A slow-moving upper level low pressure system resided in the Gulf coast for several days. A trough extended from this low pressure system into north Texas.
Every event with a place to put it. Tap one for its entry below.
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.
A slow-moving upper level low pressure system resided in the Gulf coast for several days. A trough extended from this low pressure system into north Texas. Storms developed during the afternoon hours as the atmosphere destabilized. Several hail reports were received.
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 May 13, 11:18 AM CST, 2 hours 2 minutes earlier.
AREA FORECAST DISCUSSION...UPDATED NATIONAL WEATHER SERVICE FORT WORTH TX 1218 PM CDT SUN MAY 13 2007 .AVIATION... 1218 PM UPDATED... CU FIELD CONTINUES GROWING. HAVE PUT VCTS IN METROPLEX TAFS FROM 18Z THRU 00Z AS VIS SATELLITE IS SHOWING SOME TOWERS GROWING PRETTY CLOSE TO METROPLEX AIRPORTS. CONVECTION THAT HAS POPPED UP ALREADY SHOWS NO MOVEMENT SO BOUNDARY INTERSECTIONS WILL BE LIKELY INITIATION POINTS FOR FUTURE STORMS AND IT IS IMPOSSIBLE TO PREDICT THOSE INTERSECTIONS THIS EARLY IN THE GAME. WILL GO WITH AFTN VCTS GROUP AT WACO AS WELL WITH VIS SHOWING SOME TOWERS GOING UP EAST AND WEST OF THE AIRPORT. WILL ADD MVFR VIS GROUP AT WACO AROUND SUNRISE. 84 && .UPDATE... 1033 AM MAINLY A TWEAK TO UP THE POPS ACROSS CENTRAL/SE COUNTIES TO 40 PERCENT...WITH FAR W/SW COUNTIES TO 30 PERCENT...WHILE RED RIVER AND NE COUNTIES WILL BE MORE ISOLATED THROUGH EARLY EVENING. WEAK MID LVL LOW NOTED NEAR GOLDEN TRIANGLE OF UPPER TX COAST. THIS FEATURE CONTINUES TO DRIFT SLOWLY WWD UNDERNEATH REX-BLOCK RIDGE OFF TO THE NW OF N TX. NICE PLUME OF MOISTURE SEEN ON BOTH GPS-MET AND WATER VAPOR IMAGERY THIS A.M. WE BELIEVE THAT SCT SHOWERS/STORMS WILL GET GOING AGAIN BETWEEN NOON AND 3 PM...AS DAYTIME HEATING GETS GOING. WITH THIS FEATURE CLOSER THAN YESTERDAY...MEAN STORM MOTION PER 12Z FWD SOUNDING LOOKS LGT/VRB...THAN SAY THE SW MOTION WE HAD YESTERDAY. STORMS MAY BE MORE PROPAGATION DOMINATED AND PULSE-LIKE...WITH LOCALLY HEAVY RAIN/SMALL STREAM FLOOD THREAT MORE A POSSIBILITY. ANY ACTIVITY SHOULD ONCE AGAIN DISSIPATE SHORTLY AFTER SUNSET WITH LOSS OF HEATING...THOUGH ISOLATED ACTIVITY MAY LINGER OVER FAR E/SE COUNTIES THROUGH MIDNIGHT...DUE TO PROXIMITY TO LOW CENTER. UPDATE ALREADY OUT. && .PREV DISCUSSION... /ISSUED 606 AM CDT SUN MAY 13 2007/ AVIATION... 