Heavy thunderstorm rains of up to 3 inches produced severe mud flows over sections of county roads 162 and 292 in Chalk Creek Canyon. The Alpine subdivision was in the path of the worst mudflow, where mandatory evacuations occurred.
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 PUB wrote it up.
Heavy thunderstorm rains of up to 3 inches produced severe mud flows over sections of county roads 162 and 292 in Chalk Creek Canyon. The Alpine subdivision was in the path of the worst mudflow, where mandatory evacuations occurred. More than 30 houses and over 100 people were evacuated, as mud and boulders as deep as 8 feet moved down the mountain side. At least 15 houses were damaged, along with landscaping and vehicles.
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 Pueblo, CO wrote its last area forecast discussion before the first event at Jul 21, 2:11 PM MST, 6 hours 29 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE PUEBLO CO 311 PM MDT SAT JUL 21 2007 .SHORT TERM... (TONIGHT AND SUNDAY) HIGH PRESSURE REMAINS OVER THE REGION WITH WATER VAPOR IMAGERY SHOWING A WESTWARD PUSH OF DRIER AIR. WEAK UPPER LOW/VORT MAX TRAPPED WITHIN THE RIDGE SUPPORTING THUNDERSTORMS THAT FORMED ON THE WESTERN EDGE OF THE DRIER AIR AS IT MOVED OVER THE MOUNTAINS. STORMS WERE SHORT LIVED AND PROPAGATED TO THE WEST. ALSO SEE A PLUME OF MOISTURE ALONG THE SOUTHERN COLORADO BORDER DRIFTING TO THE WEST. STORMS FORMED OVER THE MOUNTAINS ASSOCIATED WITH THE PLUME. STORMS SHOULD REMAIN OVER THE HIGH TERRAIN AND WEAKEN QUICKLY WITH SUNSET. WRF MODEL SUGGESTS THAT THE WEAK UPPER LOW WILL MOVE TO THE WEST AND CEASE TO BE A PLAYER OVERNIGHT. LOTS OF THOSE TYPES OF IMPULSES EMBEDDED IN THE FLOW AROUND THE UPPER HIGH AS IT REFORMS TO OUR NORTH AND WITH EASTERLY FLOW ALOFT WE WILL PROBABLY SEE ANOTHER ONE INTERACT WITH THE TERRAIN ON SUNDAY. MOISTURE WILL BE MORE LIMITED ON SUNDAY AND SO ONLY ISOLATED THUNDERSTORMS EXPECTED OVER THE MOUNTAIN AREAS AND NONE OVER THE EASTERN PLAINS. NO NEED TO MAKE MUCH CHANGE TO THE GRIDS WITH THIS TYPE OF PATTERN. .LONG TERM... (SUNDAY NIGHT THROUGH SATURDAY) SUNDAY NIGHT-MONDAY NIGHT...LARGE UPPER RIDGE OF HIGH PRESSURE ACROSS THE DESERT SW THROUGH THE HIGH PLAINS STATES REMAINS IN PLACE WITH CENTER OF HIGH ACROSS WESTERN WYOMING KEEPING GENERALLY WEAK EASTERLY FLOW ALOFT ACROSS THE REGION THROUGH THESE PERIOD. LATEST MODELS INDICATING DRIER AIR IN THE EASTERN FLOW ALOFT MOVING ACROSS EASTERN COLORADO WITH BULK OF MID AND UPPER LEVEL MOISTURE PLUME ACROSS SOUTHWESTERN TEXAS AND NEW MEXICO ATTM MOVING ACROSS ARIZONA...UTAH AND EXTREME WESTERN COLORADO. MODELS ALSO INDICATING A MINOR PV LOBES