Scattered showers and thunderstorms developed along a surface trough across the western Oklahoma Panhandle during the early morning hours of the 20th. These storms produced an outflow boundary which moved southward across the Texas Panhandle.
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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 AMA wrote it up.
Scattered showers and thunderstorms developed along a surface trough across the western Oklahoma Panhandle during the early morning hours of the 20th. These storms produced an outflow boundary which moved southward across the Texas Panhandle. Isolated showers developed along this outflow boundary. As these storms moved into the southern Texas Panhandle, they gained access to climatologically high Precipitable Water values. This high water content allowed the storms to produce quick half to near an inch accumulations in Potter County. The outflow continued to move southward and exited the Texas Panhandle by 4 AM CST.
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 Amarillo, TX wrote its last area forecast discussion before the first event at Jul 19, 10:27 PM CST, 2 hours 40 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE AMARILLO TX 1127 PM CDT FRI JUL 19 2013 .AVIATION... VFR CONDITIONS TO PREVAIL WITH TEMPORARY LOWER CONDITIONS POSSIBLE. CONVECTION HAS BEEN SLOW TO REACH KGUY, BUT THE WESTERN EXTENT OF THE CONVECTION HAS REMAINED ON A CONSTANT SPEED. AS A RESULT THE TEMPO GROUP FROM THE 00Z TAF ISSUANCE LOOKS LIKE IT IS IN GOOD SHAPE FOR KDHT, BUT THE TEMPO GROUP FOR KGUY MAY NEED TO BE PUSHED FORWARD INTO TIME. WILL EXTENT BOTH TEMPO GROUPS UNTIL 7Z SINCE A SLOWER SPEED HAS BEEN OBSERVED. WILL CONTINUE TO HOLD OFF MENTIONING CONVECTION AT KAMA GIVEN THE SLOWER SPEED AND THE SLIGHT DECREASE IN REFLECTIVITY TRENDS. THE OTHER CONCERN DISCUSSED IN THE PREVIOUS TAF AFD IS THE CONCERN FOR LOW CLOUDS. GIVEN THE STABILIZING EFFECT BEHIND THE CONVECTION, LOW CLOUDS FOR KGUY AND KDHT SEEM LESS LIKELY. WITH THAT SAID, SATELLITE IMAGERY OVER THE PAST HOUR HAS SHOWN SOME LOW CLOUDS TRYING TO DEVELOP SOUTH OF THE TEXAS PANHANDLE. THIS WILL LEAVE IN THE POSSIBILITY THAT LOW CLOUDS COULD FORM NEAR/AT KAMA DURING THE EARLY MORNING HOURS. ANY LOW CLOUDS THAT DO FORM WILL QUICKLY DIMINISH AFTER SUNRISE. CONVECTION MAY ONCE AGAIN DEVELOP ACROSS THE NORTHWEST PANHANDLES TOMORROW AFTERNOON BUT CONFIDENCE ON TIMING AND OCCURRENCE REMAIN TO LOW TO MENTION IN THE TAF. && .PREV DISCUSSION... /ISSUED 623 PM CDT FRI JUL 19 2013/ UPDATE... VFR CONDITIONS TO PREVAIL FOR THE MAJORITY OF THIS TAF ISSUANCE. THERE WILL BE TWO MAIN AVIATION CONCERNS OVER THE NEXT 24 HOURS. THE FIRST WILL BE THE POSSIBILITY