Clusters of thunderstorms developed in the afternoon of July 11th. One such cluster of storms produced sub-severe winds and damaged several unhealthy trees in Trinity Park, near downtown Fort Worth.
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Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS FWD wrote it up.
Clusters of thunderstorms developed in the afternoon of July 11th. One such cluster of storms produced sub-severe winds and damaged several unhealthy trees in Trinity Park, near downtown Fort Worth.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Fort Worth, TX wrote its last area forecast discussion before the first event at Jul 11, 2:42 PM CST, 1 hour 3 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE FORT WORTH TX 342 PM CDT THU JUL 11 2013 .DISCUSSION... SCATTERED SHOWERS AND THUNDERSTORMS HAVE DEVELOPED ALONG A WEAK AND OLD FRONTAL BOUNDARY. WHILE THE SURFACE REFLECTION OF THE BOUNDARY IS NON-EXISTENT...THE FRONT REMAINS IN TACT IN THE LOWER LEVELS OF THE ATMOSPHERE NEAR 850MB AND HAS BECOME DRAPED ALONG AN AXIS FROM AMARILLO TO DFW TO CENTRAL LOUISIANA. THUNDERSTORMS ARE PRODUCING MICROBURSTS AND PUTTING OUT A LOT OF OUTFLOW WINDS TODAY...WHICH IS COOLING SOME AREAS THAT DID EVEN NOT SEE RAIN. EXPECT THE BEST COVERAGE OF STORMS THROUGH THE NEXT FEW HOURS IN THE SOUTHEAST ZONES WHERE A LINE SEGMENT NEAR TYLER SHOULD CONTINUE TO PROPAGATE SOUTHWEST. ELSEWHERE ACTIVITY WILL REMAIN ISOLATED TO SCATTERED AND CONTINUE TO RANDOMLY POP-UP THROUGH EARLY EVENING. WITH LOSS OF HEATING...ACTIVITY WILL DIMINISH THIS EVENING...BUT A FEW ELEVATED WEAK SHOWERS MAY PERSIST AFTER MIDNIGHT. THE HIGHER 850MB THETA-E VALUES ASSOCIATED WITH THE FRONT WILL CONTINUE TO MOVE SOUTHWEST OF THE AREA BY TOMORROW...AND THEREFORE MOISTURE WILL DIMINISH QUITE A BIT. WILL NOT MENTION A RISK OF CONVECTION IN THE WORDED FORECAST TOMORROW BUT KEEP POPS AT 10 PERCENT. VERY LIGHT WINDS AND LOTS OF SUNSHINE TOMORROW WILL RESULT IN ANOTHER HOT AND HUMID DAY WITH TEMPERATURES REACHING THE UPPER 90S NORTHEAST TO 104 DEGREES IN THE HOTTER PARTS OF THE CENTRAL ZONES. SLIGHTLY COOLER AND DRIER AIR WILL BE MOVING IN ON SATURDAY AS EASTERLY FLOW BECOMES ESTABLISHED IN THE LOW LEVELS. HOWEVER IT WOULD APPEAR THAT MODELS ARE A BIT AGGRESSIVE WITH THE COOLING TREND FOR SATURDAYS HIGHS AND WILL KEEP TEMPS ON THE WARM SIDE OF THE GUIDANCE. HOWEVER THE DRIER AIR WILL HELP LOWS COOL A BIT SATURDAY NIGHT WITH TEMPS DROPPING TO NEAR 70 TO THE MID 70S. MODEL GUIDANCE HAS COME INTO BETTER AGREEMENT REGARDING THE EVOLUTION OF AN UPPER LEVEL LOW THAT WILL TRACK WESTWARD INTO OUR REGION. THE MODEL GUIDANCE HAS SHIFTED QUITE A BIT WITH THIS FEATURE OVER THE LAST 24-36 HOURS AND THEREFORE