Alert archive / Colorado / Flash Flood Watches in 2012
Flash Flood Watch 2, NWS Grand Junction, CO
NWS Grand Junction, CO issued this flash flood watch at Aug 22, 2012, 8:55 PM MDT for 18 counties in Colorado; Grand County, San Juan County, Uintah County, Utah. It took effect at Aug 23, 2012, 12:00 PM MDT. It was in force for 30 hr.
The area
The counties it named.
The facts
- Issued
- Aug 22, 2012, 8:55 PM MDT (02:55 UTC)
- In effect from
- Aug 23, 2012, 12:00 PM MDT
- Expired
- Aug 24, 2012, 6:00 PM MDT
- In force
- 30 hr
- Issued by
- NWS Grand Junction, CO
- Flood severity
- None
All 21 counties
Archuleta County, CO, Delta County, CO, Dolores County, CO, Eagle County, CO, Garfield County, CO, Gunnison County, CO, Hinsdale County, CO, La Plata County, CO, Mesa County, CO, Moffat County, CO, Montezuma County, CO, Montrose County, CO, Ouray County, CO, Pitkin County, CO, Rio Blanco County, CO, Routt County, CO, San Juan County, CO, San Miguel County, CO, Grand County, UT, San Juan County, UT, Uintah County, UT
The nearest sounding before it
Albuquerq/Krtlnd, NM (KABQ), launched 00:00Z, 2.9 hours before the alert went out and 424 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
- 2183 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 33 m²/s²
- 0-3 km storm-relative helicity
- 74 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 Grand Junction, CO wrote its last area forecast discussion before this flash flood watch went out at Aug 22, 2:59 PM MDT, 5 hours 56 minutes earlier.
Area forecast discussion, Aug 22, 2:59 PM MDT, 5 hours 56 minutes before
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</html>The office that day
Everything else NWS Grand Junction, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 23, 1:33 PM MDT | Flash Flood Warning | GJT | Montezuma | 3 hr |
| Aug 23, 3:17 PM MDT | Areal Flood Advisory | GJT | Archuleta, Dolores, Hinsdale, La Plata, Montezuma, Montrose and 3 more | 3 hr |
| Aug 23, 5:55 PM MDT | Areal Flood Advisory | GJT | Delta, Dolores, Gunnison, Hinsdale, Mesa, Montrose and 3 more | 6 hr |
| Aug 23, 10:52 AM MDT | Flash Flood Warning | GJT | San Juan | 3 hr |
| Aug 23, 10:53 AM MDT | Flash Flood Warning | GJT | San Juan | 3 hr |
| Aug 23, 11:31 AM MDT | Flash Flood Warning | GJT | San Juan | 3 hr |
Nearby
Flash Flood Watches in Colorado, 2012Flash Flood Watches in Utah, 2012Every flash flood watch in 2012
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.