Alert archive / Arkansas / Winter Storm Warnings in 2012

Winter Storm Warning 1, NWS Shreveport, LA

December 25, 20127 counties in Arkansas; Bowie County, Red River County, Texas; McCurtain County, Oklahoma

NWS Shreveport, LA issued this winter storm warning at Dec 25, 2012, 2:30 AM CST for 7 counties in Arkansas; Bowie County, Red River County, Texas; McCurtain County, Oklahoma. It took effect at Dec 25, 2012, 3:00 PM CST. It was in force for 6 hr. 13 reports came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
Dec 25, 2012, 2:30 AM CST (08:30 UTC)
In effect from
Dec 25, 2012, 3:00 PM CST
Expired
Dec 25, 2012, 9:20 PM CST
In force
6 hr
Issued by
NWS Shreveport, LA

Counties Hempstead County, AR, Howard County, AR, Lafayette County, AR, Little River County, AR, Miller County, AR, Nevada County, AR, Sevier County, AR, McCurtain County, OK, Bowie County, TX, Red River County, TX

The radar

The Shreveport radar (KSHV), 140 km from the middle of the area, began a volume at 08:31 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.

What was reported inside it

TimeReportWhereRemark
Dec 25, 5:05 PM CSTSNOW 3Broken Bow, OK
Dec 25, 5:30 PM CSTSNOW 3Wake Village, TX
Dec 25, 6:17 PM CSTSNOW 1.2Texarkana, ARONE AND ONE QUARTER INCH MEASURED BY LOCAL EMERGENCY MANAGEMENT.
Dec 25, 6:48 PM CSTSNOW 4De Kalb, TX4 INCHES MEASURED IN DEKALB AND STILL SNOWING HEAVILY AT OBSERVATION.
Dec 25, 7:12 PM CSTSNOW 2Ashdown, ARSTILL SNOWING AT TIME OF OBSERVATION.
Dec 25, 7:12 PM CSTSNOW 2.2N Nashville, ARMEASURED TOTAL NORTH OF NASHVILLE. STILL SNOWING AT OBSERVATION TIME.
Dec 25, 7:12 PM CSTSNOW 3S Dierks, ARTHREE INCHES MEASURED SOUTH OF DIERKS. STILL SNOWING AT TIME OF OBSERVATION.
Dec 25, 7:30 PM CSTSNOW 5Broken Bow, OK5 INCHES MEASURED AS OF 730 PM. STILL SNOWING AT OBSERVATION TIME.
Dec 25, 7:42 PM CSTSNOW 4Clarksville, TXMEASURED IN TOWN. STILL SNOWING LIGHTLY AT OBSERVATION.
Dec 25, 7:45 PM CSTSNOW 4De Queen, AR4 INCHES MEASURED IN TOWN. STILL SNOWING AT OBSERVATION TIME.
Dec 25, 7:45 PM CSTSNOW 510 N Dierks, ARLAW ENFORCEMENT MEASURED 5 INCHES IN UMPIRE WITH SNOW STILL FALLING AT OBSERVATION.
Dec 25, 8:11 PM CSTSNOW 7.2De Kalb, TXMEASURED READING FROM COOPERATIVE OBSERVER ON A SNOWBOARD. STILL SNOWING AT OBSERVATION TIME.
Dec 25, 9:30 PM CSTSNOW 5Detroit, TX

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Shreveport, LA (KSHV), launched 00:00Z, 8.5 hours before the alert went out and 139 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-pSkew-T log-p diagram, Shreveport, LA at 00:00Z on 2012-12-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Shreveport, LA at 00:00Z on 2012-12-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 67 square meters per square second.1939587897117Sfc1 km3 km6 km9 kmRMLM
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
1948 m above ground
0-6 km bulk shear
45 kt
0-1 km storm-relative helicity
67 m²/s²
0-3 km storm-relative helicity
124 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.

122 
WWUS44 KSHV 250830
WSWSHV

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE SHREVEPORT LA
230 AM CST TUE DEC 25 2012

...SNOW ACCUMULATIONS POSSIBLE LATE ON CHRISTMAS DAY THROUGH
TUESDAY NIGHT ALONG I-30 CORRIDOR...

OKZ077-252200-
/O.UPG.KSHV.WW.Y.0002.121225T2100Z-121226T0600Z/
/O.NEW.KSHV.WS.W.0001.121225T2100Z-121226T0600Z/
MCCURTAIN-
INCLUDING THE CITY OF...IDABEL
230 AM CST TUE DEC 25 2012

...WINTER STORM WARNING IN EFFECT FROM 3 PM THIS AFTERNOON TO
MIDNIGHT CST TONIGHT...

THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A WINTER
STORM WARNING FOR MCCURTAIN COUNTY...WHICH IS IN EFFECT FROM 3 PM THIS
AFTERNOON TO MIDNIGHT CST TONIGHT. THE WINTER WEATHER ADVISORY IS
NO LONGER IN EFFECT.

* EVENT...A POWERFUL STORM SYSTEM IS MOVING INTO THE REGION
  TODAY...BRINGING HEAVY SNOW TO PORTIONS OF SOUTHEAST OKLAHOMA LATE
  ON CHRISTMAS DAY THROUGH TUESDAY NIGHT. SNOWFALL ACCUMULATIONS
  OF 4 TO 6 INCHES WILL BE POSSIBLE ACROSS THE WARNING AREA
  THROUGH TUESDAY NIGHT.

* TIMING...RAIN WILL BEGIN TO TRANSITION TO ALL SNOW LATE TUESDAY
  AFTERNOON OVER SOUTHEAST OKLAHOMA AND WILL CONTINUE THROUGH
  TUESDAY NIGHT.

* IMPACT...ROADWAYS MAY BECOME HAZARDOUS DUE TO SNOW ACCUMULATIONS
  OF 4 TO 6 INCHES AND POSSIBLY ICE IF PREVIOUS RAIN WATER AND
  MELTED SNOW REFREEZES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING FOR HEAVY SNOW MEANS SEVERE WINTER WEATHER
CONDITIONS ARE EXPECTED. SIGNIFICANT AMOUNTS OF SNOW ARE FORECAST
THAT WILL MAKE TRAVEL DANGEROUS. ONLY TRAVEL IN AN EMERGENCY. IF
YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT... FOOD...AND WATER IN
YOUR VEHICLE IN CASE OF AN EMERGENCY.

&&

$$

ARZ050-051-059-070-TXZ096-097-108>112-252200-
/O.CON.KSHV.WW.Y.0002.121225T2100Z-121226T0600Z/
SEVIER-HOWARD-LITTLE RIVER-MILLER-RED RIVER-BOWIE-FRANKLIN-TITUS-
CAMP-MORRIS-CASS-
INCLUDING THE CITIES OF...DE QUEEN...NASHVILLE...ASHDOWN...
TEXARKANA...CLARKSVILLE...MT VERNON...MT PLEASANT...PITTSBURG...
DAINGERFIELD...ATLANTA
230 AM CST TUE DEC 25 2012

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 3 PM THIS
AFTERNOON TO MIDNIGHT CST TONIGHT...