CONFIDENCE IS A BIT LOWER THAN NORMAL. HOWEVER ALL MODELS AGREE THAT AS A STRONG 598DM 500MB HIGH DEVELOPS OVER THE MID-ATLANTIC STATES AND OHIO VALLEY...IT WILL PUSH THE UPPER LOW WESTWARD RATHER RAPIDLY. ALTHOUGH THE MOVEMENT OF AN UPPER LEVEL LOW AT THIS LATITUDE IS A BIT UNUSUAL...IT MAKES SENSE BECAUSE IT WILL BEHAVE SIMILARLY TO A TUTT LOW AS IT WILL BE ON THE SOUTHERN SIDE OF A STRONG SUBTROPICAL RIDGE. THERE REMAINS LOW AGREEMENT ON HOW FAST THE UPPER LOW WILL MOVE...BUT MOST GUIDANCE DOES AGREE IT WILL TRACK JUST TO OUR NORTH. THIS WILL PUT NORTH TEXAS IN A REGION OF GOOD SOUTHEASTERLY FLOW OFF OF THE GULF EARLY NEXT WEEK WHICH SHOULD INCREASE GULF MOISTURE FOR AT LEAST DAYTIME CONVECTION. SOME MODELS SUCH AS THE CANADIAN REMAIN RATHER DRY AND SOME LIKE THE ECMWF SHOW A MULTI- DAY AND POSSIBLY SIGNIFICANT RAIN EVENT. THE GFS SEEMS TO OFFER A GOOD COMPROMISE IN SPEED...POSITIONING AND STRENGTH AND WILL SHOW SLIGHT CHANCE POPS SUNDAY AFTERNOON THROUGH TUESDAY. AS WE GET BETTER MODEL AGREEMENT WE CAN INCREASE THESE IF NEED BE. CONCERNING TEMPERATURES...THE STRONGER SOUTHEASTERLY FLOW IN ALL LEVELS OF THE ATMOSPHERE WILL RESULT IN DIMINISHING THICKNESS VALUES AND COOLER HIGH TEMPERATURES. SOME OF THE MODEL GUIDANCE SEEMS UNREASONABLY COOL...BUT THE MEX MOS APPEARS MOST REASONABLE. WILL BUMP HIGH TEMPS DOWN EARLY IN THE WEEK TO LOW 90S...BUT IF A WET SOLUTION LIKE THE ECMWF VERIFIES THEN SUNDAY AND MONDAY MAY FEATURE MORE 80S. THE SOUTHEASTERLY FLOW WILL PREVAIL INTO MID-LATE WEEK AS THE SUBTROPICAL HIGH REMAINS OVER THE EASTERN US. THIS WILL KEEP TEMPS NEAR NORMAL...AND PERHAPS PROVIDE A SLIGHT CHANCE OF DIURNAL CONVECTION BUT WILL KEEP FORECAST DRY FOR NOW. TR.92 && .PRELIMINARY POINT TEMPS/POPS... DALLAS-FT. WORTH, TX 79 102 78 100 74 / 10 10 0 5 5 WACO, TX 75 103 75 102 72 / 10 10 0 5 5 PARIS, TX 75 98 69 95 69 / 10 10 0 5 5 DENTON, TX 75 100 75 99 69 / 10 10 0 5 5 MCKINNEY, TX 74 100 74 98 71 / 10 10 0 5 5 DALLAS, TX 81 103 80 101 77 / 10 10 0 5 5 TERRELL, TX 76 102 73 99 71 / 10 10 5 5 5 CORSICANA, TX 75 102 75 100 72 / 10 10 5 5 5 TEMPLE, TX 73 102 73 101 72 / 5 5 0 5 5 MINERAL WELLS, TX 74 103 73 101 70 / 10 5 0 5 5 && .FWD WATCHES/WARNINGS/ADVISORIES... NONE. &&
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE FORT WORTH TX 339 PM CDT THU JUL 11 2013 TXZ091>095-100>107-115>123-129>135-141>148-156>162-174-175-121200- MONTAGUE-COOKE-GRAYSON-FANNIN-LAMAR-YOUNG-JACK-WISE-DENTON-COLLIN- HUNT-DELTA-HOPKINS-STEPHENS-PALO PINTO-PARKER-TARRANT-DALLAS- ROCKWALL-KAUFMAN-VAN ZANDT-RAINS-EASTLAND-ERATH-HOOD-SOMERVELL- JOHNSON-ELLIS-HENDERSON-COMANCHE-MILLS-HAMILTON-BOSQUE-HILL-NAVARRO- FREESTONE-ANDERSON-LAMPASAS-CORYELL-BELL-MCLENNAN-FALLS-LIMESTONE- LEON-MILAM-ROBERTSON- 