Alert archive / Wyoming / Flash Flood Warnings in 1986
Flash Flood Warning 3, NWS Cheyenne, WY
NWS Cheyenne, WY issued this flash flood warning at Jun 10, 1986, 11:30 AM MDT for Albany County, Carbon County, Wyoming. It was in force for 19 hr.
The area
The counties it named.
The facts
- Issued
- Jun 10, 1986, 11:30 AM MDT (17:30 UTC)
- Expired
- Jun 11, 1986, 6:00 AM MDT
- In force
- 19 hr
- Issued by
- NWS Cheyenne, WY
- Area
- Whole counties
Counties Albany County, WY, Carbon County, WY
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
The nearest sounding before it
Lander/Hunt Fiel, WY (KLND), launched 12:00Z, 5.5 hours before the alert went out and 233 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1343 m above ground
- 0-6 km bulk shear
- 12 kt
- 0-1 km storm-relative helicity
- 30 m²/s²
- 0-3 km storm-relative helicity
- 28 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KCYS 110552 COR FFWCYS WYC001-007-111200- BULLETIN - EBS ACTIVATION REQUESTED...CORRECTED FOR EXPIRATION TIME... FLASH FLOOD WARNING NATIONAL WEATHER SERVICE CHEYENNE WYOMING 1130 PM MDT TUE JUN 10 1986 THE NATIONAL WEATHER SERVICE HAS ISSUED A FLASH FLOOD WARNING EFFECTIVE UNTIL 6 AM MDT FOR PEOPLE IN THE FOLLOWING COUNTIES OF SOUTHEAST WYOMING..NORTHWEST ALBANY AND NORTHEAST CARBON AT 841 PM MDT THIS EVENING THE PIERCE RESERVOIR DAM FAILED. THIS DAM IS ON THE ROCK CREEK ABOUT 10 MILES WEST OF THE TOWN OF ROCK RIVER... AND ABOUT 35 MILES NORTHWEST OF LARAMIE. AT 1050 PM...THE CREST OF THE FLOOD WAS MEASURED AT 16 FEET AS IT CROSSED HIGHWAY 13 JUST WEST OF THE TOWN OF ROCK RIVER. THE FLOOD CREST HAS BEEN MOVING DOWNSTREAM AT ABOUT 3 MILES AN HOUR. AT THIS RATE IT WILL TAKE ABOUT 10 HOURS TO REACH THE TOWN OF MEDICINE BOW. THE CREST WILL CROSS THE RAILROAD LINE NEAR ROCK RIVER IN THE NEXT HOUR WITH A CREST NEAR 15 FEET. THIS CREST WILL ONLY BE ABOUT 1 FOOT HIGH BY THE TIME IT REACHES MEDICINE BOW AFTER 8AM WEDNESDAY MORNING. PEOPLE ALONG ROCK CREEK SHOULD BE PREPARED FOR RISING WATER. THIS IS A DANGEROUS SITUATION FOR LOW LYING SPOTS ALONG THE CREEK. ROADS AND BRIDGES MAY BE WASHED OUT. DO NOT ATTEMPT TO DRIVE ACROSS ANY FLOODED ROADWAYS...YOUR CAR WOULD BE QUICKLY SWEPT DOWNSTREAM. EVACUATE TO HIGHER GROUND IF THREATENED. PASS ANY INFORMATION ON FLOODING TO YOUR COUNTY SHERRIF OR THE NATIONAL WEATHER SERVICE. GLANCY
What 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.
In the hours before
Special weather statement, Jun 10, 6:20 AM MDT, 5 hours 10 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SCOTTSBLUFF NE 620 AM MDT TUE JUN 10 1986 THE NORMALLY SEMIARID NEBRASKA PANHANDLE HAS BECOME A SEA OF WATER IN MINATURE. HEAVY RAINFALLS HAVE BEEN COMMON FOR MANY PARTS OF THE NEBRASKA PANHANDLE. THE TWO DAY RAINFALLS THROUGH 5 AM MDT THIS MORNING RANGED FROM AROUND TWO AND A HALF INCHES IN KIMBALL TO OVER FOUR INCHES AT CRAWFORD OR 25 MILES WEST OF CHADRON. IN ADDITION...RAIN CONTINUED OVER MOST OF THE NEBRASKA PANHANDLE WITH LARGE PATCHES OF MODERATE RAINS AND ISOLATED HEAVY RAINS THIS MORNING. TO MAKE MATTERS WORSE...MANY PARTS OF EASTERN WYOMING HAVE ALSO RECEIVED HEAVY RAINS THAT CONTINUED THIS MORNING. THIS RAIN WILL MOVE DOWN NORMALLY DRY WASHES CREEKBEDS INTO THE NEBRASKA PANHANDLE TO ADD TO THE PROBLEMS. < WHILE NO SERIOUS FLASH FLOOD PROBLEMS HAVE BEEN REPORTED...MANY FIELDS ARE FLOODED, NORMALLY DRY WASHES HAVE RUNNING WATER, THE SMALL CREEKS AND RIVERS CONTINUE TO RISE AND THE NORTH PLATTE RIVER HAS RISEN SHARPLY THROUGH THIS MORNING. ALSO...MANY ROADS HAVE STANDING WATER AND SOME HAVE SOME RUNNING WATER. MANY COUNTY ROADS ARE A MESS WITH THE WATER AND MUD COMBINED. THE HARDIEST HIT COUNTIES HAVE BEEN CHEYENNE, KIMBALL, BANNER, SCOTTS BLUFF, MORRILL, GARDEN, SIOUX AND WEST DAWES. PEOPLE ARE URGED TO AVOID LOW AREAS, NORMALLY DRY WASHES AND CREEKS, AND THE LOWLAND AREAS NEAR THE NORTH PLATTE RIVER TODAY. ALSO...MOTORIST ARE URGED TO USE CAUTION AND STAY ON PAVED HIGHWAYS. IF YOU ARE NOT FAMILIAR OR USED TO DRIVING ON THE DIRT ROADS, PLEASE STAY OFF THEM. WITH THE MUD AND WATER ON THESE DIRT ROADS, YOU COULD BECOME STUCK OR EVEN WORSE, LOSE CONTROL OF YOUR VEHICLE AND HAVE A SERIOUS ACCIDENT. IT IS NOT A GOOD DAY TO GO SIGHTSEEING ON THE BACK ROADS OF THE NEBRASKA PANHANDLE. MOTORISTS SHOULD ALSO BE ON THE LOOKOUT FOR STANDING OR RUNNING WATER ESPECIALLY IN LOW AREAS AND UNDERPASSES. THE CAUSE FOR ALL THE RAIN WAS LOW PRESSURE SYSTEM CENTERED IN SOUTHWEST NEBRASKA. THIS SYSTEM WILL FINALLY BE MOVING OFF TO THE EAST TODAY AND THE HEAVIER RAINFALLS SHOULD TAPER AROUND NOON TODAY. AGAIN...PLEASE USE CAUTION NEAR WASHES, CREEKS, RIVERS, LOW AREAS AND AVOID THE DIRT ROADS IN THE NEBRASKA PANHANDLE IF AT ALL POSSIBLE. KARR
The office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 10, 3:00 AM MDT | Flash Flood Warning | CYS | Laramie | 4 hr |
| Jun 10, 11:00 AM MDT | Flash Flood Warning | CYS | Platte | 20 hr |
Nearby
Flash Flood Warnings in Wyoming, 1986Every flash flood warning in 1986
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.