Alert archive / Texas / Tornado Watches in 2016

Tornado Watch 37

March 8, 201635 counties in Texas

The Storm Prediction Center issued this tornado watch at Mar 8, 2016, 7:24 AM CST for 35 counties in Texas. It was in force for 8 hr.

The area

The outline as issued.

The facts

Issued
Mar 8, 2016, 7:24 AM CST (13:24 UTC)
Expired
Mar 8, 2016, 3:00 PM CST
In force
8 hr
Issued by
the Storm Prediction Center
Largest hail expected
2 in
Strongest gust expected
60 kt
All 35 counties

Anderson County, TX, Bastrop County, TX, Bell County, TX, Blanco County, TX, Brazos County, TX, Burleson County, TX, Burnet County, TX, Caldwell County, TX, Coryell County, TX, Ellis County, TX, Falls County, TX, Fayette County, TX, Freestone County, TX, Grimes County, TX, Hays County, TX, Henderson County, TX, Hill County, TX, Houston County, TX, Johnson County, TX, Kaufman County, TX, Lampasas County, TX, Lee County, TX, Leon County, TX, Limestone County, TX, Llano County, TX, Madison County, TX, McLennan County, TX, Milam County, TX, Navarro County, TX, Rains County, TX, Robertson County, TX, Travis County, TX, Van Zandt County, TX, Washington County, TX, Williamson County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 99 km from the middle of the area, began a volume at 13:24 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What SPC expected

The probabilities SPC published with the watch, for the watch area over its life.

Two or more tornadoes
40%
One or more EF2 to EF5 tornadoes
20%
Ten or more severe wind reports
50%
One or more gusts of 65 knots or more
10%
Ten or more severe hail reports
30%
One or more hailstones of 2 inches or more
30%
Six or more combined severe hail and wind reports
80%

Warnings issued inside it

13 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
Mar 8, 7:37 AM CSTSevere Thunderstorm WarningEWXBurnet, Llano38 min
Mar 8, 7:43 AM CSTSevere Thunderstorm WarningFWDLampasas62 min
Mar 8, 7:46 AM CSTTornado WarningFWDHood, Johnson, Parker, Tarrant29 min
Mar 8, 7:50 AM CSTSevere Thunderstorm WarningFWDJohnson40 min
Mar 8, 7:56 AM CSTTornado WarningFWDLampasas49 min
Mar 8, 8:26 AM CSTTornado WarningFWDCoryell, Lampasas34 min
Mar 8, 8:59 AM CSTSevere Thunderstorm WarningFWDCoryell38 min
Mar 8, 9:16 AM CSTTornado WarningEWXWilliamson29 min
Mar 8, 9:22 AM CSTSevere Thunderstorm WarningFWDBell, Coryell53 min
Mar 8, 12:19 PM CSTSevere Thunderstorm WarningFWDHenderson, Navarro56 min
Mar 8, 12:34 PM CSTTornado WarningFWDHenderson26 min
Mar 8, 12:43 PM CSTSevere Thunderstorm WarningFWDVan Zandt47 min
Mar 8, 12:52 PM CSTTornado WarningFWDVan Zandt38 min

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

The nearest sounding before it

Fort Worth, TX (KFWD), launched 12:00Z, 1.4 hours before the alert went out and 127 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Fort Worth, TX at 12:00Z on 2016-03-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1032 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Fort Worth, TX at 12:00Z on 2016-03-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 291 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
1032 J/kg
Mixed-layer CIN
-11 J/kg
Mixed-layer LCL
548 m above ground
0-6 km bulk shear
48 kt
0-1 km storm-relative helicity
291 m²/s²
0-3 km storm-relative helicity
219 m²/s²
Significant tornado parameter
1.5
Supercell composite
6.5

Open this sounding in Storm Lab

The text

As transmitted.

741 
WWUS20 KWNS 081321
SEL7  
SPC WW 081321
TXZ000-081900-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 37
NWS STORM PREDICTION CENTER NORMAN OK
725 AM CST TUE MAR 8 2016

THE NWS STORM PREDICTION CENTER HAS ISSUED A

* TORNADO WATCH FOR PORTIONS OF 
  CENTRAL TEXAS

* EFFECTIVE THIS TUESDAY MORNING AND AFTERNOON FROM 725 AM UNTIL
  100 PM CST.

* PRIMARY THREATS INCLUDE...
  A COUPLE TORNADOES POSSIBLE
  SCATTERED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE
  ISOLATED VERY LARGE HAIL EVENTS TO 2 INCHES IN DIAMETER POSSIBLE

SUMMARY...A BROKEN BAND OF THUNDERSTORMS...INCLUDING A FEW
SUPERCELLS CAPABLE OF SEVERE HAIL...DAMAGING WIND...AND
TORNADOES...WILL MOVE GENERALLY EAST-NORTHEAST ACROSS WATCH AREA
THROUGH EARLY AFTERNOON. OTHER STORMS MAY FORM AHEAD OF THE LINE
ACROSS EAST CENTRAL TEXAS.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 100 STATUTE
MILES EAST AND WEST OF A LINE FROM 25 MILES EAST OF DALLAS TEXAS
TO 25 MILES SOUTH OF AUSTIN TEXAS.  FOR A COMPLETE DEPICTION OF
THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS
WOU7).

PRECAUTIONARY/PREPAREDNESS ACTIONS...

REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH
AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR
THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS
AND POSSIBLE WARNINGS.

&&

OTHER WATCH INFORMATION...CONTINUE...WW 36...

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
500. MEAN STORM MOTION VECTOR 23030.


...CORFIDI

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Mar 7, 6:42 PM CSTMesoscale DiscussionSPCBosque, Comanche, Cooke, Dallas, Denton, Ellis and 10 more63 min
Mar 7, 11:41 PM CSTMesoscale DiscussionSPCBorden, Coke, Concho, Crane, Crockett, Dawson and 27 more2 hr
Mar 8, 1:18 AM CSTSevere Thunderstorm WatchSPCBosque, Brown, Callahan, Coke, Coleman, Collin and 48 more10 hr
Mar 8, 3:36 AM CSTMesoscale DiscussionSPCArcher, Baylor, Childress, Clay, Cottle, Dickens and 6 more84 min
Mar 8, 3:57 AM CSTMesoscale DiscussionSPCArcher, Baylor, Brown, Callahan, Clay, Coleman and 36 more2 hr
Mar 8, 7:06 AM CSTMesoscale DiscussionSPCAnderson, Austin, Bastrop, Bell, Blanco, Bosque and 64 more2 hr
Mar 8, 9:00 AM CSTMesoscale DiscussionSPCAnderson, Bastrop, Bell, Bosque, Burleson, Burnet and 35 more90 min
Mar 8, 10:46 AM CSTMesoscale DiscussionSPCAngelina, Cherokee, Hardin, Houston, Jasper, Liberty and 12 more89 min
Mar 8, 12:41 PM CSTTornado WatchSPCAngelina, Austin, Bowie, Camp, Cass, Chambers and 34 more5 hr
Mar 8, 1:10 PM CSTMesoscale DiscussionSPCBell, Blanco, Bosque, Brown, Burnet, Coke and 32 more95 min
Mar 8, 3:11 PM CSTMesoscale DiscussionSPCAnderson, Angelina, Bowie, Cass, Chambers, Cherokee and 24 more94 min
Mar 8, 5:52 PM CSTMesoscale DiscussionSPCAngelina, Hardin, Jasper, Newton, Sabine, San Augustine and 2 more83 min

Nearby

Tornado Watches in Texas, 2016Every tornado watch in 2016

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.