* EVENT...A POWERFUL STORM SYSTEM IS MOVING INTO THE REGION TODAY...BRINGING
  ACCUMULATING SNOW TO PORTIONS OF SOUTHEAST OKLAHOMA...NORTHEAST
  TEXAS AND SOUTHWEST ARKANSAS LATE ON CHRISTMAS DAY THROUGH
  TUESDAY NIGHT. SNOWFALL ACCUMULATIONS OF ONE TO THREE INCHES
  WILL BE POSSIBLE ACROSS THE ADVISORY AREA THROUGH TUESDAY NIGHT.

* TIMING...RAIN WILL BEGIN TO TRANSITION TO A WINTRY MIX BY MID 
  AFTERNOON TUESDAY. THE PRECIPITATION WILL TRANSITION TO ALL 
  SNOW LATE TUESDAY AFTERNOON OVER SOUTHEAST OKLAHOMA AND 
  ADJACENT SECTIONS OF SOUTHWEST ARKANSAS...AND WILL CONTINUE 
  THROUGH TUESDAY NIGHT. 

* IMPACT...ROADWAYS MAY BECOME HAZARDOUS DUE TO SNOW 
  ACCUMULATIONS AND POSSIBLY ICE IF PREVIOUS RAIN WATER AND 
  MELTED SNOW REFREEZES. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW
WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW
COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE
DRIVING.

&&

$$

ARZ060-061-071-072-252200-
/O.CON.KSHV.WS.A.0002.121226T0000Z-121226T0600Z/
HEMPSTEAD-NEVADA-LAFAYETTE-COLUMBIA-
INCLUDING THE CITIES OF...HOPE...PRESCOTT...LEWISVILLE...MAGNOLIA
230 AM CST TUE DEC 25 2012

...WINTER STORM WATCH REMAINS IN EFFECT THIS EVENING...

* EVENT...A POWERFUL STORM SYSTEM WILL MOVE THROUGH THE REGION 
  TODAY...WHICH MAY BRING ACCUMULATING SNOW TO THE 
  NORTHERN SECTIONS OF SOUTHWEST ARKANSAS TUESDAY EVENING. 

* TIMING...RAIN WILL BEGIN TO TRANSITION TO A WINTRY MIX BY 
  EARLY EVENING TUESDAY. THE PRECIPITATION WILL TRANSITION TO 
  ALL SNOW BY MID TO LATE EVENING TUESDAY...AND CONTINUE THROUGH 
  TUESDAY NIGHT. 

* IMPACT...ROADWAYS MAY BECOME HAZARDOUS DUE TO SNOW 
  ACCUMULATIONS AND POSSIBLY ICE IF PREVIOUS RAIN WATER AND 
  MELTED SNOW REFREEZES. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WATCH MEANS THERE IS A POTENTIAL FOR SIGNIFICANT
SNOW...SLEET...OR ICE ACCUMULATIONS THAT MAY IMPACT TRAVEL.
CONTINUE TO MONITOR THE LATEST FORECASTS.

&&

$$

20
3 follow-up statements
669 
WWUS44 KSHV 251532
WSWSHV

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE SHREVEPORT LA
932 AM CST TUE DEC 25 2012

...SNOW ACCUMULATIONS POSSIBLE LATE THIS AFTERNOON AND TONIGHT ALONG
AND NORTH OF THE I-30 CORRIDOR OF NORTHEAST TEXAS...SOUTHEAST
OKLAHOMA...AND SOUTHWEST ARKANSAS...

ARZ050-051-059-TXZ096-097-252300-
/O.UPG.KSHV.WW.Y.0002.121225T2100Z-121226T0600Z/
/O.EXB.KSHV.WS.W.0001.121225T2100Z-121226T1000Z/
SEVIER-HOWARD-LITTLE RIVER-RED RIVER-BOWIE-
INCLUDING THE CITIES OF...DE QUEEN...NASHVILLE...ASHDOWN...
CLARKSVILLE...TEXARKANA
932 AM CST TUE DEC 25 2012

...WINTER STORM WARNING IN EFFECT FROM 3 PM THIS AFTERNOON TO
4 AM CST WEDNESDAY...

THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A WINTER
STORM WARNING FOR SNOW...WHICH IS IN EFFECT FROM 3 PM THIS
AFTERNOON TO 4 AM CST WEDNESDAY. THE WINTER WEATHER ADVISORY IS NO
LONGER IN EFFECT.

* EVENT...A POWERFUL STORM SYSTEM WILL MOVE THROUGH THE REGION
  THIS AFTERNOON...BRINGING ACCUMULATING SNOW TO PORTIONS OF
  SOUTHEAST OKLAHOMA...NORTHEAST TEXAS AND SOUTHWEST ARKANSAS LATE
  THIS AFTERNOON AND TONIGHT. SNOWFALL ACCUMULATIONS OF FOUR TO
  SIX INCHES WILL BE POSSIBLE ACROSS THE WARNING AREA THROUGH
  TONIGHT...WITH THE HIGHER SNOWFALL TOTALS OF FIVE TO SIX INCHES
  EXPECTED GENERALLY NORTH OF AN ASHDOWN ARKANSAS...TO NASHVILLE LINE.

* TIMING...RAIN WILL BEGIN TO TRANSITION TO A WINTRY MIX BY MID
  AFTERNOON. THE PRECIPITATION WILL TRANSITION TO ALL SNOW LATE
  THIS AFTERNOON AND CONTINUE THROUGH TONIGHT.

* IMPACT...ROADWAYS MAY BECOME HAZARDOUS DUE TO SNOW ACCUMULATIONS
  AND POSSIBLY ICE IF PREVIOUS RAIN WATER AND MELTED SNOW REFREEZES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING FOR HEAVY SNOW MEANS SEVERE WINTER WEATHER
CONDITIONS ARE EXPECTED OR OCCURRING. SIGNIFICANT AMOUNTS OF SNOW
ARE FORECAST THAT WILL MAKE TRAVEL DANGEROUS. ONLY TRAVEL IN AN
EMERGENCY. IF YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT...
FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY.

&&

$$

OKZ077-252300-
/O.EXT.KSHV.WS.W.0001.121225T2100Z-121226T1000Z/
MCCURTAIN-
INCLUDING THE CITY OF...IDABEL
932 AM CST TUE DEC 25 2012

...WINTER STORM WARNING NOW IN EFFECT FROM 3 PM THIS AFTERNOON TO
4 AM CST WEDNESDAY...

* EVENT...A POWERFUL STORM SYSTEM WILL MOVE THROUGH THE REGION
  THIS AFTERNOON...BRINGING ACCUMULATING SNOW TO SOUTHEAST
  OKLAHOMA...LATE THIS AFTERNOON AND TONIGHT. SNOWFALL
  ACCUMULATIONS OF FOUR TO SIX INCHES...WITH ISOLATED HIGHER
  AMOUNTS UP TO EIGHT INCHES IN THE HIGHER ELEVATIONS OF NORTHERN
  MCCURTAIN COUNTY...WILL BE POSSIBLE THROUGH TONIGHT.

* TIMING...RAIN WILL BEGIN TO TRANSITION TO ALL SNOW LATE THIS
  AFTERNOON AND WILL CONTINUE THROUGH TONIGHT.

