Alert archive / Alabama / Special Weather Statements in 2012

Special Weather Statement, NWS Huntsville, AL

July 8, 2012DeKalb County, Alabama

NWS Huntsville, AL issued this special weather statement at Jul 8, 2012, 12:13 PM CDT for DeKalb County, Alabama. It was in force for 32 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: Jul 8, 2012, 12:13 PM CDT (17:13 UTC)
Expired: Jul 8, 2012, 12:45 PM CDT
In force: 32 min
Issued by: NWS Huntsville, AL

County DeKalb County, AL

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 5.2 hours before the alert went out and 152 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: 1274 J/kg
Mixed-layer CIN: -81 J/kg
Mixed-layer LCL: 898 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: -16 m²/s²
0-3 km storm-relative helicity: -19 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 Huntsville, AL wrote its last area forecast discussion before this special weather statement went out at Jul 8, 10:41 AM CDT, 1 hour 32 minutes earlier.

Area forecast discussion, Jul 8, 10:41 AM CDT, 1 hour 32 minutes before

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Hazardous weather outlook, Jul 8, 5:05 AM CDT, 7 hours 8 minutes before

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In the hours before

Special weather statement, Jul 8, 12:13 PM CDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HUNTSVILLE AL
1213 PM CDT SUN JUL 8 2012

ALZ010-081745-
DE KALB-
1213 PM CDT SUN JUL 8 2012

...SIGNIFICANT WEATHER ADVISORY FOR DEKALB COUNTY UNTIL 1245 PM
CDT...

AT 1210 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
A STRONG THUNDERSTORM NEAR COLLINSVILLE...OR 14 MILES WEST OF
CENTRE...MOVING NORTHEAST AT 25 MPH.

PEA SIZE HAIL...WINDS UP TO 40 MPH...AND HEAVY DOWNPOURS ARE EXPECTED
WITH THIS STORM.

* LOCATIONS IN OR NEAR THE PATH INCLUDE...
  COLLINSVILLE.
  LEBANON...PEEKS CORNER.
  DOG TOWN...COLLBRAN.

THE GUSTY WINDS WILL BE CAPABLE OF KNOCKING DOWN SMALL TREE LIMBS.
SEEK SAFE SHELTER UNTIL THE STORM HAS PASSED.

STAY TUNED TO NOAA WEATHER RADIO...COMMERCIAL RADIO...OR YOUR LOCAL
TELEVISION STATIONS FOR LATER STATEMENTS AND POSSIBLE WARNINGS
CONCERNING THIS WEATHER SITUATION.

&&

LAT...LON 3436 8566 3425 8578 3425 8580 3424 8581
      3423 8584 3420 8584 3419 8584 3420 8603
      3422 8605 3449 8579 3437 8562
TIME...MOT...LOC 1713Z 225DEG 20KT 3422 8589

KDW

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 8, 1:15 AM CDT	Special Weather Statement	HUN	Lawrence	30 min
Jul 8, 1:44 AM CDT	Special Weather Statement	HUN	Lawrence	31 min
Jul 8, 2:53 AM CDT	Special Weather Statement	HUN	Colbert	52 min
Jul 8, 3:42 AM CDT	Special Weather Statement	HUN	Colbert	48 min
Jul 8, 4:54 AM CDT	Special Weather Statement	HUN	Lauderdale	51 min
Jul 8, 12:45 PM CDT	Special Weather Statement	HUN	DeKalb	30 min
Jul 8, 1:31 PM CDT	Special Weather Statement	HUN	Colbert, Lauderdale	44 min
Jul 8, 1:45 PM CDT	Severe Thunderstorm Warning	HUN	Colbert, Lauderdale	30 min
Jul 8, 2:07 PM CDT	Special Weather Statement	HUN	Madison	38 min
Jul 8, 2:44 PM CDT	Special Weather Statement	HUN	Lawrence	46 min
Jul 8, 2:51 PM CDT	Special Weather Statement	HUN	Marshall	39 min
Jul 8, 3:00 PM CDT	Special Weather Statement	HUN	Madison	45 min
Jul 8, 3:15 PM CDT	Severe Thunderstorm Warning	HUN	Franklin	30 min
Jul 8, 3:33 PM CDT	Special Weather Statement	HUN	Marshall	27 min
Jul 8, 3:39 PM CDT	Special Weather Statement	HUN	Limestone	51 min
Jul 8, 3:56 PM CDT	Special Weather Statement	HUN	Marshall	49 min
Jul 8, 4:11 PM CDT	Special Weather Statement	HUN	Lawrence	49 min
Jul 8, 4:25 PM CDT	Severe Thunderstorm Warning	HUN	Limestone, Morgan	50 min
Jul 8, 5:10 PM CDT	Special Weather Statement	HUN	Morgan	50 min

Nearby

Special Weather Statements in Alabama, 2012 Every special weather statement in 2012

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.