Wednesday, May 11, 2011

Severe Weather Update - Austin/San Antonio Corridor

***Update 11:34 PM CDT:
The heaviest rain we've seen in over 90 days is currently falling at our home near Kyle, TX.  Thank you, Lord!  This is much appreciated!  We would have taken whatever wind and/or hail was necessary along with it, but so far it has just been plain, good old fashioned rain...

***Update 10:31 PM CDT:
The thunderstorm entering western Hays County has reached severe limits, with radar estimating 1 inch or larger hail (as indicated by the white and grey shaded areas on the right half of the image below).  This storm is moving East at 25mph, toward the I-35 corridor.

***Update 10:05 PM CDT:
The latest radar image below shows that the storm over westcentral and northwest Travis County and the Lago Vista area continues to slowly weaken, although hail up to three-quarters of an inch in diameter is still indicated.

Meanwhile, the storm entering western Hays County, to the West of Woodcreek and Dripping Springs has intensified as of the last 10-15 minutes, with radar currently indicating 1 inch diameter hail with this storm.

Movement is East to East/Northeast at 25 mph.

***Update 9:47 PM CDT:
The severe thunderstorm entering western Travis county and approaching the West and Northwest sides of Austin has weakened slightly since our last update, but radar still estimates hail up to 1 inch in diameter is possible with this storm (as indicated by the white and grey shaded areas on the right half of the image below):

If the present track continues, the strongest part of the storm will reach Lago Vista around 10pm.

***Update 9:20 PM CDT:
The severe thunderstorm currently over southern Burnet county is moving East at 25 mph.  On its present track, this storm will begin to impact the western portions of Austin, including Lago Vista, Briarcliff and Jonestown, within the next 45 minutes.  The white and grey areas on the right half of the image below shows where the radar is estimating hail up to golfball size with this storm:

---------------Original Post Below:

The above image of the Austin/San Antonio radar was taken just a moment ago.  A line of strong to severe thunderstorms extends from West of Johnson City to just West of the Temple/Belton area.  This activity is moving East to East/Northeast at 25 mph.  Large hail and strong winds are possible with this activity, along with dangerous lightning and very heavy rain.

Thus far, thunderstorm activity has remained North of the Austin-San Antonio area.  During the past 60-90 minutes, the activity from near Fredericksburg to Johnson City has begun to develop more toward the South.  In addition, the thin line as noted by the red circle on the image above signifies a boundary being produce by cool air flowing Southward out of the thunderstorms to the North.  Additional thunderstorm development may take place along and/or near this boundary over the next few hours.

Finally, back to the West along the dryline, you can see new thunderstorm development taking place near Junction, as noted by the light green circled area.

All of the above means that conditions will remain unsettled across southcentral Texas, including potentially the Austin and San Antonio areas, for the next 3-4 hours.

Large hail, strong winds and very heavy downpours, along with dangerous lightning, are the primary threats with thunderstorm activity across the region.  An isolated tornado also cannot be ruled out, particularly with any storm that is able to isolated itself and become better organized.

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