Alert archive / Idaho / Special Weather Statements in 2012
Special Weather Statement, NWS Missoula, MT
NWS Missoula, MT issued this special weather statement at Apr 24, 2012, 4:27 PM PDT for Clearwater County, Idaho. It was in force for 48 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Apr 24, 2012, 4:27 PM PDT (23:27 UTC)
- Expired
- Apr 24, 2012, 5:15 PM PDT
- In force
- 48 min
- Issued by
- NWS Missoula, MT
County Clearwater County, ID
The radar
The Missoula radar (KMSX), 90 km from the middle of the area, began a volume at 23:27 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, 11.5 hours before the alert went out and 145 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
- 0 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- 52 m²/s²
- 0-3 km storm-relative helicity
- 92 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>What forecasters said that day
The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Missoula, MT wrote its last area forecast discussion before this special weather statement went out at Apr 24, 1:53 PM PDT, 2 hours 34 minutes earlier.
Area forecast discussion, Apr 24, 1:53 PM PDT, 2 hours 34 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE MISSOULA MT 253 PM MDT TUE APR 24 2012 ...MODERATE TO HEAVY RAINFALL AND COOLER TEMPERATURES EXPECTED THURSDAY INTO FRIDAY... ...RIVERS AND STREAMS EXPECTED TO RISE AND RUN HIGH THROUGH THE WEEK... .DISCUSSION...SCATTERED SHOWERS AND THUNDERSTORMS THIS AFTERNOON AND EVENING AND ONCE AGAIN WEDNESDAY AFTERNOON AND EVENING AS A COUPLE OF WEATHER DISTURBANCES MOVE THROUGH THE REGION. IMPACTS FROM STORMS WILL BE SMALL HAIL SOME BRIEF GUSTY WINDS AND BRIEF HEAVY RAIN. THE MAJOR WEATHER STORY THIS WEEK IS HEAVY RAIN LATE WEDNESDAY NIGHT AND THUR DAY...COOLER TEMPERATURES AND FLOODING ISSUES ACROSS THE NORTHERN ROCKIES. THE LONGWAVE TROF RESPONSIBLE FOR USHERING IN ADDED MOISTURE AND WEATHER DISTURBANCE WILL MOVE ONSHORE WEDNESDAY NIGHT AND THURSDAY. CONFIDENCE IS HIGH THIS SYSTEM WILL BRING RAIN...HEAVY AT TIMES. CONFIDENCE IS ALSO HIGH THE LOCATION FOR THE HEAVIEST RAIN WILL BE IN CENTRAL IDAHO AND NORTHWEST MONTANA WHERE AN INCH OF RAIN...LOCALLY MORE ARE EXPECTED MAJOR IMPACTS FROM THIS SYSTEM ARE: ...SMALL STREAM AND CREEK FLOODING. ...MAIN RIVER FLOODING AT THOMPSON FALLS...YAAK RIVER...FISHER RIVER NEAR LIBBY ...MUCH COLDER TEMPERATURES FRIDAY WITH HIGHS ONLY IN THE 40S. ...WINDY CONDITIONS DURING COLD FRONTAL PASSAGE THURSDAY NIGHT/FRIDAY. THIS SYSTEM WILL LEAVE THE REGION LATE FRIDAY. SCATTERED SHOWERS WILL OCCUR BEHIND THIS SYSTEM. EXPECT AN UNSETTLED AND COOLER WEEKEND COMPARED TO LAST WEEKEND'S RECORD WARM CONDITIONS. && .AVIATION...SCATTERED THUNDERSTORMS ARE EXPECTED THROUGH THE EVENING HOURS FOR ALL THE TERMINALS. SEVERAL WEAK WAVES WILL AFFECT BOTH KSMN AND KBTM LATER IN THE EVENING KEEPING THE CHANCE FOR ACTIVITY THROUGH AT LEAST 25/0600Z. THE MAIN THREATS WITH THE THUNDERSTORMS WILL BE SMALL HAIL...GUSTY WINDS...BRIEF HEAVY RAIN AND LIGHTNING. WIND GUSTS TO 40 KTS ARE POSSIBLE FROM KSMN TO KBTM ASSOCIATED WITH THE STORMS. GUSTY WINDS DUE TO THE WIND GRADIENT AND GOOD MIXING WILL DIMINISH BY 25/0300Z BUT THE THREAT FOR THUNDERSTORM GUSTS WILL BE POSSIBLE THROUGH 25/0600Z. THE THUNDERSTORM ACTIVITY SHOULD DIMINISH OVERNIGHT BUT THERE IS STILL A CHANCE FOR ISOLATED SHOWERS ESPECIALLY NEAR KMSO AND KSMN. EXPECT MORE THUNDERSTORM ACTIVITY TO DEVELOP BY 25/1800Z ON WEDNESDAY. && .MSO WATCHES/WARNINGS/ADVISORIES... MT...NONE. ID...NONE. && SHORT TERM...RPN LONG TERM....RPN AVIATION...NOBLE/KITSMILLER
