERVICE WAS TRACKING A STRONG
THUNDERSTORM NEAR ETHELSVILLE...OR 10 MILES NORTH OF PICKENSVILLE...
MOVING EAST AT 35 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...
  CARROLLTON...
  REFORM...
  GORDO...
  MCSHAN...
  OWENS...

&&

LAT...LON 3347 8826 3342 8784 3320 8784 3329 8830
TIME...MOT...LOC 2205Z 280DEG 28KT 3336 8818

GRANTHAM

The office that day

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

Issued	Product	Office	Counties	Lasted
May 17, 3:02 PM CDT	Special Weather Statement	BMX	Marion	43 min
May 17, 3:27 PM CDT	Special Weather Statement	BMX	Hale	33 min
May 17, 3:51 PM CDT	Special Weather Statement	BMX	Fayette, Lamar, Marion	39 min
May 17, 3:58 PM CDT	Special Weather Statement	BMX	Sumter	32 min
May 17, 4:17 PM CDT	Special Weather Statement	BMX	Bibb	58 min
May 17, 4:35 PM CDT	Special Weather Statement	BMX	Marengo	55 min
May 17, 5:05 PM CDT	Special Weather Statement	BMX	Pickens	40 min
May 17, 5:11 PM CDT	Tornado Warning	BMX	Pickens	34 min
May 17, 5:36 PM CDT	Special Weather Statement	BMX	Bibb	39 min
May 17, 5:47 PM CDT	Severe Thunderstorm Warning	BMX	Bibb, Hale, Tuscaloosa	43 min
May 17, 6:15 PM CDT	Special Weather Statement	BMX	Greene	45 min
May 17, 6:16 PM CDT	Special Weather Statement	BMX	Hale	44 min
May 17, 6:42 PM CDT	Special Weather Statement	BMX	Dallas	48 min
May 17, 6:59 PM CDT	Special Weather Statement	BMX	Hale	61 min

Nearby

Severe Thunderstorm Warnings in Alabama, 2013 Every severe thunderstorm warning in 2013

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.