606 AM. EXPECT TODAY TO BE SIMILAR AS SATURDAY WITH SOME SITES SEEING 4-5SM BR THIS MORNING 12-15Z. OTHERWISE...A MIDDLE LEVEL WEAKNESS LINGERS EAST TO WEST ACROSS NORTH TEXAS TODAY AND WILL RESULT IN TCU DEVELOPING BY EARLY AFTERNOON FOLLOWED BY SCATTERED AFTERNOON CONVECTION. SKIES WILL BECOME VFR AFTER 00Z. IT/S A HARD CALL AS TO WHETHER TSRA WILL HIT THE TAF SITES...THUS WILL ONLY INCLUDE BKN050CB 20-23Z. 75 PREV DISCUSSION... 401 AM. THE LOW PRESSURE CENTER THAT CAUSED ALL OF THE METEOR LOGICAL MAYHEM LAST WEEK MOVED INTO THE GULF OF MEXICO...SOUTH OF LOUISIANA SEVERAL DAYS AGO. NOW...THE SAME UPPER LOW HAS DRIFTED NORTH INTO LOUISIANA. MOREOVER...A TROUGH OF LOW PRESSURE HAS DEVELOPED WESTWARD FROM THE LOW...AND EXTENDS INTO CENTRAL PORTIONS OF NORTH TEXAS. A COMBINATION OF A MOIST AND UNSTABLE ATMOSPHERE ACROSS NORTH TEXAS...AND THE EFFECTS OF THE UPPER LEVEL LOW PRESSURE TROUGH LINE...WILL KEEP THE AREA ACTIVE WITH MAINLY AFTERNOON AND EVENING THUNDERSTORMS OVER THE NEXT FEW DAYS. BECAUSE OF THE WEAK FLOW ALOFT...MOST OF THESE STORMS WILL BE SO-CALLED SUMMER PULSE STORMS. THE TERM PULSE IS USED SINCE THESE SHORT-LIVED STORMS ARE IN AN ATMOSPHERE WITH LITTLE WIND FLOW...AND TYPICALLY WILL NOT MOVE VERY MUCH FROM THEIR INITIATION POINT. IT USUALLY IS THE COOL OUTFLOW FROM THE STORMS DOWNDRAFT THAT SPREADS AWAY FROM THE PULSE STORM...AND IN DOING SO OFTEN PRODUCES THE CONVERGENCE TO ALLOW FURTHER PULSE STORMS TO FORM. THE SAME OUTFLOW CAUSES A QUICK DEMISE OF THE INITIAL PULSE STORM. THUS...THE STORM USUALLY IS VERY SHORT LIVED...BECAUSE ITS UPDRAFT IS DESTROYED BY THE DESCENDING RAIN-COOLED AIR RATHER QUICKLY. BY LATE TUESDAY...A WEAK COOL FRONT WILL MOVE INTO NORTH TEXAS AND WEAKEN...KEEPING US IN A THUNDERSTORM MODE. THE RAIN AND STORMS SHOULD DIMINISH BY THE END OF THE WEEK. WE HAVE TWEAKED TEMPERATURES ONLY A BIT OVER THE NEXT WEEK. THERE IS MUCH UNCERTAINTY IN TEMPERATURES BECAUSE OF THE DAILY CLOUDINESS...AND RAIN-COOLED AIR ARISING FROM THE STORMS. #26 && .PRELIMINARY POINT TEMPS/POPS... DALLAS-FT. WORTH, TX 87 66 87 67 83 / 40 20 20 10 30 WACO, TX 88 64 87 64 86 / 40 20 20 20 30 PARIS, TX 87 63 86 65 81 / 20 20 20 20 30 DENTON, TX 86 63 85 63 83 / 30 20 20 10 30 MCKINNEY, TX 86 63 85 61 82 / 30 20 20 10 40 DALLAS, TX 88 68 88 68 86 / 40 20 20 10 30 TERRELL, TX 87 65 88 65 84 / 40 20 20 20 40 CORSICANA, TX 88 64 86 66 85 / 40 20 20 20 40 TEMPLE, TX 89 64 87 64 87 / 30 20 20 20 20 && .FWD WATCHES/WARNINGS/ADVISORIES... NONE. && 05/26
