Rainfall from slow-moving thunderstorms over Logan County rapidly rushed downstream to the southeast and resulted in numerous road closures in extreme northwest Yuma county west and southwest of Clarksville. Some roads were washed out while others were temporarily impassible due to high water.
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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 GLD wrote it up.
Rainfall from slow-moving thunderstorms over Logan County rapidly rushed downstream to the southeast and resulted in numerous road closures in extreme northwest Yuma county west and southwest of Clarksville. Some roads were washed out while others were temporarily impassible due to high water.
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 Goodland, KS wrote its last area forecast discussion before the first event at Jul 20, 4:32 AM MST, 2 hours 38 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GOODLAND KS 532 AM MDT SAT JUL 20 2013 .SHORT TERM...(TODAY AND TONIGHT) ISSUED AT 320 AM MDT SAT JUL 20 2013 WEAK UPPER FLOW ACROSS THE CENTRAL HIGH PLAINS INCREASES AND BECOMES MORE NORTHWESTERLY AS THE PATTERN AMPLIFIES SLIGHTLY IN RESPONSE TO A WEAK TROUGH DEVELOPING OVER THE MISSISSIPPI VALLEY REGION BY MONDAY. TEMPERATURES OVER THE FORCAST AREA REMAIN HOT WITH THE INFLUENCE OF THE UPPER HIGH OVER THE ROCKY MOUNTAIN WEST EXTENDING IT'S INFLUENCE OVER THE HIGH PLAINS AND NEAR SURFACE FLOW REMAINING MOSTLY OUT OF THE SOUTH AHEAD OF A WEAK LEE TROUGH THAT ALSO DEVELOPS BY MONDAY. WITH DEWPOINTS REMAINING IN THE 50S AND 60S...EXPECT GOOD DAYTIME HEATING TO PRODUCE AN UNSTABLE ATMOSPHERE EACH AFTERNOON FOR THE POSSIBILITY OF ISOLATED TO SCATTERED MAINLY AFTERNOON AND EVENING THUNDERSTORMS WITH SOME STORMS POSSIBLY BECOMING SEVERE WITH LARGE HAIL AND DAMAGING WINDS. THE BETTER POSSIBILITY OF STORMS WILL BE OVER THE NORTHERN AND EASTERN SECTIONS OF THE FORECAST AREA WHERE THE GREATER AMOUNT OF MOISTURE AND INSTABILITY WILL REMAIN ALONG WITH THE CLOSER PROXIMITY OF SHORT WAVE TROUGHS RIDING THROUGH THE UPPER FLOW. .LONG TERM...(SUNDAY THROUGH FRIDAY) ISSUED AT 320 AM MDT SAT JUL 20 2013 GFS HAS TRENDED TOWARD A MORE PROGRESSIVE PATTERN IN THE EXTENDED PERIOD AND IS NOW MORE IN LINE WITH ECMWF. NORTHWESTERLY FLOW ALOFT WILL CONTINUE THROUGH WEDNESDAY AS THE UPPER RIDGE AXIS REMAINS WEST OF THE FORECAST AREA. DIFFERENCES BETWEEN GFS AND ECMWF AS WELL AS GREATER GFS ENSEMBLE SPREAD EMERGE SHORTLY THEREAFTER. GFS ENSEMBLE MEAN SHOWS MORE DEAMPLIFICATION AND A MORE ZONAL PATTERN FOR LATE WEEK WHILE ECMWF IS A LITTLE MORE AMPLIFIED WITH HIGHER HEIGHTS OVER THE FORECAST AREA. ALL SOLUTIONS SHOW A CONTINUATION OF WEAK AND DIFFICULT TO TIME SHORTWAVES PASSING THROUGH THE AREA POTENTIALLY RESULTING IN CONVECTION. THE MOST SIGNIFICANT SHORTWAVE APPEARS TO BE LATE THURSDAY INTO FRIDAY...ALTHOUGH THERE ARE DIFFERENCES IN TIMING AND STRENGTH IN THE MODELS. && .AVIATION...(FOR THE 12Z TAFS THROUGH 12Z SUNDAY MORNING) ISSUED AT 527 AM MDT SAT JUL 20 2013 VFR CONDITIONS ARE EXPECTED AT GLD AND MCK THIS AFTERNOON. THUNDERSTORMS ARE EXPECTED TO FORM LATER THIS AFTERNOON INSTABILITY INCREASES. WIDESPREAD THUNDERSTORMS ARE NOT EXPECTED SO CONFIDENCE IS NOT HIGH THAT EITHER TAF SITE WILL BE DIRECTLY IMPACTED. WIND SPEED AND DIRECTION COULD VARY CONSIDERABLY IN AND NEAR THUNDERSTORMS THIS AFTERNOON. && .GLD WATCHES/WARNINGS/ADVISORIES... KS...NONE. CO...NONE. NE...NONE. && SHORT TERM...LOCKHART LONG TERM...99 AVIATION...BRB
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GOODLAND KS 531 AM MDT SAT JUL 20 2013 COZ090>092-KSZ001>004-013>016-027>029-041-042-NEZ079>081-211645- YUMA-KIT CARSON-CHEYENNE CO-CHEYENNE KS-RAWLINS-DECATUR-NORTON- SHERMAN-THOMAS-SHERIDAN-GRAHAM-WALLACE-LOGAN-GOVE-GREELEY-WICHITA- DUNDY-HITCHCOCK-RED WILLOW- 531 AM MDT SAT JUL 20 2013 /631 AM CDT SAT JUL 20 2013/ THIS HAZARDOUS WEATHER OUTLOOK IS FOR EXTREME SOUTHWEST NEBRASKA...NORTHWEST KANSAS AND EAST CENTRAL COLORADO. .DAY ONE...TODAY AND TONIGHT ISOLATED TO SCATTERED AFTERNOON AND EVENING THUNDERSTORMS ARE EXPECTED ACROSS THE REGION WITH A SLIGHT CHANCE OF STORMS BECOMING SEVERE ACROSS SOUTHWEST NEBRASKA. DAMAGING WINDS AND LARGE HAIL WILL BE THE PRIMARY THREATS. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY THERE IS A POSSIBILITY OF ISOLATED TO SCATTERED THUNDERSTORMS DEVELOPING ACROSS THE CENTRAL HIGH PLAINS REGION EACH DAY FROM SUNDAY THROUGH FRIDAY. LARGE HAIL AND DAMAGING WINDS WILL BE THE MAIN THREATS ASSOCIATED WITH STRONGER STORMS. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE REQUIRED.
The national radar mosaic for the moment the first event began.
1 flood. Local standard time, as filed.
Numerous roads either washed out or flooded due to previous evening's rainfall upstream in Logan County. Roads most impacted were in the vicinity of Roads C to J and Roads 53 to 56 which is west and southwest of Clarksville. Damage to county roads has not been fully assessed at this time.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Colorado in 2013Every state in 2013This day in weather historyWarnings in Colorado, 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: 454383.