Alert archive / Wyoming / Flash Flood Warnings in 2014
Flash Flood Warning 10, NWS Cheyenne, WY
NWS Cheyenne, WY issued this flash flood warning at May 26, 2014, 4:06 PM MDT for Laramie County, Wyoming. It was in force for 6 hr. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- May 26, 2014, 4:06 PM MDT (22:06 UTC)
- Expired
- May 26, 2014, 10:00 PM MDT
- In force
- 6 hr
- Issued by
- NWS Cheyenne, WY
- Area
- Storm-based polygon
- Flood severity
- None
County Laramie County, WY
The radar
The Cheyenne radar (KCYS), 61 km from the middle of the area, began a volume at 22:06 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
Did it verify
Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this flash flood warning while it was in force. That is not proof nothing happened: reports are thin where few people live.
Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.
The nearest sounding before it
Denver, CO (KDEN), launched 12:00Z, 10.1 hours before the alert went out and 180 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 52 J/kg
- Mixed-layer CIN
- -125 J/kg
- Mixed-layer LCL
- 1083 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- -6 m²/s²
- 0-3 km storm-relative helicity
- 37 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.2
The text
As transmitted, in the capitals the NWS used until 2016.
568
WGUS55 KCYS 262206
FFWCYS
WYC021-270400-
/O.NEW.KCYS.FF.W.0010.140526T2206Z-140527T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE CHEYENNE WY
406 PM MDT MON MAY 26 2014
THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A
* FLASH FLOOD WARNING FOR...
EAST CENTRAL LARAMIE COUNTY IN SOUTHEAST WYOMING...
* UNTIL 1000 PM MDT
* AT 359 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE
WARNED AREA. DOPPLER RADAR WAS ESTIMATING RAINFALL AMOUNTS
BETWEEN 1 AND 2 INCHES DURING THE LAST HOUR. ADDITIONAL RAINFALL
AMOUNTS UP TO ONE INCH WILL BE POSSIBLE DURING THE NEXT HOUR OR
TWO.
* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR ESPECIALLY AREAS NEAR THE CHIVINGTON DRAW AND ANTELOPE DRAW.
THOSE LIVING IN THESE AREAS WILL NEED TO WATCH FOR RISING WATER
LEVELS.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE
BANKS OF CREEKS AND STREAMS.
&&
LAT...LON 4135 10408 4128 10405 4125 10418 4137 10425
4142 10411
$$
COX1 follow-up statement
225
WGUS75 KCYS 270320
FFSCYS
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
920 PM MDT MON MAY 26 2014
WYC021-270335-
/O.CAN.KCYS.FF.W.0010.000000T0000Z-140527T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
LARAMIE WY-
920 PM MDT MON MAY 26 2014
...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR EAST CENTRAL
LARAMIE COUNTY IS CANCELLED...
EXCESS RUNOFF FROM HEAVY RAIN HAS ENDED OVER THE WARNED AREA. STREAMS
AND CREEKS IN THE WARNED AREA HAVE RECEDED OR WERE BEGINNING TO
RECEDE...ENDING THE FLOOD THREAT. IF FLOODING HAS BEEN OBSERVED...
PLEASE REPORT IT TO YOUR LOCAL LAW ENFORCEMENT AGENCY.
LAT...LON 4135 10408 4128 10405 4125 10418 4137 10425
4142 10411
$$
COXWhat forecasters said that day
The local office's own words before this flash flood warning went out, 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 this flash flood warning went out at May 26, 3:21 PM MDT, 45 minutes earlier.