* IMPACT...ROADWAYS WILL BECOME HAZARDOUS DUE TO SNOW ACCUMULATIONS
  AND POSSIBLY ICE IF PREVIOUS RAIN WATER AND MELTED SNOW
  REFREEZES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING FOR HEAVY SNOW MEANS SEVERE WINTER WEATHER
CONDITIONS ARE EXPECTED. SIGNIFICANT AMOUNTS OF SNOW ARE FORECAST
THAT WILL MAKE TRAVEL DANGEROUS. ONLY TRAVEL IN AN EMERGENCY. IF
YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT...FOOD...AND WATER IN
YOUR VEHICLE IN CASE OF AN EMERGENCY.

&&

$$

ARZ060-061-071-072-252300-
/O.UPG.KSHV.WS.A.0002.121226T0000Z-121226T0600Z/
/O.EXB.KSHV.WW.Y.0002.121225T2100Z-121226T1000Z/
HEMPSTEAD-NEVADA-LAFAYETTE-COLUMBIA-
INCLUDING THE CITIES OF...HOPE...PRESCOTT...LEWISVILLE...MAGNOLIA
932 AM CST TUE DEC 25 2012

...WINTER WEATHER ADVISORY IN EFFECT FROM 3 PM THIS AFTERNOON TO
4 AM CST WEDNESDAY...

THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A WINTER
WEATHER ADVISORY FOR SNOW...WHICH IS IN EFFECT FROM 3 PM THIS
AFTERNOON TO 4 AM CST WEDNESDAY. THE WINTER STORM WATCH IS NO
LONGER IN EFFECT.

* EVENT...A POWERFUL STORM SYSTEM WILL MOVE THROUGH THE REGION
  THIS AFTERNOON...BRINGING ACCUMULATING SNOW TO PORTIONS OF
  SOUTHWEST ARKANSAS LATE THIS AFTERNOON AND TONIGHT. SNOWFALL
  ACCUMULATIONS OF ONE TO THREE INCHES WILL BE POSSIBLE ACROSS THE
  ADVISORY AREA THROUGH TONIGHT.

* TIMING...RAIN WILL BEGIN TO TRANSITION TO A WINTRY MIX BY LATE
  THIS AFTERNOON...TRANSITIONING TO ALL SNOW BY EARLY TO MID
  EVENING AND CONTINUING THROUGH TONIGHT.

* IMPACT...ROADWAYS MAY BECOME HAZARDOUS DUE TO SNOW 
  ACCUMULATIONS AND POSSIBLY ICE IF PREVIOUS RAIN WATER AND 
  MELTED SNOW REFREEZES. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW
WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW
COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE
DRIVING.

&&

$$

ARZ070-TXZ108>112-252300-
/O.EXT.KSHV.WW.Y.0002.121225T2100Z-121226T1000Z/
MILLER-FRANKLIN-TITUS-CAMP-MORRIS-CASS-
INCLUDING THE CITIES OF...TEXARKANA...MT VERNON...MT PLEASANT...
PITTSBURG...DAINGERFIELD...ATLANTA
932 AM CST TUE DEC 25 2012

...WINTER WEATHER ADVISORY NOW IN EFFECT FROM 3 PM THIS AFTERNOON
TO 4 AM CST WEDNESDAY...

* EVENT...A POWERFUL STORM SYSTEM WILL MOVE THROUGH THE REGION
  THIS AFTERNOON...BRINGING ACCUMULATING SNOW TO PORTIONS OF
  EXTREME NORTHEAST TEXAS LATE THIS AFTERNOON AND TONIGHT.
  SNOWFALL ACCUMULATIONS OF ONE TO THREE INCHES WILL BE POSSIBLE
  ACROSS THE ADVISORY AREA THROUGH TONIGHT.

* TIMING...RAIN WILL BEGIN TO TRANSITION TO A WINTRY MIX BY MID
  AFTERNOON...BEFORE TRANSITIONING TO ALL SNOW LATE THIS AFTERNOON
  AND EARLY EVENING AND WILL CONTINUE THROUGH TONIGHT.

* IMPACT...ROADWAYS MAY BECOME HAZARDOUS DUE TO SNOW 
  ACCUMULATIONS AND POSSIBLY ICE IF PREVIOUS RAIN WATER AND 
  MELTED SNOW REFREEZES. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW
WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW
COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE
DRIVING.

&&

$$

15
422 
WWUS44 KSHV 252243
WSWSHV

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE SHREVEPORT LA
443 PM CST TUE DEC 25 2012

...SNOW ACCUMULATIONS LIKELY THROUGH LATE TONIGHT ACROSS NORTHEAST
TEXAS...SOUTHEAST OKLAHOMA...AND SOUTHWEST ARKANSAS...

ARZ060-061-070-071-260500-
/O.UPG.KSHV.WW.Y.0002.000000T0000Z-121226T1000Z/
/O.EXA.KSHV.WS.W.0001.000000T0000Z-121226T1000Z/
HEMPSTEAD-NEVADA-MILLER-LAFAYETTE-
INCLUDING THE CITIES OF...HOPE...PRESCOTT...TEXARKANA...
LEWISVILLE
443 PM CST TUE DEC 25 2012

...WINTER STORM WARNING IN EFFECT UNTIL 4 AM CST WEDNESDAY...

THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A WINTER
STORM WARNING FOR HEAVY SNOW...WHICH IS IN EFFECT UNTIL 4 AM CST
WEDNESDAY. THE WINTER WEATHER ADVISORY IS NO LONGER IN EFFECT.

* EVENT...A POWERFUL STORM SYSTEM WILL MOVE THROUGH THE REGION
  TONIGHT...BRINGING ACCUMULATING SNOW TO MUCH OF SOUTHWEST
  ARKANSAS TONIGHT. IN ADDITION...A TIGHT PRESSURE GRADIENT WILL
  RESULT IN NORTHWEST WINDS GUSTING TO NEAR 35 MPH AT TIMES
  TONIGHT...CREATING AREAS OF BLOWING SNOW WHICH WILL REDUCE VISIBILITIES.
  SNOWFALL ACCUMULATIONS OF FOUR TO FIVE INCHES WILL BE POSSIBLE
  ACROSS THE WARNING AREA THROUGH TONIGHT.

* TIMING...A WINTRY MIX OF RAIN...SLEET...AND SNOW WILL QUICKLY
  TRANSITION TO ALL SNOW BY EARLY TO MID EVENING AND CONTINUE THROUGH
  TONIGHT.

* IMPACT...ROADWAYS MAY BECOME HAZARDOUS DUE TO SNOW 
  ACCUMULATIONS AND POSSIBLY ICE IF PREVIOUS RAIN WATER AND 
  MELTED SNOW REFREEZES. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING FOR BLOWING HEAVY SNOW MEANS SEVERE WINTER
WEATHER CONDITIONS ARE EXPECTED OR OCCURRING. SIGNIFICANT AMOUNTS
OF SNOW ARE FORECAST THAT WILL MAKE TRAVEL DANGEROUS. ONLY TRAVEL
IN AN EMERGENCY. IF YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT...
FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY.

&&

$$

ARZ050-051-059-OKZ077-TXZ096-097-260500-
/O.CON.KSHV.WS.W.0001.000000T0000Z-121226T1000Z/
SEVIER-HOWARD-LITTLE RIVER-MCCURTAIN-RED RIVER-BOWIE-
INCLUDING THE CITIES OF...DE QUEEN...NASHVILLE...ASHDOWN...
IDABEL...CLARKSVILLE...TEXARKANA
443 PM CST TUE DEC 25 2012

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 4 AM CST
WEDNESDAY...

