Weather Forecasts
and Outlooks
Central Texas
Weather Outlook for 05-16-2012 through 05-23-2012
[Updated at 8:00am
05-16-2012]
When this
page is not being updated, here is a good alternative: Central
Texas Zoom Radar
Tropical
Storm Aletta has developed well off the southwest coast of
Mexico. The storm is moving west (away from land). See my
updated Tropical
Weather Page for
details.
This Week's
Lake Levels
[updated weekly on
Monday unless heavy rains occur during the week]
Forecast Discussion:
Morning
surface analysis found a large area of mainly weak high
pressure from southern Canada all the way to the Gulf of
Mexico. Embedded in the high pressure area is a weak cold
front that stretches from the eastern Great Lakes to near
St. Louis, MO to the OK-KS border then west to the Front
Range of the Rockies near Denver, the north-northwest along
the High Plains-Rocky Mountain interface. Weak low pressure
areas are found over the U.S. east coast and just inland
from the U.S. west coast.
Morning upper air anaysis found the cut-off mid-tropospheric
vortex that moved across Texas the past two days to still be
over southeastern Texas near Houston. This circulation and
attendant impact on ascent in the lower and middle
troposphere may again today provide an impetus for scattered
thunderstorms activity during the afternoon hours, but
mainly confined to southeastern Texas and the immediate
coastal areas and near-shore waters southwest down the Texas
coast to Brownsville.
Morning upper air soundings from stations in/near Central
Texas show a significant decrease in precipitable water (PW)
at all stations except those near the Texas and Louisiana
coastal areas.

Latest Surface Analysis from
HPC
HPC 5-Day (120-hour) QPF
graphic valid 7am CDT Today through 7am CDT Monday
Graphic posted today on NWSFO Fort Worth homepage
The graphic above was
posted today on the homepage of the NWS Forecast Office in
Fort Worth. It purports to show that "dry conditions are
returning" to North Texas. The apparent thrust of this message
was to create public concern that the drought is rearing its
head again. Before I go any further, let me say that I have
much admiration for the Fort Worth NWS office, and I don't
want what I say here to be some sort of general criticism of
the men and women who work there. But ... I have to tell you
that whoever decided to "wag the dog" in this manner is
ignoring reality! Grabbing the last 30 days as some signal
that dry conditions are returning is myopic. Let me show why I
say that.
I'll start with rainfall records for my backyard
CoCoRahs measuring site located 4.7 miles west of downtown
Temple: For the period January 1st through today, I have
measured 20.5 inches of rain. That breaks out as follows:
January=3.36"; February=3.94"; March=8.19"; April=2.61"; so
far in May=2.40".
After pulling those numbers from my daily submissions
to CoCoRahs, I thought, well, maybe it has just been wetter
here than elsewhere. So, from the NWSFO Fort Worth website, I
obtained the Waco airport rainfall records. Waco's records
look like this: January=4.24"; February=2.80"; March=8.33";
April=1.66"; May through the 14th=1.48"; total since January
1st=18.51". To put that in perspective, the normal for Waco
through May 14th is 12.51", so Waco is 6 inches above normal
since January 1st.
After pulling those numbers for Waco airport, I
thought, well, maybe it has just been wetter at Waco than at
the DFW airport. So, from the NWSFO Fort Worth website, I
obtained the DFW airport rainfall records. DFW's records look
like this: January=6.18; February=1.88"; March=5.74";
April=4.24"; May through the 14th=0.80"; total since January
1st=18.84".
So, my backyard compares closely to the Waco airport which
compares closely to the DFW airport when one considers the
year-to-date rainfall at all three locations. I came away from
this little exercise thinking ... "Heck, there are probably a
lot of folks who didn't object to the 30-day (relative) dry
spell after all the rain we had in January through
March!" And it doesn't stop there ... since September
15th, I have recorded almost 30 inches of rain here on the
western side of Temple!
I will admit that the computer models are showing a relatively
dry trend for the next ten days to two weeks for this part of
Texas. I will add that several times since January 1st, what
was shown as a dry spell by the extended range models ended up
being on the wet side. Will that trend continue? Don't know!
NWS NEXRAD RADAR FOR CENTRAL TEXAS

Latest
image from the NWS/DOD Central Texas nexrad.
24-frame LOOP
of GRK radar.
[The time stamps on the image are in Coordinated
Universal Time (UTC). To convert to CST, subtract 6 hours.