OF CONVECTION AT THE TERMINALS OVER THE FIRST FEW HOURS. A WEAK COLD FRONT IS SLOWLY MOVING TO THE SOUTH ACROSS KANSAS. THIS COULD BRING ISOLATED CONVECTION MAINLY TO KDHT AND KGUY. CONVECTION HAS STRUGGLED TO INITIATE ACROSS THE PANHANDLES THIS AFTERNOON SO IT MAY TAKE THE EXTRA FORCING PROVIDED BY THE FRONT TO BRING THIS THREAT TO KAMA. WILL GO AHEAD AND INSERT A TEMP GROUP FOR KGUY AND KDHT BUT WILL LEAVE KAMA CLEAR OF CONVECTION GIVEN THE SLOW MOVEMENT OF THE FRONT. SHOULD CONVECTION REACH THE TERMINALS THEN BRIEF MVFR TO IFR CONDITIONS COULD BE POSSIBLE. THE SECOND CONCERN WILL BE THE POTENTIAL FOR LOW CLOUDS/FOG LATE TONIGHT INTO EARLY TOMORROW MORNING AS DEPICTED IN MODEL TIME HEIGHTS. HAVE LEFT MENTION OUT OF THE TERMINALS FOR NOW GIVEN THE UNCERTAINTY ON HOW FAR SOUTH THE FRONT WILL PROGRESS BEFORE STALLING. SHOULD LOW CLOUDS/FOG DEVELOP THEN IFR CONDITIONS COULD BE POSSIBLE. PREV DISCUSSION... /ISSUED 338 PM CDT FRI JUL 19 2013/ SHORT TERM... LATEST 19Z MSAS SURFACE ANALYSIS INDICATES A SURFACE TROUGH EXTENDING FROM SOUTHWESTERN KS INTO THE OK PANHANDLE. ALTHOUGH LATEST WATER VAPOR SATELLITE IMAGERY SHOWS DRIER MID-LEVEL AIR OVER MUCH OF THE PANHANDLES...A WEAK COLD FRONT EXTENDING FROM NORTHERN KS BACK INTO NORTHEASTERN NM WILL LIKELY BE A FOCUS FOR THUNDERSTORM DEVELOPMENT THIS EVENING. HIGH-RES MODELS CAPTURE THIS THINKING AS WELL WITH STORMS EVENTUALLY MOVING SOUTHEAST INTO THE OK PANHANDLE AND THE NORTHERN TX PANHANDLE LATER TONIGHT. WEAK UPPER FLOW AND INSTABILITY WILL LIMIT THE POSSIBILITY OF SEVERE WEATHER ALTHOUGH HEAVY RAINFALL WILL BE A POSSIBILITY WITH ANY STORMS THAT DEVELOP GIVEN THE ABOVE NORMAL PWAT VALUES. THE COLD FRONT WILL STAY NORTH OF THE AMA CWA KEEPING A SOUTHWESTERLY LOW-LEVEL FLOW IN PLACE ACROSS THE PANHANDLES SATURDAY. ALTHOUGH TEMPS WILL BE SEVERAL DEGREES WARMER THAN TODAY...INCREASING CLOUD COVER ASSOCIATED WITH A WEAK VORT MAX DROPPING SOUTHEAST ACROSS THE REGION WILL PREVENT TEMPS FROM CLIMBING WELL INTO THE 90S. THIS UPPER DISTURBANCE CAN ALSO TRIGGER SCATTERED THUNDERSTORMS OVER THE OK AND NORTHERN TX PANHANDLES. AGAIN SEVERE WEATHER IS NOT ANTICIPATED GIVEN THE WEAK UPPER FLOW AND INSTABILITY. LONG TERM... HAVE NOT MADE TOO MANY CHANGES TO THE LONGER TERM FORECAST AS A BROAD UPPER RIDGE CURRENTLY OVER THE ROCKIES SLOWLY SLIDES EASTWARD INTO WEST TX EARLY NEXT WEEK. WHILE THIS WILL LEAD TO A DRY AND WARMER WX PATTERN FOR THE SOUTHERN PLAINS...ABSURDLY HOT TEMPS IN THE TRIPLE DIGITS ARE NOT ANTICIPATED OUTSIDE OF THE TYPICAL HOT SPOTS IN THE OK PANHANDLE AND NORTHEASTERN TX PANHANDLE EARLY IN THE WEEK. ISOLATED STORMS CANNOT BE RULED OUT ACROSS THE NORTHWEST ZONES WITH A WEAK NORTHWEST UPPER FLOW ALTHOUGH