Alert archive / Wyoming / Flash Flood Warnings in 2008
Flash Flood Warning 2, NWS Cheyenne, WY
NWS Cheyenne, WY issued this flash flood warning at May 22, 2008, 5:15 PM MDT for Platte 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 22, 2008, 5:15 PM MDT (23:15 UTC)
- Expired
- May 22, 2008, 10:53 PM MDT
- In force
- 6 hr
- Issued by
- NWS Cheyenne, WY
- Area
- Storm-based polygon
- Flood severity
- None
County Platte County, WY
The radar
The Cheyenne radar (KCYS), 111 km from the middle of the area, began a volume at 23:16 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.
The nearest sounding before it
Rapid City, SD (KUNR), launched 12:00Z, 11.3 hours before the alert went out and 278 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
- 614 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 69 m²/s²
- 0-3 km storm-relative helicity
- 190 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WGUS55 KCYS 222322 FFWCYS WYC031-230315- /O.NEW.KCYS.FF.W.0002.080522T2315Z-080523T0315Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE CHEYENNE WY 515 PM MDT THU MAY 22 2008 THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A * FLASH FLOOD WARNING FOR... CENTRAL PLATTE COUNTY IN SOUTHEAST WYOMING... * UNTIL 915 PM MDT * AT 511 PM MDT...THE PLATTE COUNTY SHERIFFS OFFICE REPORTED THAT RECENT HEAVY RAINFALL HAS WASHED OUT A PORTION OF FISH CREEK ROAD TO THE NORTHWEST OF WHEATLAND. * LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO I-25 MM 87 AND MUCH OF FISH CREEK NORTHWEST OF WHEATLAND. ADDITIONAL RAINFALL AMOUNTS OF ONE HALF INCH ARE LIKELY EARLY THIS EVENING OVER CENTRAL PLATTE COUNTY FROM STRONG THUNDERSTORMS. THE ADDITIONAL RAINFALL WILL KEEP WATER LEVELS HIGH WITH FLASH FLOODING LIKELY CONTINUING ALONG FISH CREEK. A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING. IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY. RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY AUTOMOBILE. REPORT FLOODING TO THE NATIONAL WEATHER SERVICE OFFICE IN CHEYENNE AT 1-800-269-6220. LAT...LON 4218 10517 4223 10488 4208 10488 4201 10513 TIME...MOT...LOC 2315Z 180DEG 0KT 4204 10494 $$ WEILAND
3 follow-up statements
000 WGUS75 KCYS 230053 FFSCYS FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 653 PM MDT THU MAY 22 2008 WYC031-230315- /O.CON.KCYS.FF.W.0002.000000T0000Z-080523T0315Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ PLATTE WY- 653 PM MDT THU MAY 22 2008 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 915 PM MDT FOR WESTERN AND NORTHERN PLATTE COUNTY... AT 640 PM MDT...THE PLATTE COUNTY SHERIFFS OFFICE REPORTED THAT THE RECENT HEAVY RAINFALL HAS PRODUCED 4 TO 6 INCHES OF WATER FLOWING OVER MANY ROADS WEST OF WHEATLAND...AROUND WHEATLAND AS WELL AS THE NORTH PART OF PLATTE COUNTY. SOME ROADS HAVE BEEN CLOSED DUE TO THE WATER FLOWING OVER THE ROADS AND A PORTION OF FISH CREEK ROAD WAS WASHED OUT LATE THIS AFTERNOON. TWO TO THREE FEET OF WATER WAS ALSO FLOWING OVER PLEASANT VALLEY ROAD IN GUERNSEY. IN ADDITION...THE LARAMIE RIVER AND NORTH LARAMIE RIVER HAVE JUST WENT OUT OF THEIR BANKS WITH LOCAL LOW LAND FLOODING TAKING PLACE. RAINFALL RATES AND COVERAGE OF THUNDERSTORMS WILL GRADUALLY DIMINISH THROUGH EARLY TONIGHT IN PLATTE COUNTY. HOWEVER...THE WATER LEVELS WILL REMAIN HIGH FOR MOST OF THE REST OF TONIGHT. A SEVERE THUNDERSTORM WATCH ALSO REMAINS IN EFFECT UNTIL 900 PM MDT THURSDAY EVENING FOR CENTRAL NEBRASKA AND SOUTHEAST WYOMING. LAT...LON 4218 10517 4223 10488 4208 10488 4201 10513 TIME...MOT...LOC 0041Z 180DEG 0KT 4201 10491 $$ WEILAND