For example, 1800UTC is 1200CST (i.e. 12 noon).]
[Image
provided by and used with permission of Paul Sirvatka, Next
Generation Weather Lab, College of DuPage]
Latest composite nexrad image for Texas and nearby
states
LOOP
this radar view.***Not currently available***
[Image
provided by and used with permission of Paul Sirvatka, Next
Generation Weather Lab, College of DuPage]
Close-up
Visible Satellite View of Central Texas
Close-up visible satellite view of our part of
Texas. Since it is a visible image, it requires
sunlight, so this product will only show clouds during
daylight hours. This product is generated
by my friend Gilbert Sebenste at Northern Illinois
University, and is used with his permission.
Central Texas Tornado History
May 12-19:
On May 12, 2000 ...
NCDC:A tornado
formed over the central part of Lake Whitney at
approximately 1610 CST. The tornado moved south and
dissipated near the dam at 1625 CST. The tornado caused two
deaths, both of which occurred in the same home, but no
other injuries. The most significant damaged occurred at the
Lakewood Harbor Subdivision, three miles northwest of the
Dam, around 1615 CST. 38 homes were destroyed and 27 others
were damaged. M70PH, F80PH May 12, 2000 - Event Narrative: A cold
front moved into North Texas, and became stationary along a
Bonham, Dallas, Hillsboro, Goldthwaite line. Numerous hail
and wind reports were received. An F-3 tornado touched down
near Lake Whitney in the late afternoon hours.The parent
storm continued to develop on the south flank, resulting in
a long lived wall cloud that moved south through southern
Bosque, western McLennan, eastern Coryell, and western Bell
counties. While reports of hail and funnels continued
through the life of the storm, no additional tornadoes were
sighted. }
On May 12, 1982, a tornado developed in Parker County
ten miles south of Weatherford. The tornado moved
east-northeast to ten miles east-southeast of Weatherford.
It struck a mobile home park and destroyed five mobile homes
and damaged twelve others. Damage was rated F2. A number of
barns were damaged. The maximum path width was 150 yards and
the path length was eight miles. There were six injuries but
no deaths.
On May 13, 1994, a tornado developed near Marble Falls in
Burnet County. Damage was rated F3, with three injuries but
no deaths.
NCDC:The storm
approached the city from the west-southwest. There were
unconfirmed reports of funnels in the Horseshoe Bay area,
four miles southwest of Marble Falls, before the storm
arrived. Spotty damage was reported to roofs in the
Horseshoe Bay area. The tornado first struck the west side
of the city, crossing a heavy commercialized and residential
area. Roofs were severely damaged at this time with several
structures sustaining F1 and F2 damage. Several boats at a
dealership were tossed on top of each other. Two-by-four's
were embedded into the side of a church preschool care
center, penetrating an inside classroom wall by four to five
feet. Fortunately, all children had been moved into hallways
just before the tornado arrived. Numerous commerical signs
were down with widespread roof damage. This damage became
even more extensive as the tornado moved across the northern
part of the city. Marble Falls primary school also sustained
damage, but students had been evacuated to the main school.
Trees were uprooted on the school grounds and damage was
reported to outbuildings. Metal I-beams were bent at a
nearby metal building, indicating F2 to F3 damage. Three
nearby semi-tractor trailer delivery trucks and a bread
delivery truck were overturned. Two of these trucks were
reported to have been lifted "two to three feet off of the
ground" as they were overturned. At a nearby Wal-Mart
department store 100 to 200 employees had taken shelter,
having practiced their severe weather drill the day before.
The store was hit and severely damaged, with the employees
sustaining only a few minor injuries. Additional roof damage
was reported at Marble Falls High School. Students had just
executed a tornado drill as the storm struck. There was
extensive peeling of metal from the auditorium and gymnasium
roofs. In summary, over 440 homes sustained damage, with one
house and 17 mobile homes destroyed and major damage to 36
homes. Eighteen businesses reported major damage with 47
others reporting minor damage. In addition, two bridges were
damaged, along with severe damage to schools. In all, 512
structures sustained damage.
On May 15, 1922, a tornado developed in McLennan County
north of Lorena. Damage was rated F2. There were no deaths
or injuries.
That same day, another tornado developed in McLennan County
near Downsville. Damage was rated F2. There were two
injuries but no deaths.
That same day, a tornado developed in Williamson County
northeast of Taylor. The tornado produced damage rated F2,
but there were no deaths or injuries.
