Alert archive / Alabama / Special Weather Statements in 2011

Special Weather Statement, NWS Birmingham, AL

March 28, 2011Clay County, Alabama

NWS Birmingham, AL issued this special weather statement at Mar 28, 2011, 2:47 AM CDT for Clay County, Alabama. It was in force for 43 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: Mar 28, 2011, 2:47 AM CDT (07:47 UTC)
Expired: Mar 28, 2011, 3:30 AM CDT
In force: 43 min
Issued by: NWS Birmingham, AL

County Clay County, AL

The radar

The Birmingham radar (KBMX), 106 km from the middle of the area, began a volume at 07:47 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 00:00Z, 7.8 hours before the alert went out and 107 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 652 m above ground
0-6 km bulk shear: 69 kt
0-1 km storm-relative helicity: 44 m²/s²
0-3 km storm-relative helicity: 105 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.6

Open this sounding in Storm Lab

The text

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

953 
WWUS84 KBMX 280747
SPSBMX

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
247 AM CDT MON MAR 28 2011

ALZ021-027>029-280830-
CLAY AL-CLEBURNE AL-RANDOLPH AL-TALLADEGA AL-
247 AM CDT MON MAR 28 2011

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHERN CLEBURNE...EASTERN
TALLADEGA...NORTHERN RANDOLPH AND NORTHEASTERN CLAY COUNTIES UNTIL
330 AM CDT...

AT 242 AM CDT...THE NATIONAL WEATHER SERVICE WAS TRACKING A STRONG
THUNDERSTORM NEAR TALLADEGA...MOVING EAST AT 50 MPH.

PEA SIZE HAIL IS EXPECTED WITH THIS STORM...ALONG WITH FREQUENT
DANGEROUS LIGHTNING.

LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...
  WALDO...
  GRANT TOWN...
  MOUNT CHEAHA...
  FOSTERS CROSS ROADS...
  MORRISON CROSS ROADS...


&&

LAT...LON 3345 8530 3332 8615 3349 8620 3358 8579
      3355 8580 3355 8574 3360 8574 3369 8534
TIME...MOT...LOC 0747Z 257DEG 44KT 3342 8607

$$

27

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 Mar 28, 12:08 AM CDT, 2 hours 39 minutes earlier.

Area forecast discussion, Mar 28, 12:08 AM CDT, 2 hours 39 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BIRMINGHAM AL
1208 AM CDT MON MAR 28 2011

.UPDATE...AVIATION AND PUBLIC FORECAST DISCUSSIONS.

&&

.DISCUSSION...

THE STORMS JUST KEEP COMING...WITH UPDRAFTS ROOTED ABOVE THE
BOUNDARY LAYER.  STILL POTENT.  INCREASED POPS PRETTY MUCH
EVERYWHERE FOR THE REST OF THE NIGHT...AND MADE A FEW TEMPERATURE
ADJUSTMENTS AS WELL.

/61/

&&

.AVIATION...06Z TAF DISCUSSION.

THE BULK OF THE ONGOING CONVECTION...AND EXTRAPOLATED TRAJECTORIES
OF UPSTREAM STORMS...SUGGEST THAT TAF LOCATIONS MAY LARGELY DODGE
BULLETS OVERNIGHT WITH STORMS STAYING LARGELY TO THE NORTH. HAVING
SAID THAT...WILL PROBABLY NEED TO ISSUE PERIODIC UPDATES TO TAFS AS
NEW CELLS DEVELOP AND DIE.  THE STORMS ARE ALSO PLAYING HAVOC WITH
CEILINGS. CONDITIONS SEEM TO WANT TO SOCK IN WITH IFR CEILINGS...BUT
STORMS COME THROUGH AND PASS NEAR BY AND BRIEFLY IMPROVE CONDITIONS.

WILL TRY TO HANDLE THE SITUATION AS BEST I CAN...BUT CONFIDENCE
REMAINS MUCH LOWER THAN NORMAL DUE TO WIDELY VARYING CONDITIONS AND
SCATTERED NATURE OF STORMS.

/61/

NOTICE...KEET TAF WILL HAVE (AMD LTD TO VIS WIND AND WX) AMENDED
TO THE END OF THE FORECAST THROUGH THE END OF THE 2010/2011 WINTER
SEASON. THE CEILOMETER DATA WILL BE GOING THROUGH NUMEROUS TESTS
AND MONITORED FOR ACCURACY.

