A large line of slow-moving thunderstorms moved east from Colorado into western Kansas. Very heavy rainfall of 3 to 5 inches occurred with several reports of flash flooding from rapid runoff.
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 GLD wrote it up.
A large line of slow-moving thunderstorms moved east from Colorado into western Kansas. Very heavy rainfall of 3 to 5 inches occurred with several reports of flash flooding from rapid runoff.
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 4, 4:22 PM MST, 4 hours 55 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GOODLAND KS 522 PM MDT SUN JUL 4 2010 .DISCUSSION... 116 PM MDT SUN JUL 4 2010 SATELLITE/RUC ANALYSIS CONTINUES TO INDICATE A DEEP MOIST PLUME EXTENDING NORTH AND EAST FROM THE SOUTHERN PLAINS ACROSS THE CENTRAL PLAINS AND INTO THE UPPER MISSISSIPPI VALLEY AREA. IN ADDITION, A SHORTWAVE TROUGH WAS TRANSLATING EAST INTO THE CENTRAL ROCKIES EARLY THIS AFTERNOON. LARGE SCALE FORCING FOR ASCENT WILL BE ON THE INCREASE ACROSS THE TRI-STATE AREA FROM WEST TO EAST AFTER 04Z-06Z WHEN PROBABILITIES FOR DEEP MOIST CONVECTION WILL INCREASE AS MID/UPPER TROUGH APPROACHES THE AREA. MORNING RAOBS ACROSS THE AREA CONTINUE TO INDICATE PWATS RUNNING IN EXCESS OF 150% OF NORMAL SUPPORTING LOCALLY HEAVY RAIN SIMILAR TO THE PAST COUPLE OF DAYS. WILL MAINTAIN MORNING PROBABILITIES WEIGHTED IN THE EASTERN ZONES BEFORE 310K ISENTROPIC DOWNGLIDE/HIGHER COND PRES DEFS TRANSLATE EAST OVER THE AREA IN THE WAKE OF THE TROUGH WITH SILENT POPS ANTICIPATED AFTER 18Z. ANOTHER FAST MOVING STORM SYSTEM DIGGING INTO THE NORTHERN INTERMOUNTAIN REGION TODAY WILL TRANSLATE EASTWARD OVER THE NORTHERN PLAINS DRIVING A COLD FRONT SOUTH ACROSS THE AREA LATE TUE. DIFFERENCES IN FROPA TIMING REMAIN, HOWEVER AGREEMENT BETWEEN GFS/NAM SUPPORT EVENING/OVERNIGHT POPS TUE LINGERING INTO WED AS THE CENTRAL HIGH PLAINS REMAINS LOOSELY IN THE RIGHT ENTRANCE REGION OF H2 JET IN MOIST EASTERLY POST-FRONTAL REGIME. THU-SUN...THE SUBTROPICAL RIDGE POSITION ACROSS THE OHIO AND TENNESSEE VALLEY AREAS IS PROGGED TO BREAK DOWN THROUGH THE PERIOD AS A SERIES OF SHORTWAVE TROUGHS TRANSLATE EAST OVER THE UPPER MISSISSIPPI VALLEY AND GREAT LAKES AREA. MEANWHILE, RISING HEIGHTS ARE PROGGED ACROSS THE SOUTHWEST, SOUTHERN ROCKIES AND PORTIONS OF THE CENTRAL GREAT BASIN AREA. THE CENTRAL HIGH PLAINS AREA WILL REMAIN ON THE SOUTHERN PERIPHERY OF THE STRONGER MID/UPPER FLOW WITH A SUBTLE FRONTAL BOUNDARY MEANDERING OVER THE REGION LEADING TO CONTINUED CHANCES FOR AFTERNOON/EVENING THUNDERSTORMS WITH SEASONABLE TEMPERATURES. && .AVIATION... 522 PM MDT SUN JUL 4 2010 FOR THE 00Z TAF...A STRONG SHORTWAVE INDICATED BY WATER VAPOR IMAGERY WILL IMPACT BOTH KGLD AND KMCK TONIGHT AND MONDAY. LOTS OF LIFT IS INDICATED FOR THUNDERSTORMS TONIGHT AND SHOWERS ON MONDAY AS THIS WAVE MOVES THROUGH. CURRENT MVFR CONDITIONS WILL CONTINUE AT KGLD WITH SOME IFR POSSIBLE ESPECIALLY EARLY MON MORNING. VFR CONDITIONS WILL CONTINUE AT KMCK UNTIL LATE TONIGHT AS SHORTWAVE STARTS IMPACTING KMCK. IFR CONDITIONS WILL OCCUR WITH THE SHOWERS AND STORMS. IMPROVING CONDITIONS TO VFR CAN BE EXPECTED MONDAY AFTERNOON AT BOTH SITES AS SHORTWAVE EXITS THE AREA. FS && .GLD WATCHES/WARNINGS/ADVISORIES... KS...NONE. NE...NONE. CO...NONE. &&
