Alert archive / Idaho / Special Weather Statements in 2022

Special Weather Statement, NWS Missoula, MT

August 12, 2022Idaho County, Idaho

NWS Missoula, MT issued this special weather statement at Aug 12, 2022, 12:25 PM PDT for Idaho County, Idaho. It was in force for 35 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
Aug 12, 2022, 12:25 PM PDT (19:25 UTC)
Expired
Aug 12, 2022, 1:00 PM PDT
In force
35 min
Issued by
NWS Missoula, MT
Hail
0.75 in
Wind
40

County Idaho County, ID

The radar

The Missoula radar (KMSX), 171 km from the middle of the area, began a volume at 19:27 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, 7.4 hours before the alert went out and 224 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.

Skew-T log-pSkew-T log-p diagram, Spokane, WA at 12:00Z on 2022-08-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 504 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Spokane, WA at 12:00Z on 2022-08-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -12 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
504 J/kg
Mixed-layer CIN
-335 J/kg
Mixed-layer LCL
1847 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
-12 m²/s²
0-3 km storm-relative helicity
92 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

Open this sounding in Storm Lab

The text

As transmitted.

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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 Aug 12, 2:33 AM PDT, 9 hours 52 minutes earlier.

Area forecast discussion, Aug 12, 2:33 AM PDT, 9 hours 52 minutes before
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In the hours before

Local storm report, Aug 12, 7:27 AM PDT, 4 hours 58 minutes before
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Local storm report, Aug 12, 9:10 AM PDT, 3 hours 15 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MISSOULA MT
1010 AM MDT FRI AUG 12 2022

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

0600 PM     TSTM WND DMG     WINONA                  46.13N 116.11W
08/11/2022                   IDAHO              ID   TRAINED SPOTTER

            GUSTY WINDS WITH THUNDERSTORMS BROUGHT DOWN
            TREES IN THE AREA. ESTIMATED PEA SIZE HAIL.

&&

KS
Special weather statement, Aug 12, 12:01 PM PDT, 24 minutes before
Special Weather Statement
National Weather Service Missoula MT
1201 PM PDT Fri Aug 12 2022

IDZ006-008-121945-
Southern Clearwater Mountains ID-
Lower Hells Canyon/Salmon River Region ID-
1201 PM PDT Fri Aug 12 2022

...Strong thunderstorms will impact portions of southwestern Idaho
County through 1245 PM PDT...

At 1200 PM PDT, Doppler radar was tracking strong thunderstorms along
a line extending from 7 miles west of Imnaha to 24 miles northwest of
New Meadows. Movement was northeast at 35 mph.

HAZARD...Visibility one-half mile or less and winds in excess of 30
         mph.

SOURCE...Radar indicated.

IMPACT...Low visibility could result in dangerous driving
         conditions. Gusty winds could knock down tree limbs and
         blow around unsecured objects. Boaters on the Snake River
         and Salmon River should seek shelter now.

Locations impacted include...
Riggins, Pollock, Riggins Hot Spring and Lucile.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with these storms and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

Frequent cloud to ground lightning is occurring with these storms.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

These storms may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

LAT...LON 4534 11667 4547 11656 4551 11656 4560 11646
      4569 11654 4575 11654 4578 11660 4578 11666
      4581 11669 4595 11661 4539 11603 4521 11631
      4527 11634 4527 11668
TIME...MOT...LOC 1900Z 219DEG 32KT 4555 11699 4512 11673

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...30 MPH
Special weather statement, Aug 12, 12:25 PM PDT, 0 minutes before
Special Weather Statement
National Weather Service Missoula MT
1225 PM PDT Fri Aug 12 2022

IDZ006-122000-
Southern Clearwater Mountains ID-
1225 PM PDT Fri Aug 12 2022

...A strong thunderstorm will impact portions of central Idaho County
through 100 PM PDT...

At 1225 PM PDT, Doppler radar was tracking a strong thunderstorm 25
miles south of Lowell, or 35 miles east of Grangeville, moving
northeast at 35 mph.