CHANCES IN THIS HAPPENING LOOK TOO SLIM TO MENTION IN THE FORECAST. AN UPPER TROUGH NORTH OF THE GREAT LAKES WILL SEND A COLD FRONT SOUTHWARD INTO THE CENTRAL PLAINS WEDNESDAY. MEDIUM RANGE MODELS MAINLY KEEP THIS FRONT NORTH OF THE AMA CWA ALTHOUGH THE GEM IS MORE OPTIMISTIC IN SHOVING THIS FRONT FURTHER SOUTH AND GENERATING QPF ALONG IT. HAVE OPTED TO MAINTAIN THE INHERITED DRY FORECAST AS THIS IS SEVERAL DAYS AWAY AND CONFIDENCE IS TOO LOW TO LATCH ONTO THIS SOLUTION. MEDIUM RANGE MODELS ARE HINTING AT A PATTERN CHANGE NEXT WEEKEND...PARTICULARLY THE GFS WITH AN UPPER TROUGH BREAKING DOWN THE RIDGE ALLOWING FOR THE PASSAGE OF A COLD FRONT AND INCREASING PRECIP CHANCES. WILL HAVE TO WAIT AND SEE HOW THIS UNFOLDS OVER THE NEXT SEVERAL DAYS. CLK FIRE WEATHER... RELATIVE HUMIDITY VALUES ARE EXPECTED TO GENERALLY STAY ABOVE 20 PERCENT THROUGH THE NEXT SEVERAL DAYS...PRECLUDING ELEVATED OR CRITICAL FIRE WEATHER CONDITIONS. SCATTERED THUNDERSTORMS ARE POSSIBLE TONIGHT THROUGH SATURDAY NIGHT...MAINLY ACROSS THE OK PANHANDLE AND THE NORTHERN AND WESTERN TX PANHANDLE. CLK && .AMA WATCHES/WARNINGS/ADVISORIES... TX...NONE. OK...NONE. && 14/02
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE AMARILLO TX 300 PM CDT FRI JUL 19 2013 OKZ001>003-TXZ001>020-201100- CIMARRON-TEXAS-BEAVER-DALLAM-SHERMAN-HANSFORD-OCHILTREE-LIPSCOMB- HARTLEY-MOORE-HUTCHINSON-ROBERTS-HEMPHILL-OLDHAM-POTTER-CARSON- GRAY-WHEELER-DEAF SMITH-RANDALL-ARMSTRONG-DONLEY-COLLINGSWORTH- 300 PM CDT FRI JUL 19 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE TEXAS AND OKLAHOMA PANHANDLES. .DAY ONE...TONIGHT. ISOLATED TO SCATTERED THUNDERSTORMS WILL BE POSSIBLE ACROSS THE OKLAHOMA PANHANDLE AND THE WESTERN AND NORTHERN TEXAS PANHANDLE. SEVERE STORMS ARE NOT EXPECTED ALTHOUGH LIGHTNING...STRONG GUSTY WINDS...AND LOCALLY HEAVY RAINFALL WILL BE THE PRIMARY HAZARDS. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY. THUNDERSTORMS WILL BE POSSIBLE SATURDAY AND SATURDAY NIGHT ACROSS THE OKLAHOMA PANHANDLE AND THE WESTERN AND NORTHERN TEXAS PANHANDLE. ANY STORMS THAT FORM ARE NOT EXPECTED TO BE SEVERE ALTHOUGH LIGHTNING... STRONG GUSTY WINDS...AND LOCALLY HEAVY RAINFALL WILL BE THE PRIMARY HAZARDS. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT ANTICIPATED AT THIS TIME. CLK
The national radar mosaic for the moment the first event began.
1 heavy rain. Local standard time, as filed.
An isolated thunderstorm moved over the northern half of Amarillo (Potter County). The high water content in the atmosphere allowed this storm to quickly produce 0.60 inch of rain. No flooding was reported in association with this heavy rain.
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: 468561.