* EVENT...A POWERFUL STORM SYSTEM WILL MOVE THROUGH THE REGION
  TONIGHT...BRINGING ACCUMULATING SNOW TO SOUTHEAST
  OKLAHOMA...EXTREME NORTHEAST TEXAS AND ADJACENT SOUTHWEST
  ARKANSAS. IN ADDITION...A TIGHT PRESSURE GRADIENT WILL RESULT IN
  NORTHWEST WINDS GUSTING TO NEAR 35 MPH AT TIMES
  TONIGHT...CREATING AREAS OF BLOWING SNOW WHICH WILL REDUCE
  VISIBILITIES. SNOWFALL ACCUMULATIONS OF FOUR TO SIX INCHES WILL
  BE POSSIBLE ACROSS THE WARNING AREA THROUGH TONIGHT...WITH HIGHER
  SNOWFALL TOTALS UP TO EIGHT INCHES EXPECTED GENERALLY NORTH OF A
  BROKEN BOW OKLAHOMA...TO ASHDOWN AND NASHVILLE ARKANSAS LINE.

* TIMING...A MIX OF RAIN...SLEET AND SNOW WILL QUICKLY TRANSITION
  OVER TO SNOW EARLY THIS EVENING...AND CONTINUE THROUGH TONIGHT.

* IMPACT...ROADWAYS MAY BECOME HAZARDOUS DUE TO SNOW 
  ACCUMULATIONS AND POSSIBLY ICE IF PREVIOUS RAIN WATER AND 
  MELTED SNOW REFREEZES. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING FOR BLOWING HEAVY SNOW MEANS SEVERE WINTER
WEATHER CONDITIONS ARE EXPECTED OR OCCURRING. SIGNIFICANT AMOUNTS
OF SNOW ARE FORECAST THAT WILL MAKE TRAVEL DANGEROUS. ONLY TRAVEL
IN AN EMERGENCY. IF YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT...
FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY.

&&

$$

ARZ073-TXZ124>126-136>138-260500-
/O.EXA.KSHV.WW.Y.0002.000000T0000Z-121226T1000Z/
UNION AR-WOOD-UPSHUR-MARION-SMITH-GREGG-HARRISON-
INCLUDING THE CITIES OF...EL DORADO...QUITMAN...GILMER...
JEFFERSON...TYLER...LONGVIEW...MARSHALL
443 PM CST TUE DEC 25 2012

...WINTER WEATHER ADVISORY IN EFFECT UNTIL 4 AM CST WEDNESDAY...

THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A WINTER
WEATHER ADVISORY FOR SNOW...WHICH IS IN EFFECT UNTIL 4 AM CST
WEDNESDAY.

* EVENT...A POWERFUL STORM SYSTEM WILL MOVE THROUGH THE REGION
  TONIGHT...BRINGING ACCUMULATING SNOW TO PORTIONS OF NORTHEAST
  TEXAS AND SOUTHWEST ARKANSAS. SNOWFALL ACCUMULATIONS OF ONE TO
  THREE INCHES WILL BE POSSIBLE ACROSS THE ADVISORY AREA THROUGH
  TONIGHT.

* TIMING...RAIN MIXED WITH SLEET AND SNOW WILL QUICKLY TRANSITION
  TO ALL SNOW LATE THIS EVENING AND CONTINUE THROUGH TONIGHT.

* IMPACT...ROADWAYS MAY BECOME HAZARDOUS DUE TO SNOW 
  ACCUMULATIONS AND POSSIBLY ICE IF PREVIOUS RAIN WATER AND 
  MELTED SNOW REFREEZES. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW
WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW
COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE
DRIVING.

&&

$$

ARZ072-TXZ108>112-260500-
/O.CON.KSHV.WW.Y.0002.000000T0000Z-121226T1000Z/
COLUMBIA-FRANKLIN-TITUS-CAMP-MORRIS-CASS-
INCLUDING THE CITIES OF...MAGNOLIA...MT VERNON...MT PLEASANT...
PITTSBURG...DAINGERFIELD...ATLANTA
443 PM CST TUE DEC 25 2012

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 AM CST
WEDNESDAY...

* EVENT...A POWERFUL STORM SYSTEM WILL MOVE THROUGH THE REGION
  TONIGHT...BRINGING ACCUMULATING SNOW TO PORTIONS OF EXTREME
  NORTHEAST TEXAS AND SOUTHWEST ARKANSAS. SNOWFALL ACCUMULATIONS
  OF ONE TO THREE INCHES WILL BE POSSIBLE ACROSS THE ADVISORY AREA
  THROUGH TONIGHT.

* TIMING...A WINTRY MIX OF RAIN...SLEET AND SNOW WILL QUICKLY
  TRANSITION TO ALL SNOW THIS EVENING...AND WILL CONTINUE THROUGH
  TONIGHT.

* IMPACT...ROADWAYS MAY BECOME HAZARDOUS DUE TO SNOW 
  ACCUMULATIONS AND POSSIBLY ICE IF PREVIOUS RAIN WATER AND 
  MELTED SNOW REFREEZES. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW
WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW
COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE
DRIVING.

&&

$$

15
208 
WWUS44 KSHV 260320 AAA
WSWSHV

URGENT - WINTER WEATHER MESSAGE...UPDATED
NATIONAL WEATHER SERVICE SHREVEPORT LA
920 PM CST TUE DEC 25 2012

...ADDITIONAL SNOW ACCUMULATIONS POSSIBLE THROUGH LATE TONIGHT
ACROSS NORTHEAST TEXAS...SOUTHEAST OKLAHOMA AND SOUTHWEST ARKANSAS...

ARZ050-051-059>061-070-071-OKZ077-TXZ096-097-261000-
/O.CAN.KSHV.WS.W.0001.000000T0000Z-121226T1000Z/
/O.EXA.KSHV.WW.Y.0002.000000T0000Z-121226T1000Z/
SEVIER-HOWARD-LITTLE RIVER-HEMPSTEAD-NEVADA-MILLER-LAFAYETTE-
MCCURTAIN-RED RIVER-BOWIE-
INCLUDING THE CITIES OF...DE QUEEN...NASHVILLE...ASHDOWN...HOPE...
PRESCOTT...TEXARKANA...LEWISVILLE...IDABEL...CLARKSVILLE
920 PM CST TUE DEC 25 2012

...WINTER WEATHER ADVISORY IN EFFECT UNTIL 4 AM CST WEDNESDAY...
...WINTER STORM WARNING IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A WINTER
WEATHER ADVISORY FOR LIGHT TO MODERATE SNOWFALL AND IS IN EFFECT
UNTIL 4 AM CST WEDNESDAY. THE WINTER STORM WARNING HAS BEEN
CANCELLED.

* EVENT...A POWERFUL STORM SYSTEM WILL CONTINUE TO MOVE OVER THE
  FOUR STATE AREA TONIGHT...BRINGING ACCUMULATING SNOW TO PORTIONS
  OF SOUTHEAST OKLAHOMA...NORTHEAST TEXAS AND SOUTHWEST ARKANSAS.
  SNOWFALL ACCUMULATIONS OF ONE TO THREE INCHES WILL BE POSSIBLE
  ACROSS MUCH OF THE ADVISORY AREA THROUGH THE EARLY MORNING.

