Alert archive / Colorado / High Wind Warnings in 2020
High Wind Warning 9, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this high wind warning at Oct 16, 2020, 1:37 PM MDT for 9 counties in Colorado. It took effect at Oct 17, 2020, 12:00 AM MDT. It was in force for 9 hr. 1 report came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Oct 16, 2020, 1:37 PM MDT (19:37 UTC)
- In effect from
- Oct 17, 2020, 12:00 AM MDT
- Expired
- Oct 17, 2020, 9:00 AM MDT
- In force
- 9 hr
- Issued by
- NWS Denver/Boulder, CO
Counties Boulder County, CO, Clear Creek County, CO, Gilpin County, CO, Grand County, CO, Jackson County, CO, Jefferson County, CO, Larimer County, CO, Park County, CO, Summit County, CO
The radar
The Denver radar (KFTG), 102 km from the middle of the area, began a volume at 19:36 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 was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Oct 17, 4:29 AM MDT | NON-TSTM WND GST 76 | 3 Se Tolland, CO | DAKOTA HILL. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Denver, CO (KDNR), launched 12:00Z, 7.6 hours before the alert went out and 213 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
- 1365 m above ground
- 0-6 km bulk shear
- 76 kt
- 0-1 km storm-relative helicity
- 142 m²/s²
- 0-3 km storm-relative helicity
- 345 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
789 WWUS75 KBOU 161937 NPWBOU URGENT - WEATHER MESSAGE National Weather Service Denver/Boulder CO 137 PM MDT Fri Oct 16 2020 COZ033-034-170345- /O.NEW.KBOU.HW.W.0009.201017T0600Z-201017T1500Z/ 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- Including Cameron Pass, Laramie and Medicine Bow Mountains, Rabbit Ears Range, Rocky Mountain National Park, Willow Creek Pass, Berthoud Pass, Breckenridge, East Slopes Mosquito Range, East Slopes Southern Gore Range, Eisenhower Tunnel, Indian Peaks, Kenosha Mountains, Mount Evans, Williams Fork Mountains, and Winter Park 137 PM MDT Fri Oct 16 2020 ...HIGH WIND WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM MDT SATURDAY... * WHAT...West winds 35 to 50 mph with gusts up to 80 mph expected. * WHERE...Rocky Mountain National Park and the Medicine Bow Range and The Mountains of Summit County, the Mosquito Range, and the Indian Peaks above 9,000 feet elevation. * WHEN...From midnight tonight to 9 AM MDT Saturday. * IMPACTS...Strong winds will blow around unsecured objects. Travel will be difficult for high profile vehicles. New and existing fires will spread rapidly. * ADDITIONAL DETAILS...There is also a Red Flag Warning in effect through 6 PM Saturday. This High Wind Warning is in effect to highlight the timing and intensity of the strongest winds. Winds will remain strong but below high wind warning criteria throughout the day Saturday, and over a larger region as highlighted by the Red Flag Warning.. PRECAUTIONARY/PREPAREDNESS ACTIONS... Hazardous driving conditions due to powerful cross winds will pose a serious risk for drivers, especially for light weight and high profile vehicles. Loose outdoor items should be brought inside or secured properly. && $$
2 follow-up statements
699 WWUS75 KBOU 170340 NPWBOU URGENT - WEATHER MESSAGE National Weather Service Denver/Boulder CO 940 PM MDT Fri Oct 16 2020 COZ033-034-171500- /O.CON.KBOU.HW.W.0009.201017T0600Z-201017T1500Z/ South and East Jackson/Larimer/North and Northeast Grand/ Northwest Boulder Counties Above 9000 Feet- South and Southeast Grand/West Central and Southwest Boulder/ Gilpin/Clear Creek/Summit/North and West Park Counties Above 9000 Feet- Including Cameron Pass, Laramie and Medicine Bow Mountains, Rabbit Ears Range, Rocky Mountain National Park, Willow Creek Pass, Berthoud Pass, Breckenridge, East Slopes Mosquito Range, East Slopes Southern Gore Range, Eisenhower Tunnel, Indian Peaks, Kenosha Mountains, Mount Evans, Williams Fork Mountains, and Winter Park 940 PM MDT Fri Oct 16 2020 ...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 9 AM MDT SATURDAY... * WHAT...West winds 35 to 50 mph with gusts up to 80 mph expected. * WHERE...Rocky Mountain National Park and the Medicine Bow Range and The Mountains of Summit County, the Mosquito Range, and the Indian Peaks above 9,000 feet elevation. * WHEN...From midnight tonight to 9 AM MDT Saturday. * IMPACTS...Strong winds will blow around unsecured objects. Travel will be difficult for high profile vehicles. New and existing fires will spread rapidly. * ADDITIONAL DETAILS...There is also a Red Flag Warning in effect through 6 PM Saturday. This High Wind Warning is in effect to highlight the timing and intensity of the strongest winds. Winds will remain strong but below high wind warning criteria throughout the day Saturday, and over a larger region as highlighted by the Red Flag Warning. PRECAUTIONARY/PREPAREDNESS ACTIONS... Hazardous driving conditions due to powerful cross winds will pose a serious risk for drivers, especially for light weight and high profile vehicles. Loose outdoor items should be brought inside or secured properly. && $$
471 WWUS75 KBOU 171504 NPWBOU URGENT - WEATHER MESSAGE National Weather Service Denver/Boulder CO 904 AM MDT Sat Oct 17 2020 COZ033-034-171615- /O.EXP.KBOU.HW.W.0009.000000T0000Z-201017T1500Z/ 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- Including Cameron Pass, Laramie and Medicine Bow Mountains, Rabbit Ears Range, Rocky Mountain National Park, Willow Creek Pass, Berthoud Pass, Breckenridge, East Slopes Mosquito Range, East Slopes Southern Gore Range, Eisenhower Tunnel, Indian Peaks, Kenosha Mountains, Mount Evans, Williams Fork Mountains, and Winter Park 904 AM MDT Sat Oct 17 2020 ...HIGH WIND WARNING HAS EXPIRED... Wind has subsided below high wind warning levels, and the High Wind Warning has been allowed to expire. Winds will remain strong however, with gusts of 35 to 45 mph continuing through the afternoon. $$
Nearby
High Wind Warnings in Colorado, 2020Every high wind warning in 2020
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.