Alert archive / Colorado / Areal Flood Advisories in 2021

Areal Flood Advisory 1, NWS Denver/Boulder, CO

April 6, 2021Larimer County, Colorado

NWS Denver/Boulder, CO issued this areal flood advisory at Apr 6, 2021, 1:57 PM MDT for Larimer County, Colorado. It was in force for 93 min.

The area

The counties it named.

The facts

Issued
Apr 6, 2021, 1:57 PM MDT (19:57 UTC)
Expired
Apr 6, 2021, 3:30 PM MDT
In force
93 min
Issued by
NWS Denver/Boulder, CO
Area
Storm-based polygon

County Larimer County, CO

The radar

The Cheyenne radar (KCYS), 77 km from the middle of the area, began a volume at 20:01 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.

What forecasters said that day

The local office's own words before this areal flood advisory 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 areal flood advisory went out at Apr 6, 9:38 AM MDT, 4 hours 19 minutes earlier.

Area forecast discussion, Apr 6, 9:38 AM MDT, 4 hours 19 minutes before
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Hazardous weather outlook, Apr 6, 10:02 AM MDT, 3 hours 55 minutes before
Hazardous Weather Outlook
National Weather Service Denver/Boulder CO
1002 AM MDT Tue Apr 6 2021

COZ030>051-071615-
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-
1002 AM MDT Tue Apr 6 2021

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

.DAY ONE...Today and Tonight

Scattered showers and isolated will spread across the area this
afternoon and evening. A couple showers or an isolated
thunderstorm may produce up to a quarter inch of rain on some of
the lower slopes of the Cameron Peak fire, but no flooding is
anticipated.

The snow level will initially be around 8000 feet early this
afternoon, and then drop to around 5000 feet overnight. Snow
accumulations of 1 to 3 inches can be expected in most mountain
areas, with a dusting possible on the grass in lower elevations.
Most of the precipitation will shift east of the I-25 Corridor by
early to mid evening, while showers continue across the mountains
overnight. Temperatures should get cold enough to allow for some
light slush or snow accumulation on roads over the higher
mountains tonight.

Strong and gusty winds will also develop across the plains through
the afternoon and continue tonight. Peak gusts may reach 50 mph or
greater around Limon and points south. Travelers, including those
on I-70 in the Limon area, should be prepared for possible
blowing dust and locally reduced visibility.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday

Expect strong and gusty northwest winds up to 55 mph in the wake
of a storm system intensifying across Kansas on Wednesday morning.
The strongest winds will be across the far northeast plains and across
Washington, Elbert and Lincoln counties. There will be lingering
snow showers across the mountains and a few rain and snow showers
Wednesday morning across the far northeast plains.

On Thursday, elevated fire danger is possible during the
afternoon hours with lowering humidities and gusty northwest
winds. Another weak system will bring cooler temperatures yet
continued gusty winds on Friday. Saturday will be dry and warmer
then another system will usher in cooler temperatures and gusty
winds for Sunday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed. However, any reports of
rain accumulation in or near the Cameron Peak Fire or blowing
dust on the eastern plains would be appreciated.

Nearby

Areal Flood Advisories in Colorado, 2021Every areal flood advisory 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.