Alert archive / Alabama / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 43, NWS Birmingham, AL

March 18, 2013Bibb County, Chilton County, Perry County, Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at Mar 18, 2013, 4:18 PM CDT for Bibb County, Chilton County, Perry County, Alabama. It was in force for 57 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 18, 2013, 4:18 PM CDT (21:18 UTC)
Expired: Mar 18, 2013, 5:15 PM CDT
In force: 57 min
Issued by: NWS Birmingham, AL
Area: Storm-based polygon

Counties Bibb County, AL, Chilton County, AL, Perry County, AL

The radar

The Birmingham radar (KBMX), 50 km from the middle of the area, began a volume at 21:19 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 18, 4:34 PM CDT	HAIL 1	2 Wnw Maplesville, AL	ONE INCH HAIL COVERING THE GROUND AT THE REST AREA ALONG HIGHWAY 82.
Mar 18, 4:34 PM CDT	HAIL 2	2 N Sprott, AL	REPORTED NEAR SPROTT. TIME ESTIMATED FROM RADAR.

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 2 storm reports to this severe thunderstorm warning; the first came 16 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
Mar 18, 1:31 PM CDT	Severe Thunderstorm Watch	SPC	8 hr
Mar 18, 3:16 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 9.3 hours before the alert went out and 51 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: 196 J/kg
Mixed-layer CIN: -139 J/kg
Mixed-layer LCL: 520 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 298 m²/s²
0-3 km storm-relative helicity: 281 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.8

Open this sounding in Storm Lab

The text

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

893 
WUUS54 KBMX 182118
SVRBMX
ALC007-021-105-182215-
/O.NEW.KBMX.SV.W.0043.130318T2118Z-130318T2215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BIRMINGHAM AL
418 PM CDT MON MAR 18 2013

THE NATIONAL WEATHER SERVICE IN BIRMINGHAM HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN BIBB COUNTY IN ALABAMA...
  SOUTHERN CHILTON COUNTY IN ALABAMA...
  NORTHEASTERN PERRY COUNTY IN ALABAMA...

* UNTIL 515 PM CDT

* AT 418 PM CDT...THE NATIONAL WEATHER SERVICE INDICATED A LINE OF
  SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED
  ALONG A LINE EXTENDING FROM TALLADEGA NATIONAL FOREST TO MARION...
  AND MOVING EAST AT 40 MPH.

* LOCATIONS IMPACTED INCLUDE...
  CLANTON...LAWLEY...MAPLESVILLE...PARNELL...POOLES CROSSROADS...
  PLECHER...VERBENA AND OAKMULGEE.

THIS INCLUDES...
INTERSTATE 65 EXIT NUMBERS 200 THROUGH 205...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

A TORNADO WATCH REMAINS IN EFFECT UNTIL 900 PM CDT MONDAY EVENING FOR
SOUTHEASTERN ALABAMA.

TO REPORT SEVERE WEATHER...
CALL 1-800-856-0758 OR TWEET YOUR REPORT USING HASHTAG ALWX

LAT...LON 3293 8715 3281 8644 3275 8637 3275 8641
      3270 8642 3271 8671 3266 8672 3267 8701
      3272 8702 3264 8705 3260 8704 3258 8706
      3268 8740
TIME...MOT...LOC 2118Z 280DEG 33KT 3286 8698 3265 8733

$$

GRANTHAM

1 follow-up statement

830 
WWUS54 KBMX 182139
SVSBMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
439 PM CDT MON MAR 18 2013

ALC007-182149-
/O.CAN.KBMX.SV.W.0043.000000T0000Z-130318T2215Z/
BIBB AL-
439 PM CDT MON MAR 18 2013

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN BIBB COUNTY IS
CANCELLED...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAVE MOVED OUT OF THE 
WARNED AREA.

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

LAT...LON 3283 8725 3283 8688 3288 8687 3281 8644
      3275 8637 3275 8641 3271 8642 3271 8671
      3266 8672 3267 8701 3271 8702 3264 8705
      3260 8704 3258 8706 3268 8740
TIME...MOT...LOC 2139Z 280DEG 33KT 3283 8675 3266 8733

$$

ALC021-105-182215-
/O.CON.KBMX.SV.W.0043.000000T0000Z-130318T2215Z/
CHILTON AL-PERRY AL-
439 PM CDT MON MAR 18 2013

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHEASTERN
PERRY AND SOUTHERN CHILTON COUNTIES UNTIL 515 PM CDT...

