Alert archive / Wyoming / Flash Flood Watches in 2015
Flash Flood Watch 4, NWS Cheyenne, WY
NWS Cheyenne, WY issued this flash flood watch at Jun 10, 2015, 3:39 AM MDT for 6 counties in Wyoming; 6 counties in Nebraska. It took effect at Jun 10, 2015, 12:00 PM MDT. It was in force for 30 hr.
The area
The counties it named.
The facts
- Issued
- Jun 10, 2015, 3:39 AM MDT (09:39 UTC)
- In effect from
- Jun 10, 2015, 12:00 PM MDT
- Expired
- Jun 11, 2015, 6:03 PM MDT
- In force
- 30 hr
- Issued by
- NWS Cheyenne, WY
- Flood severity
- None
Counties Banner County, NE, Box Butte County, NE, Dawes County, NE, Kimball County, NE, Scotts Bluff County, NE, Sioux County, NE, Albany County, WY, Converse County, WY, Goshen County, WY, Laramie County, WY, Niobrara County, WY, Platte County, WY
The radar
The Cheyenne radar (KCYS), 116 km from the middle of the area, began a volume at 09:40 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 (KRAP), launched 00:00Z, 9.7 hours before the alert went out and 245 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
- 2145 J/kg
- Mixed-layer CIN
- -62 J/kg
- Mixed-layer LCL
- 1943 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- -6 m²/s²
- 0-3 km storm-relative helicity
- -48 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this flash flood watch 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 watch went out at Jun 9, 9:20 PM MDT, 6 hours 19 minutes earlier.
Area forecast discussion, Jun 9, 9:20 PM MDT, 6 hours 19 minutes before
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</html>Hazardous weather outlook, Jun 9, 5:34 AM MDT, 22 hours 5 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE CHEYENNE WY 534 AM MDT TUE JUN 9 2015 WYZ101>119-101145- CONVERSE COUNTY LOWER ELEVATIONS-NIOBRARA COUNTY- NORTH LARAMIE RANGE-FERRIS/SEMINOE/SHIRLEY MOUNTAINS- SHIRLEY BASIN-CENTRAL LARAMIE RANGE AND SOUTHWEST PLATTE COUNTY- EAST PLATTE COUNTY-GOSHEN 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- CENTRAL LARAMIE COUNTY-EAST LARAMIE COUNTY- 534 AM MDT TUE JUN 9 2015 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHEAST WYOMING. .DAY ONE...TODAY AND TONIGHT A FEW AFTERNOON THUNDERSTORMS ARE POSSIBLE OVER THE MOUNTAINS. ANY STORMS THAT FORM WILL MOVE TO THE SOUTHEAST. SEVERE WEATHER IS NOT EXPECTED. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY TROPICAL MOISTURE FROM THE REMNANTS OF TROPICAL STORM BLANCA IN THE EASTERN PACIFIC WILL MOVE NORTHEAST INTO SOUTHERN WYOMING WEDNESDAY THROUGH THURSDAY. SHOWERS AND THUNDERSTORMS WILL BECOME MORE NUMEROUS AT THAT TIME. SEVERE WEATHER IS NOT EXPECTED. GIVEN THE ALREADY SATURATED SOILS...THERE IS THE POTENTIAL FOR ADDITIONAL FLASH FLOODING IN SOME AREAS. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY AND TONIGHT. NEZ002-003-019>021-054-055-095-096-101145- DAWES-BOX BUTTE-SCOTTS BLUFF-BANNER-MORRILL-KIMBALL-CHEYENNE- NORTH SIOUX-SOUTH SIOUX- 534 AM MDT TUE JUN 9 2015 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF WESTERN NEBRASKA. .DAY ONE...TODAY AND TONIGHT NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY TROPICAL MOISTURE FROM THE REMNANTS OF TROPICAL STORM BLANCA IN THE EASTERN PACIFIC WILL MOVE NORTHEAST INTO SOUTHEAST WYOMING AND WESTERN NEBRASKA WEDNESDAY THROUGH THURSDAY. SHOWERS AND THUNDERSTORMS WILL BECOME MORE NUMEROUS AT THAT TIME. A FEW STRONG STORMS WITH SMALL HAIL AND GUSTY WINDS WILL BE POSSIBLE ON WEDNESDAY. GIVEN THE ALREADY SATURATED SOILS...THERE IS THE POTENTIAL FOR ADDITIONAL FLASH FLOODING IN SOME AREAS. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY AND TONIGHT.
The office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 9, 7:13 PM MDT | Special Weather Statement | CYS | Converse | 62 min |
| Jun 10, 4:11 PM MDT | Special Weather Statement | CYS | Converse | 49 min |
| Jun 10, 5:04 PM MDT | Special Weather Statement | CYS | Converse | 41 min |
| Jun 10, 1:16 PM MDT | Special Weather Statement | CYS | Sioux | 44 min |
| Jun 10, 1:48 PM MDT | Flash Flood Warning | CYS | Sioux | 4 hr |
| Jun 10, 2:15 PM MDT | Severe Thunderstorm Warning | CYS | Sioux | 30 min |
| Jun 10, 2:47 PM MDT | Severe Thunderstorm Warning | CYS | Sioux | 22 min |
Nearby
Flash Flood Watches in Wyoming, 2015Flash Flood Watches in Nebraska, 2015Every flash flood watch in 2015
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.