Alert archive / Colorado / Frost Advisories in 2019
Frost Advisory 5, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this frost advisory at Oct 2, 2019, 2:26 AM MDT for 12 counties in Colorado. It took effect at Oct 3, 2019, 2:00 AM MDT. It was in force for 6 hr.
The area
The counties it named.
The facts
- Issued
- Oct 2, 2019, 2:26 AM MDT (08:26 UTC)
- In effect from
- Oct 3, 2019, 2:00 AM MDT
- Expired
- Oct 3, 2019, 8:00 AM MDT
- In force
- 6 hr
- Issued by
- NWS Denver/Boulder, CO
Counties Adams County, CO, Arapahoe County, CO, Douglas County, CO, Elbert County, CO, Larimer County, CO, Lincoln County, CO, Logan County, CO, Morgan County, CO, Phillips County, CO, Sedgwick County, CO, Washington County, CO, Weld County, CO
The radar
The Denver radar (KFTG), 69 km from the middle of the area, began a volume at 08:25 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
N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 8.4 hours before the alert went out and 297 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
- 615 m above ground
- 0-6 km bulk shear
- 54 kt
- 0-1 km storm-relative helicity
- 27 m²/s²
- 0-3 km storm-relative helicity
- 202 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this frost 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 frost advisory went out at Oct 1, 4:04 PM MDT, 10 hours 22 minutes earlier.
Area forecast discussion, Oct 1, 4:04 PM MDT, 10 hours 22 minutes before
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</html>Hazardous weather outlook, Oct 1, 11:10 AM MDT, 15 hours 16 minutes before
Hazardous Weather Outlook National Weather Service Denver/Boulder CO 1110 AM MDT Tue Oct 1 2019 COZ030>051-021715- 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- 1110 AM MDT Tue Oct 1 2019 ...RED FLAG WARNING FOR THE HIGH MOUNTAIN VALLEYS AND PORTIONS OF THE NORTH CENTRAL MOUNTAINS INCLUDING SUMMIT COUNTY... This hazardous weather outlook is for northeast and north central Colorado. .DAY ONE...Today and Tonight The wind and humidities int he mountains and high valleys are already showing critical fire danger conditions late this morning. The areas included are North Park, Middle Park, Summit County, and South Park. Winds will gust to around 35 mph this afternoon with minimum humidities dropping to less than 10 percent on valley floors. Conditions will improve by sunset. A distinctly different airmass will prevail across the plains and foothills with cool and moist conditions. There will be a chance of light rain or rain showers over the plains later this afternoon well into the overnight period. .DAYS TWO THROUGH SEVEN...Wednesday through Monday Fire danger will remain high over the mountain valleys on Tuesday and Wednesday due to gusty and dry southwest winds. Meanwhile, fire danger will decrease significantly across the plains as a cool and moist airmass filters in. Scattered light rain showers can also be expected into Wednesday. Fire danger will likely remain elevated in the mountains through the end of the week with breezy conditions and low humidity. .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 2, 1:58 PM MDT | Fire Weather Watch | BOU | Boulder, Clear Creek, Douglas, Gilpin, Grand, Jackson and 4 more | 39 hr |
Nearby
Frost Advisories in Colorado, 2019Every frost advisory in 2019
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.