Area forecast discussion, May 26, 3:21 PM MDT, 45 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE CHEYENNE WY
321 PM MDT MON MAY 26 2014
.SHORT TERM...(THIS EVENING THROUGH WEDNESDAY NIGHT)
ISSUED AT 320 PM MDT MON MAY 26 2014
IN THE VERY NEAR TERM...MAIN CONCERNS ARE WITH TRAINING
THUNDERSTORMS PRODUCING HEAVY RAINS OVER 2 INCHES FROM CHEYENNE
EAST INTO THE SOUTHERN NEBRASKA PANHANDLE. ENVIRONMENT IN
NORTHWESTERLY MIDLEVEL FLOW PATTERN IS CONDUCIVE FOR STORMS TO
REGENERATE TO THE NORTH FOR THE NEXT FEW HOURS. MODERATELY
UNSTABLE AIRMASS IN PLACE REGION-WIDE (MUCAPES AROUND 1000 J/KG)
WITH MOSTLY ISOLATED STORMS EXPECTED THROUGH SUNSET IN THE
NORTHERN AND WESTERN ZONES. STORMS WILL CONTINUE TO BE A LITTLE
MORE NUMEROUS IN THE REGION OF BEST INSTABILITY (MUCAPES 1200-1500
J/KG) SOUTHEAST OF A LARAMIE...TO SCOTTSBLUFF TO CHADRON LINE. WE
CURRENTLY HAVE FLASH FLOOD WARNINGS ONGOING IN PORTIONS OF KIMBALL
AND CHEYENNE COUNTIES OF NEBRASKA WHERE STORMS CONTINUE TO
BACK BUILD AND TRAIN OVER THE SAME AREAS. EXPECT THE COVERAGE OF
STORMS TO TO START DIMINISHING SHORTLY AFTER SUNSET WITH DECREASED
INSTABILITY. 18Z HRRR SHOWS CONVECTION IN THE SOUTHEASTERN
FORECAST AREA DIMINISHING AFTER 01Z...BUT HANGS ON TO SCATTERED
CONVECTION TO THE NORTHWEST COMING OUT OF THE CASPER AREA. PROBLEM
IS...HRRR HAS BEEN OVER-FORECASTING CONVECTION TO THE NORTHWEST
TODAY SO FOR NOW WILL HAVE SLIGHT POPS IN THE HIGHER TERRAIN OVER
THE NORTHWESTERN ZONES THROUGH MID EVENING.
AS THE UPPER LOW OVER THE TEXAS PANHANDLE THIS EVENING PUSHES
FARTHER TO THE EAST THROUGH TOMORROW...DEEP LAYERED DRYSLOT (AS
NOTED IN WATER VAPOR IMAGERY EXTENDING FROM CALIFORNIA TO UTAH)
WILL SHIFT EAST ACROSS OUR FORECAST AREA TUESDAY THROUGH
WEDNESDAY. THIS WILL RESULT IN SIGNIFICANTLY DIMINISHED POPS
TUESDAY THROUGH WEDNESDAY WITH SMALL POTENTIAL FOR STORMS IN THE
MOUNTAINS. WITH DEEPLY SUBSIDENT AIRMASS IN PLACE TUESDAY THROUGH
WEDNESDAY...WE HAVE GONE A FEW DEGREES ABOVE MODEL GUIDANCE ON
HIGH TEMPERATURES FOR THE MIDWEEK TIMEFRAME WITH LOWER TO MAYBE
EVEN A FEW MID 90S POSSIBLE SOME AREAS IN THE NEBRASKA PANHANDLE
BY WEDNESDAY...WITH MID TO UPPER 80S IN THE LOWER ELEVATIONS IN
SOUTHEAST WYOMING. THIS WILL ACCELERATE THE SNOWMELT PROCESS
ABOVE 9000 FT...AND WILL CAUSE RISES AND AN INCREASED FLOOD THREAT
ON SOME RIVERS IN THE WEST (PLEASE REFER TO THE HYDROLOGIC
DISCUSSION SECTION IN THIS PRODUCT FOR MORE DETAILED INFORMATION).
.LONG TERM...(THURSDAY THROUGH MONDAY)
ISSUED AT 320 PM MDT MON MAY 26 2014
UNSETTLED WEATHER RETURNS IN THE LONG TERM. FORECAST CHALLENGES
DEAL WITH PRECIP COVERAGE.
FOR THURSDAY...UPPER RIDGE BEGINS TO MOVE EAST INTO THE CENTRAL
PLAINS AND A LONG WAVE TROUGH DEVELOPS OVER THE WEST COAST.
