Alert archive / Montana / Wind Advisories in 2011
Wind Advisory 21, NWS Missoula, MT
NWS Missoula, MT issued this wind advisory at Oct 29, 2011, 3:18 PM MDT for 6 counties in Montana. It was in force for 4 hr.
The area
The counties it named.
The facts
- Issued
- Oct 29, 2011, 3:18 PM MDT (21:18 UTC)
- Expired
- Oct 29, 2011, 6:50 PM MDT
- In force
- 4 hr
- Issued by
- NWS Missoula, MT
Counties Deer Lodge County, MT, Granite County, MT, Missoula County, MT, Powell County, MT, Ravalli County, MT, Silver Bow County, MT
The radar
The Missoula radar (KMSX), 87 km from the middle of the area, began a volume at 21:17 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, 9.3 hours before the alert went out and 241 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
- 1595 m above ground
- 0-6 km bulk shear
- 66 kt
- 0-1 km storm-relative helicity
- 422 m²/s²
- 0-3 km storm-relative helicity
- 650 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
657 WWUS75 KMSO 292118 NPWMSO URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE MISSOULA MT 318 PM MDT SAT OCT 29 2011 MTZ005-300300- /O.NEW.KMSO.WI.Y.0021.111029T2118Z-111030T0300Z/ MISSOULA/BITTERROOT VALLEYS- 318 PM MDT SAT OCT 29 2011 ...WIND ADVISORY IN EFFECT UNTIL 9 PM MDT THIS EVENING... THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A WIND ADVISORY...WHICH IS IN EFFECT UNTIL 9 PM MDT THIS EVENING. * IMPACTS/TIMING: STRONG GUSTY WINDS WILL START LATE THIS AFTERNOON THROUGH SATURDAY EVENING...ESPECIALLY IN THE BITTERROOT VALLEY FROM LOLO TO HAMILTON. * WINDS: WESTERLY WINDS OF 20 TO 25 MPH WITH GUSTS TO 40 MPH AT TIMES. * LOCATIONS IMPACTED INCLUDE...BITTERROOT VALLEY...MISSOULA PRECAUTIONARY/PREPAREDNESS ACTIONS... A WIND ADVISORY MEANS THAT WINDS OF 35 MPH ARE EXPECTED. WINDS THIS STRONG CAN MAKE DRIVING DIFFICULT...ESPECIALLY FOR HIGH PROFILE VEHICLES. USE EXTRA CAUTION. && $$ MTZ007-300300- /O.NEW.KMSO.WI.Y.0021.111029T2118Z-111030T0300Z/ BUTTE/BLACKFOOT REGION- 318 PM MDT SAT OCT 29 2011 ...WIND ADVISORY IN EFFECT UNTIL 9 PM MDT THIS EVENING... THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A WIND ADVISORY...WHICH IS IN EFFECT UNTIL 9 PM MDT THIS EVENING. * IMPACTS/TIMING: STRONG CROSS WINDS ON INTERSTATE 90 FROM GARRISON TO ANACONDA THIS AFTERNOON THROUGH 9 PM MDT THIS EVENING. * WINDS: WESTERLY WINDS OF 20 TO 25 MPH WILL GUST TO 40 MPH AT TIMES. * LOCATIONS IMPACTED INCLUDE...THE INTERSTATE 90 CORRIDOR FROM GARRISON TO ANACONDA AND MCDONALD PASS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WIND ADVISORY MEANS THAT WINDS OF 35 MPH ARE EXPECTED. WINDS THIS STRONG CAN MAKE DRIVING DIFFICULT...ESPECIALLY FOR HIGH PROFILE VEHICLES. USE EXTRA CAUTION. && $$
1 follow-up statement
833 WWUS75 KMSO 300050 NPWMSO URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE MISSOULA MT 650 PM MDT SAT OCT 29 2011 MTZ005-007-300200- /O.CAN.KMSO.WI.Y.0021.000000T0000Z-111030T0300Z/ MISSOULA/BITTERROOT VALLEYS-BUTTE/BLACKFOOT REGION- 650 PM MDT SAT OCT 29 2011 ...WIND ADVISORY IS CANCELLED... THE NATIONAL WEATHER SERVICE IN MISSOULA HAS CANCELLED THE WIND ADVISORY. $$
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.