On May 16, 1953, a tornado developed in Leon County near
Jewitt. The tornado moved from five miles southwest of
Jewitt to near Centerville. It produced damage rated F2,
with three injuries but no deaths. The tornado had a maximum
path width of 150 yards and a path length of 12 miles.
On May 17, 1939, a tornado developed near Hewitt in McLennan
County. Damaged was rated F2. There were three injuries and
one death which occurred when one house was destroyed. Wind
and hail caused over $1 million in damage across Central
Texas on this day.
On May 17, 1989, a tornado developed 3 miles south-southwest
of Jarrell in Williamson County shortly after 4:30am. The
tornado moved to the northeast right up IH-35 through
Jarrell. Many homes were damaged or destroyed. Damage was
rated F3. There were 28 injuries and one death. The maximum
path width was 1,500 yards but the path length was less than
five miles.
On May 18, 1902, a tornado developed near Ben Hur in
Limestone County and moved through the Shiloh community to
Fairfield in Freestone County. Twelve people were injured
and three were killed. The deaths occurred in the Ben Hur
community. Thirty homes were damaged or destroyed in
Fairfield, and the county courthouse was one of the
buildings damaged. The path width of this tornado is not
recorded but the path length was 40 miles.
On this same day, not truly in Central Texas but not too far
removed, a violent tornado struck Goliad in Goliad County,
southeast of San Antonio between Victoria and Beeville.
Damage was rated F4. The tornado caused 114 deaths and at
least 250 injuries. The maximum path width was 250 yards,
and the path length was 15 miles. It was reported that
many of the deaths occurred days after the tornado event as
people who were injured died of their wounds.
On May 18, 1935, a tornado developed at Caldwell in
Burleson County. Fifteen homes were damaged but there were
no reported injuries or deaths. Damage was rated F2. The
maximum path width was 100 yards and the path length was two
miles.
That same day, a tornado developed a Hearne in Robertson
County. Damage was rated F2. There were eight people injured
but no deaths. Eight homes were destroyed and thirty were
damaged. The maximum path width was 200 yards and the path
length was six miles. It is possible that the same
thunderstorm that produced the Caldwell tornado also
produced the Hearne tornado.
That same day, a tornado developed in Freestone County four
miles east of Fairfield. Several homes were damaged or
destroyed. The damage wasd rated F2. One person was
injured. The maximum path width was 70 yards and the path
length was fifteen miles. Numerous tornadoes occurred
outside of Central Texas later the same day.
On May 18, 1966, a tornado developed near Florence in
Williamson County. Damage was rated F2. There were no
injuries or deaths.
Each day I will
provide information if significant tornadoes (that is, with
damage rated F2 or greater) have occurred on that given
date in the past. This history will be for Central Texas, roughly
bounded on the north by Weatherford, Fort Worth and
Dallas, on the east by Corsicana and Centerville, on the
southeast by College Station, on the south by San Antonio,
on the southwest by Junction, and on the northwest by
Brownwood. Click
here for a map showing counties covered.
Additional Radar Resources
Nexrad data from the Central Texas nexrad radar
(GRK, near Granger) and six other nearby nexrad radars. On
each page, clicking on the radar image will bring up the VAD
Wind Profile from that radar. Across the top of each page,
you can also select other products from the GRK radar only.
All of these images are displayed courtesy of Paul Sirvatka
at the College of DuPage.
>>>For GRK and radars west through
north, click this link.
>>>For GRK and radars southeast through
southwest, click this link.
Joplin Tornado
on Springfield, Missouri WSR-88D (Nexrad)
I have created
some four-panel graphics showing the evolution of the tornado
that devastated Joplin, Missouri on Sunday , May 22nd). Each
of the four-panel graphics shows 0.5 deg base reflectivity,
0.5 degree storm-relative velocity, echo tops, and normalized
rotation (Nrot). All of these were generated using the
GR2-Analyst software and archived Level 2 radar data obtained
from the NCDC nexrad archive website. The current views cover
5:05pm CDT through 5:48pm CDT. KSGF was operating in VCP
211 during this event. I will probably add some
additional times both prior to 5:05pm and subsequent to
5:48pm. Click on the time from the list below to view the
graphic for that time.
