Alert archive / Colorado / Winter Storm Warnings in 2022

Winter Storm Warning 8, NWS Denver/Boulder, CO

October 22, 2022Grand County, Jackson County, Colorado

NWS Denver/Boulder, CO issued this winter storm warning at Oct 22, 2022, 2:23 AM MDT for Grand County, Jackson County, Colorado. It took effect at Oct 23, 2022, 12:00 AM MDT. It was in force for 27 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Oct 22, 2022, 2:23 AM MDT (08:23 UTC)
In effect from: Oct 23, 2022, 12:00 AM MDT
Expired: Oct 24, 2022, 3:17 AM MDT
In force: 27 hr
Issued by: NWS Denver/Boulder, CO

Counties Grand County, CO, Jackson County, CO

The radar

The Cheyenne radar (KCYS), 147 km from the middle of the area, began a volume at 08:22 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 nearest sounding before it

Grand Junction, CO (KGJT), launched 00:00Z, 8.4 hours before the alert went out and 239 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 5290 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 35 m²/s²
0-3 km storm-relative helicity: 55 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this winter storm warning 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 winter storm warning went out at Oct 21, 11:38 PM MDT, 2 hours 45 minutes earlier.

Area forecast discussion, Oct 21, 11:38 PM MDT, 2 hours 45 minutes before

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Hazardous weather outlook, Oct 21, 10:44 AM MDT, 15 hours 39 minutes before

Hazardous Weather Outlook
National Weather Service Denver/Boulder CO
1044 AM MDT Fri Oct 21 2022

COZ030>051-221645-
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-
1044 AM MDT Fri Oct 21 2022

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

.DAY ONE...Today and Tonight

Warm and very dry conditions will prevail again today. Elevated to
critical fire weather conditions are expected over much of the
area this afternoon with low humidities and gusty winds. Winds
will diminish over the plains this evening but gusty winds will
continue in the mountains over night with speeds up to 60 mph.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday

Warm, dry, and breezy weather on Saturday may result in critical
fire weather conditions during the afternoon across the eastern
plains.

A strong storm system will move across our forecast area on
Sunday. This system will create gusty winds up to 50 mph across
the eastern plains which may lead to blowing dust. Critical fire
weather conditions are possible again due to the mild, dry, and
windy conditions.

The mountains will see moderate snow amounts Saturday night through
Monday with slick travel conditions expected, especially over the
mountain passes. Light precipitation is possible across the I-25
corridor and eastern plains Sunday evening and into Monday behind
the passage of a strong cold front. These areas could see a mix
of rain and snow showers during this period.

The next system arrives on Thursday bringing mountain snowfall
and possibly mixed precipitation to the plains.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed today or tonight.

The office that day

Everything else NWS Denver/Boulder, CO issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Oct 22, 2:23 AM MDT	Winter Weather Advisory	BOU	Boulder, Clear Creek, Gilpin, Grand, Jackson, Jefferson and 3 more	49 hr
Oct 22, 1:58 PM MDT	Red Flag Warning	BOU	Adams, Arapahoe, Douglas, Elbert, Lincoln, Washington	29 hr
Oct 22, 2:07 PM MDT	Freeze Watch	BOU	Adams, Arapahoe, Boulder, Broomfield, Denver, Douglas and 5 more	24 hr
Oct 22, 2:07 PM MDT	High Wind Watch	BOU	Elbert, Lincoln	12 hr

Nearby

Winter Storm Warnings in Colorado, 2022 Every winter storm warning in 2022

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; radar from the NEXRAD Level II archive.