HAZARDOUS WEATHER OUTLOOK FOR NORTH TEXAS...UPDATED NATIONAL WEATHER SERVICE FORT WORTH TX 1046 AM CDT SUN MAY 13 2007 TXZ091>095-100>107-115>123-129>135-141>148-156>162-174-175-132300- ANDERSON-BELL-BOSQUE-COLLIN-COMANCHE-COOKE-CORYELL-DALLAS-DELTA- DENTON-EASTLAND-ELLIS-ERATH-FALLS-FANNIN-FREESTONE-GRAYSON-HAMILTON- HENDERSON-HILL-HOOD-HOPKINS-HUNT-JACK-JOHNSON-KAUFMAN-LAMAR-LAMPASAS- LEON-LIMESTONE-MCLENNAN-MILAM-MILLS-MONTAGUE-NAVARRO-PALO PINTO- PARKER-RAINS-ROBERTSON-ROCKWALL-SOMERVELL-STEPHENS-TARRANT-VAN ZANDT- WISE-YOUNG- 1046 AM CDT SUN MAY 13 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH TEXAS. .DAY ONE... THERE WILL BE SCATTERED THUNDERSTORMS ACROSS PORTIONS OF NORTH TEXAS DURING THE AFTERNOON AND EARLY EVENING HOURS. ALTHOUGH ORGANIZED SEVERE THUNDERSTORMS ARE NOT EXPECTED...THE STRONGER THUNDERSTORMS WILL PRODUCE SMALL HAIL AND GUSTY WINDS TO 40 MPH...ESPECIALLY THE ALONG AND EAST OF INTERSTATE 35 WHERE INSTABILITY IS EXPECTED TO BE HIGHER. FURTHERMORE...LOCALIZED...VERY HEAVY RAINFALL IS POSSIBLE...DUE TO VERY SLOW MOVEMENT OF ACTIVITY. THIS MAY LEAD TO MINOR FLOODING PROBLEMS. .DAYS TWO THROUGH SEVEN... THERE IS A CHANCE OF THUNDERSTORMS ACROSS ALL OF NORTH TEXAS MONDAY THROUGH WEDNESDAY. NO ORGANIZED SEVERE THUNDERSTORMS ARE EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT ANTICIPATED THROUGH TONIGHT.
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE FORT WORTH TX
1254 PM CDT SUN MAY 13 2007
TXZ143-157-131830-
HAMILTON TX-CORYELL TX-
1254 PM CDT SUN MAY 13 2007
...SIGNIFICANT WEATHER ADVISORY FOR...
NORTHEASTERN CORYELL COUNTY
EAST CENTRAL HAMILTON COUNTY
AT 1254 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 17 MILES NORTHEAST
OF HAMILTON TO 14 MILES SOUTHEAST OF HAMILTON TO 7 MILES SOUTHEAST OF
GATESVILLE...STATIONARY.
CITIES IN THE PATH OF THESE STORMS INCLUDE CRANFILLS GAP...FORT GATES
AND GATESVILLE.
PEA-SIZED HAIL AND WIND GUSTS TO 40 MPH CAN BE EXPECTED FROM THESE
STORMS.
HEAVY RAINFALL FROM STORMS THAT ARE NOT MOVING MAY RESULT IN
FLOODING OF LOW LYING AREAS SUCH AS DITCHES AND UNDERPASSES. AVOID
THESE AREAS AND DO NOT CROSS FLOODED ROADS AS THEY MAY BE WASHED OUT.
LAT...LON 3190 9782 3160 9778 3138 9755 3137 9770
3167 9804 3190 9801
77/TDThe Ft Hood radar (KGRK), 46 km away, was scanning. The volume nearest the first event began at 19:20 UTC.
5 hail. Local standard time, as filed.
Penny to nickel-size hail fell from Morgan's Point Resort to White Hall.
Reported near the Hood/Johnson county line.
Penny-size hail reported in Oak Trail Shores.
Nickel-size hail reported in The Colony.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Texas in 2007Every state in 2007This day in weather historyWarnings in Texas, May 2007
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: 31902, 31904, 31899, 31901, 31900.