Alert archive / Colorado / Flash Flood Watches in 2022
Flash Flood Watch 2, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this flash flood watch at Jul 24, 2022, 2:25 AM MDT for 9 counties in Colorado. It took effect at Jul 24, 2022, 11:00 AM MDT. It was in force for 9 hr.
The area
The counties it named.
The facts
- Issued
- Jul 24, 2022, 2:25 AM MDT (08:25 UTC)
- In effect from
- Jul 24, 2022, 11:00 AM MDT
- Expired
- Jul 24, 2022, 7:57 PM MDT
- In force
- 9 hr
- Issued by
- NWS Denver/Boulder, CO
- Flood severity
- None
Counties Boulder County, CO, Clear Creek County, CO, Gilpin County, CO, Grand County, CO, Jackson County, CO, Jefferson County, CO, Larimer County, CO, Park County, CO, Summit County, CO
The radar
The Denver radar (KFTG), 102 km from the middle of the area, began a volume at 08:29 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 00:00Z, 8.4 hours before the alert went out and 254 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 0 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 2 m²/s²
- 0-3 km storm-relative helicity
- 13 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 Denver/Boulder, CO wrote its last area forecast discussion before this flash flood watch went out at Jul 23, 9:38 PM MDT, 4 hours 47 minutes earlier.
Area forecast discussion, Jul 23, 9:38 PM MDT, 4 hours 47 minutes before
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</html>Hazardous weather outlook, Jul 23, 11:16 AM MDT, 15 hours 9 minutes before
Hazardous Weather Outlook National Weather Service Denver/Boulder CO 1116 AM MDT Sat Jul 23 2022 COZ030>051-241730- Jackson County Below 9000 Feet- West Jackson and West Grand Counties Above 9000 Feet- Grand and Summit Counties Below 9000 Feet- South and East Jackson/Larimer/North and Northeast Grand/ Northwest Boulder Counties Above 9000 Feet- South and Southeast Grand/West Central and Southwest Boulder/ Gilpin/Clear Creek/Summit/North and West Park Counties Above 9000 Feet-Larimer and Boulder Counties Between 6000 and 9000 Feet- Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear Creek/Northeast Park Counties Below 9000 Feet- Central and Southeast Park County- Larimer County Below 6000 Feet/Northwest Weld County- Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County- North Douglas County Below 6000 Feet/Denver/West Adams and Arapahoe Counties/East Broomfield County- Elbert/Central and East Douglas Counties Above 6000 Feet- Northeast Weld County-Central and South Weld County-Morgan County- Central and East Adams and Arapahoe Counties- North and Northeast Elbert County Below 6000 Feet/North Lincoln County- Southeast Elbert County Below 6000 Feet/South Lincoln County- Logan County-Washington County-Sedgwick County-Phillips County- 1116 AM MDT Sat Jul 23 2022 This hazardous weather outlook is for northeast and north central Colorado. .DAY ONE...Today and Tonight It is hot again today, however a cold front will move through all the plains by mid afternoon. Scattered showers and thunderstorms are expected for most of the forecast area this afternoon and evening. They will produce a brief period of rain, lightning, and gusty outflow winds to 50 mph. The strongest storms could produce up to a half of an inch of rain in 30 minutes. There is a low threat of alpine burn area flash flooding. .DAYS TWO THROUGH SEVEN...Sunday through Friday On Sunday, cooler temperatures and a higher coverage of showers and storms can be expected. Some of the thunderstorms in the mountains and near the Palmer Divide will produce locally heavy rainfall. The threat of flash flooding in and near recent burn areas will be elevated. Monday and Tuesday will be warmer and drier, but there will still be a chance of afternoon and evening thunderstorms both days. The threat of flash flooding in the burn areas will be limited. By the middle of the week, it will be cooler again with a better chance of showers and thunderstorms. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed today or tonight. RJK/Gimmestad
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 23, 6:37 PM MDT | Areal Flood Advisory | BOU | Larimer | 3 hr |
| Jul 23, 6:47 PM MDT | Areal Flood Advisory | BOU | Grand | 3 hr |
| Jul 23, 7:50 PM MDT | Flash Flood Warning | BOU | Boulder | 2 hr |
| Jul 24, 2:25 AM MDT | Flood Watch | BOU | Arapahoe, Douglas, Elbert, Lincoln, Washington | 18 hr |
| Jul 24, 1:37 PM MDT | Special Weather Statement | BOU | Boulder | 38 min |
| Jul 24, 1:52 PM MDT | Special Weather Statement | BOU | Jefferson | 38 min |
| Jul 24, 2:16 PM MDT | Special Weather Statement | BOU | Adams, Arapahoe | 44 min |
| Jul 24, 2:23 PM MDT | Flash Flood Warning | BOU | Larimer | 3 hr |
| Jul 24, 2:51 PM MDT | Special Weather Statement | BOU | Weld | 39 min |
| Jul 24, 3:01 PM MDT | Special Weather Statement | BOU | Adams, Arapahoe | 59 min |
| Jul 24, 3:06 PM MDT | Special Weather Statement | BOU | Morgan | 39 min |
| Jul 24, 3:34 PM MDT | Areal Flood Advisory | BOU | Morgan, Weld | 3 hr |
| Jul 24, 3:46 PM MDT | Special Weather Statement | BOU | Morgan | 44 min |
| Jul 24, 3:55 PM MDT | Areal Flood Advisory | BOU | Douglas | 3 hr |
| Jul 24, 4:22 PM MDT | Flash Flood Warning | BOU | Morgan | 3 hr |
| Jul 24, 4:43 PM MDT | Special Weather Statement | BOU | Morgan | 47 min |
| Jul 24, 5:10 PM MDT | Special Weather Statement | BOU | Washington | 50 min |
| Jul 24, 5:36 PM MDT | Severe Thunderstorm Warning | BOU | Washington | 39 min |
Nearby
Flash Flood Watches in Colorado, 2022Every flash flood watch 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.