Alert archive / Idaho / Snow Advisories in 2008
Snow Advisory 21, NWS Missoula, MT
NWS Missoula, MT issued this snow advisory at Feb 24, 2008, 1:13 PM PST for Clearwater County, Idaho County, Idaho. It took effect at Feb 25, 2008, 12:00 AM PST. It was in force for .
The area
The counties it named.
The facts
- Issued
- Feb 24, 2008, 1:13 PM PST (21:13 UTC)
- In effect from
- Feb 25, 2008, 12:00 AM PST
- Expired
- Feb 24, 2008, 3:44 PM PST
- In force
- Issued by
- NWS Missoula, MT
Counties Clearwater County, ID, Idaho County, ID
The radar
The Missoula radar (KMSX), 148 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
Spokane, WA (KOTX), launched 12:00Z, 9.2 hours before the alert went out and 172 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
- 1010 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 173 m²/s²
- 0-3 km storm-relative helicity
- 214 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WWUS45 KMSO 242113 WSWMSO URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE MISSOULA MT 213 PM MST SUN FEB 24 2008 IDZ007-250515- /O.NEW.KMSO.SN.Y.0021.080225T0800Z-080225T1800Z/ OROFINO/GRANGEVILLE REGION- 113 PM PST SUN FEB 24 2008 ...SNOW ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO 10 AM PST MONDAY ABOVE 3000 FEET FOR THE WHITEBIRD GRADE AND THE FOOTHILLS OF OROFINO... THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A SNOW ADVISORY ABOVE 3000 FEET FOR THE WHITEBIRD GRADE AND THE FOOTHILLS OF OROFINO...WHICH IS IN EFFECT FROM MIDNIGHT TONIGHT TO 10 AM PST MONDAY. 2 TO 5 INCHES OF SNOW ARE EXPECTED ABOVE 3500 FEET MAINLY...ALONG THE WHITEBIRD GRADE AND THE FOOTHILLS OF OROFINO. TERRAIN 3000 TO 3500 FEET WILL SEE A MIX OF RAIN AND SNOW WITH POSSIBLE SNOW ACCUMULATIONS UP TO 2 INCHES. A SNOW ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. $$
1 follow-up statement
000 WWUS45 KMSO 242344 WSWMSO URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE MISSOULA MT 444 PM MST SUN FEB 24 2008 .A STRONG...COMPACT AND FAST MOVING WINTER WEATHER SYSTEM WILL MOVE SOUTHEAST ACROSS NORTH CENTRAL IDAHO AND WESTERN MONTANA EARLY MONDAY MORNING THROUGH MONDAY AFTERNOON. MODERATE TO HEAVY SNOWFALL AMOUNTS ARE EXPECTED IN THE HIGHER TERRAIN. THE SNOW IS EXPECTED TO BE OF THE HEAVY AND WET VARIETY...THEREFORE THERE ARE SOME CONCERNS FOR AVALANCHE POTENTIAL. IDZ007-250045- /O.CAN.KMSO.SN.Y.0021.080225T0800Z-080225T1800Z/ OROFINO/GRANGEVILLE REGION- 344 PM PST SUN FEB 24 2008 ...SNOW ADVISORY IS CANCELLED... THE NATIONAL WEATHER SERVICE IN MISSOULA HAS CANCELLED THE SNOW ADVISORY. THE WINTER WEATHER SYSTEM RESPONSIBLE FOR THE SNOW ADVISORY ISSUANCE IS NOW EXPECTED TO TAKE A MORE EASTERLY TRACK...THUS BEING MORE OF AN IMPACT TO THE MOUNTAINS. $$ IDZ006-MTZ006-250500- /O.NEW.KMSO.SN.Y.0022.080225T1200Z-080226T0000Z/ SOUTHERN CLEARWATER MOUNTAINS-BITTERROOT/SAPPHIRE MOUNTAINS- 444 PM MST SUN FEB 24 2008 /344 PM PST SUN FEB 24 2008/ ...SNOW ADVISORY IN EFFECT FROM 5 AM MST /4 AM PST/ TO 5 PM MST /4 PM PST/ MONDAY ABOVE 3500 FEET... THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A SNOW ADVISORY ABOVE 3500 FEET...WHICH IS IN EFFECT FROM 5 AM MST /4 AM PST/ TO 5 PM MST /4 PM PST/ MONDAY. 2 TO 6 INCHES OF NEW SNOWFALL ACCUMULATIONS ARE EXPECTED BETWEEN EARLY MONDAY MORNING AND MONDAY AFTERNOON. AREAS IMPACTED INCLUDE THE US HIGHWAY 12 CORRIDOR BETWEEN POWELL AND LOLO HOT SPRINGS...ELK CITY AND RED RIVER HOT SPRINGS. A SNOW ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. $$
The office that day
Everything else NWS Missoula, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 24, 3:44 PM PST | Snow Advisory | MSO | Idaho | 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.