NWS: Big changes ahead

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November 29, 2009

Anonymous The San Marcos Record Sun Nov 29, 2009, 11:19 AM CST

The following was released by the National Weather Service Sunday morning:

A cold front will be pushing through south central Texas later today and

tonight bringing in much colder air that will stay over the area for the

next several days. In addition...a large upper level low pressure area

over CA/Baja CA will move east over the next few days. This upper low

will produce overrunning rains Monday and Tuesday that could amount to 1-3

inches in some spots. With temperatures expected to be in the 40s to near

50, it will make for a cold rain. Some areas may have to deal with some

isolated flooding issues...but with the rain expected to be over a 48 hour

period...it should minimize the threat. Best chances of heavy rain will

be east of the I-35 corridor.

This most interesting and difficult part of the forecast will come Tue-Wed

when the upper low finally tracks across Texas. This will bring cold

upper level temperatures that will allow some areas over the far western

hill country to maybe see some snow mixing with rain mainly Tue afternoon

into eary Wed morning. Rains should be exiting the area by Wed afternoon.

As of right now....surface temperatures and ground temperatures appear

too warm to allow the snow or ice to accumulate...but of course anytime

you deal with ice/snow in the hill country there is the threat for slick

spots on roads and bridges. We should be able to fine tune the forecast

and any ice threat as we get closer to the event...but as of right

now...the overall threat for accumulating ice/snow appears small.

Please keep track of the latest forecasts, watches, warnings, advisories,

and statements through our website at www.srh.noaa.gov/ewx. I have also

attached a graphic that was developed this morning and is available on the

website as well.

Paul Yura

National Weather Service Austin-San Antonio TX

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