HAZARD...Winds in excess of 40 mph and penny size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
Elk City and Red River Hot Spring.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

LAT...LON 4568 11537 4580 11557 4607 11549 4587 11486
TIME...MOT...LOC 1925Z 219DEG 32KT 4580 11541

MAX HAIL SIZE...0.75 IN
MAX WIND GUST...40 MPH

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 11, 5:14 PM PDTSpecial Weather StatementMSO31 min
Aug 11, 6:19 PM PDTSpecial Weather StatementMSOSanders26 min
Aug 11, 6:39 PM PDTSpecial Weather StatementMSOMissoula51 min
Aug 11, 7:15 PM PDTSpecial Weather StatementMSOSanders30 min
Aug 11, 7:45 PM PDTSpecial Weather StatementMSOFlathead30 min
Aug 12, 12:01 PM PDTSpecial Weather StatementMSO44 min
Aug 12, 1:31 PM PDTSpecial Weather StatementMSOMineral29 min
Aug 12, 1:40 PM PDTSevere Thunderstorm WarningMSOMineral, Sanders35 min
Aug 12, 1:45 PM PDTSpecial Weather StatementMSOSanders45 min
Aug 12, 1:55 PM PDTSpecial Weather StatementMSOMineral35 min
Aug 12, 2:04 PM PDTSpecial Weather StatementMSORavalli26 min
Aug 12, 2:08 PM PDTSpecial Weather StatementMSOMineral37 min
Aug 12, 2:12 PM PDTSpecial Weather StatementMSOLincoln33 min
Aug 12, 2:16 PM PDTSevere Thunderstorm WarningMSOFlathead, Lincoln, Sanders29 min
Aug 12, 2:18 PM PDTSpecial Weather StatementMSOMissoula42 min
Aug 12, 2:26 PM PDTSevere Thunderstorm WarningMSOMineral, Sanders34 min
Aug 12, 2:31 PM PDTSevere Thunderstorm WarningMSOMineral, Missoula, Sanders29 min
Aug 12, 2:48 PM PDTSpecial Weather StatementMSOLincoln42 min
Aug 12, 2:51 PM PDTSpecial Weather StatementMSOMineral39 min
Aug 12, 3:11 PM PDTSpecial Weather StatementMSOMissoula49 min
Aug 12, 3:22 PM PDTSevere Thunderstorm WarningMSODeer Lodge, Granite53 min
Aug 12, 3:52 PM PDTSpecial Weather StatementMSOLake53 min
Aug 12, 3:55 PM PDTSpecial Weather StatementMSOFlathead50 min
Aug 12, 4:00 PM PDTSpecial Weather StatementMSOMissoula30 min
Aug 11, 5:05 PM PDTSpecial Weather StatementMSOClearwater25 min
Aug 11, 5:21 PM PDTSpecial Weather StatementMSOLewis24 min
Aug 11, 8:00 PM PDTSpecial Weather StatementMSOClearwater60 min
Aug 12, 1:08 PM PDTSevere Thunderstorm WarningMSOClearwater, Idaho37 min
Aug 12, 1:52 PM PDTSpecial Weather StatementMSOClearwater38 min
Aug 12, 1:54 PM PDTSevere Thunderstorm WarningMSOIdaho28 min
Aug 12, 2:08 PM PDTSevere Thunderstorm WarningMSOIdaho42 min
Aug 12, 2:21 PM PDTSpecial Weather StatementMSOLemhi39 min
Aug 12, 2:22 PM PDTSevere Thunderstorm WarningMSOClearwater, Idaho38 min
Aug 12, 2:41 PM PDTAreal Flood AdvisoryMSOIdaho4 hr
Aug 12, 2:45 PM PDTSevere Thunderstorm Warning Considerable damage threatMSOIdaho30 min
Aug 12, 3:07 PM PDTSevere Thunderstorm Warning Considerable damage threatMSOIdaho17 min
Aug 12, 4:22 PM PDTSpecial Weather StatementMSOLemhi38 min
Aug 12, 4:31 PM PDTSpecial Weather StatementMSOClearwater29 min
Aug 12, 4:55 PM PDTSpecial Weather StatementMSOIdaho35 min

Nearby

Special Weather Statements in Idaho, 2022Every special weather statement in 2022

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.