ROTATING AROUND THE PERIPHERY ACROSS THE NORTHERN AND CENTRAL HIGH PLAINS. AT ANY RATE...WITH THE EASTERLY FLOW AND STRONG SOLAR HEATING...HAVE KEPT ISOLATED TO SCATTERED DIURNAL POPS IN PLACE ACROSS THE MOUNTAINS AND HIGH MOUNTAIN VALLEYS WITH BEST POPS REMAINING ACROSS THE SW AND CENTRAL MOUNTAINS. MODEL SOUNDINGS INDICATING CAP REMAINING IN PLACE ACROSS THE EASTERN PLAINS AND THOUGH WITH POSSIBLE MINOR DISTURBANCE LURKING AROUND THE REGION AND CAPE VALUES PROGGED BETWEEN 500-1500 J/KG...HAVE KEPT SILENT POPS IN PLACE ATTM. HAVE STAYED CLOSER TO COOLER SIDE OF GUIDANCE WITH HIGHS IN THE 90S ACROSS THE PLAINS...AND GENERALLY 60S TO 80S MOUNTAINS AND HIGH VALLEYS. TUESDAY-WEDNESDAY...LATEST GFS INDICATING CENTER OF UPPER HIGH SLIDING SOUTH AND WEST ACROSS EASTERN UTAH AS PAC NORTHWEST SHORT WAVES MOVE ACROSS THE NORTHERN TIER OF STATES. WITH SOME MOISTURE REMAINING IN THE NORTHERLY FLOW ALOFT...SHOULD CONTINUE TO SEE ISOLATED TO SCATTERED MAINLY DIURNAL SHOWERS AND THUNDERSTORMS ACROSS THE MOUNTAINS AND HIGH VALLEYS...WITH MAINLY WARM AND DRY CONDITIONS PERSISTING ACROSS THE EASTERN PLAINS. THURSDAY-SATURDAY...WEAK NORTHERLY FLOW ALOFT LOOKS TO PERSIST AS UPPER RIDGING REMAINS ACROSS DESERT SW THROUGH WESTERN WYOMING...KEEPING ISOLATED TO SCATTERED POPS IN PLACE ACROSS WESTERN PORTIONS OF THE AREA. MODELS INDICATING A WEAK FRONT SLIDING ACROSS THE HIGH PLAINS THURSDAY...WHICH MOVES ACROSS EASTERN COLORADO ON FRIDAY...ALLOWING FOR BETTER CHANCES OF THUNDERSTORMS ACROSS EASTERN PORTIONS OF THE AREA. TEMPERATURE TO BE AT OR ABOVE SEASONAL AVERAGES THROUGH THE PERIOD. -MW && .AVIATION...AFTER SUNSET CLOUDS SHOULD DIMINISH QUICKLY. MOST AREAS WILL SEE A TYPICAL DIURNAL DRAINAGE WIND PATTERN WITH LITTLE OR NO IMPACT TO AVIATION. THE EXCEPTION WOULD BE ALONG THE SOUTHERN COLORADO BORDER WHERE IMPULSES CONTINUE TO TRAVEL FROM EAST TO WEST WITHIN THE MOIST PLUME. STORMS MAY BE A LITTLE SLOWER TO DIMINISH OVERNIGHT. SHOULD SEE LESS THUNDERSTORM COVERAGE ON SUNDAY. && .PUB WATCHES/WARNINGS/ADVISORIES... NONE. && 21/23
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE PUEBLO CO 650 AM MDT SAT JUL 21 2007 COZ058>089-093>099-221300- WESTERN MOSQUITO RANGE/EAST LAKE COUNTY ABOVE 11000 FT- LEADVILLE VICINITY/LAKE COUNTY BELOW 11000 FT- EASTERN SAWATCH MOUNTAINS ABOVE 11000 FT- WESTERN CHAFFEE COUNTY BETWEEN 9000 AND 11000 FT- CENTRAL CHAFFEE COUNTY BELOW 9000 FT- WESTERN MOSQUITO RANGE/EAST CHAFFEE COUNTY ABOVE 9000 FT- SAGUACHE COUNTY WEST OF CONTINENTAL DIVIDE BELOW 10000 FT- SAGUACHE COUNTY EAST OF CONTINENTAL DIVIDE BELOW 10000 FT- LA GARITA MOUNTAINS ABOVE 10000 FT- UPPER RIO GRANDE VALLEY/EASTERN SAN JUAN MOUNTAINS