Alert archive / Texas / Wind Chill Advisories in 2011

Wind Chill Advisory 1, NWS Fort Worth, TX

February 1, 201146 counties in Texas

NWS Fort Worth, TX issued this wind chill advisory at Feb 1, 2011, 5:27 AM CST for 46 counties in Texas. It took effect at Feb 1, 2011, 6:00 AM CST. It was in force for 53 hr.

The area

The counties it named.

The facts

Issued: Feb 1, 2011, 5:27 AM CST (11:27 UTC)
In effect from: Feb 1, 2011, 6:00 AM CST
Expired: Feb 3, 2011, 10:42 AM CST
In force: 53 hr
Issued by: NWS Fort Worth, TX

All 46 counties

Anderson County, TX, Bell County, TX, Bosque County, TX, Collin County, TX, Comanche County, TX, Cooke County, TX, Coryell County, TX, Dallas County, TX, Delta County, TX, Denton County, TX, Eastland County, TX, Ellis County, TX, Erath County, TX, Falls County, TX, Fannin County, TX, Freestone County, TX, Grayson County, TX, Hamilton County, TX, Henderson County, TX, Hill County, TX, Hood County, TX, Hopkins County, TX, Hunt County, TX, Jack County, TX, Johnson County, TX, Kaufman County, TX, Lamar County, TX, Lampasas County, TX, Leon County, TX, Limestone County, TX, McLennan County, TX, Milam County, TX, Mills County, TX, Montague County, TX, Navarro County, TX, Palo Pinto County, TX, Parker County, TX, Rains County, TX, Robertson County, TX, Rockwall County, TX, Somervell County, TX, Stephens County, TX, Tarrant County, TX, Van Zandt County, TX, Wise County, TX, Young County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 27 km from the middle of the area, began a volume at 11:30 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

Fort Worth, TX (KFWD), launched 00:00Z, 11.5 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 640 m above ground
0-6 km bulk shear: 67 kt
0-1 km storm-relative helicity: 458 m²/s²
0-3 km storm-relative helicity: 447 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this wind chill advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Fort Worth, TX wrote its last area forecast discussion before this wind chill advisory went out at Feb 1, 5:12 AM CST, 15 minutes earlier.

Area forecast discussion, Feb 1, 5:12 AM CST, 15 minutes before

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Hazardous weather outlook, Jan 31, 4:02 PM CST, 13 hours 25 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE FORT WORTH TX
402 PM CST MON JAN 31 2011

TXZ091>095-100>107-115>123-129>135-141>148-156>162-174-175-011230-
MONTAGUE-COOKE-GRAYSON-FANNIN-LAMAR-YOUNG-JACK-WISE-DENTON-COLLIN-
HUNT-DELTA-HOPKINS-STEPHENS-PALO PINTO-PARKER-TARRANT-DALLAS-
ROCKWALL-KAUFMAN-VAN ZANDT-RAINS-EASTLAND-ERATH-HOOD-SOMERVELL-
JOHNSON-ELLIS-HENDERSON-COMANCHE-MILLS-HAMILTON-BOSQUE-HILL-NAVARRO-
FREESTONE-ANDERSON-LAMPASAS-CORYELL-BELL-MCLENNAN-FALLS-LIMESTONE-
LEON-MILAM-ROBERTSON-
402 PM CST MON JAN 31 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH TEXAS.

.DAY ONE...TONIGHT.

ISOLATED SEVERE THUNDERSTORMS ARE POSSIBLE THROUGH THIS EVENING
MAINLY SOUTHWEST OF A BRECKENRIDGE...CORSICANA...PALESTINE LINE.
LARGE HAIL WILL BE THE MAIN THREAT.

A VERY STRONG COLD FRONT WILL BEGIN TO PUSH THROUGH NORTH TEXAS
OVERNIGHT. VERY COLD TEMPERATURES WILL QUICKLY FILTER INTO THE
REGION BEHIND THE FRONT...CHANGING THE RAIN TO FREEZING
RAIN...SLEET OR SNOW ALONG AND NORTHWEST OF A GOLDTHWAITE TO
DALLAS TO SHERMAN LINE BY MORNING. A WINTER STORM WARNING IS IN
EFFECT ALONG AND NORTH OF THIS LINE AFTER MIDNIGHT.

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

SUB-FREEZING TEMPERATURES WILL CONTINUE TO QUICKLY MOVE INTO THE
REGION THROUGHOUT THE DAY ON TUESDAY. THE RAIN IS EXPECTED TO
CHANGE INTO FREEZING RAIN...SLEET OR SNOW FOR MOST OF NORTH TEXAS
BY THE AFTERNOON. HOWEVER...PRECIPITATION CHANCES WILL DWINDLE
AFTER NOON FROM WEST TO EAST AS MOISTURE EXITS THE REGION.

