Alert archive / Wyoming / Flash Flood Watches in 2018
Flash Flood Watch 8, NWS Cheyenne, WY
NWS Cheyenne, WY issued this flash flood watch at Jul 25, 2018, 10:11 AM MDT for Albany County, Carbon County, Laramie County, Wyoming; Kimball County, Nebraska. It took effect at Jul 25, 2018, 4:00 PM MDT. It was in force for 5 hr.
The area
The counties it named.
The facts
- Issued
- Jul 25, 2018, 10:11 AM MDT (16:11 UTC)
- In effect from
- Jul 25, 2018, 4:00 PM MDT
- Expired
- Jul 25, 2018, 9:29 PM MDT
- In force
- 5 hr
- Issued by
- NWS Cheyenne, WY
- Flood severity
- None
Counties Kimball County, NE, Albany County, WY, Carbon County, WY, Laramie County, WY
The radar
The Cheyenne radar (KCYS), 52 km from the middle of the area, began a volume at 16:10 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
Denver, CO (KDEN), launched 12:00Z, 4.2 hours before the alert went out and 247 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
- 20 J/kg
- Mixed-layer CIN
- -431 J/kg
- Mixed-layer LCL
- 2245 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 87 m²/s²
- 0-3 km storm-relative helicity
- 74 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 Jul 25, 9:15 AM MDT, 56 minutes earlier.
Area forecast discussion, Jul 25, 9:15 AM MDT, 56 minutes before
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</html>Hazardous weather outlook, Jul 25, 4:01 AM MDT, 6 hours 10 minutes before
Hazardous Weather Outlook National Weather Service Cheyenne WY 401 AM MDT Wed Jul 25 2018 NEZ002-003-019>021-054-055-095-096-WYZ101>103-106>108-116>119- 261030- Dawes-Box Butte-Scotts Bluff-Banner-Morrill-Kimball-Cheyenne- North Sioux-South Sioux-Converse County Lower Elevations- Niobrara County-North Laramie Range- Central Laramie Range and Southwest Platte County- East Platte County-Goshen County-South Laramie Range- South Laramie Range Foothills-Central Laramie County- East Laramie County- 401 AM MDT Wed Jul 25 2018 This hazardous weather outlook is for portions of western Nebraska...east central Wyoming and southeast Wyoming. .DAY ONE...TODAY AND TONIGHT Scattered thunderstorms will develop over the area this afternoon and continue through this evening. A few strong storms are possible with gusty winds and hail the main threats. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY Scattered to numerous showers and thunderstorms are expected Thursday through Sunday. Heavy rain is possible along with some potential for strong storms Thursday and Friday. .Spotter information statement... Spotter activation is not expected at this time. WYZ104-105-109>115-261030- Ferris/Seminoe/Shirley Mountains-Shirley Basin- Central Carbon County-North Snowy Range Foothills- Southwest Carbon County-Sierra Madre Range- Upper North Platte River Basin-Snowy Range-Laramie Valley- 401 AM MDT Wed Jul 25 2018 This hazardous weather outlook is for portions of south central Wyoming and southeast Wyoming. .DAY ONE...TODAY AND TONIGHT Scattered thunderstorms will develop over the area this afternoon and continue through early this evening. Severe storms are not anticipated. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY Scattered showers and thunderstorms are expected Thursday through Sunday. Heavy rain is possible with stronger storms. .Spotter information statement... Spotter activation will not be needed.
In the hours before
Special weather statement, Jul 25, 4:52 AM MDT, 5 hours 19 minutes before
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</html>The office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 24, 10:08 PM MDT | Special Weather Statement | CYS | Niobrara | 37 min |
| Jul 25, 1:07 PM MDT | Special Weather Statement | CYS | Albany | 38 min |
| Jul 25, 2:01 PM MDT | Special Weather Statement | CYS | Albany | 44 min |
| Jul 25, 2:46 PM MDT | Special Weather Statement | CYS | Albany | 44 min |
| Jul 25, 3:10 PM MDT | Severe Thunderstorm Warning | CYS | Albany, Laramie | 50 min |
| Jul 25, 3:17 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 43 min |
| Jul 25, 3:44 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 46 min |
| Jul 25, 4:12 PM MDT | Flash Flood Warning | CYS | Laramie | 117 min |
| Jul 25, 4:24 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 38 min |
| Jul 24, 6:08 PM MDT | Special Weather Statement | CYS | Scotts Bluff | 52 min |
| Jul 24, 6:17 PM MDT | Severe Thunderstorm Warning | CYS | Morrill, Scotts Bluff | 43 min |
| Jul 24, 6:51 PM MDT | Special Weather Statement | CYS | Dawes | 39 min |
| Jul 24, 7:35 PM MDT | Special Weather Statement | CYS | Box Butte | 40 min |
| Jul 24, 11:34 PM MDT | Special Weather Statement | CYS | Dawes | 41 min |
| Jul 25, 12:12 AM MDT | Special Weather Statement | CYS | Dawes | 48 min |
| Jul 25, 2:53 AM MDT | Special Weather Statement | CYS | Dawes | 52 min |
| Jul 25, 3:44 AM MDT | Special Weather Statement | CYS | Box Butte | 46 min |
| Jul 25, 4:52 AM MDT | Special Weather Statement | CYS | Dawes | 53 min |
Nearby
Flash Flood Watches in Wyoming, 2018Flash Flood Watches in Nebraska, 2018Every flash flood watch in 2018
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.