I have
created some four-panel graphics showing the evolution of the
tornado that devastated Joplin, Missouri on Sunday, May
22nd. Each of the four-panel graphics shows 0.5 deg base
reflectivity, 0.5 degree storm-relative velocity, echo tops,
and normalized rotation (Nrot). All of these were generated
using the GR2-Analyst software and archived Level 2 radar data
obtained from the NCDC nexrad archive website. The current
views cover 5:05pm CDT through 5:48pm CDT. KSGF was
operating in VCP 211 during this event. For those who might
want to know, the SGF radar site is 54nm from Joplin on a
heading of ~080 degrees. I will probably add some additional
times both prior to 5:05pm and subsequent to 5:48pm. Click on
the time from the list below to view the graphic for that
time.
{As of 6-1-2011 at 6:00pm CDT, I have edited all of the SRV
and NROT products to delete the automated MESO and TVS detects
in the interest of better viewing of the raw data.]
2205UTC/5:05pm
2210UTC/5:10pm
2215UTC/5:15pm
2219UTC/5:19pm
2224UTC/5:24pm
2229UTC/5:29pm
2234UTC/5:34pm
2239UTC/5:39pm
2244UTC/5:44pm
2248UTC/5:48pm
Here are links
to the following products: Surface data plots for 3:00pm,
4:00pm
and 5:00pm
(note the backing surface wind at Joplin); VAD wind profile
plots from SGF WSR-88D at 3:57pm
and 5:00pm
CDT; and the 7pm CDT (23/00UTC) SGF upper
air sounding (skew-T) and hodograph.
May 6,
2006 Waco Tornado: Radar images and
other information on second Waco tornado in one week period
...
March
21, 2005 Tornado near Marlin Preliminary
data and link to photos by Bill Purcell, a storm
chaser from Houston ...
Memorial
Day
Storm, 2004: Images from the
5-31-2004 (Memorial Day) severe thunderstorm that affected
Bell and Falls counties ...
Jarrell
'Reprise':A Fresh Look at the Central
Texas Tornado Outbreak of 1997 ...
On
the Automated Detection of Severe Storms and Tornadoes:
Can Doppler radar automatically detect or predict
tornadoes?
If you need a refresher on the significance of
severe storm forecast parameters, click here
.
When I am unable to get updates posted, please
refer to issuances from the Storm Prediction Center (links
below) and to the Hazardous
Weather Outlookproduct issued by
Fort Worth and other NWS offices.
Current Severe
Storm Warnings and Forecasts
Current
Warnings
and Advisories for Texas
Storm
Prediction
Center Discussion for Localized Threats (MCD)
Storm
Prediction
Center Outlooks (Day 1, Day 2, Day 3 and Experimental
Days 4-8)
Storm
Prediction
Center Severe Storm and Tornado Watches
Tornado
Outbreaks
Spawned
by Tropical Cyclones at Landfall
The subject of tornadoes
produced by landfalling tropical cyclones (tropical storms and
hurricanes) has been a fascination (and a research interest)
of mine for years. After working through several iterations of
the research, the final manuscript was submitted an the A.M.S.
journal. The A.M.S. journals, like most scientific
publications, subject proposed articles to a formal peer
review process. My manuscript has now been published in the
April issue of Weather and Forecasting. Here
is a link to the article. [Note: viewing requires Adobe
Acrobat Reader.]
Computer Forecasts
of Severe Storm Parameters
Have you ever wondered
how computer models of the atmosphere can be used to
forecast severe storms, check out this section
in which I briefly explain some of the computer products and
parameters used in forecasting severe storms.
Severe Storms in
Central Texas
Click here to access a section describing the forecasts and
nowcasts of significant severe storm events in Central
Texas!
Other Related Links
Current
Southern Plains Surface Map (ideal for doing your own
analysis)
Latest
Hi-Res Visible Satellite Image centered on Central Texas
Latest
Water
Vapor Satellite Image from the eastern GOES
Highway Overpasses are not tornado shelters! Click here to
find out why.
Back to my
main homepage
Jump
to my section on storm and nature photography
And perhaps you'd like to
know how we're doing on rainfall and soil moisture
conditions so far this year. Here's a clickable
link to the Climate Prediction
Center's latest map showing the Drought Severity Index
(Palmer Long Term Index) for the U.S. By the way, if you're
looking for that neat high-resolution visible satellite
image which previously occupied this space, it's gone. But
if you liked that shot, you can get them directly from
NASA's Global Hydrology and Climate Center at the NASA MSFC,
Huntsville, Alabama at this clickable
link.
This page was last
updated on 12-16-2011.
If you have
comments or suggestions, email me at curtis@vvm.com
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