Alert archive / Idaho / Special Weather Statements in 2012

Special Weather Statement, NWS Missoula, MT

April 24, 2012Clearwater County, Idaho

NWS Missoula, MT issued this special weather statement at Apr 24, 2012, 5:31 PM PDT for Clearwater County, Idaho. It was in force for 44 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, 5:31 PM PDT (00:31 UTC)
Expired: Apr 24, 2012, 6:15 PM PDT
In force: 44 min
Issued by: NWS Missoula, MT

County Clearwater County, ID

The radar

The Missoula radar (KMSX), 84 km from the middle of the area, began a volume at 00:34 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 text

As transmitted, in the capitals the NWS used until 2016.

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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, 3 hours 38 minutes earlier.

Area forecast discussion, Apr 24, 1:53 PM PDT, 3 hours 38 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, 1 hour 43 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, 1 hour 4 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 11448

Local storm report, Apr 24, 5:05 PM PDT, 26 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MISSOULA MT
605 PM MDT TUE APR 24 2012

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0600 PM     HAIL             2 N PIERCE              46.52N 115.80W
04/24/2012  E1.25 INCH       CLEARWATER         ID   TRAINED SPOTTER

            TRAINED WEATHER SPOTTER REPORTED 1 1/4 INCH HAIL ALONG
            WITH SOME WIND DAMAGE

&&

LBR

Special weather statement, Apr 24, 5:31 PM PDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MISSOULA MT
631 PM MDT TUE APR 24 2012

IDZ005-250115-
NORTHERN CLEARWATER MOUNTAINS-
531 PM PDT TUE APR 24 2012

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN CLEARWATER COUNTY
UNTIL 615 PM PDT...

AT 526 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM 17 MILES NORTHEAST OF HEADQUARTERS...OR 40 MILES
NORTHEAST OF OROFINO...MOVING NORTHEAST AT 40 MPH.

HAIL UP TO THE SIZE OF NICKELS AND WIND GUSTS UP TO 50 MPH ARE
EXPECTED WITH THIS STORM...ALONG WITH HEAVY RAIN.

LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...MAINLY RURAL AREAS
OF NORTHEASTERN CLEARWATER COUNTY.

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 4695 11512 4694 11498 4693 11494 4691 11492
      4686 11495 4680 11489 4681 11487 4678 11483
      4675 11491 4663 11552 4679 11561
TIME...MOT...LOC 0031Z 244DEG 35KT 4675 11543

The office that day

Everything else NWS Missoula, MT issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 25, 12:03 PM PDT	Areal Flood Warning	MSO	Sanders	45 hr
Apr 25, 12:21 PM PDT	Areal Flood Warning	MSO	Sanders	39 min
Apr 24, 7:03 PM PDT	Severe Thunderstorm Warning	MSO	Idaho	37 min
Apr 24, 7:46 PM PDT	Severe Thunderstorm Warning	MSO	Clearwater	54 min

Nearby

Special Weather Statements in Idaho, 2012 Every 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; radar from the NEXRAD Level II archive.