Heavy rain produced flash flooding near Granada in Prowers County. Severe thunderstorms brought hail up to golfball size during the late afternoon and early evening hours in El Paso County.
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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 PUB wrote it up.
Heavy rain produced flash flooding near Granada in Prowers County. Severe thunderstorms brought hail up to golfball size during the late afternoon and early evening hours in El Paso County.
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 Aug 22, 3:30 AM MST, 4 hours 25 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE PUEBLO CO 430 AM MDT WED AUG 22 2007 .SHORT TERM... (TODAY AND TONIGHT) PERSISTENT AREA OF STORMS EARLY THIS MORNING OVER PROWERS COUNTY...LIKELY DUE TO LOW LEVEL MOISTURE CONVERGENCE AT THE NOSE OF STRONG LOW LEVEL JET NOTED IN SOUTHEAST COLORADO. ALREADY ISSUED AN FLS FOR THE AREA...THOUGH SUSPECT RADAR RAINFALL AMOUNTS ARE OVERESTIMATED AS LOCAL SHERIFF REPORTS GOOD DEAL OF SMALL HAIL FALLING WITH THE STORMS. INTRODUCED SOME ISOLATED POPS FOR THE FAR EAST FOR EARLY THIS MORNING TO ACCOUNT FOR ONGOING PRECIP. FOR THIS AFTERNOON...SURFACE LOW SPINS UP SOUTH OF KLHX...WITH BOUNDARY LYING ACROSS THE LOWER ARKANSAS RIVER AT MIDDAY. MODELS SUGGEST BOUNDARY DRIFTS NORTHWARD DURING THE AFTERNOON...WITH CONVECTIVE INITIATION ALONG THE PALMER DIVIDE EAST INTO NW KANSAS. BOUNDARY THEN SINKS BACK SOUTH IN THE EVENING WITH HELP FROM CONVECTIVE OUTFLOW...WITH CONVECTION SPREADING SOUTH ACROSS THE PLAINS AFTER 00Z. GREATEST THREAT FOR SEVERE IN THE AFTERNOON WOULD APPEAR TO BE OVER NORTHEAST COLORADO WHERE DEEPER INSTABILITY AND SHEAR COINCIDE...THOUGH BY EVENING 30-40 KNOT 0-6KM SHEAR SPREADS SOUTH TOWARD THE NM BORDER...SO CANT RULE OUT AT LEAST SOME ISOLATED SEVERE ON THE PLAINS VERY LATE THIS AFTERNOON AND INTO THE EVENING. NICE 60 KNOT UPPER JET NOSING INTO THE AREA AS WELL SHOULD SUPPORT STORMS PAST SUNSET OVER THE FAR EAST PLAINS. CURRENT GRIDS LOOKED PRETTY GOOD...ONLY A FEW CHANGES MADE. .LONG TERM... (THURSDAY THROUGH TUESDAY) MAIN CONCERNS CONTINUE TO BE MOVEMENT OF FRONT ACROSS THE EASTERN PLAINS THURSDAY AND FRIDAY ALONG WITH SEVERE THUNDERSTORM POTENTIAL. THURSDAY-FRIDAY...MODELS IN GENERAL AGREEMENT OF SYNOPTIC FEATURES AS UPPER TROUGH CONTINUES TO MOVE ACROSS THE GREAT BASIN EARLY THURSDAY MORNING WITH COLD FRONT LYING ACROSS NORTHEASTERN COLORADO AND INTO WESTERN AND CENTRAL NEBRASKA. UPPER TROUGH PROGGED TO CONTINUE TO LIFT ACROSS THE ROCKIES THURSDAY NIGHT AND INTO THE HIGH PLAINS FRIDAY. WITH PRESSURE FALLS ACROSS THE SE PLAINS AHEAD OF TROUGH...FRONTAL BOUNDARY SHOULD SURGE ACROSS THE PALMER DVD THURSDAY AFTERNOON AND CONTINUE ACROSS THE REST OF EASTERN COLORADO THURSDAY NIGHT. WITH INCREASING UVV AHEAD OF UPPER TROUGH...ALONG WITH LOW LEVEL MOISTURE POOLING ALONG AND BEHIND FRONT...SHOULD SEE SCATTERED THUNDERSTORMS DEVELOPING ACROSS THE EASTERN PLAINS THURSDAY AFTERNOON WITH POSSIBLE MCS DEVELOPING ACROSS THE FAR SE PLAINS AND MOVING INTO WESTERN KANSAS THURSDAY NIGHT. MODELS INDICATING INCREASING SHEAR ACROSS THE PLAINS WITH 0-6KM BULK SHEARS BETWEEN 30-40KTS...ALONG WITH CAPES BETWEEN 1000-2000 J/KG SUPPORTING THE POTENTIAL FOR ROTATING STORMS WITH LARGE HAIL UP TO 2 INCHES AND STRONG WIND GUSTS AROUND 60 MPH THE MAIN THREATS. UPPER TROUGH CONTINUES TO LIFT OUT ACROSS THE NORTHERN HIGH PLAINS ON FRIDAY...THOUGH MODELS INDICATING AN EMBEDDED SHORTWAVE DIVING ACROSS THE ROCKIES...POSSIBLY AIDING IN FURTHER STORM DEVELOPMENT ACROSS THE EASTERN MTS AND PLAINS IN A COOL AND MOIST LOW LEVEL UPSLOPE REGIME. MODELS CONTINUE TO INDICATE AMPLE SHEAR AND