Updated 845am CDT Tuesday / 12 March 2013

A Dry and Stable Late Winter Weather Pattern…

On this Tuesday… a surface high pressure area is over northeastern Louisiana. A deepening area of low pressure is over northwest Texas with a cold front extending westward into northern New Mexico. Given this surface pressure pattern, surface winds are south southeasterly across our area of Texas.

In the upper levels of the atmosphere, a broad upper air trough.. or line.. is located over the eastern 2/3rds of the country. As a result of this upper air wind flow, our upper level winds are light northwesterly with winds over Austin at about 18,500 feet blowing about 30 to 35 mph.

The surface high.. to the east of the area.. will continue to move eastward into the southeasterly USA and the western Atlantic as the low pressure area to the northwest moves quickly eastward with a weak cold front moving through the area by tonight. This front will simply reinforce the dry and stable air mass in place across the area.

Following the weak cold front tonight.. south southeasterly surface winds will quickly return to the area by tomorrow night into Thursday. Low level moisture will begin the return to the area as well with late night and early morning low cloud cover by as early as Friday night into Saturday morning.

Another cold front… this one rather weak in nature.. is due by Sunday night into Monday morning. At this point, limited moisture.. instability and atmospheric lift will preclude any rain chances.

Have a good Monday night and Tuesday…
Meteorologist Troy Kimmel

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Austin / Travis County and South Central Texas Weather Update #3 – FINAL STATEMENT
Prepared by Incident Meteorologist Troy Kimmel (www.troykimmelweather.com)
1240am CST – Sunday / 10 March 2013

…. Thunderstorms Moving Across IH35 Corridor ….

At 1235am CST.. Doppler weather radar shows a broad line of rain showers and thunderstorms
crossing the IH35 corridor.. from north central Texas through Temple.. then southwestward
through the Georgetown.. Round Rock .. and Austin metro areas to near Blanco and further
southwestward to west of San Antonio. The line is moving eastward while the individual
thunderstorms in the line are moving northeastward.

At this point.. no severe weather is indicated in our area with beneficial rains accompanying
occasional to frequent  dangerous lightning  and some gusty winds.  Severe weather.. as  I had
expected.. has generally been west.. northwest and north of the local area. Currently, there is a
very strong thunderstorm moving eastward just northwest of San Antonio and residents of Hays..
Bastrop.. Caldwell and Fayette Counties need to monitor this storm over the next few hours for
severe weather potential.

Over the next few hours.. the precipitation will continue to move eastward with cooler and
more stable air moving into the area with any threat of severe weather diminishing.

Remember that a Severe Thunderstorm Watch remains in effect until 2am CST/3am CDT
(the actual time change hour) for all of the area.. however, the threat is already diminishing
pretty rapidly in areas along and west of the IH35 corridor from the Austin area northward.

This is my final statement concerning this weather event.

tk