Flash Flood, Laramie
- When
- July 26, 5:00 PM MST to 6:00 PM MST
- Where
- Laramie County, Cheyenne
- Cause
- Heavy Rain
- Reported by
- Law Enforcement
- Coordinates
- 41.130, -104.820
Flash Flood in Wyoming, July 26, 2007
A slow moving thunderstorm produced very heavy rains over parts of Cheyenne which resulted in some flash flooding of streets and drainages.
Where it happened
Every event with a place to put it. Tap one for its entry below.
- Tornadoes
- Tropical storms and surge
- Floods
- Wind
- Hail
- Winter weather
- Heat and drought
- Cold
- Fire, smoke and dust
- Marine and coastal
- Other
The toll
- Deaths
- 0
- Injuries
- 0
- Property damage
- None recorded
- Crop damage
- None recorded
- Events
- 1
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.
What happened
The episode as NWS CYS wrote it up.
A slow moving thunderstorm produced very heavy rains over parts of Cheyenne which resulted in some flash flooding of streets and drainages.
What forecasters said that day
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 Cheyenne, WY wrote its last area forecast discussion before the first event at Jul 26, 1:07 PM MST, 3 hours 53 minutes earlier.
Area forecast discussion, Jul 26, 1:07 PM MST, 3 hours 53 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE CHEYENNE WY
ISSUED BY NATIONAL WEATHER SERVICE RAPID CITY SD
207 PM MDT THU JUL 26 2007
.SHORT TERM...THE BIG STORY IS THE COOLER WEATHER AND GOOD CHANCE
OF RAIN THE NEXT FEW DAYS...WITH THE BEST CHANCE OF RAIN COMING
TONIGHT. HAVE GONE LIKELY POPS MOST AREAS THIS EVENING TAPERING
OFF TO SCATTERED AFTER MIDNIGHT. UPPER FLOW AND FORCING ARE BOTH
RELATIVELY WEAK...BUT ABUNDANT DEEP-LAYER MOISTURE COMBINED WITH A
WEAK DISTURBANCE MOVING THROUGH THE FLOW WILL ALLOW FOR A FAIRLY
WIDESPREAD RAINFALL EVENT TONIGHT. WILL KEEP ISOLD-SCT POPS IN THE
FORECAST THROUGH FRIDAY NIGHT AS RESIDUAL MOISTURE AND UPSLOPE
FLOW PREVAIL ACROSS THE AREA. RIDGING WILL TAKE OVER SATURDAY
THROUGH SUNDAY...LEADING TO A GRADUAL WARMING TREND AND RELATIVELY
LOWER POPS. HOWEVER...INSTABILITY WILL ALSO BE RETUNING...AND HAVE
THUS KEPT SOME SMALL POPS...ESPECIALLY OVER THE MOUNTAINOUS
REGIONS.
.LONG TERM...THE FLOW WILL REMAIN WEAK MONDAY THROUGH THURSDAY...
GENERALLY IN A ZONAL TO WEST-SOUTHWEST FASHION. THE SO-CALLED
MONSOONAL MOISTURE PATTERN...AND ASSOCIATED WEAK WAVES...SHOULD
PERSIST MORE OR LESS DURING THIS PERIOD. HAVE THUS MAINTAINED THE
PROVERBIAL SMALL POPS...MAINLY DURING THE AFTERNOON AND EVENING
HOURS...WITH HIGHEST POPS CLOSEST TO THE MOUNTAINS.
&&
.AVIATION...WIDESPREAD MVFR CONDITIONS EXPECTED TO CONTINUE THROUGH
TONIGHT WITH THE MOIST ATMOSPHERE AND GENERALLY UPSLOPE FLOW.
NUMEROUS SHOWERS AND THUNDERSTORMS TONIGHT ALONG WITH FOG
DEVELOPING..WILL CREATE AREAS OF IFR CONDITIONS AFTER MIDNIGHT INTO
FRIDAY MORNING.
&&
.CYS WATCHES/WARNINGS/ADVISORIES...
WY...FLASH FLOOD WATCH UNTIL MIDNIGHT FRIDAY FOR WYZ064-WYZ066-WYZ067-
WYZ069.
NE...NONE.
