955pm CT – Mon/3Mar2014
….. First a note regarding the difference in sleet and hail (which we may need to know
before the nights’ out…)
Sleet are essentially frozen rain drops falling through a more substantial layer of freezing
air aloft. In general, is 2/10ths of an inch or smaller.
Hail, on the other hand, is related to convection (thunderstorms) and is generally larger
than 2/10ths of an inch.. certainly anything larger than 1/4 inch is going to be hail.. especially
if you have signs of convection (lightning and thunder). Just as you can have thunderstorms
with surface colder air, you can have hail as well.
tk
….. NWS / SPC Mesoscale Discussion Issued for Area ….
See here for the text advisory.
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Here is the latest Winter Storm Warning info from NWS/Austin-San Antonio…
URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 857 PM CST MON MAR 3 2014 ...WINTRY WEATHER TONIGHT THROUGH NOON TUESDAY... .A COMBINATION OF A SHALLOW ARCTIC AIRMASS...MOIST GULF FLOW AT LOWER LEVELS...AND A TROUGH AT THE UPPER LEVELS WILL BRING A CHANCE OF FREEZING RAIN AND SLEET TO SOUTH CENTRAL TEXAS TONIGHT THROUGH TUESDAY MORNING. COMPOUNDING THE SITUATION WILL BE THE POTENTIAL FOR THUNDERSTORMS...WHICH COULD PRODUCE POCKETS OF MORE INTENSE SLEET AND FREEZING RAIN. ICE ACCUMULATION COULD BE 1/10 INCH OR MAYBE A LITTLE MORE IN THE WINTER STORM WARNING AREA. LIGHT ICE ACCUMULATIONS ARE POSSIBLE IN THE ADVISORY AREA... MAINLY LIMITED TO BRIDGES AND OVERPASSES. THE PRECIPITATION SHOULD TAPER OFF FROM THE WEST BY NOON TUESDAY AND TEMPERATURES WILL WARM ABOVE FREEZING. TXZ171>173-192>194-209-041100- /O.CON.KEWX.WS.W.0001.000000T0000Z-140304T1800Z/ LLANO-BURNET-WILLIAMSON-TRAVIS-BASTROP-LEE-FAYETTE- INCLUDING THE CITIES OF...LLANO...BURNET...GEORGETOWN...AUSTIN... BASTROP...GIDDINGS...LA GRANGE 857 PM CST MON MAR 3 2014 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL NOON CST TUESDAY... * TIMING...THROUGH NOON TUESDAY. * MAIN IMPACT...FREEZING RAIN AND SLEET...POTENTIALLY ACCUMULATING TO 1/10 INCH. ROADWAYS MAY BECOME HAZARDOUS... ESPECIALLY ELEVATED ROADS SUCH AS BRIDGES AND OVERPASSES. * OTHER IMPACTS...SENSITIVE PLANTS SHOULD BE COVERED AND PEOPLE AND PETS SHOULD BE INDOORS TO PREVENT HYPOTHERMIA. THUNDERSTORMS WITH WITH POCKETS OF MORE INTENSE SLEET AND FREEZING RAIN ARE ALSO POSSIBLE. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING MEANS ACCUMULATIONS OF SNOW...SLEET... FREEZING RAIN OR FREEZING DRIZZLE ARE EXPECTED OR OCCURRING. THIS WILL CAUSE CONSIDERABLE TRAVEL PROBLEMS AND MAY POSE A THREAT TO LIFE AND PROPERTY.
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