BELOW 10000 FT- EASTERN SAN JUAN MOUNTAINS ABOVE 10000 FT- DEL NORTE VICINITY/NORTHERN SAN LUIS VALLEY BELOW 8500 FT- ALAMOSA VICINITY/CENTRAL SAN LUIS VALLEY BELOW 8500 FT- SOUTHERN SAN LUIS VALLEY- NORTHERN SANGRE DE CRISTO MOUNTAINS BETWEEN 8500 AND 11000 FT- NORTHERN SANGRE DE CRISTO MOUNTAINS ABOVE 11000 FEET- SOUTHERN SANGRE DE CRISTO MOUNTAINS BETWEEN 7500 AND 11000 FT- SOUTHERN SANGRE DE CRISTO MOUNTAINS ABOVE 11000 FT- NORTHWESTERN FREMONT COUNTY ABOVE 8500 FT- WESTERN/CENTRAL FREMONT COUNTY BELOW 8500 FT- WET MOUNTAIN VALLEY BELOW 8500 FEET- WET MOUNTAINS BETWEEN 6300 AND 10000 FT- WET MOUNTAINS ABOVE 10000 FT- TELLER COUNTY/RAMPART RANGE ABOVE 7500 FT/PIKES PEAK BETWEEN 7500 AND 11000 FT-PIKES PEAK ABOVE 11000 FT- CANON CITY VICINITY/EASTERN FREMONT COUNTY- NORTHERN EL PASO COUNTY/MONUMENT RIDGE/RAMPART RANGE BELOW 7500 FT- COLORADO SPRINGS VICINITY/SOUTHERN EL PASO COUNTY/RAMPART RANGE BELOW 7400 FT-PUEBLO AND VICINITY/PUEBLO COUNTY BELOW 6300 FT- WALSENBURG VICINITY/UPPER HUERFANO RIVER BASIN BELOW 7500 FT- TRINIDAD VICINITY/WESTERN LAS ANIMAS COUNTY BELOW 7500 FT- CROWLEY COUNTY-LA JUNTA VICINITY/OTERO COUNTY- EASTERN LAS ANIMAS COUNTY-WESTERN KIOWA COUNTY- EASTERN KIOWA COUNTY-LAS ANIMAS VICINITY/BENT COUNTY- LAMAR VICINITY/PROWERS COUNTY-SPRINGFIELD VICINITY/BACA COUNTY- 650 AM MDT SAT JUL 21 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL...EAST CENTRAL...SOUTH CENTRAL AND SOUTHEAST COLORADO. .DAY ONE...TODAY AND TONIGHT ISOLATED TO NUMEROUS THUNDERSTORMS ARE EXPECTED THIS AFTERNOON AND EVENING...MAINLY OVER THE MOUNTAINS AND HIGH PLAINS. OVER THE EASTERN SAN JUAN...LA GARITA...AND EASTERN SAWATCH RANGES...A FEW STORMS MAY PRODUCE SOME LOCALLY HEAVY RAINFALL. OTHERWISE...THE MAIN THREAT FROM THESE STORMS WILL BE CLOUD TO GROUND LIGHTNING. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY ISOLATED TO SCATTERED THUNDERSTORMS WILL BE POSSIBLE EACH AFTERNOON AND EVENING...MAINLY WEST OF THE INTERSTATE 25 CORRIDOR. THE MAIN THREATS WILL BE CLOUD TO GROUND LIGHTNING...LOCALLY HEAVY RAINFALL...AND LOCALLY GUSTY WINDS TO 50 MPH. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS WILL NOT BE NEEDED TODAY OR TONIGHT.
The Grand Junction radar (KGJX), 171 km away, was scanning. The volume nearest the first event began at 03:41 UTC.
1 flash flood. Local standard time, as filed.
Heavy thunderstorm rains of up to 3 inches in a short period of time produced severe mudslides in the Alpine area.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Colorado in 2007Every state in 2007This day in weather historyWarnings in Colorado, July 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: 46400.