Tag Archives: STORM

NEW: Rio Grande Valley UPGRADED to Winter Storm Warning!

The National Weather Service in Brownsville has upgraded much of the Rio Grande Valley to a WINTER STORM WARNING until 11 AM on Wednesday. This is based on trends suggesting accumulations of freezing rain along with sleet will be more significant than previously thought. Ice accumulations of up to a quarter of an inch along with sleet accumulations up to one inch will be possible in the warning area. This is a rare, possibly historic event for the RGV considering that winter weather is nearly unheard of. Travel issues are probable this morning and should be avoided until this event passes. A Winter Weather Advisory is in effect just north of the warning area. As colder air drifts into the region some areas may switch over to all snow and receive snow accumulations over 1 inch.

2014-01-28_23-34-23

..WINTER STORM WARNING IN EFFECT UNTIL 8 AM CST WEDNESDAY…
…WIND CHILL ADVISORY REMAINS IN EFFECT UNTIL 11 AM CST
WEDNESDAY…

THE NATIONAL WEATHER SERVICE IN BROWNSVILLE HAS ISSUED A WINTER
STORM WARNING FOR FREEZING RAIN AND SLEET…WHICH IS IN EFFECT
UNTIL 8 AM CST WEDNESDAY. THE WINTER WEATHER ADVISORY IS NO
LONGER IN EFFECT.

* EVENT…STRONG COLD ARCTIC AIR BRINGING BELOW FREEZING
TEMPERATURES TONIGHT IN COMBINATION WITH A DISTURBANCE OVER
MEXICO WILL DEVELOP THE POTENTIAL FOR A MIX OF FREEZING RAIN AND
SLEET ACROSS DEEP SOUTH TEXAS. ICE ACCRETION OVER ONE EIGHT OF
AN INCH AND SLEET ACCUMULATION TO ONE HALF TO THREE QUARTERS OF
AN INCH ARE EXPECTED.

* WIND CHILL VALUES…23 TO 26 ACROSS THE RIO GRANDE RANCH LANDS
AND 25 TO 28 ACROSS THE RIO GRANDE VALLEY.

* TIMING…NOW THROUGH EARLY WEDNESDAY MORNING.

* IMPACT…TRAVEL IN MANY AREAS ACROSS THE RIO GRANDE VALLEY WILL
BE SIGNFICANTLY IMPACTED…ESPECIALLY ON BRIDGES AND OVERPASSES
WITH SLICK SPOTS FORMING. HYPOTHERMIA COULD DEVELOP QUICKLY IN
PERSONS AND ANIMALS THAT ARE WITHOUT ADEQUATE SHELTER. THOSE
OUTDOORS FOR EXTENDED PERIODS OF TIME SHOULD BE ADEQUATELY
DRESSED IN MULTIPLE LAYERS.

PRECAUTIONARY/PREPAREDNESS ACTIONS…

PRECAUTIONARY/PREPAREDNESS ACTIONS…

A WINTER STORM WARNING IS ISSUED WHEN DANGEROUS WINTER WEATHER IS
IMMINENT. SNOW ACCUMULATIONS OF AT LEAST ONE INCH ON ROADS OR
WALKWAYS…AT LEAST ONE HALF INCH OF SLEET ACCUMULATION…OR ICE
ACCRETION OF ONE EIGHTH INCH OR MORE ON EXPOSED SURFACES.
HAZARDOUS DRIVING CONDITIONS WILL RESULT. PERSONS WITH TRAVEL
PLANS IN THE WARNING AREA ARE STRONGLY ENCOURAGED TO POSTPONE
THEM UNTIL CONDITIONS IMPROVE.

A WIND CHILL ADVISORY IS ISSUED WHEN WIND CHILL INDEX VALUES WILL
DROP TO 30 OR LOWER FOR AT LEAST 2 HOURS FOR THE RIO GRANDE
VALLEY AND 25 DEGREES OR LOWER FOR 2 OR MORE HOURS FOR THE RIO
GRANDE PLAINS AND NORTHERN RANCHLANDS…WITH WINDS OF 10 MPH OR
GREATER.