AT 439 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE
LOCATED ALONG A LINE EXTENDING FROM CHILTON COUNTY MOTOR SPORTS PARK
TO MARION...MOVING EAST AT 40 MPH.

LOCATIONS IMPACTED INCLUDE...
  CLANTON...MAPLESVILLE...PARNELL...POOLES CROSSROADS...PLECHER...
  VERBENA...SPROTT...STANTON...COOPER AND MITCHELL DAM.

THIS INCLUDES...
INTERSTATE 65 EXIT NUMBERS 200 THROUGH 205...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. TORNADOES CAN
DEVELOP QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH NOT IMMEDIATELY
LIKELY...IF A TORNADO IS SPOTTED ACT QUICKLY AND MOVE TO A PLACE OF
SAFETY INSIDE A STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL
INTERIOR ROOM.

&&

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

LAT...LON 3283 8725 3283 8688 3288 8687 3281 8644
      3275 8637 3275 8641 3271 8642 3271 8671
      3266 8672 3267 8701 3271 8702 3264 8705
      3260 8704 3258 8706 3268 8740
TIME...MOT...LOC 2139Z 280DEG 33KT 3283 8675 3266 8733

$$

GRANTHAM

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 Mar 18, 3:29 PM CDT, 49 minutes earlier.

Area forecast discussion, Mar 18, 3:29 PM CDT, 49 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BIRMINGHAM AL
329 PM CDT MON MAR 18 2013

.DISCUSSION...

ONGOING STORMS WILL GRADUALLY PUSH EASTWARD OUT OF AREA THROUGH
THE EVENING.

THE REST OF THE 7 DAY FORECAST PERIOD WILL BE LARGELY DOMINATED BY
EASTERN STATES TROUGHINESS...KEEPING OUR AREA NEAR OR BELOW
SEASONAL TEMPERATURE AVERAGES. THERE IS A POTENTIAL FOR FREEZING
TEMPERATURES WEDNESDAY NIGHT INTO EARLY THURSDAY MORNING. NEXT
GOOD CHANCES OF RAIN WILL COME LATE IN THE WEEK INTO NEXT WEEKEND.

/61/

&&

.AVIATION...
18Z TAF DISCUSSION.

THIS IS GOING TO BE A VERY IDEALIZED TAF FORECAST...ESPECIALLY FOR
THE FIRST 6 TO 8 HOURS.  WITH MVFR CIGS BECOMING THINNER AND
THINNER...SUNSHINE IS STARTING TO SQUEEZE THROUGH THE CLOUD DECK.
THIS WILL LIKELY HELP TO DESTABILIZE THINGS...ALLOWING FOR SCATTERED
TS DEVELOPMENT ACROSS MOST OF THE AREA THIS AFTERNOON.  PREVAILING
TAF LINES REALLY REVOLVE AROUND THE LINE OF TS OVER NORTHERN
MISSISSIPPI AND ALABAMA...WHICH WILL CONTINUE PUSHING TO THE SOUTH
AND EAST THROUGH 00Z.  MAY HAVE TO ADJUST A BIT IF THESE SCATTERED
STORMS BEGIN POPPING UP AHEAD OF THE LINE.

WINDS WILL GRADUALLY VEER THROUGH THE AFTERNOON AS WELL...GIVING US
SOUTHWESTERLY SURFACE FLOW AHEAD OF FROPA...WHICH WILL TRANSLATE
THROUGH CENTRAL ALABAMA DURING THE OVERNIGHT HOURS.  CLEARING IS
LIKELY A FEW HOURS AFTER DAYBREAK ON TUESDAY.

