Areal Flood Advisory 101, NWS Denver/Boulder, CO

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Hazardous Weather Outlook
National Weather Service Denver/Boulder CO
1030 AM MDT Wed Jul 21 2021

COZ030>051-221630-
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-
1030 AM MDT Wed Jul 21 2021

This hazardous weather outlook is for northeast and north central
Colorado.

.DAY ONE...Today and Tonight

Thunderstorms capable of producing heavy rain will be possible
over the higher terrain this afternoon. This may lead to an
elevated risk of flash flooding in the Cameron Peak, East
Troublesome, and Williams Fork burn areas. Scattered thunderstorms
will also impact the I-25 corridor later this afternoon and
evening. A few of the storms could produce locally heavy
rainfall.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday

Thursday and into early next week, there will be a daily chance
of showers and storms. The coverage of these storms will be
highest on Friday and Saturday with lower coverage Thursday and
Sunday into next week. The storms will favor the higher terrain
although some spread onto the adjacent plains as well. The
primary threat with any thunderstorms will be locally heavy
rainfall which could result in flash flooding in the burn areas.
The Cameron Peak burn area is of particular concern on Friday
with an elevated threat for flash flooding.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed today or tonight, however,
rainfall reports from the burn scars would be appreciated.

Special Weather Statement
National Weather Service Denver CO
244 PM MDT Wed Jul 21 2021

COZ037-212130-
Central and Southeast Park County CO-
244 PM MDT Wed Jul 21 2021

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN PARK COUNTY UNTIL
330 PM MDT...

At 242 PM MDT, Doppler radar was tracking a strong thunderstorm 4
miles east of Elevenmile Canyon Reservoir, or 35 miles west of
Colorado Springs, moving northeast at 10 mph.

Nickel size hail will be possible with this storm.

Locations impacted include...
Lake George and Elevenmile Canyon Reservoir.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional
information and possible warnings from the National Weather Service.

Get out of the water and move indoors or inside a vehicle. Remember,
lightning can strike out to 10 miles from the parent thunderstorm.
If you can hear thunder, you are close enough to be struck by
lightning. Move to safe shelter now! Do not be caught on the water
in a thunderstorm.

&&

LAT...LON 3876 10567 3901 10551 3905 10533 3877 10535
TIME...MOT...LOC 2042Z 225DEG 9KT 3888 10541

COOPER