&&
SHORT TERM/AVIATION...BUNKERS/SMITH
LONG TERM....BUNKERS/SMITHHazardous weather outlook, Jul 26, 9:52 AM MST, 7 hours 8 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE CHEYENNE WY ISSUED BY NATIONAL WEATHER SERVICE RAPID CITY SD 1052 AM MDT THU JUL 26 2007 WYZ064-066-067-069-271700- NORTH LARAMIE RANGE-LARAMIE RANGE-PLATTE-CHEYENNE FOOTHILLS- 1052 AM MDT THU JUL 26 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHEAST WYOMING. ...FLASH FLOOD WATCH IN EFFECT FROM 2 PM MDT THIS AFTERNOON THROUGH THIS EVENING... .DAY ONE...TODAY AND TONIGHT SCATTERED TO NUMEROUS THUNDERSTORMS WILL DEVELOP ACROSS THE AREA BY MIDDAY. DUE TO THE ABUNDANT MOISTURE AND POTENTIAL FOR SLOW MOVING STORMS...HEAVY RAINFALL IS POSSIBLE WITH ANY OF THE STRONGER STORMS...WHICH MAY RESULT IN FLASH FLOODING. SMALL HAIL AND BRIEF GUSTY WINDS ARE ALSO POSSIBLE...BUT THE THUNDERSTORMS ARE NOT EXPECTED TO BECOME SEVERE. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY THERE IS A CHANCE OF LATE DAY THUNDERSTORMS ACROSS THE AREA FRIDAY. THERE IS A SLIGHT CHANCE OF LATE DAY THUNDERSTORMS FROM SATURDAY THROUGH WEDNESDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED TODAY AND TONIGHT. && && THIS PRODUCT...ALONG WITH OTHER WEATHER...HYDROLOGIC...AND CLIMATE INFORMATION IS AVAILABLE ON THE WEB AT... HTTP://WEATHER.GOV/CHEYENNE NEZ001>003-019>021-054-055-WYZ059>063-065-068-070-271700- SIOUX-DAWES-BOX BUTTE-SCOTTS BLUFF-BANNER-MORRILL-KIMBALL- CHEYENNE-CONVERSE-NIOBRARA-SOUTHWEST CARBON-NORTH CARBON- SNOWY RANGE-LARAMIE VALLEY-GOSHEN-PINE BLUFFS- 1052 AM MDT THU JUL 26 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE WESTERN NEBRASKA PANHANDLE AND SOUTHEAST WYOMING. .DAY ONE...TODAY AND TONIGHT SCATTERED TO NUMEROUS THUNDERSTORMS WILL DEVELOP ACROSS THE AREA BY MIDDAY. DUE TO THE ABUNDANT MOISTURE AND POTENTIAL FOR SLOW MOVING STORMS...HEAVY RAINFALL IS POSSIBLE WITH ANY OF THE STRONGER STORMS. SMALL HAIL AND BRIEF GUSTY WINDS ARE ALSO POSSIBLE...BUT THE THUNDERSTORMS ARE NOT EXPECTED TO BECOME SEVERE. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY THERE IS A CHANCE OF LATE DAY THUNDERSTORMS ACROSS THE AREA FRIDAY. THERE IS A SLIGHT CHANCE OF LATE DAY THUNDERSTORMS FROM SATURDAY THROUGH WEDNESDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY AND TONIGHT. && THIS PRODUCT...ALONG WITH OTHER WEATHER...HYDROLOGIC...AND CLIMATE INFORMATION IS AVAILABLE ON THE WEB AT... HTTP://WEATHER.GOV/CHEYENNE
The radar
The Cheyenne radar (KCYS), 3 km away, was scanning. The volume nearest the first event began at 00:01 UTC.
Event by event
1 flash flood. Local standard time, as filed.
What these are
- Flash Flood
- Flooding that begins within six hours of the rain that causes it, or of a dam or levee failure or ice jam release, often with deadly speed.
After NWS Directive 10-1605, the rules offices file Storm Data by.
The same day elsewhere
- Hail and Damaging Winds in Minnesota, July 26, 2007
- Hail and Damaging Winds in Michigan, July 26, 2007
- Hail and Damaging Winds in Illinois, July 26, 2007
- Flash Flood and Damaging Wind in Indiana, July 26, 2007
- Flash Flooding and Heavy Rain in North Carolina, July 26, 2007
- Tornadoes and Hail in Indiana, July 26, 2007
- Flash Flooding and Damaging Wind in Wisconsin, July 26, 2007
- Hail and Damaging Winds in Kentucky, July 26, 2007
- Flash Flood and Hail in Wisconsin, July 26, 2007
- Damaging Wind and Lightning Strike in North Carolina, July 26, 2007
- Flash Flood in Wyoming, July 26, 2007
- Hail and Damaging Winds in West Virginia, July 26, 2007
More
Every storm in Wyoming in 2007Every state in 2007This day in weather historyWarnings in Wyoming, July 2007
Sources
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: 37060.