Alert archive / Wyoming / Flash Flood Warnings in 2018
Flash Flood Warning 9, NWS Cheyenne, WY
NWS Cheyenne, WY issued this flash flood warning at Jul 12, 2018, 12:42 PM MDT for Albany County, Wyoming. It was in force for 3 hr. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Jul 12, 2018, 12:42 PM MDT (18:42 UTC)
- Expired
- Jul 12, 2018, 3:30 PM MDT
- In force
- 3 hr
- Issued by
- NWS Cheyenne, WY
- Area
- Storm-based polygon
- Flood severity
- None
County Albany County, WY
The radar
The Cheyenne radar (KCYS), 108 km from the middle of the area, began a volume at 18:44 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 12, 1:45 PM MDT | FLASH FLOOD | 1 Sse Woods Landing, WY | REPORT OF MUD AND DEBRIS ACROSS HIGHWAY 230 NEAR WOODS LANDING. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Denver, CO (KDEN), launched 12:00Z, 6.7 hours before the alert went out and 276 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
- 6 J/kg
- Mixed-layer CIN
- -334 J/kg
- Mixed-layer LCL
- 1617 m above ground
- 0-6 km bulk shear
- 10 kt
- 0-1 km storm-relative helicity
- 1 m²/s²
- 0-3 km storm-relative helicity
- 30 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
816
WGUS55 KCYS 121842
FFWCYS
WYC001-122130-
/O.NEW.KCYS.FF.W.0009.180712T1842Z-180712T2130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Cheyenne WY
1242 PM MDT THU JUL 12 2018
The National Weather Service in Cheyenne has issued a
* Flash Flood Warning for...
Southern Albany County in southeastern Wyoming...
* Until 330 PM MDT.
* At 1236 PM MDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. This includes the Badger Creek
Fire Burn Scar. Up to one inch of rain has already fallen. Flash
flooding is expected to begin shortly.
* Some locations that will experience flooding include...
The Badger Creek Fire Burn Scar, Boswell Creek Campground, Woods
Landing, Miller Lake Campground, Evans Creek Campground and Woods
Landing-Jelm.
Excessive rainfall over the Badger Creek burn scar will result in
the possibility of debris flows moving through the Bear Creek Basin.
This includes the following drainages; Bear, Eagle, Shellrock, and
Jelm Creeks. The debris flow can consist of rock, mud, vegetation
and other loose materials.
Additional rainfall amounts of one half inch are possible in the
warned area.
LAT...LON 4114 10598 4100 10591 4100 10626 4103 10628
4112 10613
$$
LyonsThe office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 11, 7:34 PM MDT | Special Weather Statement | CYS | Albany | 41 min |
| Jul 11, 10:23 PM MDT | Areal Flood Advisory | CYS | Carbon | 3 hr |
| Jul 12, 1:32 PM MDT | Special Weather Statement | CYS | Platte | 43 min |
| Jul 12, 1:59 PM MDT | Special Weather Statement | CYS | Albany | 46 min |
| Jul 12, 5:34 PM MDT | Special Weather Statement | CYS | Converse | 26 min |
Nearby
Flash Flood Warnings in Wyoming, 2018Every flash flood warning 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.