Alert archive / Montana / Wind Advisories in 2017
Wind Advisory 5, NWS Missoula, MT
NWS Missoula, MT issued this wind advisory at Oct 21, 2017, 2:30 PM MDT for 4 counties in Montana; Lemhi County, Idaho. It took effect at Oct 22, 2017, 6:00 AM MDT. It was in force for 14 hr.
The area
The counties it named.
The facts
- Issued
- Oct 21, 2017, 2:30 PM MDT (20:30 UTC)
- In effect from
- Oct 22, 2017, 6:00 AM MDT
- Expired
- Oct 22, 2017, 8:00 PM MDT
- In force
- 14 hr
- Issued by
- NWS Missoula, MT
Counties Lemhi County, ID, Deer Lodge County, MT, Granite County, MT, Powell County, MT, Silver Bow County, MT
The radar
The Missoula radar (KMSX), 127 km from the middle of the area, began a volume at 20:31 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
Great_falls, MT (KTFX), launched 12:00Z, 8.5 hours before the alert went out and 254 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
- 1524 m above ground
- 0-6 km bulk shear
- 10 kt
- 0-1 km storm-relative helicity
- 95 m²/s²
- 0-3 km storm-relative helicity
- 203 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
948 WWUS75 KMSO 212030 NPWMSO URGENT - WEATHER MESSAGE National Weather Service Missoula MT 230 PM MDT Sat Oct 21 2017 MTZ007-222100- /O.NEW.KMSO.WI.Y.0005.171022T1200Z-171023T0200Z/ Butte/Blackfoot Region- 230 PM MDT Sat Oct 21 2017 ...WIND ADVISORY IN EFFECT FROM 6 AM TO 8 PM MDT SUNDAY... The National Weather Service in Missoula has issued a Wind Advisory...which is in effect from 6 AM to 8 PM MDT Sunday. * Impacts/Timing: Winds will begin to increase in the morning, peaking between noon and 3pm. High profile vehicles may have difficulty due to strong cross winds, particularly along the I-90 corridor between Deerlodge and Anaconda. In the higher terrain, falling trees will be particularly hazardous in recent burn scars. * Winds: Southwest to west 15 to 25 mph with gusts up to 45 mph. Gusts over 50 mph will be possible in the higher terrain. * Locations impacted include: Butte, Georgetown Lake, Highway 12 Garrison to Elliston, Homestake Pass, and MacDonald Pass $$ MTZ003-222100- /O.NEW.KMSO.LW.Y.0007.171022T1200Z-171023T0200Z/ Flathead/Mission Valleys- 230 PM MDT Sat Oct 21 2017 ...LAKE WIND ADVISORY IN EFFECT FROM 6 AM TO 8 PM MDT SUNDAY... The National Weather Service in Missoula has issued a Lake Wind Advisory...which is in effect from 6 AM to 8 PM MDT Sunday. * Impacts/Timing: Gusty winds will develop late tonight, peaking between 11am and 2pm Sunday. Increased chop on Flathead Lake will cause difficult conditions for small water craft. * Winds: South winds around 15 mph in the morning becoming southwesterly 15 to 25 mph with gusts to near 40 mph possible by mid day. * Wave heights: 1 to 3 feet, locally up to 4 feet on the northeast side of the lake. * Locations impacted include: Flathead Lake, Flathead Valley, Mission Valley, and Polson PRECAUTIONARY/PREPAREDNESS ACTIONS... A Lake Wind Advisory indicates that winds will cause rough chop on area lakes. Small boats will be especially prone to capsizing. Note...The experimental wave height forecasts are representative of the mid lake waters and downwind shores. Wave heights may be significantly less on upwind shores. && $$
3 follow-up statements