SOUTHWESTERLY FLOW BEGINS TO PULL UP SOME SUBTROPICAL MOISTURE
FROM THE DESERT SOUTHWEST. INITIALLY...IT LOOKS LIKE OUR WESTERN
ZONES WILL SEE THE CONVECTION THURSDAY AFTERNOON. ALL THREE MODELS
ARE SHOWING SOME SHOWER ACTIVITY OUT WEST. ECMWF MOST BULLISH ON
QPF WITH THE GFS KEEPING THIS RAINFALL MAINLY OVER WESTERN
COLORADO.
PWATS CONTINUE TO INCREASE INTO FRIDAY AS THE SUBTROPICAL MOISTURE
TAP GETS GOING. ECMWF HAS SHOWERS EXTENDING FROM ARIZONA ALL THE
WAY UP INTO WESTERN SOUTH DAKOTA FRIDAY. GFS PWATS OVER RAWLINS
INCREASES FROM ROUGHLY .45 INCHES TO OVER .60 INCHES BY FRIDAY.
ECMWF SHOWING WIDESPREAD MODERATE PRECIP OVER THE CWFA FRIDAY
NIGHT INTO SATURDAY ACROSS MUCH OF THE AREA.
&&
.AVIATION...(FOR THE 18Z TAFS THROUGH 18Z TUESDAY MORNING)
ISSUED AT 1124 AM MDT MON MAY 26 2014
MODERATE CU DEVELOPMENT ALREADY THIS MORNING. DECIDED TO START
TSTMS EARLIER HERE AT KCYS. LATEST HRRR GUIDANCE SHOWING
CONVECTION BLOOMING OUT IN THE PANHANDLE AROUND THE 21Z TIME FRAME
AND PERSISTING THROUGH 01Z OR SO. WEST WINDS TO CONTINUE
TONIGHT...THAT SHOULD LIMIT STRATUS DEVELOPMENT IN THE PANHANDLE.
&&
.FIRE WEATHER...
ISSUED AT 320 PM MDT MON MAY 26 2014
MINIMAL FIRE WEATHER CONCERNS THROUGH TUESDAY. FUELS CONTINUE
TO BE IN GREEN UP AND SOME AREAS HAVE SEEN SIGNIFICANT RAINFALL
OVER THE PAST FEW DAYS. WARMER AND DRIER CONDITIONS ARE EXPECTED
WEDNESDAY THROUGH LATE THIS WEEK AS HIGH PRESSURE STRENGTHENS OVER
THE CENTRAL PLAINS INCREASING THE SOUTHERLY WINDS OVER WYOMING
AND NEBRASKA. NEAR-CRITICAL CONDITIONS ARE POSSIBLE MID TO LATE
WEEK AS AFTERNOON HUMIDITY VALUES FALL BELOW 15 PERCENT WITH
GUSTY WINDS EXPECTED OVER THE HIGHER ELEVATIONS. CHANCES OF
SHOWERS AND THUNDERSTORMS WILL INCREASE FRIDAY INTO SATURDAY.
&&
.HYDROLOGY...
ISSUED AT 320 PM MDT MON MAY 26 2014
VERY WARM TEMPERATURES CONTINUE TO BE FORECAST ACROSS THE AREA
THIS WEEK AS SOUTHWEST WINDS RETURN AND AN UPPER LEVEL RIDGE OF
HIGH PRESSURE BUILDS INTO THE AREA. THESE WARMER TEMPERATURES WILL
CONTINUE TO EAT AWAY AT THE DEEP SNOW PACK OVER THE SNOWY AND
SIERRA MADRE RANGES. RIVERS ARE ON THE RISE AND WILL CONTINUE TO
DO SO OVER THE NEXT SEVERAL DAYS...WITH SOME GAGE SITES EXPECTED
TO REACH MODERATE FLOOD STAGE WITHIN THE NEXT 3 TO 5 DAYS. THE RIVER
FLOOD WATCH WILL BE ALLOWED TO EXPIRE THIS AFTERNOON SINCE MOST
GAUGE SITES ARE NOW IN FLOOD WARNINGS. WIDESPREAD AND SIGNIFICANT
RAINFALL LOOKS TO RETURN TO THE AREA BY THE END OF THE WEEK. WE
COULD BE LOOKING AT ANOTHER RAIN ON SNOW EVENT FRIDAY INTO THE
WEEKEND.
