Alert archive / Colorado / High Wind Warnings in 2017
High Wind Warning 12, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this high wind warning at Nov 4, 2017, 5:02 AM MDT for Arapahoe County, Douglas County, Elbert County, Colorado. It took effect at Nov 4, 2017, 6:00 AM MDT. It was in force for 12 hr. 2 reports 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
- Nov 4, 2017, 5:02 AM MDT (11:02 UTC)
- In effect from
- Nov 4, 2017, 6:00 AM MDT
- Expired
- Nov 4, 2017, 6:00 PM MDT
- In force
- 12 hr
- Issued by
- NWS Denver/Boulder, CO
Counties Arapahoe County, CO, Douglas County, CO, Elbert County, CO
The radar
The Denver radar (KFTG), 41 km from the middle of the area, began a volume at 11:06 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 |
|---|---|---|---|
| Nov 4, 11:54 AM MDT | NON-TSTM WND GST 61 | 5 W Elbert, CO | AWOS STATION MNH, 5 W ELBERT. |
| Nov 4, 12:12 PM MDT | NON-TSTM WND GST 66 | 5 W Elbert, CO | KMNH AWOS |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Denver, CO (KDEN), launched 00:00Z, 11.0 hours before the alert went out and 117 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
- 2567 m above ground
- 0-6 km bulk shear
- 82 kt
- 0-1 km storm-relative helicity
- 44 m²/s²
- 0-3 km storm-relative helicity
- 108 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
404 WWUS75 KBOU 041102 NPWBOU URGENT - WEATHER MESSAGE National Weather Service Denver/Boulder CO 502 AM MDT Sat Nov 4 2017 ...STRONG WINDS ON THE PALMER DIVIDE TODAY... .Strong southwest winds aloft over Colorado today are expected to mix to the surface over the Palmer Divide region this morning and continue through much of the afternoon. Strong crosswinds could make travel difficult along I-25 and across eastern Douglas and western Elbert County roadways. Areas of blowing dust will also be possible. Trees and branches may also be blown down by the strong winds. Winds are expected to begin diminishing after about 3 PM MDT. COZ041-041915- /O.NEW.KBOU.HW.W.0012.171104T1200Z-171104T2100Z/ Elbert/Central and East Douglas Counties Above 6000 Feet- Including the cities of Castle Rock, Elbert, Fondis, Kiowa, and Larkspur 502 AM MDT Sat Nov 4 2017 ...HIGH WIND WARNING IN EFFECT UNTIL 3 PM MDT THIS AFTERNOON... The National Weather Service in Denver has issued a High Wind Warning, which is in effect until 3 PM MDT this afternoon. * TIMING...Winds will increase after 8 AM MDT and continue into the mid-afternoon. Winds will begin diminishing by late afternoon. * WINDS...Southwest winds increasing to 35 to 45 mph with gusts of 60 to 70 mph at times. * IMPACTS...Travel on I-25 and other roadways may be difficult due to strong crosswinds and restricted visibilities in blowing dust. Trees and branches may break in the strong winds. PRECAUTIONARY/PREPAREDNESS ACTIONS... A High Wind Warning means a hazardous high wind event is expected or occurring. Sustained wind speeds of at least 40 mph or gusts of 58 mph or more can lead to property damage. && $$
3 follow-up statements
704 WWUS75 KBOU 041843 NPWBOU URGENT - WEATHER MESSAGE National Weather Service Denver/Boulder CO 1243 PM MDT Sat Nov 4 2017 ...STRONG WINDS ON THE PALMER DIVIDE... .Strong winds have developed across the Palmer Divide this afternoon. Locations near the Palmer Divide between Larkspur, Monument Hill, and Elbert have been gusting to between 45 and 66 mph. Strong crosswinds will make travel difficult along I-25 and across eastern Douglas and Elbert Counties. Areas of blowing dust will also be possible near open fields. Trees and branches may also be blown down by the strong winds. Winds are expected to begin diminishing late this afternoon. COZ041-042100- /O.CON.KBOU.HW.W.0012.000000T0000Z-171104T2100Z/ Elbert/Central and East Douglas Counties Above 6000 Feet- 1243 PM MDT Sat Nov 4 2017 ...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 3 PM MDT THIS AFTERNOON... * TIMING...Strong winds will continue through mid to late afternoon, and then begin to slowly subside through early evening. * WINDS...Southwest winds to 30 to 45 mph with peak gusts of 60 to 70 mph. * IMPACTS...Travel on I-25 and other roadways may be difficult due to strong crosswinds. Visibilities may be restricted near open fields due to blowing dust. Trees and branches may break in the strong winds. PRECAUTIONARY/PREPAREDNESS ACTIONS... A High Wind Warning means a hazardous high wind event is expected or occurring. Sustained wind speeds of at least 40 mph or gusts of 58 mph or more can lead to property damage. && $$
296 WWUS75 KBOU 042047 NPWBOU URGENT - WEATHER MESSAGE National Weather Service Denver/Boulder CO 247 PM MDT Sat Nov 4 2017 ...STRONG WINDS ON THE PALMER DIVIDE... .Strong winds have developed across the Palmer Divide this afternoon. Locations near the Palmer Divide between Larkspur, Monument Hill, and Elbert have been gusting to between 45 and 66 mph. Strong crosswinds will make travel difficult along I- 25 and across eastern Douglas and Elbert Counties. Areas of blowing dust will also be possible near open fields. Trees and branches may also be blown down by the strong winds. Winds are expected to begin diminishing late this afternoon. COZ041-050000- /O.EXT.KBOU.HW.W.0012.000000T0000Z-171105T0000Z/ Elbert/Central and East Douglas Counties Above 6000 Feet- 247 PM MDT Sat Nov 4 2017 ...HIGH WIND WARNING NOW IN EFFECT UNTIL 6 PM MDT THIS EVENING... * TIMING...Strong winds will continue through late afternoon, and then subside through early evening. * WINDS...Southwest winds to 30 to 45 mph with peak gusts near 65 mph. * IMPACTS...Travel on I-25 and other roadways may be difficult due to strong crosswinds. Visibilities may be restricted near open fields due to blowing dust. Trees and branches may break in the strong winds. PRECAUTIONARY/PREPAREDNESS ACTIONS... A High Wind Warning means a hazardous high wind event is expected or occurring. Sustained wind speeds of at least 40 mph or gusts of 58 mph or more can lead to property damage. && $$
382 WWUS75 KBOU 050000 NPWBOU URGENT - WEATHER MESSAGE National Weather Service Denver/Boulder CO 600 PM MDT Sat Nov 4 2017 COZ041-050100- /O.EXP.KBOU.HW.W.0012.000000T0000Z-171105T0000Z/ Elbert/Central and East Douglas Counties Above 6000 Feet- 600 PM MDT Sat Nov 4 2017 ...HIGH WIND WARNING WILL EXPIRE AT 6 PM MDT THIS EVENING... Winds were decreasing across the Palmer Divide early this evening. Southwest winds of 15 to 25 mph with gusts to 35 mph can be expected for the rest of the evening, and then winds will become light late tonight. A peak gust of 66 mph was recorded west of Elbert early this afternoon. Gusts of 45 to 55 mph were common through the late morning and afternoon. $$
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 4, 4:46 AM MDT | Winter Storm Warning | BOU | Boulder, Grand, Jackson, Larimer | 48 hr |
Nearby
High Wind Warnings in Colorado, 2017Every high wind warning in 2017
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.