Alert archive / Colorado / Flash Flood Watches in 2007
Flash Flood Watch 6, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this flash flood watch at Aug 3, 2007, 11:00 AM MDT for 12 counties in Colorado. It took effect at Aug 3, 2007, 11:41 AM MDT. It was in force for 9 hr.
The area
The counties it named.
The facts
- Issued
- Aug 3, 2007, 11:00 AM MDT (17:00 UTC)
- In effect from
- Aug 3, 2007, 11:41 AM MDT
- Expired
- Aug 3, 2007, 8:53 PM MDT
- In force
- 9 hr
- Issued by
- NWS Denver/Boulder, CO
- Flood severity
- None
Counties Adams County, CO, Arapahoe County, CO, Boulder County, CO, Broomfield County, CO, Clear Creek County, CO, Denver County, CO, Douglas County, CO, Gilpin County, CO, Jefferson County, CO, Larimer County, CO, Park County, CO, Weld County, CO
The radar
The Denver radar (KFTG), 46 km from the middle of the area, began a volume at 17:02 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 (KDNR), launched 12:00Z, 5.0 hours before the alert went out and 157 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
- 277 J/kg
- Mixed-layer CIN
- -177 J/kg
- Mixed-layer LCL
- 983 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- 63 m²/s²
- 0-3 km storm-relative helicity
- 88 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 Aug 3, 3:40 AM MDT, 7 hours 20 minutes earlier.
Area forecast discussion, Aug 3, 3:40 AM MDT, 7 hours 20 minutes before
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</html>The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 2, 7:17 PM MDT | Flash Flood Warning | BOU | Larimer | 3 hr |
| Aug 2, 8:43 PM MDT | Flash Flood Warning | BOU | Larimer | 3 hr |
| Aug 2, 11:13 PM MDT | Flash Flood Warning | BOU | Weld | 2 hr |
Nearby
Flash Flood Watches in Colorado, 2007Every flash flood watch in 2007
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.