&&
.CYS WATCHES/WARNINGS/ADVISORIES...
WY...FLOOD WATCH UNTIL 6 PM MDT THIS EVENING FOR WYZ105-109-110-113-
115.
NE...NONE.
&&
SHORT TERM...GARMON
LONG TERM...CLAYCOMB
AVIATION...CLAYCOMB
FIRE WEATHER...GARMON
HYDROLOGY...CLAYCOMBHazardous weather outlook, May 26, 4:36 AM MDT, 11 hours 30 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE CHEYENNE WY 436 AM MDT MON MAY 26 2014 NEZ002-003-019>021-054-055-095-096-WYZ101-102-107-108-118-119- 271045- DAWES-BOX BUTTE-SCOTTS BLUFF-BANNER-MORRILL-KIMBALL-CHEYENNE- NORTH SIOUX-SOUTH SIOUX-CONVERSE COUNTY LOWER ELEVATIONS- NIOBRARA COUNTY-EAST PLATTE COUNTY-GOSHEN COUNTY- CENTRAL LARAMIE COUNTY-EAST LARAMIE COUNTY- 436 AM MDT MON MAY 26 2014 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE WESTERN NEBRASKA PANHANDLE...SOUTHEAST WYOMING. .DAY ONE...TODAY AND TONIGHT ISOLATED TO WIDELY SCATTERED SHOWERS AND STORMS ARE EXPECTED OVER SOUTHEAST WYOMING AND THE SOUTHERN NEBRASKA PANHANDLE DURING THE AFTERNOON AND EARLY EVENING. THESE STORMS ARE NOT EXPECTED TO BE SEVERE...HOWEVER BRIEF HEAVY RAIN AND SMALL HAIL WILL BE POSSIBLE WITH THE STRONGER ACTIVITY. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY ISOLATED THUNDERSTORMS WILL BE POSSIBLE EACH AFTERNOON. THE BEST CHANCE WILL BE THURSDAY THROUGH THE WEEKEND. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED. && THIS PRODUCT...ALONG WITH OTHER WEATHER...HYDROLOGIC...AND CLIMATE INFORMATION IS AVAILABLE ON THE WEB AT... HTTP://WEATHER.GOV/CHEYENNE WYZ103>106-109>117-271045- NORTH LARAMIE RANGE-FERRIS/SEMINOE/SHIRLEY MOUNTAINS- SHIRLEY BASIN-CENTRAL LARAMIE RANGE AND SOUTHWEST PLATTE COUNTY- CENTRAL CARBON COUNTY-NORTH SNOWY RANGE FOOTHILLS- SOUTHWEST CARBON COUNTY-SIERRA MADRE RANGE- UPPER NORTH PLATTE RIVER BASIN-SNOWY RANGE-LARAMIE VALLEY- SOUTH LARAMIE RANGE-SOUTH LARAMIE RANGE FOOTHILLS- 436 AM MDT MON MAY 26 2014 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL WYOMING... SOUTH CENTRAL WYOMING AND SOUTHEAST WYOMING. .DAY ONE...TODAY AND TONIGHT SNOWMELT FROM THE MOUNTAINS WILL CONTINUE TO PRODUCE SOME RIVER FLOODING. SEE THE LATEST RIVER FLOOD STATEMENTS FOR THE LATEST INFORMATION. THOSE WITH RECREATIONAL INTERESTS ARE ENCOURAGED TO MONITOR THE LATEST FORECASTS AND ADJUST PLANS ACCORDINGLY. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY ISOLATED THUNDERSTORMS WILL BE POSSIBLE EACH AFTERNOON. THE BEST CHANCE WILL BE THURSDAY THROUGH THE WEEKEND. .SPOTTER INFORMATION STATEMENT... SPOTTERS ARE ENCOURAGED TO REPORT FLOODING OR ANY NOTABLE RISES IN RIVER OR STREAM LEVELS. && THIS PRODUCT...ALONG WITH OTHER WEATHER...HYDROLOGIC...AND CLIMATE INFORMATION IS AVAILABLE ON THE WEB AT... HTTP://WEATHER.GOV/CHEYENNE HAMMER
In the hours before
