Alert archive / Texas / Tornado Watches in 2015
Tornado Watch 200
The Storm Prediction Center issued this tornado watch at May 23, 2015, 10:00 PM CDT for 40 counties in Texas. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- May 23, 2015, 10:00 PM CDT (03:00 UTC)
- Expired
- May 24, 2015, 4:00 AM CDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 0.5 in
- Strongest gust expected
- 65 kt
All 40 counties
Anderson County, TX, Austin County, TX, Bell County, TX, Bosque County, TX, Brazos County, TX, Burleson County, TX, Collin County, TX, Colorado County, TX, Coryell County, TX, Dallas County, TX, Delta County, TX, Denton County, TX, Ellis County, TX, Falls County, TX, Fannin County, TX, Freestone County, TX, Grayson County, TX, Grimes County, TX, Hamilton County, TX, Henderson County, TX, Hill County, TX, Hopkins County, TX, Hunt County, TX, Johnson County, TX, Kaufman County, TX, Lamar County, TX, Lampasas County, TX, Leon County, TX, Limestone County, TX, Madison County, TX, McLennan County, TX, Milam County, TX, Navarro County, TX, Rains County, TX, Robertson County, TX, Rockwall County, TX, Tarrant County, TX, Van Zandt County, TX, Waller County, TX, Washington County, TX
The radar
The Dallas/Ft Worth radar (KFWS), 67 km from the middle of the area, began a volume at 03:04 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
- 30%
- One or more EF2 to EF5 tornadoes
- 20%
- Ten or more severe wind reports
- 30%
- One or more gusts of 65 knots or more
- 30%
- Ten or more severe hail reports
- 10%
- One or more hailstones of 2 inches or more
- 5%
- Six or more combined severe hail and wind reports
- 60%
Warnings issued inside it
11 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 23, 10:15 PM CDT | Severe Thunderstorm Warning | FWD | Bell, Milam | 75 min |
| May 23, 10:33 PM CDT | Severe Thunderstorm Warning | HGX | Burleson | 27 min |
| May 23, 11:01 PM CDT | Severe Thunderstorm Warning | HGX | Brazos, Burleson | 44 min |
| May 23, 11:12 PM CDT | Flash Flood Warning | FWD | Bell, Coryell | 3 hr |
| May 23, 11:12 PM CDT | Severe Thunderstorm Warning | FWD | Robertson | 39 min |
| May 23, 11:37 PM CDT | Flash Flood Warning | FWD | Dallas, Ellis | 3 hr |
| May 24, 2:27 AM CDT | Flash Flood Warning | FWD | Denton, Tarrant | 3 hr |
| May 24, 2:27 AM CDT | Tornado Warning | FWD | Dallas, Tarrant | 18 min |
| May 24, 2:36 AM CDT | Flash Flood Warning | FWD | Collin, Dallas | 3 hr |
| May 24, 3:25 AM CDT | Flash Flood Warning | FWD | Cooke, Grayson | 3 hr |
| May 24, 3:39 AM CDT | Severe Thunderstorm Warning | HGX | Austin, Colorado, Jackson, Matagorda, Wharton | 36 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 00:00Z, 3.0 hours before the alert went out and 86 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.
- Mixed-layer CAPE
- 537 J/kg
- Mixed-layer CIN
- -56 J/kg
- Mixed-layer LCL
- 858 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 197 m²/s²
- 0-3 km storm-relative helicity
- 288 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 4.7
The text
As transmitted, in the capitals the NWS used until 2016.
680 WWUS20 KWNS 240258 SEL0 SPC WW 240258 TXZ000-240900- URGENT - IMMEDIATE BROADCAST REQUESTED TORNADO WATCH NUMBER 200 NWS STORM PREDICTION CENTER NORMAN OK 1000 PM CDT SAT MAY 23 2015 THE NWS STORM PREDICTION CENTER HAS ISSUED A * TORNADO WATCH FOR PORTIONS OF EAST CENTRAL AND NORTH TEXAS * EFFECTIVE THIS SATURDAY NIGHT AND SUNDAY MORNING FROM 1000 PM UNTIL 400 AM CDT. * PRIMARY THREATS INCLUDE... A COUPLE TORNADOES POSSIBLE ISOLATED SIGNIFICANT DAMAGING WIND GUSTS TO 75 MPH POSSIBLE SUMMARY...A CLUSTER OF STRONG TO LOCALLY SEVERE THUNDERSTORMS EXPECTED TO MOVE/DEVELOP NORTHEAST FROM THE AUSTIN AREA TOWARD WACO AND PARTS OF NORTH TEXAS THROUGH EARLY SUNDAY. OTHER...MORE ISOLATED STORMS MAY STRENGTHEN AHEAD OF THE CLUSTER. THE STORMS MAY YIELD OCCASIONAL DAMAGING WIND GUSTS AND ISOLATED TORNADOES. THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 60 STATUTE MILES EAST AND WEST OF A LINE FROM 35 MILES EAST NORTHEAST OF SHERMAN TEXAS TO 55 MILES EAST OF NEW BRAUNFELS TEXAS. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU0). 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 197...WW 198...WW 199... AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT TO 0.5 INCH. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 65 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550. MEAN STORM MOTION VECTOR 21030. ...CORFIDI
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 23, 8:39 PM CDT | Mesoscale Discussion | SPC | Atascosa, Bastrop, Bee, Bexar, Blanco, Caldwell and 18 more | 2 hr |
| May 23, 8:57 PM CDT | Mesoscale Discussion | SPC | Archer, Baylor, Clay, Cooke, Denton, Fannin and 7 more | 93 min |
| May 23, 9:46 PM CDT | Mesoscale Discussion | SPC | Anderson, Austin, Bell, Bosque, Brazos, Burleson and 28 more | 89 min |
| May 23, 10:31 PM CDT | Severe Thunderstorm Watch | SPC | Aransas, Brooks, Cameron, Hidalgo, Jim Hogg, Jim Wells and 8 more | 5 hr |
| May 23, 11:32 PM CDT | Mesoscale Discussion | SPC | Anderson, Atascosa, Austin, Bell, Brazos, Burleson and 36 more | 88 min |
| May 23, 11:52 PM CDT | Mesoscale Discussion | SPC | Brooks, Cameron, Duval, Hidalgo, Jim Wells, Kenedy and 3 more | 83 min |
| May 23, 11:59 PM CDT | Mesoscale Discussion | SPC | Bandera, Gillespie, Kendall, Kerr, Kinney, Real and 2 more | 91 min |
| May 24, 2:12 AM CDT | Mesoscale Discussion | SPC | Aransas, Brazoria, Calhoun, Cameron, Fort Bend, Jackson and 4 more | 93 min |
| May 24, 3:16 AM CDT | Mesoscale Discussion | SPC | Collin, Fannin, Grayson | 59 min |
| May 24, 12:05 PM CDT | Mesoscale Discussion | SPC | Bowie, Cass, Marion | 115 min |
| May 24, 12:34 PM CDT | Tornado Watch | SPC | Bowie, Cass, Morris | 6 hr |
| May 24, 3:15 PM CDT | Mesoscale Discussion | SPC | Armstrong, Briscoe, Callahan, Childress, Coleman, Collingsworth and 26 more | 90 min |
Nearby
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.