Alert archive / Montana / Wind Advisories in 2018
Wind Advisory 3, NWS Missoula, MT
NWS Missoula, MT issued this wind advisory at Apr 20, 2018, 1:53 PM MDT for 8 counties in Montana. It took effect at Apr 21, 2018, 12:00 PM MDT. It was in force for 9 hr.
The area
The counties it named.
The facts
- Issued
- Apr 20, 2018, 1:53 PM MDT (19:53 UTC)
- In effect from
- Apr 21, 2018, 12:00 PM MDT
- Expired
- Apr 21, 2018, 9:00 PM MDT
- In force
- 9 hr
- Issued by
- NWS Missoula, MT
Counties Deer Lodge County, MT, Flathead County, MT, Granite County, MT, Lake County, MT, Missoula County, MT, Powell County, MT, Sanders County, MT, Silver Bow County, MT
The radar
The Missoula radar (KMSX), 25 km from the middle of the area, began a volume at 19:55 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
Spokane, WA (KOTX), launched 12:00Z, 7.9 hours before the alert went out and 221 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
- 1943 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 7 m²/s²
- 0-3 km storm-relative helicity
- 48 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
801 WWUS75 KMSO 201953 NPWMSO URGENT - WEATHER MESSAGE National Weather Service Missoula MT 153 PM MDT Fri Apr 20 2018 MTZ003-212000- /O.NEW.KMSO.WI.Y.0003.180421T1800Z-180422T0300Z/ Flathead/Mission Valleys- 153 PM MDT Fri Apr 20 2018 ...WIND ADVISORY IN EFFECT FROM NOON TO 9 PM MDT SATURDAY... The National Weather Service in Missoula has issued a Wind Advisory...which is in effect from noon to 9 PM MDT Saturday. * Impacts/Timing: Tree falls, power outages, hazardous driving conditions due to crosswinds, choppy wave activity on Flathead Lake during Saturday afternoon and early evening. * Winds: West winds 20 to 30 mph gusting to 45 mph by early afternoon. * Wave heights: 1 to 3 foot waves on Flathead Lake. * Locations impacted include: Flathead Lake, Flathead Valley, Mission Valley, and Polson $$ MTZ007-043-212000- /O.NEW.KMSO.WI.Y.0003.180421T1800Z-180422T0300Z/ Butte/Blackfoot Region-Potomac/Seeley Lake Region- 153 PM MDT Fri Apr 20 2018 ...WIND ADVISORY IN EFFECT FROM NOON TO 9 PM MDT SATURDAY... The National Weather Service in Missoula has issued a Wind Advisory...which is in effect from noon to 9 PM MDT Saturday. * Impacts/Timing: Tree falls, power outages, hazardous driving conditions due to crosswinds along Highway 12 and Highway 200 corridors Saturday afternoon and early evening. * Winds: West winds 20 to 30 mph gusting to 40 mph by early afternoon. * Locations impacted include: Butte, Georgetown Lake, Highway 12 Garrison to Elliston, Homestake Pass, MacDonald Pass, Highway 200 Bonner to Greenough, Highway 83 Seeley Lake to Condon, and I- 90 East Missoula to Bearmouth $$ MTZ002-212000- /O.NEW.KMSO.WI.Y.0003.180421T1800Z-180422T0300Z/ West Glacier Region- 153 PM MDT Fri Apr 20 2018 ...WIND ADVISORY IN EFFECT FROM NOON TO 9 PM MDT SATURDAY... The National Weather Service in Missoula has issued a Wind Advisory...which is in effect from noon to 9 PM MDT Saturday. * Impacts/Timing: Tree falls, power outages, hazardous driving conditions due to crosswinds Saturday afternoon and early evening. * Winds: West winds 20 to 30 mph gusting to 45 mph by early afternoon. * Locations impacted include: Bad Rock Canyon, Essex, Highway 83 Bigfork to Swan Lake, Marias Pass, and Polebridge $$
2 follow-up statements
040 WWUS75 KMSO 211931 NPWMSO URGENT - WEATHER MESSAGE National Weather Service Missoula MT 131 PM MDT Sat Apr 21 2018 MTZ003-220300- /O.CON.KMSO.WI.Y.0003.000000T0000Z-180422T0300Z/ Flathead/Mission Valleys- 131 PM MDT Sat Apr 21 2018 ...WIND ADVISORY REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING... * Impacts/Timing: Tree falls, power outages, hazardous driving conditions due to crosswinds, choppy wave activity on Flathead Lake this afternoon and early evening. * Winds: West winds 20 to 30 mph gusting to 45 mph. * Wave heights: 1 to 3 foot waves on Flathead Lake. * Locations impacted include: Flathead Lake, Flathead Valley, Mission Valley, and Polson $$ MTZ007-043-220300- /O.CON.KMSO.WI.Y.0003.000000T0000Z-180422T0300Z/ Butte/Blackfoot Region-Potomac/Seeley Lake Region- 131 PM MDT Sat Apr 21 2018 ...WIND ADVISORY REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING... * Impacts/Timing: Tree falls, power outages, hazardous driving conditions due to crosswinds along Highway 12 and Highway 200 corridors this afternoon and early evening. * Winds: West winds 20 to 30 mph gusting to 40 mph. * Locations impacted include: Butte, Georgetown Lake, Highway 12 Garrison to Elliston, Homestake Pass, MacDonald Pass, Highway 200 Bonner to Greenough, Highway 83 Seeley Lake to Condon, and I- 90 East Missoula to Bearmouth $$ MTZ002-220300- /O.CON.KMSO.WI.Y.0003.000000T0000Z-180422T0300Z/ West Glacier Region- 131 PM MDT Sat Apr 21 2018 ...WIND ADVISORY REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING... * Impacts/Timing: Tree falls, power outages, hazardous driving conditions due to crosswinds this afternoon and early evening. * Winds: West winds 20 to 30 mph gusting to 45 mph. * Locations impacted include: Bad Rock Canyon, Essex, Highway 83 Bigfork to Swan Lake, Marias Pass, and Polebridge $$
300 WWUS75 KMSO 220231 NPWMSO URGENT - WEATHER MESSAGE National Weather Service Missoula MT 831 PM MDT Sat Apr 21 2018 MTZ003-220345- /O.EXP.KMSO.WI.Y.0003.000000T0000Z-180422T0300Z/ Flathead/Mission Valleys- 831 PM MDT Sat Apr 21 2018 ...WIND ADVISORY WILL EXPIRE AT 9 PM MDT THIS EVENING... $$ MTZ007-043-220345- /O.EXP.KMSO.WI.Y.0003.000000T0000Z-180422T0300Z/ Butte/Blackfoot Region-Potomac/Seeley Lake Region- 831 PM MDT Sat Apr 21 2018 ...WIND ADVISORY WILL EXPIRE AT 9 PM MDT THIS EVENING... $$ MTZ002-220345- /O.EXP.KMSO.WI.Y.0003.000000T0000Z-180422T0300Z/ West Glacier Region- 831 PM MDT Sat Apr 21 2018 ...WIND ADVISORY WILL EXPIRE AT 9 PM MDT THIS EVENING... $$
Nearby
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.