&&

.PRELIMINARY POINT TEMPS/POPS...
GADSDEN     42  63  40  60  30 / 100   0  10  10   0
ANNISTON    44  63  41  59  32 / 100   0  10  10   0
BIRMINGHAM  44  64  43  61  32 / 100   0  10   0   0
TUSCALOOSA  45  66  44  63  36 /  70   0  10   0   0
CALERA      46  65  43  62  34 / 100   0  10  10   0
AUBURN      51  67  44  61  35 /  90   0  10  10   0
MONTGOMERY  52  69  46  62  37 /  70   0  10  10   0
TROY        55  70  46  62  37 /  60   0  10  10   0

&&

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

&&

Hazardous weather outlook, Mar 18, 1:08 PM CDT, 3 hours 10 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BIRMINGHAM AL
108 PM CDT MON MAR 18 2013

ALZ011>015-017>050-191815-
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-
108 PM CDT MON MAR 18 2013

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

.DAY ONE...THIS AFTERNOON AND TONIGHT.

THERE WILL BE A CHANCE FOR SEVERE THUNDERSTORMS THROUGH 10 PM...
FOR ALL OF CENTRAL ALABAMA. THE PRIMARY THREATS WILL BE DAMAGING
STRAIGHT LINE WINDS AND LARGE HAIL...POSSIBLY UP TO TWO INCHES IN
DIAMETER.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.

A DRY AIRMASS WILL WORK INTO THE AREA ON TUESDAY. THERE IS A LOW
CONFIDENCE THAT RELATIVE HUMIDITIES MAY DROP BELOW 25 PERCENT
ACROSS THE EAST FOR SEVERAL HOURS DURING THE AFTERNOON. THIS WOULD
HELP CREATE A POTENTIAL HIGH FIRE DANGER. OUTDOOR BURNING IS
DISCOURAGED WITH THIS TYPE OF AIRMASS.

THERE IS A CHANCE FOR TEMPERATURES TO FALL BELOW THE FREEZING MARK
WEDNESDAY NIGHT INTO THURSDAY MORNING. SENSITIVE VEGETATION WILL
NEED TO BE PROTECTED DUE TO THE FREEZING TEMPERATURES.

.SPOTTER INFORMATION STATEMENT...

ACTIVATION OF STORM SPOTTERS AND EMERGENCY MANAGEMENT WILL BE
NEEDED THIS AFTERNOON AND TONIGHT.

27

In the hours before

Local storm report, Mar 18, 4:08 PM CDT, 10 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
408 PM CDT MON MAR 18 2013

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

0407 PM     HAIL             LINEVILLE               33.31N 85.75W
03/18/2013  M0.75 INCH       CLAY               AL   EMERGENCY MNGR

&&

SUNGER

Local storm report, Mar 18, 4:09 PM CDT, 9 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
409 PM CDT MON MAR 18 2013

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

0350 PM     TSTM WND DMG     RAINBOW CITY            33.95N 86.04W
03/18/2013                   ETOWAH             AL   EMERGENCY MNGR

            TREE ON HOUSE ON RAINBOW DRIVE WITH ENTRAPMENT

&&

SUNGER

Local storm report, Mar 18, 4:12 PM CDT, 6 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
412 PM CDT MON MAR 18 2013

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

0356 PM     TSTM WND DMG     TALLADEGA               33.43N 86.10W
03/18/2013                   TALLADEGA          AL   EMERGENCY MNGR

            TREE ON HOUSE ON SILVERWOOD DRIVE WITH ENTRAPMENT

&&

SUNGER

Local storm report, Mar 18, 4:13 PM CDT, 5 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
413 PM CDT MON MAR 18 2013

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

0355 PM     HAIL             LINCOLN                 33.60N 86.14W
03/18/2013  M2.00 INCH       TALLADEGA          AL   PUBLIC

&&

SUNGER

Local storm report, Mar 18, 4:14 PM CDT, 4 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
414 PM CDT MON MAR 18 2013

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

0352 PM     TSTM WND DMG     RAINBOW CITY            33.95N 86.04W
03/18/2013                   ETOWAH             AL   EMERGENCY MNGR

            APPROXIMATELY 20 TREES DOWN ON AL HWY 77

&&

SUNGER

Local storm report, Mar 18, 4:15 PM CDT, 3 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
415 PM CDT MON MAR 18 2013

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

0413 PM     HAIL             CAMP HILL               32.80N 85.65W
03/18/2013  E1.25 INCH       TALLAPOOSA         AL   EMERGENCY MNGR

