Flash Flood Watch 1, NWS Denver/Boulder, CO

Issued

Jul 1, 2021, 8:46 AM MDT (14:46 UTC)

In effect from

Jul 1, 2021, 11:00 AM MDT

Expired

Jul 1, 2021, 8:16 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, Elbert County, CO, Gilpin County, CO, Jefferson County, CO, Larimer County, CO, Park County, CO, Weld County, CO

The Denver radar (KFTG), 39 km from the middle of the area, began a volume at 14:48 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.

669 
WGUS65 KBOU 011446
FFABOU

URGENT - IMMEDIATE BROADCAST REQUESTED
Flood Watch
National Weather Service Denver CO
846 AM MDT Thu Jul 1 2021

COZ035>041-020600-
/O.NEW.KBOU.FF.A.0001.210701T1700Z-210702T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
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-
Including the cities of Hartsel, Elbert, Westcreek, Arvada,
Central City, Red Feather Lakes, Larkspur, Bailey, Evergreen,
Georgetown, Glendevey, Nederland, Aurora, Fairplay, Littleton,
South Park, Boulder, Highlands Ranch, City of Denver, Loveland,
Kiowa, Estes Park, Longmont, Fondis, Denver International
Airport, Golden, Parker, Castle Rock, Lakewood, Fort Collins,
Nunn, Idaho Springs, Lake George, Hereford, and Brighton
846 AM MDT Thu Jul 1 2021

...FLASH FLOOD WATCH IN EFFECT THROUGH THIS EVENING...

The National Weather Service in Denver has issued a

* Flash Flood Watch for Portions of central, north central, and 
  northeast Colorado, including the following areas, in central 
  Colorado, Central and Southeast Park County and Jefferson and West 
  Douglas Counties Above 6000 Feet/Gilpin/Clear Creek/Northeast Park 
  Counties Below 9000 Feet. In north central Colorado, Larimer 
  County Below 6000 Feet/Northwest Weld County and Larimer and 
  Boulder Counties Between 6000 and 9000 Feet. In northeast 
  Colorado, Boulder And Jefferson Counties Below 6000 Feet/West 
  Broomfield County, Elbert/Central and East Douglas Counties Above 
  6000 Feet and North Douglas County Below 6000 Feet/Denver/West 
  Adams and Arapahoe Counties/East Broomfield County.

* Through this evening.

* Increasing moisture and instability today will lead to widespread 
  thunderstorm development by the early afternoon. Heavy rain and 
  flash flooding will be possible in these slow moving storms, 
  especially over burn areas.

* Rapid increases in water in creeks and small drainages could make 
  roads become quickly impassable.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

You should monitor later forecasts and be prepared to take action 
should Flash Flood Warnings be issued.

&&

$$

Hiris

133 
WGUS65 KBOU 020216
FFABOU

Flood Watch
National Weather Service Denver CO
816 PM MDT Thu Jul 1 2021

COZ035>041-020330-
/O.CAN.KBOU.FF.A.0001.000000T0000Z-210702T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
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-
Including the cities of Hartsel, Elbert, Westcreek, Arvada,
Central City, Red Feather Lakes, Larkspur, Bailey, Evergreen,
Georgetown, Glendevey, Nederland, Aurora, Fairplay, Littleton,
South Park, Boulder, Highlands Ranch, City of Denver, Loveland,
Kiowa, Estes Park, Longmont, Fondis, Denver International
Airport, Golden, Parker, Castle Rock, Lakewood, Fort Collins,
Nunn, Idaho Springs, Lake George, Hereford, and Brighton
816 PM MDT Thu Jul 1 2021

...FLASH FLOOD WATCH IS CANCELLED...

The Flash Flood Watch for Portions of central, north central, and 
northeast Colorado, including the following areas, in central 
Colorado, Central and Southeast Park County and Jefferson and West 
Douglas Counties Above 6000 Feet/Gilpin/Clear Creek/Northeast Park 
Counties Below 9000 Feet. In north central Colorado, Larimer County 
Below 6000 Feet/Northwest Weld County and Larimer and Boulder 
Counties Between 6000 and 9000 Feet. In northeast Colorado, Boulder 
And Jefferson Counties Below 6000 Feet/West Broomfield County, 
Elbert/Central and East Douglas Counties Above 6000 Feet and North 
Douglas County Below 6000 Feet/Denver/West Adams and Arapahoe 
Counties/East Broomfield County. has been cancelled.

Flash Flooding is no longer expected to pose a threat and the 
heaviest rain has moved well east of the watch area, currently along 
a line from Fort Morgan to Agate and moving east.

$$

Schlatter

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

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.