* TIMING...LIGHT TO MODERATE SNOWFALL WILL CONTINUE THIS EVENING
  AND INTO PORTIONS OF THE OVERNIGHT.

* IMPACT...ADDITIONAL ROADWAYS MAY BECOME HAZARDOUS DUE TO SNOW
  ACCUMULATIONS AND LOWER VISIBILITY. IN ADDITION...ICE WILL FORM
  AS RAIN WATER...MELTED AND SLUSHY SNOW REFREEZE OVERNIGHT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW
WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW
COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE
DRIVING...ESPECIALLY OVER BRIDGES AND OVERPASSES.

&&

$$

ARZ072-073-TXZ108>112-124>126-136>138-261000-
/O.CON.KSHV.WW.Y.0002.000000T0000Z-121226T1000Z/
COLUMBIA-UNION AR-FRANKLIN-TITUS-CAMP-MORRIS-CASS-WOOD-UPSHUR-
MARION-SMITH-GREGG-HARRISON-
INCLUDING THE CITIES OF...MAGNOLIA...EL DORADO...MT VERNON...
MT PLEASANT...PITTSBURG...DAINGERFIELD...ATLANTA...QUITMAN...
GILMER...JEFFERSON...TYLER...LONGVIEW...MARSHALL
920 PM CST TUE DEC 25 2012

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 AM CST
WEDNESDAY...

* EVENT...A POWERFUL STORM SYSTEM WILL CONTINUE TO MOVE OVER THE
  FOUR STATE AREA OVERNIGHT...BRINGING ADDITIONAL ACCUMULATING
  SNOW TO PORTIONS OF NORTHEAST TEXAS AND SOUTHWEST ARKANSAS.
  SNOWFALL ACCUMULATIONS OF ONE TO THREE INCHES WILL BE POSSIBLE
  ACROSS THE ADVISORY AREA THROUGH TONIGHT. SNOW BANDS HAVE SET UP
  OVER EXTREME NORTHEAST TEXAS AND EXTEND FROM NORTH TO SOUTH ON
  THE BACKSIDE OF THE UPPER LOW. 

* TIMING...LIGHT TO MODERATE SNOW WILL CONTINUE THIS EVENING AND 
  INTO THE OVERNIGHT HOURS.

* IMPACT...ROADWAYS MAY BECOME HAZARDOUS DUE TO SNOW ACCUMULATIONS
  AND LOWER VISIBILITY. IN ADDITION...ICE WILL FORM AS RAIN
  WATER...MELTED AND SLUSHY SNOW REFREEZE OVERNIGHT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW
WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW
COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE
DRIVING...ESPECIALLY OVER BRIDGES AND OVERPASSES.

&&

$$

24

What forecasters said that day

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

NWS Shreveport, LA wrote its last area forecast discussion before this winter storm warning went out at Dec 24, 10:19 PM CST, 4 hours 11 minutes earlier.

Area forecast discussion, Dec 24, 10:19 PM CST, 4 hours 11 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SHREVEPORT LA
1019 PM CST MON DEC 24 2012

.DISCUSSION.
CURRENT READINGS ARE COOLER THAN EXPECTED IN MANY LOCALES AND
WE HAVE UPDATED THE OVERNIGHT LOWS WHICH WILL LIKELY OCCUR IN THE
WEE HOURS. SOME ADDITIONAL DROP MAY OCCUR WITH ONSET OF PRECIP AS
SPREADS ARE QUITE LARGE AREA WIDE. PLENTY OF SHOWERS OVER THE GULF
AND WILL BE WORKING INLAND BY MIDNIGHT. ALSO...OVER RUNNING
DEVELOPMENT WILL BEGIN SOON...HAVE ADJUSTED POPS A BIT FOR THE
OVERNIGHT...TO OUR SW AS THE VORT OVER WEST TEXAS MOVES EASTWARD
OVERNIGHT. THE UPPER LOW HAS NOT BOTTOMED OUT AND CONTINUES
DIGGING AND HAS PROMPTED ADDITIONAL COUNTIES IN THE WINTER WEATHER
ADVISORY FOR CHRISTMAS AFTERNOON AND EXPANDED THE WINTER STORM
WATCH A ROW FARTHER SOUTH IN ARKANSAS.

OF COURSE...NEW DATA IS ARRIVING ALL THE TIME NOW AND ADDITIONAL
CHANGES MAY OCCUR DURING THE OVERNIGHT AND ISSUED AS USUAL IN THE
4 AM PACKAGE. THE SEVERE THREAT WILL BEGIN PRIOR TO DAYBREAK SW AS
SOME HAILERS WITH A TORNADIC THREAT GENERALLY SOUTH OF I-20 ON
CHRISTMAS DAY...AS MID TO LATE MORNING HEATING OF THE LOWER ATMOSPHERE
OCCURS. THE CLOUDS WILL BE THICK...BUT THE SUN WILL STILL GET IN
BETWEEN. SPC/S OUTLOOKS REMAIN MUCH THE SAME WITH A SLIGHT IN EFFECT
FOR THE OVERNIGHT OVER OUR SW CORNER AND THEN DAY 2...A MODERATE
OVER OUR SE CORNER BY 12Z FOR THE NEXT 24 HRS. /24/

&&

.AVIATION...
MOSTLY VFR FLIGHT CATEGORIES WILL PREVAIL INTO THE HOURS JUST AFTER
MIDNIGHT BUT LATER DURING THE CHRISTMAS MORNING HOURS BETWEEN 25/08
UTC TO 25/12 UTC MVFR CEILINGS BEGIN DEVELOPING AND SPREADING OVER
THE AREA AND LOWER TO IFR CEILINGS/VISIBILITIES IN MIST/BR. RAIN AND
AND SCATTERED CONVECTION WILL BECOME WIDESPREAD AROUND AND AFTER
25/12 UTC. A SURFACE LOW WILL BE MOVING ACROSS THE FOUR STATE REGION
DURING THE DAY WITH A WARM FRONT TO THE EAST AND COLD FRONT TO THE
SOUTHWEST. STRONG AND GUSTY WINDS WILL BE 15 TO 25 KNOTS AS PRESSURE
GRADIENT INCREASES FOR MUCH OF EAST TEXAS AND NORTHWEST AND NORTH
CENTRAL LOUISIANA AND SOUTH CENTRAL ARKANSAS. /06/

