Alert archive / Colorado / Flash Flood Watches in 2021

Flash Flood Watch 26, NWS Grand Junction, CO

August 1, 202118 counties in Colorado; Grand County, San Juan County, Uintah County, Utah

NWS Grand Junction, CO issued this flash flood watch at Aug 1, 2021, 3:05 AM MDT for 18 counties in Colorado; Grand County, San Juan County, Uintah County, Utah. It took effect at Aug 1, 2021, 12:00 PM MDT. It was in force for 9 hr.

The area

The counties it named.

The facts

Issued
Aug 1, 2021, 3:05 AM MDT (09:05 UTC)
In effect from
Aug 1, 2021, 12:00 PM MDT
Expired
Aug 1, 2021, 9:00 PM MDT
In force
9 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 radar

The Grand Junction radar (KGJX), 44 km from the middle of the area, began a volume at 09:05 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 office that day

Everything else NWS Grand Junction, CO issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 31, 6:11 PM MDTFlash Flood Warning Considerable damage threatGJTGarfield, Mesa109 min
Jul 31, 7:00 PM MDTFlash Flood Warning Considerable damage threatGJTGarfield, Mesa2 hr
Aug 1, 11:34 AM MDTSpecial Weather StatementGJTMesa26 min
Aug 1, 1:25 PM MDTFlash Flood WatchGJTArchuleta, Delta, Dolores, Eagle, Garfield, Gunnison and 12 more35 hr
Aug 1, 2:49 PM MDTAreal Flood AdvisoryGJTGarfield, Mesa3 hr
Aug 1, 3:20 PM MDTSpecial Weather StatementGJTGarfield40 min
Aug 1, 4:34 PM MDTAreal Flood AdvisoryGJTDelta, Mesa116 min
Aug 1, 12:36 PM MDTSpecial Weather StatementGJTGrand39 min

Nearby

Flash Flood Watches in Colorado, 2021Flash Flood Watches in Utah, 2021Every flash flood watch in 2021

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.