Alert archive / Montana / Wind Advisories in 2011
Wind Advisory 20, NWS Missoula, MT
NWS Missoula, MT issued this wind advisory at Oct 28, 2011, 11:07 AM MDT for 6 counties in Montana. It took effect at Oct 29, 2011, 12:00 AM MDT. It was in force for 6 hr.
The area
The counties it named.
The facts
- Issued
- Oct 28, 2011, 11:07 AM MDT (17:07 UTC)
- In effect from
- Oct 29, 2011, 12:00 AM MDT
- Expired
- Oct 29, 2011, 5:53 AM MDT
- In force
- 6 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 17:03 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, 5.1 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
- 1580 m above ground
- 0-6 km bulk shear
- 59 kt
- 0-1 km storm-relative helicity
- 94 m²/s²
- 0-3 km storm-relative helicity
- 221 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
625 WWUS75 KMSO 281707 NPWMSO URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE MISSOULA MT 1107 AM MDT FRI OCT 28 2011 ...STRONG WINDS TONIGHT AND TOMORROW MORNING... .A COLD FRONT MOVING THROUGH THE NORTHERN ROCKIES TONIGHT WILL CAUSE STRONG WINDS NEAR MOUNTAIN TOPS IN THE BITTERROOT AND SAPPHIRE RANGES TO SURFACE IN THE BITTERROOT VALLEY AND NEAR DEER LODGE TOWARDS MORNING. MTZ007-291200- /O.NEW.KMSO.WI.Y.0020.111029T0600Z-111029T1500Z/ BUTTE/BLACKFOOT REGION- 1107 AM MDT FRI OCT 28 2011 ...WIND ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM MDT SATURDAY ALONG THE I-90 CORRIDOR FROM GARRISON TO ANACONDA... THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A WIND ADVISORY...WHICH IS IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM MDT SATURDAY. * IMPACTS/TIMING: STRONG CROSS WINDS ON INTERSTATE 90 FROM GARRISON TO ANACONDA TONIGHT AND TOMORROW MORNING. THE STRONGEST WINDS WILL BE AROUND 6 AM. * WINDS: WESTERLY WINDS OF 25 MPH WILL GUST TO 45 MPH AT TIMES. * LOCATIONS IMPACTED INCLUDE...THE INTERSTATE 90 CORRIDOR FROM GARRISON TO ANACONDA. 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. && $$ MTZ005-291200- /O.NEW.KMSO.WI.Y.0020.111029T0600Z-111029T1500Z/ MISSOULA/BITTERROOT VALLEYS- 1107 AM MDT FRI OCT 28 2011 ...WIND ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM MDT SATURDAY FOR THE BITTERROOT VALLEY... THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A WIND ADVISORY FOR THE BITTERROOT VALLEY...WHICH IS IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM MDT SATURDAY. * IMPACTS/TIMING: STRONG WINDS WILL START LATE TONIGHT AND CONTINUE THROUGH SATURDAY MORNING...ESPECIALLY ON THE WESTERN EDGE OF THE BITTERROOT VALLEY. THE STRONGEST WINDS ARE EXPECTED AROUND 6 AM. * WINDS: WESTERLY WINDS OF 25 MPH WILL GUST TO 45 MPH AT TIMES. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WIND ADVISORY MEANS THAT WINDS OF 35 MPH ARE EXPECTED. WINDS THIS STRONG CAN MAKE DRIVING DIFFICULT...ESPECIALLY FOR HIGH PROFILE VEHICLES. USE EXTRA CAUTION. && $$
1 follow-up statement
995 WWUS75 KMSO 291153 NPWMSO URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE MISSOULA MT 553 AM MDT SAT OCT 29 2011 MTZ005-007-291300- /O.CAN.KMSO.WI.Y.0020.000000T0000Z-111029T1500Z/ MISSOULA/BITTERROOT VALLEYS-BUTTE/BLACKFOOT REGION- 553 AM MDT SAT OCT 29 2011 ...WIND ADVISORY IS CANCELLED... THE NATIONAL WEATHER SERVICE IN MISSOULA HAS CANCELLED THE WIND ADVISORY. WIND SPEEDS HAVE STEADILY DECREASED OVERNIGHT AND ARE NO LONGER EXPECTED TO GUST ABOVE 40 MPH. HOWEVER BREEZY CONDITIONS WILL CONTINUE THROUGH THE DAY WITH FREQUENT GUSTS UP TO 30 MPH. $$
The office that day
Everything else NWS Missoula, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 28, 11:12 AM MDT | Winter Weather Advisory | MSO | Flathead, Lake | 22 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.