&&

.PREV DISCUSSION... /ISSUED 422 PM CST MON DEC 24 2012/

DISCUSSION...
LOTS TO TALK ABOUT THIS AFTERNOON. ALREADY BEGINNING TO SEE CIRRUS
THICKEN AND INCREASE FROM THE W ACROSS N TX/OK...AHEAD OF A WELL
DEFINE LONGWAVE TROUGH THAT IS CARVING THROUGH THE GREAT BASIN TO
NEAR THE FOUR CORNERS REGION. MEANWHILE...OUR SFC BNDRY HAS BECOME
NEARLY STATIONARY ALONG THE I-10 CORRIDOR OF SE TX/S LA...WHICH
MATCHES UP WELL WITH WHAT THE GFS HAS BEEN ADVERTISING THE LAST
COUPLE OF DAYS. THE WRF HAS TRENDED A LITTLE FARTHER S THAN
YESTERDAY WITH THE CENTER OF THE DEVELOPING CLOSED LOW CHRISTMAS
DAY AS IT TRACKS THROUGH THE TX PANHANDLE CHRISTMAS MORNING...AND
ALONG THE RED RIVER VALLEY OF SRN OK/N TX DURING THE DAY.
HOWEVER...THIS MODEL IS THE SLOWEST TODAY...WITH VERY GOOD
AGREEMENT AMONGST THE GFS/CANADIAN/ECMWF WITH THE CLOSED LOW
POSITION CENTERED NEAR TXK BY 00Z WEDNESDAY. THUS...HAVE BASED THE
FORECAST PACKAGE SIMILAR TO THE CON CENSUS HERE...WITH LARGE SCALE
FORCING QUICKLY INCREASING AFTER 06Z TONIGHT ACROSS CNTRL/ECNTRL
TX...WITH A 30-40KT SWRLY LLJ DEVELOPING ATOP THE SFC BNDRY TO OUR
S RESULTING IN RAPIDLY INCREASING ELEVATED CONVECTION WITHIN THE
LEFT EXIT REGION OF A 120KT JET. THE SHORT TERM PROGS MAINTAIN
STEEP 700-500MB LAPSE RATES NEAR AND N OF THE BNDRY ACROSS E TX/N
LA...SUCH THAT THERE COULD BE AN ISOLATED SVR THREAT OVER THESE
AREAS LATE...WITH HAIL BEING THE PRIMARY THREAT. HAVE INCREASED
POPS TO LIKELY/CATEGORICAL AREAWIDE AND MAINTAINED SVR MENTION
ACROSS DEEP E TX/SRN SECTIONS OF NCNTRL LA.

CONVECTION WILL BE WIDESPREAD BY 12Z CHRISTMAS DAY...WITH THE SVR
THREAT PERSISTING MAINLY ACROSS LOWER E TX/SRN SECTIONS OF NCNTRL
LA S OF I-20. AS THE COLD CORE SYSTEM BEGINS TO CLOSE OFF BY
MIDDAY TUESDAY...IT BEGINS TO TAKE ON A NEGATIVE TILT BY
AFTERNOON...WITH SFC CYCLOGENESIS RAPIDLY INCREASING ALONG THE
WARM FRONTAL BNDRY ACROSS NCNTRL LA DURING THE AFTERNOON/EVENING.
DEEP LAYER SHEAR VALUES INCREASE TO 55-65KTS NEAR THE WARM
SECTOR...ALTHOUGH SFC BASED INSTABILITY WILL MAY BE IN QUESTION
ACROSS OUR SRN ZONES AS RAIN COOLED AIR TO THE N OF THE WARM FRONT
MAY INHIBIT THE NWD PROGRESSION OF THE FRONT. SHOULD THIS
OCCUR...THIS WOULD MAINTAIN A LOW LEVEL INVERSION JUST OFF THE SFC
AND INHIBIT THE STRONGER WINDS ALOFT FROM REACHING THE
SFC...ALTHOUGH THE THREAT FOR ELEVATED HAILERS WILL STILL BE
POSSIBLE. HOWEVER...STEEP LAPSE RATES WITHIN A STRONGLY SHEARED
ENVIRONMENT WITHIN THE LEFT EXIT REGION OF THE PRIMARY UPPER JET
ROUNDING THE BASE OF THE LOW WILL INVIGORATE STRONG/SVR CONVECTION
WITHIN THE WARM SECTOR FROM LATE MORNING TO AT LEAST MID
AFTERNOON...WITH DAMAGING WINDS/LARGE HAIL/ISOLATED TORNADOES ALL
POSSIBLE. THE SVR THREAT SHOULD WIND DOWN BY 00Z
WEDNESDAY...ALTHOUGH OUR FOCUS WILL TURN TO OUR NW LATE CHRISTMAS
AFTERNOON/EVENING AS THE COLDER SUBFREEZING AIR DEEPENS OVER
EXTREME NE TX/SE OK/SW AR.

GIVEN THE GOOD CONSENSUS WITH THE CLOSED LOW POSITION NEAR TXK BY
00Z WEDNESDAY...THE INITIALLY SHALLOW SUBFREEZING AIR MASS OVER SE
OK WILL RAPIDLY DEEPEN...WITH 850MB TEMPS FALLING SOME 6-8C
BETWEEN 18Z TUESDAY AND 00Z WEDNESDAY AS IT BEGINS TO SURGE SE
WITH THE NE EJECTION OF THE SFC LOW OVER NCNTRL LA. THUS...THE
CHANGEOVER FROM RAIN TO SNOW SHOULD BE QUICK TO OCCUR...AS
WRAP-AROUND SNOW ON THE W SIDE OF THE 700MB LOW SHIFTS E ACROSS SE
OK/SW AR. SINCE CONFIDENCE HAS INCREASED IN THE TRACK OF THE
CLOSED LOW...ALBEIT A BIT SLOWER...HAVE ISSUED A WINTER WEATHER
ADVISORY FOR MCCURTAIN COUNTY AS WELL AS LITTLE RIVER/SEVIER/HOWARD
COUNTIES FOR 21Z-06Z AS THE PRECIP BEGINS TO CHANGE OVER. WILL
ALLOW THE WINTER STORM WATCH TO REMAIN IN EFFECT FOR
HEMPSTEAD/NEVADA COUNTIES TUESDAY EVENING...WITH THE WATCH PUSHED
BACK A FEW HOURS GIVEN THE SLOWER PROGRESSION OF THE SUBFREEZING
TEMPS.

AT THIS TIME...CURRENT SNOWFALL ACCUMULATIONS SHOULD RANGE FROM
1-3 INCHES OVER MCCURTAIN COUNTY AS WELL AS AREAS NW OF AN
ASHDOWN...TO NASHVILLE AR LINE. DRY SLOTTING S OF THE CLOSED LOW
WILL QUICKLY TAPER ANY SNOWFALL ACCUMULATIONS FARTHER S OF THE RED
RIVER INTO NE TX...AS WELL AS THE I-30 CORRIDOR OF SW AR. SHOULD
THE TRACK OF THE LOW BE A LITTLE FARTHER S THAN CURRENTLY
PROGGED...SNOWFALL ACCUMULATIONS WILL INCREASE FARTHER S ACROSS NE
TX/SE OK/SW AR. THIS WOULD LIKELY RESULT IN A WINTER STORM WARNING
BEING NEEDED FOR SE OK/POSSIBLY ADJACENT SECTIONS OF SW AR.
SNOWFALL RATES SHOULD DIMINISH AFTER 06Z WEDNESDAY AS THE CLOSED
LOW EJECTS NE INTO THE MID-SOUTH...WITH GRADUAL CLEARING EXPECTED
WEDNESDAY MORNING. WITH THE DEEPENING SFC LOW OVER NCNTRL LA LATE
CHRISTMAS AFTERNOON...THE PRESSURE GRADIENT WILL TIGHTEN AS
WELL...RESULTING IN GUSTY NW WINDS WITH THE STRONG COLD ADVECTION.
THESE GUSTY WINDS MAY CONRIBUTE TO SPORATIC POWER OUTAGES GIVEN
THE WEAK LIMBS AFTER LAST WEEK/S WINDSTORM...IN ADDITION TO ANY
SNOW THAT ACCUMULATES ON THE ELEVATED SURFACES.