&&

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

&&

Hazardous weather outlook, Mar 27, 8:59 PM CDT, 5 hours 48 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BIRMINGHAM AL
859 PM CDT SUN MAR 27 2011

ALZ011>015-017>050-281130-
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-
859 PM CDT SUN MAR 27 2011

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

.DAY ONE...TONIGHT.

ISOLATED STRONG TO SEVERE STORMS ARE POSSIBLE OVERNIGHT ACROSS ALL
OF CENTRAL ALABAMA. THE THREATS WILL INCLUDE PEA TO QUARTER SIZE
HAIL...GUSTY WINDS...AND BRIEF HEAVY DOWNPOURS.

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

ANOTHER STORM SYSTEM IS EXPECTED TO IMPACT THE AREA TUESDAY NIGHT AND
MAY IMPACT THE AREA THROUGH THURSDAY. THERE ARE STILL SOME TIMING AND
STRENGTH ISSUES TO OVERCOME...BUT MODELS AGREE THAT THERE IS A
CHANCE OF SEVERE WEATHER. AT THIS TIME...HAIL AND DAMAGING WINDS
APPEAR TO BE THE THREATS. CONFIDENCE REMAINS LOW AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

ACTIVATION OF STORM SPOTTERS AND EMERGENCY MANAGEMENT MAY BE
NECESSARY TUESDAY EVENING THROUGH THURSDAY.

75

In the hours before

Local storm report, Mar 28, 1:48 AM CDT, 59 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
148 AM CDT MON MAR 28 2011

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

0147 AM     HAIL             MAYLENE                 33.20N 86.86W
03/28/2011  E0.88 INCH       SHELBY             AL   AMATEUR RADIO

            AT STERLING GATE SUBDIVISION

&&

LINHARES

Local storm report, Mar 28, 1:55 AM CDT, 52 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
155 AM CDT MON MAR 28 2011

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

0145 AM     HAIL             IRONDALE                33.54N 86.71W
03/28/2011  E0.25 INCH       JEFFERSON          AL   NWS EMPLOYEE

&&

LINHARES

Special weather statement, Mar 28, 2:10 AM CDT, 37 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
210 AM CDT MON MAR 28 2011

ALZ011>013-280800-
FAYETTE AL-LAMAR AL-MARION AL-
210 AM CDT MON MAR 28 2011

...SIGNIFICANT WEATHER ADVISORY FOR MARION...NORTHERN LAMAR AND
NORTHERN FAYETTE COUNTIES UNTIL 300 AM CDT...

AT 209 AM CDT...THE NATIONAL WEATHER SERVICE WAS TRACKING A STRONG
THUNDERSTORM NEAR AMORY...MOVING EAST AT 60 MPH.

PEA SIZE HAIL AND WIND GUSTS UP TO 40 MPH ARE EXPECTED WITH THIS
STORM...ALONG WITH HEAVY RAIN AND FREQUENT DANGEROUS LIGHTNING.

LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...
  SULLIGENT...
  HAMILTON...
  WINFIELD...
  DETROIT...
  LAMAR COUNTY AIRPORT...

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 3414 8820 3426 8764 3387 8764 3387 8753
      3382 8753 3380 8825
TIME...MOT...LOC 0711Z 262DEG 54KT 3396 8846

27

Local storm report, Mar 28, 2:13 AM CDT, 34 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
213 AM CDT MON MAR 28 2011

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

0158 AM     HAIL             2 S MOODY               33.57N 86.49W
03/28/2011  E1.00 INCH       ST. CLAIR          AL   LAW ENFORCEMENT

            QUARTER SIZE HAIL ON I-20 AT MOODY EXIT

&&

LINHARES

Local storm report, Mar 28, 2:28 AM CDT, 19 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
228 AM CDT MON MAR 28 2011

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

1055 PM     HAIL             VINCENT                 33.39N 86.41W
03/26/2011  E1.00 INCH       SHELBY             AL   LAW ENFORCEMENT

&&

LINHARES

Special weather statement, Mar 28, 2:47 AM CDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
247 AM CDT MON MAR 28 2011

ALZ021-027>029-280830-
CLAY AL-CLEBURNE AL-RANDOLPH AL-TALLADEGA AL-
247 AM CDT MON MAR 28 2011

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHERN CLEBURNE...EASTERN
TALLADEGA...NORTHERN RANDOLPH AND NORTHEASTERN CLAY COUNTIES UNTIL
330 AM CDT...