339 PM CDT THU JUL 11 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH TEXAS. .DAY ONE...TONIGHT. THERE IS A CHANCE OF THUNDERSTORMS TODAY ACROSS NORTH CENTRAL TEXAS. CLOUD TO GROUND LIGHTNING STRIKES AND STRONG AND GUSTY OUTFLOW WINDS ARE THE PRIMARY THUNDERSTORM HAZARDS. DUE TO DRY AIR AND 100 DEGREE HEAT ACROSS THE REGION...GRASS FIRE DANGER WILL BE HIGH ACROSS ALL OF NORTH TEXAS THIS AFTERNOON. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY. ISOLATED THUNDERSTORMS ARE POSSIBLE SUNDAY THROUGH TUESDAY AS AN UPPER LEVEL LOW MOVES THROUGH NORTH TEXAS. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE FORT WORTH TX
330 PM CDT THU JUL 11 2013
TXZ115-112100-
STEPHENS TX-
330 PM CDT THU JUL 11 2013
...SIGNIFICANT WEATHER ADVISORY FOR...
STEPHENS COUNTY
AT 330 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 13 MILES WEST OF
BRECKENRIDGE TO 9 MILES SOUTHWEST OF BRECKENRIDGE TO 8 MILES SOUTH OF
BRECKENRIDGE...MOVING SOUTHWEST AT 25 MPH. THE GUSTY WINDS ARE
OCCURRING WELL AHEAD OF THE RAIN. BE CAUTIOUS IF OUTSIDE.
CITIES IN THE PATH OF THESE STORMS INCLUDE BRECKENRIDGE...CRYSTAL
FALLS...GUNSIGHT AND NECESSITY.
VERY HEAVY RAIN AND WIND GUSTS TO 50 MPH ARE LIKELY WITH THESE
STORMS.
LAT...LON 3283 9910 3285 9910 3288 9906 3288 9886
3272 9867 3252 9891 3252 9910 3282 9911
TIME...MOT...LOC 2030Z 043DEG 23KT 3271 9914 3266 9904
3264 9890
HAMPSHIRESPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE FORT WORTH TX 433 PM CDT THU JUL 11 2013 TXZ103-104-112200- DENTON TX-COLLIN TX- 433 PM CDT THU JUL 11 2013 ...SIGNIFICANT WEATHER ADVISORY FOR... WESTERN COLLIN COUNTY EAST CENTRAL DENTON COUNTY AT 433 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A STRONG THUNDERSTORM NEAR PROSPER...MOVING SOUTH AT 5 MPH. CITIES IN THE PATH OF THIS STORM INCLUDE ALLEN...CELINA...FAIRVIEW... FRISCO...HACKBERRY...LITTLE ELM...MCKINNEY AND PROSPER. WIND GUSTS TO 50 MPH CAN BE EXPECTED FROM THIS STORM. IF THIS STORM CONTINUES TO INTENSIFY A SEVERE THUNDERSTORM WARNING MAY BE NEEDED. LAT...LON 3307 9658 3318 9703 3340 9684 3340 9666 TIME...MOT...LOC 2133Z 348DEG 6KT 3329 9675 DUNN
The Dallas/Ft Worth radar (KFWS), 19 km away, was scanning. The volume nearest the first event began at 21:46 UTC.
1 thunderstorm wind. Local standard time, as filed.
Multiple trees were damaged or snapped in Trinity Park in Fort Worth. A NWS damage survey team determined the winds were sub-severe as the vast majority of damage occurred to unhealthy or previously damaged trees.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Texas in 2013Every state in 2013This day in weather historyWarnings in Texas, July 2013
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 469647.