THE SNOWPACK TO OUR NW WILL RESULT IN MUCH BELOW NORMAL TEMPS
WEDNESDAY...BEFORE A GRADUAL WARMING TREND COMMENCES BY THURSDAY
ONCE THE CANADIAN SFC RIDGE SHIFTS E OF THE REGION. A SWRLY LOW
LEVEL RETURN FLOW COMMENCES THURSDAY AFTERNOON AND FRIDAY...AHEAD
OF THE NEXT SHORTWAVE THAT WILL CARVE INTO THE SRN PLAINS LATE
FRIDAY. WILL MAINTAIN CHANCE POPS AREAWIDE FRIDAY/FRIDAY
EVENING...ALTHOUGH THE PROGS HAVE SLOWED THIS SYSTEM DOWN A TAD
TODAY.

LITTLE CHANGES MADE TO THE REMAINDER OF THE GRIDS GIVEN THE
CHRISTMAS DAY STORM.

PRELIMS TO FOLLOW BELOW...

15

AVIATION...
DRIER AIR WILL PROVIDE VFR FLIGHT CONDITIONS ACROSS THE FOUR STATE
THROUGHOUT THE EVENING HOURS. AFTER 06Z...CIGS WILL BEGIN TO LOWER
ALONG WITH THE DEVELOPMENT OF SCATTERED CONVECTION. CONVECTION WILL
BECOME WIDESPREAD AFTER 09Z...WITH MOST OF THE AREA BECOMING MVFR BY
12Z ALONG WITH AREAS OF IFR DUE TO RAIN...FOG AND LOW CIGS.
TURBULENCE WILL BE MODERATE TO SEVERE...ESPECIALLY ABOVE 5 KFT AND
SOUTH OF A ELD...TYR LINE DUE TO EMBEDDED TSTMS. THESE CONDITIONS TO
CONTINUE UNTIL 18Z TUESDAY.  AFTER 18Z A COLD FRONT WILL MOVE INTO
EAST TEXAS AND SOUTHEAST OKLAHOMA WITH CONDITIONS TEMPORARILY
IMPROVING TO VFR FROM WEST TO EAST ACROSS EAST TEXAS. CIGS AND VSBYS
WILL LOWER TO IFR BEHIND THE FRONT IN SOUTHEAST OKLAHOMA DUE TO SNOW
AND FOG AFTER 21Z. THESE LOWER CONDITIONS WILL SPREAD SOUTH INTO
ADJACENT NORTHEAST TEXAS BY 26/00Z AND INTO SOUTHWEST ARKANSAS AFTER
26/00Z.  /14/

&&

.PRELIMINARY POINT TEMPS/POPS...
SHV  46  54  30  43  26 /  40 100  40  10   0
MLU  49  58  35  46  26 /  40 100  50  10   0
DEQ  38  42  23  37  20 /  40 100  70  10   0
TXK  44  45  27  39  23 /  40 100  60  10   0
ELD  45  48  30  41  24 /  40 100  60  10   0
TYR  44  51  26  40  24 /  60 100  30  10   0
GGG  44  52  28  41  25 /  60 100  30  10   0
LFK  47  69  30  45  27 /  80 100  10  10   0

&&

.SHV WATCHES/WARNINGS/ADVISORIES...
AR...WINTER WEATHER ADVISORY FROM 3 PM TUESDAY TO MIDNIGHT CST
     TUESDAY NIGHT FOR THE FOLLOWING ZONES: ARZ050-051-059-070.

     WINTER STORM WATCH TUESDAY EVENING FOR THE FOLLOWING ZONES:
     ARZ060-061-071-072.

LA...NONE.
OK...WINTER WEATHER ADVISORY FROM 3 PM TUESDAY TO MIDNIGHT CST
     TUESDAY NIGHT FOR THE FOLLOWING ZONES: OKZ077.

TX...WINTER WEATHER ADVISORY FROM 3 PM TUESDAY TO MIDNIGHT CST
     TUESDAY NIGHT FOR THE FOLLOWING ZONES: TXZ096-097-108>112.

&&

24/06
Hazardous weather outlook, Dec 24, 11:38 PM CST, 2 hours 52 minutes before
HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE SHREVEPORT LA
1138 PM CST MON DEC 24 2012

ARZ050-051-059>061-OKZ077-251200-
SEVIER-HOWARD-LITTLE RIVER-HEMPSTEAD-NEVADA-MCCURTAIN-
1138 PM CST MON DEC 24 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWEST
ARKANSAS...NORTHEAST TEXAS AND FOR SOUTHEAST OKLAHOMA.

.DAY ONE...TONIGHT...

SCATTERED SHOWERS AND A FEW EMBEDDED THUNDERSTORMS WILL DEVELOP AND
INCREASE ACROSS THE I-30 CORRIDOR AFTER MIDNIGHT. HOWEVER...NO
HAZARDOUS WEATHER IS EXPECTED.

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

A STRONG UPPER LEVEL STORM SYSTEM WILL DEVELOP AND MOVE ALONG THE
RED RIVER VALLEY OF NORTH TEXAS AND SOUTHERN OKLAHOMA CHRISTMAS
DAY...WHICH WILL RESULT IN A COLD WIDESPREAD RAIN AND EMBEDDED
THUNDERSTORMS ACROSS THE AREA. IN ADDITION...AS THE COLD AIR BEGINS
TO DEEPEN LATE ON CHRISTMAS DAY AND EVENING NEAR THE COLD CORE
CENTER OF THIS SYSTEM. THE RAINFALL WILL GRADUALLY CHANGE OVER TO
SNOW LATE CHRISTMAS AFTERNOON OVER SOUTHEAST OKLAHOMA...NORTHEAST
TEXAS AND PORTIONS OF SOUTHWEST ARKANSAS DURING THE EVENING. AT THIS
TIME...SNOWFALL ACCUMULATIONS OF TWO TO FOUR INCHES WILL BE
POSSIBLE...MAINLY NORTH OF AN IDABEL OKLAHOMA...TO
ASHDOWN...HOPE...AND PRESCOTT ARKANSAS LINE. AS TEMPERATURES FALL TO
AND BELOW FREEZING DURING THIS TIME...SOME SNOW MAY ACCUMULATE ON
BRIDGES AND OVERPASSES...TREES AND POWER LINES. NORTHWEST WINDS WILL
INCREASE CHRISTMAS NIGHT ACROSS THE AREA...WHICH MAY RESULT IN
WEAKER TREES AND TREE LIMBS TO FALLING ONTO POWER LINES...RESULTING IN
SPORADIC POWER OUTAGES. THE SNOWFALL WILL DIMINISH BY DAYBREAK ON
WEDNESDAY.

.SPOTTER INFORMATION STATEMENT...

ACTIVATION OF EMERGENCY MANAGEMENT PERSONNEL...AMATEUR RADIO
OPERATORS...AND STORM SPOTTERS WILL NOT BE NEEDED OVERNIGHT.

