Alert archive / Colorado / Flash Flood Warnings in 2022
Flash Flood Warning 21, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this flash flood warning at Jul 15, 2022, 5:37 PM MDT for Larimer County, Colorado. It was in force for 2 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
- Jul 15, 2022, 5:37 PM MDT (23:37 UTC)
- Expired
- Jul 15, 2022, 8:00 PM MDT
- In force
- 2 hr
- Issued by
- NWS Denver/Boulder, CO
- Area
- Storm-based polygon
- Flood severity
- None
County Larimer County, CO
The radar
The Cheyenne radar (KCYS), 87 km from the middle of the area, began a volume at 23:40 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
Grand Junction, CO (KGJT), launched 12:00Z, 11.6 hours before the alert went out and 306 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
- 54 J/kg
- Mixed-layer CIN
- -124 J/kg
- Mixed-layer LCL
- 1923 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- -3 m²/s²
- 0-3 km storm-relative helicity
- 78 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
028
WGUS55 KBOU 152337
FFWBOU
COC069-160200-
/O.NEW.KBOU.FF.W.0021.220715T2337Z-220716T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Denver CO
537 PM MDT Fri Jul 15 2022
The National Weather Service in Denver has issued a
* Flash Flood Warning for...
Central Larimer County in north central Colorado...
* Until 800 PM MDT.
* At 537 PM MDT, emergency management reported flash flooding
occurring east of Glen Haven, and in the Crystal Mountain and
Buckhorn areas. County Road 43 was impassable east of Glen Haven.
County Road 44H was impassable just west of Stove Prairie Road.
Flooding was mainly occurring on Miller Fork, Sheep Creek in the
Crystal Mountain area, and on Buckhorn Creek below Sheep Creek
near Stove Prairie Road. Significant rises are likely on Buckhorn
Creek as it turns south from that area over the next couple of
hours.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Emergency management reported.
IMPACT...Flash flooding of small creeks and streams, gulches,
roads, and poor drainage and low-lying areas.
* Some locations that will experience flash flooding include...
mainly rural areas of Central Larimer County
This includes the following additional locations...
Lower Buckhorn on County Road 27 above Masonville, Crystal Mountain,
The Retreat and Storm Mountain.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Be aware of your surroundings and do not drive on flooded roads.
Heavy Rainfall will cause flash flooding of small creeks, streams,
and ditches in the affected part of the Cameron Peak burn area. Rock
slides or debris flows can also be expected across rural roads.
&&
LAT...LON 4047 10553 4054 10551 4057 10545 4057 10529
4053 10526 4055 10530 4052 10532 4043 10539
4046 10543
FLASH FLOOD...OBSERVED
$$
GimmestadThe office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 15, 3:52 PM MDT | Flash Flood Warning | BOU | Larimer | 3 hr |
| Jul 15, 4:56 PM MDT | Areal Flood Advisory | BOU | Larimer | 3 hr |
Nearby
Flash Flood Warnings in Colorado, 2022Every flash flood warning in 2022
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.