In the hours before
Special weather statement, Apr 24, 3:48 PM PDT, 39 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MISSOULA MT 448 PM MDT TUE APR 24 2012 MTZ001-004-242330- KOOTENAI/CABINET REGION-LOWER CLARK FORK REGION- 448 PM MDT TUE APR 24 2012 ...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN SANDERS AND SOUTHERN LINCOLN COUNTIES UNTIL 530 PM MDT... AT 442 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 9 MILES SOUTHEAST OF MULLAN...OR 15 MILES EAST OF WALLACE. THE STORM IS MOVING EAST AT 30 MILE PER HOUR. HAIL UP TO ONE-HALF INCH IN DIAMETER IS EXPECTED WITH THIS STORM... ALONG WITH HEAVY RAIN. LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...LIBBY AND HERON. PRECAUTIONARY/PREPAREDNESS ACTIONS... IF THREATENING WEATHER APPROACHES YOUR AREA...GO INDOORS AND STAY AWAY FROM WINDOWS. IF YOU ARE CAUGHT OUTSIDE...MOVE TO A WELL PROTECTED AREA. && LAT...LON 4815 11533 4803 11606 4827 11607 4846 11561 TIME...MOT...LOC 2247Z 180DEG 0KT 4741 11561
Special weather statement, Apr 24, 4:27 PM PDT, 0 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MISSOULA MT
527 PM MDT TUE APR 24 2012
IDZ005-007-250015-
NORTHERN CLEARWATER MOUNTAINS-OROFINO/GRANGEVILLE REGION-
427 PM PDT TUE APR 24 2012
...SIGNIFICANT WEATHER ADVISORY FOR CLEARWATER COUNTY UNTIL 515 PM
PDT...
AT 420 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 9 MILES SOUTH OF
ALBERTON TO 16 MILES WEST OF WOODSIDE. THESE STORMS WERE MOVING
EAST NORTHEAST AT 30 MPH.
HAIL UP TO ONE-HALF INCH IN DIAMETER IS EXPECTED WITH THESE STORMS...
ALONG WITH HEAVY RAIN.
LOCATIONS NEAR THE PATH OF THESE STORMS
INCLUDE....PIERCE...HEADQUARTERS AND CARDIFF
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IF THREATENING WEATHER APPROACHES YOUR AREA...GO INDOORS AND STAY
AWAY FROM WINDOWS. IF YOU ARE CAUGHT OUTSIDE...MOVE TO A WELL
PROTECTED AREA.
&&
LAT...LON 4687 11585 4691 11499 4681 11490 4681 11487
4676 11477 4672 11479 4670 11476 4672 11471
4674 11470 4663 11462 4641 11622
TIME...MOT...LOC 2325Z 270DEG 0KT 4687 11448 4637 11448The office that day
Everything else NWS Missoula, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 24, 1:44 AM PDT | Areal Flood Warning | MSO | Lincoln | 4 days |
| Apr 24, 5:07 AM PDT | Areal Flood Warning | MSO | Lincoln | 4 days |
| Apr 24, 11:04 AM PDT | Areal Flood Warning | MSO | Mineral, Missoula, Ravalli | 24 hr |
| Apr 24, 11:05 AM PDT | Areal Flood Warning | MSO | Mineral, Missoula, Ravalli | 102 min |
| Apr 24, 12:58 PM PDT | Areal Flood Warning | MSO | Sanders | 23 hr |
| Apr 24, 1:05 PM PDT | Areal Flood Advisory | MSO | Missoula, Ravalli | 4 days |
| Apr 24, 3:48 PM PDT | Special Weather Statement | MSO | Lincoln | 42 min |
Nearby
Special Weather Statements in Idaho, 2012Every special weather statement in 2012
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.