3:30 PM – Winter Storm Warnings/Advisories Issued for Tuesday

* WINTER STORM WARNING for Central Portions of Southeast Texas – College Station, Bryan, Huntsville, Conroe, Houston, Rosenburg, Angleton, League City, and Dayton are a few cities included. This warning runs from 3 AM Tuesday to 6 PM on Tuesday. Up to 1 inch of snow and 0.10″ of ice will be possible. With very cold road surfaces travel impacts are probable especially on bridges/overpasses.

* WINTER WEATHER/TRAVEL ADVISORY for the Hill Country, South-Central Texas, along with parts of East Texas – Rocksprings, Uvalde, Fredericksburg, Burnet, Georgetown, Austin, Sna Marcos, San Antonio, Seguin, Karnes City, Cuero, Waelder, Hallettsville, Bellville, Bay City, Madisonville, Crockett, Rusk, Nacogdoches, Lufkin, and Center are a few cities included. A light glaze of ice along with a dusting of snow will be possible. Some bridges and overpasses will likely have icy spots and some travel disruptions will be possible.

2014-01-27_15-03-58

It’s only been a few days since our last winter weather event across Texas and yet we’re dealing with another possible day of winter weather. If you have stepped outside today you already know that we have cold air in place. The brutal north winds have wind chill values nearly twenty degrees below the actual air temperature. An upper level disturbance (shortwave) will begin taking shape over South and Southeast Texas on Tuesday. The result will be an increasing chance for light freezing rain, sleet and may a few snow flakes. A few days ago it looked like we could have a more significant winter storm but weather models have come in drier. Our neighbors to the east won’t be so lucky as a severe winter storm looks to impact coastal parts of LA/MS/AL into the eastern seaboard. While some changes are likely as we head into tonight here is what I think based on the current data. Most areas under the advisory/warning could receive a glaze to perhaps a tenth of an inch of ice accumulation. That will be enough to cause issues on elevated surfaces along with some surface roads. We could see some sleet/snow accumulations up to an inch with localized areas getting up to 1.5″-2″. Because we already have cold air in place our infrastructure is going to be cooler than the last event. It won’t take much to cause travel headaches. Here is a graphic from the 4 kilometer high resolution North American Model showing generally light accumulations. Don’t take the actual locations of accumulations to heart. We’ll have a forecast update later this evening.

hires_ptype_acc_houston_10

Severe Thunderstorm Watch – South Central Texas until 3pm CST

Severe Watch

The National Weather Service in Austin/San Antonio has placed the following counties under a Severe Thunderstorm Watch until 3pm this afternoon:  Atasosa, Bastrop, Caldwell, DeWitt, Fayette, Gonzales, Guadalupe, Karnes, Lavaca, Lee and Wilson. 

A line of strong thunderstorms has developed along and east of I-35 between Austin and San Antonio and south towards Atascosa this morning, with one Severe Warned storm just to the south of San Antonio in Atascosa county at the time of this post. Additional thunderstorm development is expected over the next several hours.  A few of the stronger storms that develop across this region have the potential to produce a tornado or two, although high winds and large hail up to 1 inch in diameter are the greatest threats.  Folks in this region need to keep a weather eye out today and be prepared to take immediate shelter should a warning be issued.  Have a means of receiving weather warnings and stay tuned to local media outlets for the latest updates.

URGENT – IMMEDIATE BROADCAST REQUESTED

   NWS STORM PREDICTION CENTER NORMAN OK
   1025 AM CST SAT DEC 21 2013

   THE NWS STORM PREDICTION CENTER HAS ISSUED A

   * SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
     SOUTH CENTRAL TEXAS
     COASTAL WATERS

   * EFFECTIVE THIS SATURDAY MORNING AND AFTERNOON FROM 1025 AM
     UNTIL 300 PM CST.