000 WGUS55 KCYS 230258 FFWCYS WYC031-230715- /O.EXT.KCYS.FF.W.0002.000000T0000Z-080523T0715Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE CHEYENNE WY 844 PM MDT THU MAY 22 2008 THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS EXTENDED THE * FLASH FLOOD WARNING FOR... WESTERN AND NORTHERN PLATTE COUNTY IN SOUTHEAST WYOMING... * UNTIL 115 AM MDT * AT 842 PM MDT...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED FLOODING FROM EARLIER HEAVY RAINFALL OVER THE AREA. IN ADDITION...STRONG THUNDERSTORMS WILL CONTINUE OVER MUCH OF PLATTE COUNTY THROUGH EARLY FRIDAY MORNING AND WILL AGGRAVATE THE EXISTING FLOODING. * LOCATIONS IN THE WARNING INCLUDE ALL OF WESTERN AND NORTHERN PLATTE COUNTY...INCLUDING THE CITIES OF WHEATLAND...GLENDO AND GUERNSEY. ADDITIONAL RAINFALL AMOUNTS OF UP TO AN INCH OF RAIN IN A SHORT TIME ARE POSSIBLE IN PLATTE COUNTY THROUGH EARLY FRIDAY MORNING. AS OF 840 PM... FISH CREEK NORTHWEST OF WHEATLAND WAS NEAR BANKFULL AND THE LARAMIE AND NORTH LARAMIE RIVERS ARE OUT OF THEIR BANKS AND CAUSING FLOODING OF LOW LYING AGRICULTURAL AREAS. WATER WAS STILL FLOWING OVER MANY ROADS WEST OF WHEATLAND AND IN THE GUERNSEY AREA. EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF STREAMS...COUNTRY ROADS...NORMALLY DRY WASHES...AS WELL AS LOW LYING AREAS ALONG THE BANKS OF STREAMS. DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS SAFELY. MOVE TO HIGHER GROUND. REPORT FLOODING TO THE NATIONAL WEATHER SERVICE OFFICE IN CHEYENNE AT 1-800-269-6220. LAT...LON 4218 10517 4223 10488 4208 10488 4201 10513 TIME...MOT...LOC 0244Z 180DEG 0KT 4201 10491 $$ WEILAND
000 WGUS75 KCYS 230453 FFSCYS FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 1049 PM MDT THU MAY 22 2008 WYC031-230459- /O.CAN.KCYS.FF.W.0002.000000T0000Z-080523T0715Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ PLATTE WY- 1049 PM MDT THU MAY 22 2008 ...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR WESTERN AND NORTHERN PLATTE COUNTY... THE RAINFALL RATES HAVE TAPERED OFF SOME LATE THIS EVENING OVER PLATTE COUNTY AS THE SHOWERS AND THUNDERSTORMS GRADUALLY WEAKEN. THE THREAT FOR FLASH FLOODING HAS ENDED OVER THE COUNTY. HOWEVER...FLOODING WILL CONTINUE OVER THE WEST AND NORTH PARTS OF THE COUNTY THE REST OF TONIGHT AND FRIDAY. THE FLASH FLOOD WARNING WILL BE REPLACED BY A FLOOD WARNING WHICH WILL BE IN EFFECT THROUGH FRIDAY. LAT...LON 4218 10517 4223 10488 4208 10488 4201 10513 TIME...MOT...LOC 0449Z 180DEG 0KT 4201 10491 $$ WEILAND
The office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 21, 6:10 PM MDT | Severe Thunderstorm Warning | CYS | Albany, Converse, Platte | 50 min |
| May 21, 6:20 PM MDT | Areal Flood Advisory | CYS | Albany, Converse | 96 min |
| May 21, 7:02 PM MDT | Severe Thunderstorm Warning | CYS | Platte | 43 min |
| May 21, 8:28 PM MDT | Areal Flood Advisory | CYS | Platte | 90 min |
| May 22, 7:58 AM MDT | Dense Fog Advisory | CYS | 2 hr | |
| May 22, 9:15 AM MDT | Areal Flood Advisory | CYS | Platte | 4 hr |
| May 22, 10:18 AM MDT | Dense Fog Advisory | CYS | 102 min | |
| May 22, 12:31 PM MDT | Flash Flood Watch | CYS | Weston | 11 hr |
| May 22, 12:58 PM MDT | Severe Thunderstorm Warning | CYS | Albany, Laramie | 47 min |
| May 22, 1:14 PM MDT | Tornado Warning | CYS | Albany | 31 min |
| May 22, 1:44 PM MDT | Tornado Warning | CYS | Albany | 31 min |
| May 22, 2:07 PM MDT | Tornado Warning | CYS | Albany | 23 min |
| May 22, 2:14 PM MDT | Severe Thunderstorm Warning | CYS | Goshen, Laramie | 31 min |
| May 22, 2:15 PM MDT | Tornado Warning | CYS | Albany, Carbon | 30 min |
| May 22, 2:26 PM MDT | Flash Flood Warning | CYS | Albany | 4 hr |
| May 22, 2:29 PM MDT | Tornado Warning | CYS | Albany | 31 min |
| May 22, 3:11 PM MDT | Tornado Warning | CYS | Albany, Laramie | 34 min |
| May 22, 3:27 PM MDT | Tornado Warning | CYS | Laramie | 33 min |
| May 22, 4:00 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 45 min |
| May 22, 5:00 PM MDT | Areal Flood Advisory | CYS | Laramie | 2 hr |
| May 22, 5:16 PM MDT | Severe Thunderstorm Warning | CYS | Albany, Converse, Platte | 44 min |
| May 22, 5:32 PM MDT | Flash Flood Warning | CYS | Platte | 66 min |
Nearby
Flash Flood Warnings in Wyoming, 2008Every flash flood warning in 2008
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.