&&

SUNGER

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 18, 4:58 AM CDT	Special Weather Statement	BMX	Marion	32 min
Mar 18, 1:06 PM CDT	Special Weather Statement	BMX	Marion	39 min
Mar 18, 1:19 PM CDT	Severe Thunderstorm Warning	BMX	Marion	41 min
Mar 18, 1:31 PM CDT	Severe Thunderstorm Warning	BMX	Marion	44 min
Mar 18, 1:51 PM CDT	Severe Thunderstorm Warning	BMX	Lamar, Marion	54 min
Mar 18, 2:06 PM CDT	Severe Thunderstorm Warning	BMX	Winston	39 min
Mar 18, 2:18 PM CDT	Severe Thunderstorm Warning	BMX	Fayette, Lamar, Marion, Pickens, Winston	57 min
Mar 18, 2:28 PM CDT	Severe Thunderstorm Warning	BMX	Tuscaloosa, Walker	62 min
Mar 18, 3:03 PM CDT	Severe Thunderstorm Warning	BMX	St. Clair	27 min
Mar 18, 3:06 PM CDT	Severe Thunderstorm Warning	BMX	Blount, Jefferson	39 min
Mar 18, 3:20 PM CDT	Special Weather Statement	BMX	Greene, Sumter	55 min
Mar 18, 3:28 PM CDT	Severe Thunderstorm Warning	BMX	Tuscaloosa	47 min
Mar 18, 3:34 PM CDT	Severe Thunderstorm Warning	BMX	Etowah, St. Clair, Shelby	56 min
Mar 18, 3:38 PM CDT	Severe Thunderstorm Warning	BMX	Chilton, Coosa	52 min
Mar 18, 3:46 PM CDT	Severe Thunderstorm Warning	BMX	Calhoun, Talladega	44 min
Mar 18, 3:54 PM CDT	Severe Thunderstorm Warning	BMX	Bibb, Chilton	66 min
Mar 18, 4:01 PM CDT	Severe Thunderstorm Warning	BMX	Calhoun, Cherokee, Talladega	59 min
Mar 18, 4:09 PM CDT	Severe Thunderstorm Warning	BMX	Chambers, Tallapoosa	66 min
Mar 18, 4:12 PM CDT	Severe Thunderstorm Warning	BMX	Clay, Cleburne, Randolph	63 min
Mar 18, 4:14 PM CDT	Severe Thunderstorm Warning	BMX	Coosa	31 min
Mar 18, 4:24 PM CDT	Special Weather Statement	BMX	Russell	36 min
Mar 18, 4:35 PM CDT	Severe Thunderstorm Warning	BMX	Tallapoosa	55 min
Mar 18, 4:43 PM CDT	Special Weather Statement	BMX	Dallas, Marengo, Perry	62 min
Mar 18, 4:49 PM CDT	Severe Thunderstorm Warning	BMX	Dallas, Marengo, Perry, Sumter	56 min
Mar 18, 4:58 PM CDT	Severe Thunderstorm Warning	BMX	Autauga, Elmore	62 min
Mar 18, 5:05 PM CDT	Severe Thunderstorm Warning	BMX	Tallapoosa	40 min
Mar 18, 5:18 PM CDT	Severe Thunderstorm Warning	BMX	Chambers, Lee	57 min
Mar 18, 5:30 PM CDT	Special Weather Statement	BMX	Lowndes, Montgomery	60 min
Mar 18, 5:32 PM CDT	Severe Thunderstorm Warning	BMX	Macon	58 min
Mar 18, 5:38 PM CDT	Severe Thunderstorm Warning	BMX	Russell	52 min
Mar 18, 6:11 PM CDT	Special Weather Statement	BMX	Lowndes, Montgomery	49 min
Mar 18, 6:15 PM CDT	Severe Thunderstorm Warning	BMX	Lee	15 min
Mar 18, 6:21 PM CDT	Special Weather Statement	BMX	Barbour, Bullock, Pike, Russell	54 min
Mar 18, 6:52 PM CDT	Severe Thunderstorm Warning	BMX	Barbour, Bullock, Pike	53 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.