   * PRIMARY THREATS INCLUDE...
     SEVERAL DAMAGING WIND GUSTS TO 70 MPH POSSIBLE
     A FEW LARGE HAIL EVENTS TO 1 INCH IN DIAMETER POSSIBLE
     A FEW TORNADOES POSSIBLE

   THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 55
   STATUTE MILES EAST AND WEST OF A LINE FROM 40 MILES EAST OF NEW
   BRAUNFELS TEXAS TO 45 MILES WEST SOUTHWEST OF BEEVILLE TEXAS.

   PRECAUTIONARY/PREPAREDNESS ACTIONS...

   REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
   FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH
   AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR
   THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS
   AND POSSIBLE WARNINGS. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY
   DO PRODUCE TORNADOES.

 

 

Tornado Watch – Eastern/Southeastern Texas until 6pm CST

Tornado Watch 6pm

 

A large portion of southeastern and eastern Texas has been placed under a TORNADO WATCH until 6pm this evening.  A tornado Watch means that conditions are favorable for tornados to develop within any of the stronger storm cells that develop throughout this morning and into the afternoon hours.  The locations most favored for severe storm development this afternoon will be northeast of a line from College Station, to Houston and Galveston.  Have a means of receiving Weather Warnings…including smartphone weather apps, NOAA Weather Radio and your local media.  Be alert to any approaching severe weather in your area. These storms will be traveling very quickly, so if a Warning is issued for your area, be prepared to take shelter immediately.  As a reminder, the best place to shelter is in an interior hallway, closet or bathroom with no windows, and cover your head with blankets, pillows or even a mattress if you can drag one in there.

URGENT - IMMEDIATE BROADCAST REQUESTED
   TORNADO WATCH NUMBER 580
   NWS STORM PREDICTION CENTER NORMAN OK
   950 AM CST SAT DEC 21 2013

   THE NWS STORM PREDICTION CENTER HAS ISSUED A

   * TORNADO WATCH FOR PORTIONS OF
     SOUTHERN ARKANSAS
     WESTERN AND CENTRAL LOUISIANA
     EASTERN TEXAS
     COASTAL WATERS

   * EFFECTIVE THIS SATURDAY MORNING AND EVENING FROM 950 AM UNTIL
     600 PM CST.

   * PRIMARY THREATS INCLUDE...
     SEVERAL INTENSE TORNADOES POSSIBLE
     SEVERAL DAMAGING WIND GUSTS TO 70 MPH POSSIBLE
     A FEW LARGE HAIL EVENTS TO 1 INCH IN DIAMETER POSSIBLE

   THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 90 STATUTE
   MILES EAST AND WEST OF A LINE FROM 5 MILES EAST SOUTHEAST OF
   ANGLETON TEXAS TO 40 MILES EAST NORTHEAST OF EL DORADO ARKANSAS.
   FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
   OUTLINE UPDATE (WOUS64 KWNS WOU0).

   PRECAUTIONARY/PREPAREDNESS ACTIONS...

   REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
   TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH
   AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR
   THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS
   AND POSSIBLE WARNINGS.

   &&

   DISCUSSION...THUNDERSTORMS ARE EXPECTED TO INTENSIFY TODAY WHILE
   MOVING RAPIDLY NORTHEAST ACROSS THE WATCH AREA.  WHILE THE
   ATMOSPHERE IS ONLY MARGINALLY UNSTABLE...THE PRESENCE OF VERY STRONG
   VERTICAL SHEAR AND INTENSIFYING LARGE-SCALE FORCING FOR ASCENT WILL
   PROMOTE EMBEDDED SUPERCELLS AND BOWING STRUCTURES CAPABLE OF
   TORNADOES --SOME POSSIBLY SIGNIFICANT-- AND CORRIDORS OF WIND
   DAMAGE.