AT 242 AM CDT...THE NATIONAL WEATHER SERVICE WAS TRACKING A STRONG
THUNDERSTORM NEAR TALLADEGA...MOVING EAST AT 50 MPH.

PEA SIZE HAIL IS EXPECTED WITH THIS STORM...ALONG WITH FREQUENT
DANGEROUS LIGHTNING.

LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...
  WALDO...
  GRANT TOWN...
  MOUNT CHEAHA...
  FOSTERS CROSS ROADS...
  MORRISON CROSS ROADS...

&&

LAT...LON 3345 8530 3332 8615 3349 8620 3358 8579
      3355 8580 3355 8574 3360 8574 3369 8534
TIME...MOT...LOC 0747Z 257DEG 44KT 3342 8607

27

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 27, 7:03 PM CDT	Special Weather Statement	BMX	Barbour	42 min
Mar 27, 8:32 PM CDT	Special Weather Statement	BMX	Montgomery	43 min
Mar 27, 8:51 PM CDT	Special Weather Statement	BMX	Fayette, Lamar	39 min
Mar 27, 9:05 PM CDT	Special Weather Statement	BMX	Autauga	40 min
Mar 27, 9:34 PM CDT	Special Weather Statement	BMX	Walker, Winston	41 min
Mar 27, 9:43 PM CDT	Special Weather Statement	BMX	Coosa, Elmore, Tallapoosa	47 min
Mar 27, 10:15 PM CDT	Severe Thunderstorm Warning	BMX	Elmore, Lee, Macon, Tallapoosa	30 min
Mar 27, 10:30 PM CDT	Special Weather Statement	BMX	Winston	45 min
Mar 27, 10:31 PM CDT	Special Weather Statement	BMX	Chambers, Tallapoosa	44 min
Mar 27, 10:36 PM CDT	Severe Thunderstorm Warning	BMX	Lee, Macon, Russell	39 min
Mar 27, 11:13 PM CDT	Special Weather Statement	BMX	Russell	47 min
Mar 27, 11:16 PM CDT	Severe Thunderstorm Warning	BMX	Lee, Russell	29 min
Mar 27, 11:28 PM CDT	Special Weather Statement	BMX	Randolph	47 min
Mar 27, 11:30 PM CDT	Special Weather Statement	BMX	Blount	45 min
Mar 27, 11:58 PM CDT	Special Weather Statement	BMX	Etowah	47 min
Mar 28, 12:03 AM CDT	Severe Thunderstorm Warning	BMX	Marion	42 min
Mar 28, 12:31 AM CDT	Special Weather Statement	BMX	Tuscaloosa	44 min
Mar 28, 12:50 AM CDT	Special Weather Statement	BMX	Marion, Winston	40 min
Mar 28, 12:57 AM CDT	Severe Thunderstorm Warning	BMX	Bibb, Jefferson, Shelby, Tuscaloosa	48 min
Mar 28, 1:13 AM CDT	Severe Thunderstorm Warning	BMX	Jefferson, Shelby, Tuscaloosa	47 min
Mar 28, 1:32 AM CDT	Severe Thunderstorm Warning	BMX	Marion, Winston	43 min
Mar 28, 1:43 AM CDT	Special Weather Statement	BMX	Cleburne	47 min
Mar 28, 1:44 AM CDT	Severe Thunderstorm Warning	BMX	Shelby	28 min
Mar 28, 1:46 AM CDT	Special Weather Statement	BMX	Blount, Etowah	44 min
Mar 28, 1:50 AM CDT	Severe Thunderstorm Warning	BMX	Calhoun, Jefferson, St. Clair, Shelby, Talladega	40 min
Mar 28, 2:10 AM CDT	Special Weather Statement	BMX	Marion	50 min
Mar 28, 2:25 AM CDT	Severe Thunderstorm Warning	BMX	Calhoun, Cleburne	31 min
Mar 28, 2:42 AM CDT	Severe Thunderstorm Warning	BMX	Calhoun, Cleburne	14 min
Mar 28, 3:16 AM CDT	Special Weather Statement	BMX	Jefferson, St. Clair	44 min
Mar 28, 3:21 AM CDT	Special Weather Statement	BMX	Marshall	39 min
Mar 28, 3:24 AM CDT	Special Weather Statement	BMX	Etowah	51 min
Mar 28, 3:25 AM CDT	Special Weather Statement	BMX	Cleburne	20 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.