Alert archive / Montana / Frost Advisories in 2011
Frost Advisory 2, NWS Missoula, MT
NWS Missoula, MT issued this frost advisory at Sep 3, 2011, 2:19 PM MDT for 4 counties in Montana. It took effect at Sep 4, 2011, 2:00 AM MDT. It was in force for 7 hr.
The area
The counties it named.
The facts
- Issued
- Sep 3, 2011, 2:19 PM MDT (20:19 UTC)
- In effect from
- Sep 4, 2011, 2:00 AM MDT
- Expired
- Sep 4, 2011, 9:00 AM MDT
- In force
- 7 hr
- Issued by
- NWS Missoula, MT
Counties Flathead County, MT, Lake County, MT, Lincoln County, MT, Sanders County, MT
The radar
The Missoula radar (KMSX), 122 km from the middle of the area, began a volume at 20:17 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
Spokane, WA (KOTX), launched 12:00Z, 8.3 hours before the alert went out and 135 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
- 2075 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- -4 m²/s²
- 0-3 km storm-relative helicity
- 47 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
063 WWUS75 KMSO 032019 NPWMSO URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE MISSOULA MT 219 PM MDT SAT SEP 3 2011 MTZ001-003-040430- /O.NEW.KMSO.FR.Y.0002.110904T0800Z-110904T1500Z/ KOOTENAI/CABINET REGION-FLATHEAD/MISSION VALLEYS- 219 PM MDT SAT SEP 3 2011 ...FROST ADVISORY IN EFFECT FROM 2 AM TO 9 AM MDT SUNDAY... THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A FROST ADVISORY...WHICH IS IN EFFECT FROM 2 AM TO 9 AM MDT SUNDAY. * IMPACTS/TIMING: CLEAR SKIES WITH CALM WINDS WILL ALLOW TEMPERATURES TO FALL BACK INTO THE 30S BY EARLY SUNDAY MORNING. THE GREATEST THREAT FOR FROST WILL BE IN THE LOW LYING AREAS. FROST SENSITIVE PLANTS MAY NEED TO BE PROTECTED OR MOVED INDOORS. * TEMPERATURES: IN THE LOWER 30S. * LOCATIONS IMPACTED INCLUDE...HIGHWAY 2 KALISPELL TO LIBBY... HIGHWAY 37 EUREKA TO LIBBY...HIGHWAY 56 BULL LAKE ROAD... HIGHWAY 93 EUREKA TO WHITEFISH...FLATHEAD VALLEY PRECAUTIONARY/PREPAREDNESS ACTIONS... A FROST ADVISORY MEANS THAT FROST IS POSSIBLE. SENSITIVE OUTDOOR PLANTS MAY BE KILLED IF LEFT UNCOVERED. && $$
2 follow-up statements
884 WWUS75 KMSO 040328 NPWMSO URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE MISSOULA MT 928 PM MDT SAT SEP 3 2011 MTZ001-003-041500- /O.CON.KMSO.FR.Y.0002.110904T0800Z-110904T1500Z/ KOOTENAI/CABINET REGION-FLATHEAD/MISSION VALLEYS- 928 PM MDT SAT SEP 3 2011 ...FROST ADVISORY REMAINS IN EFFECT FROM 2 AM TO 9 AM MDT SUNDAY... A FROST ADVISORY REMAINS IN EFFECT FROM 2 AM TO 9 AM MDT SUNDAY. * IMPACTS/TIMING: CLEAR SKIES WITH CALM WINDS WILL ALLOW TEMPERATURES TO FALL BACK INTO THE 30S BY EARLY SUNDAY MORNING. THE GREATEST THREAT FOR FROST WILL BE IN THE LOW LYING AREAS. FROST SENSITIVE PLANTS MAY NEED TO BE PROTECTED OR MOVED INDOORS. * TEMPERATURES: IN THE LOWER 30S. * LOCATIONS IMPACTED INCLUDE...HIGHWAY 2 KALISPELL TO LIBBY... HIGHWAY 37 EUREKA TO LIBBY...HIGHWAY 56 BULL LAKE ROAD... HIGHWAY 93 EUREKA TO WHITEFISH...FLATHEAD LAKE...FLATHEAD VALLEY... MISSION VALLEY...POLSON PRECAUTIONARY/PREPAREDNESS ACTIONS... A FROST ADVISORY MEANS THAT FROST IS POSSIBLE. SENSITIVE OUTDOOR PLANTS MAY BE KILLED IF LEFT UNCOVERED. && $$
543 WWUS75 KMSO 041447 NPWMSO URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE MISSOULA MT 847 AM MDT SUN SEP 4 2011 MTZ001-003-041600- /O.EXP.KMSO.FR.Y.0002.000000T0000Z-110904T1500Z/ KOOTENAI/CABINET REGION-FLATHEAD/MISSION VALLEYS- 847 AM MDT SUN SEP 4 2011 ...FROST ADVISORY WILL EXPIRE AT 9 AM MDT THIS MORNING... THE FROST ADVISORY WILL EXPIRE AT 9 AM MDT THIS MORNING. * LOCATIONS IMPACTED INCLUDE...HIGHWAY 2 KALISPELL TO LIBBY... HIGHWAY 37 EUREKA TO LIBBY...HIGHWAY 56 BULL LAKE ROAD... HIGHWAY 93 EUREKA TO WHITEFISH...FLATHEAD VALLEY $$
Nearby
Frost Advisories in Montana, 2011Every frost advisory in 2011
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.