Alert archive / Montana / Wind Advisories in 2016
Wind Advisory 12, NWS Missoula, MT
NWS Missoula, MT issued this wind advisory at Dec 20, 2016, 10:11 AM MST for Missoula County, Ravalli County, Montana. It took effect at Dec 20, 2016, 2:00 PM MST. It was in force for 4 hr.
The area
The counties it named.
The facts
- Issued
- Dec 20, 2016, 10:11 AM MST (17:11 UTC)
- In effect from
- Dec 20, 2016, 2:00 PM MST
- Expired
- Dec 20, 2016, 6:00 PM MST
- In force
- 4 hr
- Issued by
- NWS Missoula, MT
Counties Missoula County, MT, Ravalli County, MT
The radar
The Missoula radar (KMSX), 54 km from the middle of the area, began a volume at 17:12 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, 5.2 hours before the alert went out and 220 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
- 550 m above ground
- 0-6 km bulk shear
- 109 kt
- 0-1 km storm-relative helicity
- 295 m²/s²
- 0-3 km storm-relative helicity
- 530 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
316 WWUS75 KMSO 201711 NPWMSO URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE MISSOULA MT 1011 AM MST TUE DEC 20 2016 MTZ007-210100- /O.EXT.KMSO.HW.W.0004.000000T0000Z-161221T0100Z/ BUTTE/BLACKFOOT REGION- 1011 AM MST TUE DEC 20 2016 ...HIGH WIND WARNING NOW IN EFFECT UNTIL 6 PM MST THIS EVENING FOR I-90 FROM ANACONDA TO GARRISON JUNCTION... THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A HIGH WIND WARNING...WHICH IS IN EFFECT UNTIL 5 PM MST THIS AFTERNOON. * IMPACTS/TIMING: STRONG WINDS WILL OCCUR THIS AFTERNOON...WITH CROSS WINDS DEVELOPING ON INTERSTATE 90...CAUSING DIFFICULT DRIVING CONDITIONS FOR HIGH PROFILE VEHICLES FROM GARRISON JUNCTION TO ANACONDA. * WINDS: SOUTHWEST WINDS SHIFTING TO WEST THIS AFTERNOON AND 40 MPH WITH GUSTS TO 60 MPH. $$ MTZ005-210100- /O.NEW.KMSO.WI.Y.0012.161220T2100Z-161221T0100Z/ MISSOULA/BITTERROOT VALLEYS- 1011 AM MST TUE DEC 20 2016 ...WIND ADVISORY IN EFFECT FROM 2 PM THIS AFTERNOON TO 6 PM MST THIS EVENING FOR BITTERROOT VALLEY AND MISSOULA... THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A WIND ADVISORY...WHICH IS IN EFFECT FROM 2 PM THIS AFTERNOON TO 6 PM MST THIS EVENING. * IMPACTS/TIMING: GUSTY WEST WINDS WILL DEVELOP MID-AFTERNOON FOR THE MISSOULA AND BITTERROOT VALLEYS. * WINDS: WEST 20 TO 35 MPH WITH HIGHER GUSTS. $$
1 follow-up statement
758 WWUS75 KMSO 210052 NPWMSO URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE MISSOULA MT 552 PM MST TUE DEC 20 2016 MTZ007-210200- /O.EXP.KMSO.HW.W.0004.000000T0000Z-161221T0100Z/ BUTTE/BLACKFOOT REGION- 552 PM MST TUE DEC 20 2016 ...HIGH WIND WARNING WILL EXPIRE AT 6 PM MST THIS EVENING FOR I-90 FROM ANACONDA TO GARRISON JUNCTION... WHILE GUSTY WINDS WILL CONTINUE FOR THE NEXT FEW HOURS, WINDS WILL DECREASE THROUGH THE EVENING. $$ MTZ005-210200- /O.EXP.KMSO.WI.Y.0012.000000T0000Z-161221T0100Z/ MISSOULA/BITTERROOT VALLEYS- 552 PM MST TUE DEC 20 2016 ...WIND ADVISORY WILL EXPIRE AT 6 PM MST THIS EVENING FOR BITTERROOT VALLEY AND MISSOULA... WINDS WILL CONTINUE TO DECREASE THROUGH THE EVENING. $$
The office that day
Everything else NWS Missoula, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 20, 2:45 AM MST | High Wind Warning | MSO | Deer Lodge, Granite, Powell, Silver Bow | 15 hr |
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.