Alert archive / Colorado / Flash Flood Warnings in 2022
Flash Flood Warning 49, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this flash flood warning at Aug 14, 2022, 12:02 PM MDT for Larimer County, Colorado. It was in force for 3 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
- Aug 14, 2022, 12:02 PM MDT (18:02 UTC)
- Expired
- Aug 14, 2022, 2:45 PM MDT
- In force
- 3 hr
- Issued by
- NWS Denver/Boulder, CO
- Area
- Storm-based polygon
- Flood severity
- None
County Larimer County, CO
The radar
The Cheyenne radar (KCYS), 90 km from the middle of the area, began a volume at 18:05 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, 6.0 hours before the alert went out and 301 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
- 1 J/kg
- Mixed-layer CIN
- -240 J/kg
- Mixed-layer LCL
- 2206 m above ground
- 0-6 km bulk shear
- 6 kt
- 0-1 km storm-relative helicity
- 34 m²/s²
- 0-3 km storm-relative helicity
- 60 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
303
WGUS55 KBOU 141802
FFWBOU
COC069-142045-
/O.NEW.KBOU.FF.W.0049.220814T1802Z-220814T2045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Denver CO
1202 PM MDT Sun Aug 14 2022
The National Weather Service in Denver has issued a
* Flash Flood Warning for...
Central Larimer County in north central Colorado...
* Until 245 PM MDT.
* At 1202 PM MDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 0.4 and 0.5 inches of
rain have fallen. Flash flooding is ongoing or expected to begin
shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar.
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...
The Retreat.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Move to higher ground now. Act quickly to protect your life.
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 4056 10549 4056 10546 4055 10542 4052 10540
4048 10540 4046 10541 4046 10543 4047 10550
4049 10553 4051 10552 4055 10552
FLASH FLOOD...RADAR INDICATED
$$
Bowen2 follow-up statements
191
WGUS75 KBOU 141823
FFSBOU
Flash Flood Statement
National Weather Service Denver CO
1223 PM MDT Sun Aug 14 2022
COC069-142045-
/O.CON.KBOU.FF.W.0049.000000T0000Z-220814T2045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Larimer CO-
1223 PM MDT Sun Aug 14 2022
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 245 PM MDT THIS
AFTERNOON FOR CENTRAL LARIMER COUNTY...
At 1223 PM MDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 0.8 and 1 inch of rain
has fallen. Flash flooding is ongoing or expected to begin shortly.
HAZARD...Life threatening flash flooding. Thunderstorms producing
flash flooding.
SOURCE...Radar.
IMPACT...Life threatening flash flooding of creeks and streams,
roads, and low lying areas.
Some locations that will experience flash flooding include...
mainly rural areas of Central Larimer County to include Miller
Fork and Black Creek.
This includes the following additional locations...
The Retreat.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Move to higher ground now. Act quickly to protect your life.
THIS IS A LIFE THREATENING SITUATION! Heavy Rainfall will cause
extensive and severe flooding of creeks, streams, roads and culverts
in the affected part of the Cameron Peak burn area. Rock slides or
debris flows can also be expected across roads in the warning area.
&&
LAT...LON 4056 10549 4056 10546 4055 10542 4052 10540
4048 10540 4046 10541 4046 10543 4047 10550
4049 10553 4051 10552 4055 10552
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
Bowen121
WGUS75 KBOU 142054
FFSBOU
Flash Flood Statement
National Weather Service Denver CO
254 PM MDT Sun Aug 14 2022
COC069-142104-
/O.EXP.KBOU.FF.W.0049.000000T0000Z-220814T2045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Larimer CO-
254 PM MDT Sun Aug 14 2022
...FLASH FLOOD WARNING HAS EXPIRED FOR CENTRAL LARIMER COUNTY...
Flooding is no longer expected to pose a threat at this time.
Thunderstorms producing heavy rain are still in the area. Please
continue to heed remaining road closures.
LAT...LON 4056 10549 4056 10546 4055 10542 4052 10540
4048 10540 4046 10541 4046 10543 4047 10550
4049 10553 4051 10552 4055 10552
$$
BowenThe office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 13, 6:23 PM MDT | Flash Flood Warning | BOU | Larimer | 3 hr |
| Aug 13, 6:59 PM MDT | Special Weather Statement | BOU | Denver | 31 min |
| Aug 14, 11:45 AM MDT | Areal Flood Advisory | BOU | Larimer | 17 min |
| Aug 14, 1:25 PM MDT | Special Weather Statement | BOU | Larimer | 50 min |
| Aug 14, 1:37 PM MDT | Flood Watch | BOU | Arapahoe, Boulder, Clear Creek, Douglas, Elbert, Gilpin and 6 more | 30 hr |
| Aug 14, 2:01 PM MDT | Areal Flood Advisory | BOU | Larimer | 3 hr |
| Aug 14, 2:13 PM MDT | Special Weather Statement | BOU | Boulder | 47 min |
| Aug 14, 2:29 PM MDT | Flash Flood Warning | BOU | Larimer | 3 hr |
| Aug 14, 3:10 PM MDT | Special Weather Statement | BOU | Douglas | 50 min |
| Aug 14, 3:17 PM MDT | Special Weather Statement | BOU | Weld | 58 min |
| Aug 14, 3:22 PM MDT | Severe Thunderstorm Warning | BOU | Weld | 23 min |
| Aug 14, 3:40 PM MDT | Special Weather Statement | BOU | Broomfield | 35 min |
| Aug 14, 4:00 PM MDT | Severe Thunderstorm Warning | BOU | Weld | 30 min |
| Aug 14, 4:57 PM MDT | Areal Flood Advisory | BOU | Weld | 93 min |
| Aug 14, 5:03 PM MDT | Special Weather Statement | BOU | Weld | 42 min |
| Aug 14, 5:54 PM MDT | Special Weather Statement | BOU | Adams | 36 min |
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.