 

5:45 AM Winter Storm Update & Timeline

LATEST WATCHES/WARNINGS

* WINTER STORM WARNING for parts of West-Central Texas, all of Northwest and North Texas and parts of the Hill Country. This includes Odessa, Midland, Lamesa, Big Spring, Snyder, Sweetwater, San Angelo, Abilene, Brownwood, Stephenville, Cleburne, Fort Worth, Dallas, Denton, McKinney, Sherman, Pairs, Canton, and Hillsboro. Dangerous travel conditions continue this morning and will continue throughout the day as temperatures remain very cold and below freezing. The D/FW Metroplex now has over 125,000 without power and this is going to continue to be a problem across the region. Even after the storm ends, there may be additional tree and powerline damage today and into Saturday.

* WINTER WEATHER ADVISORY for parts of the Permian Basin, West Texas, a small portion of South Texas, much of Central Texas, a small portion of Southeast Texas, and parts of East/Northeast Texas. Plainview, Levelland, Lubbock, Pecos, Acuna, Uvalde, Kerryville, San Antonio, New Braunfels, San Marcos, Austin, Round Rock, Killeen (Fort Hood), Waco, Corsicana, Athens, Palestine, Bryan, College Station, Brenham, Tyler, New Boston, and Texarkana are included. Travel conditions across West Texas remain difficult this morning with impacts remaining from Thursday’s storm. Any additional precipitation this morning will only make it worse, even though only minor sleet accumulations are expected. For other locations outside of West Texas, A Winter Weather Advisory means that a glazing of ice may occur on elevated surfaces. A few bridges could develop icy spots, but overall travel should not be too impacted.

12-6-2013 5-42-29 AM

The primary batch of freezing rain and sleet that has caused so many problems overnight extends from Abilene to Lampasas northwest to Jacksboro east to Sulphur Springs and north into Oklahoma. This band continues to move northeast and dump sleet and freezing rain over areas below freezing. Additional sleet accumulations up to 1.5 inches will be possible with some ice accumulations also possible as well. There are now over 140,000 customers without power in D/FW and enough tree damage to keep the chippers busy for weeks. Many towns are impacted outside the D/FW Metroplex and the full scope of that won’t become apparent until the daytime hours.

What I can tell you is that the band of precipitation should begin moving east of the D/FW Metroplex during the 8 to 9 AM time-frame. Even after precipitation stops falling the impacts will continue throughout the day with little melting expected due to temperature remaining below freezing. As such, additional tree damage and resultant power outages will likely occur. Compared to the February 2011 Winter Storm during superbowl week in North Texas, this event will have more tree damage. While you may not think ice is heavy it will certainly weigh down trees and powerlines. Based on scanner traffic I’ve been listening to that is happening in many locations.

The High Resolution Rapid Refresh has been doing a very good job with this event. Here is its projection of what the radar may look like around 9 AM. As you can see, most precipitation is moving east of the D/FW Metroplex with freezing rain and sleet continuing across the Red River counties of Northeast Texas and rain in areas that are above freezing.

hrr-9am

By 1 PM most of the heavy precipitation will be exiting Texas into Arkansas. There could be patches of light precipitation in the form of sleet or freezing drizzle in the eastern half of Texas where winter weather advisories are in effect. No significant travel impacts are expected, but a glazing of ice may form on a few trees. Here’s the HRRR’s simulated radar at 1 PM.

hrrr1pm

Otherwise, the main show will be over and our next concern will come into play. Temperatures will remain cold this afternoon across Texas. In areas that have received significant winter precipitation there could be record cold temperatures tonight. We’re going to take a look at morning model data, but there are some indications that some location in Northwest and North Texas could get down into the single digits tonight. If that were to happen with these widespread power outages than we would definitely have a problem. Either way, it’s going to be very cold tonight and we’ll have more on that later this morning.

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