351 WWUS75 KMSO 221055 NPWMSO URGENT - WEATHER MESSAGE National Weather Service Missoula MT 455 AM MDT Sun Oct 22 2017 IDZ007-221800- /O.NEW.KMSO.HW.W.0002.171022T1055Z-171022T1800Z/ Orofino/Grangeville Region- 355 AM PDT Sun Oct 22 2017 ...HIGH WIND WARNING IN EFFECT UNTIL 11 AM PDT THIS MORNING FOR THE CAMAS PRAIRIE...GRANGEVILLE AND HIGHWAY 95... The National Weather Service in Missoula has issued a High Wind Warning for the Camas Prairie...Grangeville and Highway 95... which is in effect until 11 AM PDT this morning. * Impacts/Timing: Strong wind gusts will be present through late this morning. Tree and infrastructure damage will be possible. Dangerous crosswinds will exist for area travelers. * Winds: South 30 to 40 mph...gusting to 60 mph. $$ MTZ007-230200- /O.CON.KMSO.WI.Y.0005.171022T1200Z-171023T0200Z/ Butte/Blackfoot Region- 455 AM MDT Sun Oct 22 2017 ...WIND ADVISORY REMAINS IN EFFECT UNTIL 8 PM MDT THIS EVENING... * Impacts/Timing: Winds will begin to increase in the morning, peaking between noon and 3pm. High profile vehicles may have difficulty due to strong cross winds, particularly along the I-90 corridor between Deerlodge and Anaconda. In the higher terrain, falling trees will be particularly hazardous in recent burn scars. * Winds: Southwest to west 15 to 25 mph with gusts up to 45 mph. Gusts over 50 mph will be possible in the higher terrain. * Locations impacted include: Butte, Georgetown Lake, Highway 12 Garrison to Elliston, Homestake Pass, and MacDonald Pass $$ MTZ003-230200- /O.CON.KMSO.LW.Y.0007.171022T1200Z-171023T0200Z/ Flathead/Mission Valleys- 455 AM MDT Sun Oct 22 2017 ...LAKE WIND ADVISORY REMAINS IN EFFECT UNTIL 8 PM MDT THIS EVENING... * Impacts/Timing: Gusty winds will develop late tonight, peaking between 11am and 2pm Sunday. Increased chop on Flathead Lake will cause difficult conditions for small water craft. * Winds: South winds around 15 mph in the morning becoming southwesterly 15 to 25 mph with gusts to near 40 mph possible by mid day. * Wave heights: 1 to 3 feet, locally up to 4 feet on the northeast side of the lake. * Locations impacted include: Flathead Lake, Flathead Valley, Mission Valley, and Polson PRECAUTIONARY/PREPAREDNESS ACTIONS... A Lake Wind Advisory indicates that winds will cause rough chop on area lakes. Small boats will be especially prone to capsizing. Note...The experimental wave height forecasts are representative of the mid lake waters and downwind shores. Wave heights may be significantly less on upwind shores. && $$
004 WWUS75 KMSO 221607 NPWMSO URGENT - WEATHER MESSAGE National Weather Service Missoula MT 1007 AM MDT Sun Oct 22 2017 IDZ007-221715- /O.CAN.KMSO.HW.W.0002.000000T0000Z-171022T1800Z/ Orofino/Grangeville Region- 907 AM PDT Sun Oct 22 2017 ...HIGH WIND WARNING IS CANCELLED FOR ... The National Weather Service in Missoula has cancelled the High Wind Warning. Breezy winds to 45 mph will continue over the Camas Prairie, however a general decrease in winds will continue through the afternoon and damage is no longer expected. $$ IDZ010-230200- /O.EXA.KMSO.WI.Y.0005.000000T0000Z-171023T0200Z/ Eastern Lemhi County- 1007 AM MDT Sun Oct 22 2017 ...WIND ADVISORY IN EFFECT UNTIL 8 PM MDT THIS EVENING... The National Weather Service in Missoula has issued a Wind Advisory...which is in effect until 8 PM MDT this evening. * Impacts/Timing: Winds will begin to increase late this morning, peaking between 1pm and 3pm. High profile vehicles may have difficulty due to strong cross winds, particularly along the Highway 28 corridor between Tendoy and Lone Pine and Highway 93 between Salmon and Ellis. * Winds: Southwest to west 20 to 30 mph with gusts up to 50 mph. Gusts over 50 mph will be possible in the higher terrain. * Locations impacted include: Bannock Pass, Highway 28 Tendoy to Lone Pine, Highway 93 Lost Trail Pass to Gibbonsville, Lemhi Pass, and Salmon $$ MTZ007-230200- /O.CON.KMSO.WI.Y.0005.000000T0000Z-171023T0200Z/ Butte/Blackfoot Region- 1007 AM MDT Sun Oct 22 2017 ...WIND ADVISORY REMAINS IN EFFECT UNTIL 8 PM MDT THIS EVENING... * Impacts/Timing: Winds will continue to increase, peaking between noon and 3pm. High profile vehicles may have difficulty due to strong cross winds, particularly along the I- 90 corridor between Deerlodge and Anaconda. In the higher terrain, falling trees will be particularly hazardous in recent burn scars. * Winds: Southwest to west 15 to 25 mph with gusts up to 45 mph. Gusts over 50 mph will be possible in the higher terrain. * Locations impacted include: Butte, Georgetown Lake, Highway 12 Garrison to Elliston, Homestake Pass, and MacDonald Pass $$ MTZ003-230200- /O.CON.KMSO.LW.Y.0007.000000T0000Z-171023T0200Z/ Flathead/Mission Valleys- 1007 AM MDT Sun Oct 22 2017 ...LAKE WIND ADVISORY REMAINS IN EFFECT UNTIL 8 PM MDT THIS EVENING... * Impacts/Timing: Gusty winds will peak between 11am and 2pm today. Increased chop on Flathead Lake will cause difficult conditions for small water craft. * Winds: South winds around 15 mph becoming southwesterly 15 to 25 mph with gusts to near 40 mph possible by mid day. * Wave heights: 1 to 3 feet, locally up to 4 feet on the northeast side of the lake. * Locations impacted include: Flathead Lake, Flathead Valley, Mission Valley, and Polson PRECAUTIONARY/PREPAREDNESS ACTIONS... A Lake Wind Advisory indicates that winds will cause rough chop on area lakes. Small boats will be especially prone to capsizing. Note...The experimental wave height forecasts are representative of the mid lake waters and downwind shores. Wave heights may be significantly less on upwind shores. && $$
724 WWUS75 KMSO 230158 NPWMSO URGENT - WEATHER MESSAGE National Weather Service Missoula MT 758 PM MDT Sun Oct 22 2017 MTZ007-230300- /O.EXP.KMSO.WI.Y.0005.000000T0000Z-171023T0200Z/ Butte/Blackfoot Region- 758 PM MDT Sun Oct 22 2017 ...WIND ADVISORY WILL EXPIRE AT 8 PM MDT THIS EVENING... The strong winds have diminished now that the sun has set, but breezy conditions will continue over the Butte Blackfoot region for a few more hours this evening. $$ IDZ010-230300- /O.EXP.KMSO.WI.Y.0005.000000T0000Z-171023T0200Z/ Eastern Lemhi County- 758 PM MDT Sun Oct 22 2017 ...WIND ADVISORY WILL EXPIRE AT 8 PM MDT THIS EVENING... The strong winds have diminished now that the sun has set, but breezy conditions will continue over the Leadore and Gilmore region for a few more hours this evening. $$ MTZ003-230300- /O.EXP.KMSO.LW.Y.0007.000000T0000Z-171023T0200Z/ Flathead/Mission Valleys- 758 PM MDT Sun Oct 22 2017 ...LAKE WIND ADVISORY WILL EXPIRE AT 8 PM MDT THIS EVENING... The strong winds have diminished now that the sun has set, but breezy conditions will continue over Flathead lake for a few more hours this evening. $$
The office that day
Everything else NWS Missoula, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 21, 2:30 PM MDT | Lake Wind Advisory | MSO | Flathead, Lake, Sanders | 30 hr |
Nearby
Wind Advisories in Montana, 2017Wind Advisories in Idaho, 2017Every wind advisory 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.