Special weather statement, May 26, 2:33 PM MDT, 1 hour 33 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 233 PM MDT MON MAY 26 2014 NEZ054-262130- KIMBALL NE- 233 PM MDT MON MAY 26 2014 ...SIGNIFICANT WEATHER ADVISORY FOR EASTERN KIMBALL COUNTY UNTIL 330 PM MDT... AT 228 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR DIX...OR 7 MILES EAST OF KIMBALL...NEARLY STATIONARY. HAIL UP TO ONE-HALF INCH IN DIAMETER IS EXPECTED WITH THIS STORM...ALONG WITH TORRENTIAL RAINFALL WHICH MAY CAUSE LOCALIZED FLOODING. LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE... MAINLY RURAL AREAS OF EASTERN KIMBALL COUNTY. THIS INCLUDES INTERSTATE 80 IN NEBRASKA BETWEEN MILE MARKERS 25 AND 33. THIS STORM MAY INTENSIFY...SO BE CERTAIN TO MONITOR LOCAL RADIO AND TV STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS... FOR ADDITIONAL INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE. TORRENTIAL RAIN...WHICH MAY FLOOD LOW LYING AREAS SUCH AS DITCHES AND UNDERPASSES...IS ALSO LIKELY. DO NOT DRIVE YOUR VEHICLE ON A FLOODED ROADWAY. && LAT...LON 4129 10359 4129 10337 4118 10343 4117 10358 TIME...MOT...LOC 2031Z 150DEG 7KT 4124 10352 COX
Special weather statement, May 26, 3:47 PM MDT, 19 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 347 PM MDT MON MAY 26 2014 WYZ119-262245- EAST LARAMIE COUNTY WY- 347 PM MDT MON MAY 26 2014 ...SIGNIFICANT WEATHER ADVISORY FOR EASTERN LARAMIE COUNTY UNTIL 445 PM MDT... AT 343 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR ALBIN...OR 25 MILES WEST OF KIMBALL. THIS STORM WAS NEARLY STATIONARY...AND HAS PRODUCED RAINFALL AMOUNTS OVER A HALF INCH WITHIN THE LAST 30 MINUTES. HAIL UP TO ONE-HALF INCH IN DIAMETER IS EXPECTED WITH THIS STORM...ALONG WITH TORRENTIAL RAINFALL. LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE... MAINLY RURAL AREAS OF EXTREME EASTERN LARAMIE COUNTY. TORRENTIAL RAIN...WHICH MAY FLOOD LOW LYING AREAS SUCH AS DITCHES AND UNDERPASSES...IS ALSO LIKELY. DO NOT DRIVE YOUR VEHICLE ON A FLOODED ROADWAY. && LAT...LON 4128 10405 4125 10418 4137 10419 4140 10408 TIME...MOT...LOC 2144Z 331DEG 1KT 4135 10412 COX
The office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 25, 6:14 PM MDT | Special Weather Statement | CYS | Laramie | 31 min |
| May 25, 6:20 PM MDT | Special Weather Statement | CYS | Platte | 25 min |
| May 25, 6:22 PM MDT | Special Weather Statement | CYS | Laramie | 23 min |
| May 25, 6:48 PM MDT | Special Weather Statement | CYS | Laramie | 27 min |
| May 25, 6:58 PM MDT | Special Weather Statement | CYS | Platte | 32 min |
| May 25, 8:26 PM MDT | Areal Flood Warning | CYS | Albany | 12 hr |
Nearby
Flash Flood Warnings in Wyoming, 2014Every flash flood warning in 2014
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.