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GOODLAND KS 1050 AM MDT SUN JUL 4 2010 COZ090>092-KSZ001>004-013>016-027>029-041-042-NEZ079>081-051230- YUMA-KIT CARSON-CHEYENNE CO-CHEYENNE KS-RAWLINS-DECATUR-NORTON- SHERMAN-THOMAS-SHERIDAN-GRAHAM-WALLACE-LOGAN-GOVE-GREELEY-WICHITA- DUNDY-HITCHCOCK-RED WILLOW- 1050 AM MDT SUN JUL 4 2010 /1150 AM CDT SUN JUL 4 2010/ THIS HAZARDOUS WEATHER OUTLOOK IS FOR EXTREME SOUTHWEST NEBRASKA...NORTHWEST KANSAS AND EAST CENTRAL COLORADO. .DAY ONE...THIS AFTERNOON AND TONIGHT ISOLATED SEVERE THUNDERSTORMS ARE POSSIBLE THIS AFTERNOON AND EVENING...PRIMARILY OVER EASTERN COLORADO. LARGE HAIL...DAMAGING WINDS AND LOCALLY HEAVY RAINFALL ARE POSSIBLE. THE THREAT FOR LOCALLY HEAVY RAIN WILL INCREASE ACROSS NORTHWEST KANSAS AND SOUTHWEST NEBRASKA OVERNIGHT. SLOW STORM MOTIONS OF LESS THAN 20 MPH WILL ENHANCE THE POTENTIAL FOR LOCALIZED FLASH FLOODING. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY ANOTHER WEATHER DISTURBANCE WILL MOVE INTO THE AREA FROM THE SOUTH TUESDAY AFTERNOON AND NIGHT LEADING TO ISOLATED THUNDERSTORMS. SEVERE WEATHER IS POSSIBLE. THUNDERSTORMS REMAIN POSSIBLE EACH AFTERNOON AND EVENING FROM WEDNESDAY THROUGH SATURDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED LATE THIS AFTERNOON AND EVENING.
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GOODLAND KS
810 PM MDT SUN JUL 4 2010
COZ091-050315-
KIT CARSON COUNTY-
810 PM MDT SUN JUL 4 2010
...THE NATIONAL WEATHER SERVICE IN GOODLAND HAS ISSUED A SIGNIFICANT
WEATHER ADVISORY FOR KIT CARSON COUNTY IN EAST CENTRAL COLORADO...
AT 804 PM MDT/904 PM CDT/...NATIONAL WEATHER SERVICE DOPPLER RADAR
WAS TRACKING A SEVERE THUNDERSTORM WITH A POSSIBLE TORNADO 19 MILES
WEST OF ARRIBA...OR 30 MILES WEST OF FLAGLER...MOVING EAST AT 25 MPH.
THIS IS A DANGEROUS STORM WITH WIND GUSTS IN EXCESS OF 70
MPH...BASEBALL SIZE HAIL AND TORRENTIAL RAINFALL ALSO EXPECTED AS IT
TRACKS EAST ALONG THE INTERSTATE. IF THE STORM CAN MAINTAIN ITS
STRENGTH...IT WILL BEGIN TO IMPACT WESTERN KIT CARSON AROUND 9 PM
MDT.
PEOPLE IN WESTERN KIT CARSON COUNTY...SHOULD MONITOR THE WEATHER
SITUATION CLOSELY. A WARNING MAY BE NEEDED IF THE STORMS MOVE INTO
THE AREA. BE READY TO SEEK SHELTER IF SEVERE WEATHER THREATENS.
&&
LAT...LON 3921 10315 3952 10315 3954 10315 3957 10306
3956 10298 3948 10299 3948 10297 3945 10298
3945 10297 3944 10298 3911 10298 3904 10300
3906 10317
TIME...MOT...LOC 0209Z 271DEG 21KT 3927 10359
JRMThe Goodland radar (KGLD), 115 km away, was scanning. The volume nearest the first event began at 04:17 UTC.
2 flash flood. Local standard time, as filed.
Water running over county roads SSE of Flagler.
Water running over state highway 59 at mile marker 38 (Road R).
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Colorado in 2010Every state in 2010This day in weather historyWarnings in Colorado, July 2010
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: 235728, 235731.