INSTABILITY FOR A FEW STRONG TO SEVERE STORMS IF THEY CAN DEVELOP. SATURDAY-SUNDAY...DRIER AND WARMER WEST TO NORTHWEST FLOW DEVELOPS ACROSS THE REGION AS UPPER LEVEL RIDGING REBUILDS ACROSS THE REGION. HAVE TRIMMED POPS AND WARMED TEMPERATURES A TAD ACROSS THE AREA WITH H7 TEMPS PROGGED 14-18C AND NOT MUCH IN THE WAY OF AVAILABLE MOISTURE. MONDAY-TUESDAY...NO CHANGES TO CURRENT FORECAST AS MODELS CONTINUE TO INDICATE MOISTURE FROM THE REMNANTS OF HURRICANE DEAN ACROSS THE DESERT SOUTHWEST MOVING INTO THE FOUR CORNERS AND WESTERN COLORADO...WHICH COULD BRING ANOTHER INCREASE IN THUNDERSTORMS FOR THE WESTERN AREAS THROUGH EARLY NEXT WEEK...WITH ANOTHER COLD FRONT POISED TO MOVE ACROSS THE HIGH PLAINS BY MID WEEK. -MW && .AVIATION...WILL INTRODUCE A VCTS GROUP TO BOTH KCOS AND KPUB TAFS FOR THIS EVENING (23Z-03Z) WITH THE 12Z ISSUANCE...WHILE KEEPING KALS DRY. SUSPECT WELL GET SOME STRONG OUTFLOW WINDS AT BOTH KCOS AND KPUB THIS EVENING (LIKELY N-NE) EVEN IF STORMS ARE FARTHER EAST OF THE TERMINALS. WILL NEED TO BUMP UP SOUTHWEST WINDS AT KALS FOR THIS AFTERNOON WITH DEEP MIXING AND JET OVERHEAD. && .PUB WATCHES/WARNINGS/ADVISORIES... NONE. && 10/23
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE PUEBLO CO 654 AM MDT WED AUG 22 2007 COZ058>089-093>099-231300- 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- 654 AM MDT WED AUG 22 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL...EAST CENTRAL...SOUTH CENTRAL AND SOUTHEAST COLORADO. .DAY ONE...TODAY AND TONIGHT SCATTERED THUNDERSTORMS ARE EXPECTED LATE THIS AFTERNOON AND EVENING ACROSS THE FAR SOUTHEAST PLAINS. ONE OR TWO SEVERE STORMS...PRODUCING HAIL OVER 3/4 OF AN INCH IN DIAMETER AND WIND GUSTS OVER 60 MPH ARE POSSIBLE EAST OF A COLORADO SPRINGS TO LA JUNTA TO SPRINGFIELD LINE LATER THIS AFTERNOON AND EVENING. THUNDERSTORMS OVER THE EASTERN PLAINS MAY ALSO PRODUCE VERY HEAVY RAINFALL THIS EVENING...ESPECIALLY ALONG AND NORTH OF THE ARKANSAS RIVER. ISOLATED THUNDERSTORMS WILL ALSO BE POSSIBLE ACROSS MOUNTAINS AND I-25 CORRIDOR LATE THIS AFTERNOON AND EARLY EVENING. THE MAIN THREATS FROM THESE STORMS WILL BE WIND GUSTS TO 50 MPH AND CLOUD TO GROUND LIGHTNING. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY ISOLATED TO SCATTERED THUNDERSTORMS WILL BE POSSIBLE ACROSS THE REGION THURSDAY AND FRIDAY...WITH THE BEST CHANCES EXPECTED ACROSS THE EASTERN MOUNTAINS AND PLAINS...AS A COLD FRONT SLOWLY MOVES ACROSS EASTERN COLORADO. THE MAIN THREAT FROM THUNDERSTORMS WILL BE CLOUD TO GROUND LIGHTNING...WIND GUSTS TO NEAR 40 MPH...ALONG WITH SMALL HAIL AND BRIEF HEAVY RAINFALL. A FEW SEVERE STORMS WILL ALSO BE POSSIBLE ACROSS THE EASTERN PLAINS...WITH HAIL UP TO 2 INCHES IN DIAMETER AND WIND GUSTS TO OVER 60 MPH POSSIBLE. FOR SATURDAY THROUGH TUESDAY...ISOLATED THUNDERSTORMS WILL REMAIN POSSIBLE EACH AFTERNOON AND EVENING...WITH THE BEST COVERAGE EXPECTED OVER AND NEAR THE HIGHER TERRAIN. THE MAIN THREAT FROM THESE STORMS WILL BE CLOUD TO GROUND LIGHTNING AND GUSTY WINDS UP TO 35 MPH. .SPOTTER INFORMATION STATEMENT... WEATHER CONDITIONS THAT MEET REPORTING CRITERIA FOR SPOTTERS MAY BE POSSIBLE LATE THIS AFTERNOON AND EVENING OVER THE EASTERN PLAINS.
The Goodland radar (KGLD), 155 km away, was scanning. The volume nearest the first event began at 14:56 UTC.
10 hail, 1 flash flood. Local standard time, as filed.
Heavy rain from nearly stationary thunderstorms brought ponding of water over six inches deep to the Granada area in Prowers County.
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, August 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: 55762, 55753, 56840, 56841, 56843, 55755, 55757, 55758, 55760, 56844, 55761.