ARZ070>073-TXZ096-097-108>112-124-251200-
MILLER-LAFAYETTE-COLUMBIA-UNION AR-RED RIVER-BOWIE-FRANKLIN-TITUS-
CAMP-MORRIS-CASS-WOOD-
1138 PM CST MON DEC 24 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTH CENTRAL
ARKANSAS...SOUTHWEST ARKANSAS AND NORTHEAST TEXAS.

.DAY ONE...THIS AFTERNOON AND TONIGHT...

SCATTERED SHOWERS AND A FEW EMBEDDED THUNDERSTORMS WILL DEVELOP AND
INCREASE ACROSS EXTREME NORTHEAST TEXAS AND SOUTHWEST ARKANSAS
AFTER MIDNIGHT. HOWEVER...NO HAZARDOUS WEATHER IS EXPECTED.

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

A STRONG UPPER LEVEL STORM SYSTEM WILL DEVELOP AND MOVE ALONG THE
RED RIVER VALLEY OF NORTH TEXAS AND SOUTHERN OKLAHOMA CHRISTMAS
DAY...WHICH WILL RESULT IN WIDESPREAD RAIN AND EMBEDDED
THUNDERSTORMS ACROSS THE AREA. HOWEVER...AS THE COLD AIR BEGINS TO
DEEPEN TUESDAY AFTERNOON AND EVENING NEAR THE COLD CORE CENTER OF
THIS SYSTEM ALONG THE RED RIVER...TEMPERATURES WILL QUICKLY FALL
DURING THE LATE AFTERNOON AND EVENING. THE RAIN AND EMBEDDED
THUNDERSTORMS WILL DIMINISH FROM THE WEST CHRISTMAS AFTERNOON AND
EVENING...BUT A LIGHT RAIN AND SNOW MIX WILL WRAP AROUND THE
BACKSIDE OF THIS SYSTEM AS IT PROGRESSES EAST OVER THE AREA
CHRISTMAS NIGHT. SOME LIGHT SNOW ACCUMULATIONS WILL BE
POSSIBLE...FROM AN INCH...TO ONLY A DUSTING OF SNOW EXPECTED. ANY
STANDING WATER OR SNOW LEFTOVER ON ELEVATED SURFACES SUCH AS BRIDGES
AND OVERPASSES MAY CONTAIN PATCHY ICE AS TEMPERATURES FALL BELOW
FREEZING CHRISTMAS NIGHT AND EARLY WEDNESDAY MORNING.

.SPOTTER INFORMATION STATEMENT...

ACTIVATION OF EMERGENCY MANAGEMENT PERSONNEL...AMATEUR RADIO
OPERATORS...AND STORM SPOTTERS WILL NOT BE NEEDED OVERNIGHT.

LAZ001>006-010>014-017>022-TXZ125-126-136>138-149>153-165>167-
251200-
CADDO-BOSSIER-WEBSTER-CLAIBORNE-LINCOLN-UNION LA-DE SOTO-
RED RIVER-BIENVILLE-JACKSON-OUACHITA-SABINE LA-NATCHITOCHES-WINN-
GRANT-CALDWELL-LA SALLE-UPSHUR-MARION-SMITH-GREGG-HARRISON-
CHEROKEE-RUSK-PANOLA-NACOGDOCHES-SHELBY-ANGELINA-SAN AUGUSTINE-
SABINE TX-
1138 PM CST MON DEC 24 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHWEST AND NORTH CENTRAL
LOUISIANA AND FOR DEEP EAST TEXAS AND PORTIONS OF NORTHEAST TEXAS.

.DAY ONE...TONIGHT...

SCATTERED TO NUMEROUS SHOWERS AND THUNDERSTORMS WILL RAPIDLY
INCREASE ACROSS DEEP EAST TEXAS AND NORTH LOUISIANA AFTER
MIDNIGHT...AHEAD OF AN UPPER LEVEL DISTURBANCE THAT WILL EJECT
NORTHEAST ACROSS THE AREA. THESE STORMS WILL DEVELOP MAINLY ALONG
AND NORTH OF A WARM FRONT THAT WILL BEGIN TO LIFT NORTHWARD FROM
SOUTHEAST TEXAS AND SOUTHERN LOUISIANA. THESE STORMS WILL LIKELY BE
ELEVATED IN NATURE...ALTHOUGH ISOLATED SEVERE THUNDERSTORMS WILL BE
POSSIBLE...WITH LARGE HAIL THE PRIMARY THREAT.

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

A STRONG UPPER LEVEL STORM SYSTEM WILL MOVE ALONG THE RED RIVER
VALLEY OF NORTH TEXAS AND SOUTHERN OKLAHOMA CHRISTMAS DAY...WHICH
WILL RESULT IN WIDESPREAD SHOWERS AND THUNDERSTORMS ACROSS THE AREA.
THE WARM FRONT WILL LIFT INTO THE I-20 CORRIDOR ON CHRISTMAS
DAY...WITH WARM UNSTABLE AIR SOUTH OF THE FRONT CONTRIBUTING TO
GREATER LOW LEVEL INSTABILITY AS LARGE SCALE FORCING INCREASES.
STRONG SHEAR AND INSTABILITY WILL BRIEFLY LIFT INTO THE REGION
DURING THE LATE MORNING AND EARLY AFTERNOON HOURS. SCATTERED STRONG
TO SEVERE THUNDERSTORMS...CAPABLE OF PRODUCING STRONG DAMAGING
WINDS...LARGE HAIL...ISOLATED TORNADOES...AND LOCALLY HEAVY RAINFALL
WILL BE POSSIBLE. AN ISOLATED LARGE HAIL OR DAMAGING WIND THREAT WILL EXIST
ALONG THE INTERSTATE 20 CORRIDOR OF EAST TEXAS AND NORTH LOUISIANA
JUST NORTH OF THE WARM FRONT...WITH THE SEVERE WEATHER THREAT
DIMINISHING ACROSS ALL AREAS DURING THE LATE AFTERNOON.

.SPOTTER INFORMATION STATEMENT...

ACTIVATION OF EMERGENCY MANAGEMENT PERSONNEL...AMATEUR RADIO
OPERATORS AND STORM SPOTTERS MAY BE NEEDED OVERNIGHT ACROSS DEEP
EAST TEXAS AND NORTH CENTRAL LOUISIANA.

24

The office that day

Everything else NWS Shreveport, LA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Dec 25, 1:39 AM CSTLake Wind AdvisorySHVColumbia, Hempstead, Howard, Lafayette, Little River, Miller and 3 more28 hr
Dec 25, 5:04 AM CSTSevere Thunderstorm WarningSHVLittle River41 min
Dec 25, 3:21 AM CSTSevere Thunderstorm WarningSHVCherokee, Nacogdoches, Panola, Rusk, Smith42 min
Dec 25, 9:42 AM CSTTornado WarningSHVAngelina, Cherokee18 min
Dec 25, 10:12 AM CSTSevere Thunderstorm WarningSHVAngelina, Nacogdoches33 min
Dec 25, 10:37 AM CSTSevere Thunderstorm WarningSHVAngelina, Nacogdoches, San Augustine, Shelby38 min
Dec 25, 11:00 AM CSTSevere Thunderstorm WarningSHVSabine45 min

Nearby

Winter Storm Warnings in Arkansas, 2012Winter Storm Warnings in Texas, 2012Winter Storm Warnings in Oklahoma, 2012Every winter storm warning 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.