A WINTER STORM WARNING WILL REMAIN IN EFFECT ALONG AND NORTHWEST
OF A GOLDTHWAITE TO DALLAS TO SHERMAN LINE THROUGH 3 PM TUESDAY.
A WINTER WEATHER ADVISORY WILL BE IN EFFECT FARTHER SOUTH TO
INCLUDE AREAS NORTHWEST OF A LAMPASAS TO ATHENS LINE THROUGH 3
PM.

WIND CHILLS WILL DROP BELOW ZERO FOR AREAS NORTH OF A LAMPASAS TO
ENNIS TO PARIS LINE TUESDAY NIGHT WITH SINGLE DIGITS ELSEWHERE.
ANOTHER NIGHT OF SINGLE DIGIT AND BELOW ZERO WIND CHILLS IS
POSSIBLE WEDNESDAY NIGHT.

THERE IS A SLIGHT CHANCE OF SNOW THURSDAY NIGHT AND FRIDAY
ACROSS ALL OF NORTH TEXAS.

.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION MAY BE REQUESTED ALONG AND SOUTHWEST OF A
BRECKENRIDGE...CORSICANA...PALESTINE LINE.

In the hours before

Local storm report, Feb 1, 1:44 AM CST, 3 hours 43 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FORT WORTH TX
144 AM CST TUE FEB 01 2011

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

0143 AM     HEAVY SLEET      BOWIE                   33.57N  97.85W
02/01/2011  E0.75 INCH       MONTAGUE           TX   TRAINED SPOTTER

            3/4 OF AN INCH OF SLEET HAS ALREADY FALLEN. ROADS HAVE
            BECOME TREACHEROUS.

Local storm report, Feb 1, 2:21 AM CST, 3 hours 6 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FORT WORTH TX
221 AM CST TUE FEB 01 2011

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

0205 AM     HEAVY SLEET      JACKSBORO               33.22N  98.17W
02/01/2011  E0.50 INCH       JACK               TX   TRAINED SPOTTER

Local storm report, Feb 1, 2:23 AM CST, 3 hours 4 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FORT WORTH TX
223 AM CST TUE FEB 01 2011

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

0218 AM     HEAVY SNOW       OLNEY                   33.37N  98.77W
02/01/2011  E4.00 INCH       YOUNG              TX   DEPT OF HIGHWAYS

            TRAVEL IS TREACHEROUS AND NOT ADVISED

Special weather statement, Feb 1, 2:33 AM CST, 2 hours 54 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE FORT WORTH TX
233 AM CST TUE FEB 1 2011

TXZ156>158-010900-
CORYELL TX-LAMPASAS TX-BELL TX-
233 AM CST TUE FEB 1 2011

...SIGNIFICANT WEATHER ADVISORY FOR...
  WESTERN BELL COUNTY
  SOUTHERN CORYELL COUNTY
  SOUTHEASTERN LAMPASAS COUNTY

AT 233 AM CST...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
STRONG THUNDERSTORM 8 MILES SOUTHWEST OF COPPERAS COVE...MOVING EAST
AT 50 MPH.

CITIES IN THE PATH OF THIS STORM INCLUDE COPPERAS COVE...FORT HOOD...
HARKER HEIGHTS...KILLEEN AND NOLANVILLE.

PENNY-SIZED HAIL AND WIND GUSTS TO 50 MPH CAN BE EXPECTED FROM THIS
STORM.

LAT...LON 3091 9784 3104 9792 3103 9793 3103 9813
      3125 9798 3137 9764 3090 9758
TIME...MOT...LOC 0833Z 252DEG 46KT 3108 9799

Local storm report, Feb 1, 4:40 AM CST, 47 minutes before

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Special weather statement, Feb 1, 4:53 AM CST, 34 minutes before

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The office that day

Everything else NWS Fort Worth, TX issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Feb 1, 2:33 AM CST	Special Weather Statement	FWD	Coryell	27 min
Feb 1, 4:08 AM CST	Wind Advisory	FWD	Anderson, Bell, Bosque, Collin, Comanche, Cooke and 40 more	14 hr
Feb 1, 4:53 AM CST	Special Weather Statement	FWD	Anderson, Leon	37 min
Feb 1, 12:12 PM CST	Hard Freeze Warning	FWD	Anderson, Bell, Bosque, Collin, Comanche, Cooke and 40 more	46 hr

Nearby

Wind Chill Advisories in Texas, 2011 Every wind chill advisory 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.