Alert archive / Colorado / Winter Storm Warnings in 2023
Winter Storm Warning 10, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this winter storm warning at Apr 2, 2023, 1:49 PM MDT for 4 counties in Colorado. It took effect at Apr 3, 2023, 12:00 PM MDT. It was in force for 36 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
- Apr 2, 2023, 1:49 PM MDT (19:49 UTC)
- In effect from
- Apr 3, 2023, 12:00 PM MDT
- Expired
- Apr 5, 2023, 12:00 AM MDT
- In force
- 36 hr
- Issued by
- NWS Denver/Boulder, CO
Counties Boulder County, CO, Grand County, CO, Jackson County, CO, Larimer County, CO
The radar
The Cheyenne radar (KCYS), 121 km from the middle of the area, began a volume at 19:49 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 12:00Z, 7.8 hours before the alert went out and 268 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2539 m above ground
- 0-6 km bulk shear
- 64 kt
- 0-1 km storm-relative helicity
- 153 m²/s²
- 0-3 km storm-relative helicity
- 285 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 Apr 2, 11:39 AM MDT, 2 hours 10 minutes earlier.
Area forecast discussion, Apr 2, 11:39 AM MDT, 2 hours 10 minutes before
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</html>Hazardous weather outlook, Apr 2, 11:03 AM MDT, 2 hours 46 minutes before
Hazardous Weather Outlook National Weather Service Denver/Boulder CO 1103 AM MDT Sun Apr 2 2023 COZ030>051-031715- 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- 1103 AM MDT Sun Apr 2 2023 This hazardous weather outlook is for northeast and north central Colorado. .DAY ONE...This Afternoon and Tonight Today, critical and elevated fire weather conditions are expected across much of the plains, urban corridor, foothills and Park County. A Red Flag Warning is in effect for South Park, the Palmer Divide, adjacent plains south and east, and the Denver metro valid from 11 AM to 8 PM MDT, where gusts generally 25 to 35 mph will coincide with minimum humidity of 10 to 20 percent. It will be windy across the high country with gusts generally 50 to 60 mph across the mountains and higher foothills and up to about 70 mph for the exposed peaks. This evening, light snow showers return to the northern mountains, favoring the Park Range. A Winter Storm Watch is in effect beginning this evening. .DAYS TWO THROUGH SEVEN...Monday through Saturday Expect near critical to critical fire weather conditons on Monday afternoon over the Palmer Divide region with gusty winds and low humidities. Snow will return to the mountains on Monday and Tuesday with winter driving conditons, and there will be a chance of rain or snow showers at lower elevations from Monday night through Thursday. Expect much colder temperatures and gusty northerly winds on Tuesday. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed. Any reports of strong winds will be appreciated.
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 2, 3:50 AM MDT | Fire Weather Watch | BOU | Arapahoe, Clear Creek, Douglas, Elbert, Gilpin, Jefferson and 2 more | 24 hr |
Nearby
Winter Storm Warnings in Colorado, 2023Every winter storm warning in 2023
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.