Alert archive / Idaho / Special Weather Statements in 2021
Special Weather Statement, NWS Missoula, MT
NWS Missoula, MT issued this special weather statement at Aug 5, 2021, 8:24 PM PDT for Clearwater County, Idaho. It was in force for 36 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 5, 2021, 8:24 PM PDT (03:24 UTC)
- Expired
- Aug 5, 2021, 9:00 PM PDT
- In force
- 36 min
- Issued by
- NWS Missoula, MT
- Hail
- 0.00 in
- Wind
- 40
County Clearwater County, ID
The radar
The Spokane radar (KOTX), 164 km from the middle of the area, began a volume at 03:27 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 00:00Z, 3.4 hours before the alert went out and 125 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
- 2910 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- -14 m²/s²
- 0-3 km storm-relative helicity
- 15 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
482
WWUS85 KMSO 060324
SPSMSO
Special Weather Statement
National Weather Service Missoula MT
824 PM PDT Thu Aug 5 2021
IDZ005-007-060400-
Northern Clearwater Mountains ID-Orofino/Grangeville Region ID-
824 PM PDT Thu Aug 5 2021
...Strong thunderstorms will impact portions of north central Idaho
and western Clearwater Counties through 900 PM PDT...
At 823 PM PDT, Doppler radar was tracking strong thunderstorms along
a line extending from 10 miles northwest of Orofino to 7 miles south
of Elk River to near Headquarters to near Pierce. Movement was
northeast at 35 mph. These storms have had a history of producing
gusty outflow winds of 40-50 mph.
HAZARD...Winds in excess of 40 mph.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
Locations impacted include...
Orofino, Weippe, Elk River, Headquarters, Cardiff, Ahsahka, Jaype,
Dent, Teakean, Woodland and Riverside.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
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 4663 11645 4664 11633 4693 11633 4693 11551
4688 11548 4625 11605 4626 11607 4642 11615
4648 11637 4650 11638 4650 11645
TIME...MOT...LOC 0323Z 211DEG 31KT 4660 11642 4667 11618 4660 11591
4648 11585
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH
$$The office that day
Everything else NWS Missoula, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 5, 5:21 PM PDT | Special Weather Statement | MSO | Powell | 39 min |
| Aug 5, 7:08 PM PDT | Special Weather Statement | MSO | 52 min | |
| Aug 5, 8:12 PM PDT | Special Weather Statement | MSO | 48 min | |
| Aug 6, 12:13 AM PDT | Special Weather Statement | MSO | Ravalli | 47 min |
| Aug 6, 1:46 PM PDT | Fire Weather Watch | MSO | Beaverhead, Deer Lodge, Granite, Jefferson, Madison, Powell and 1 more | 22 hr |
| Aug 5, 8:20 PM PDT | Special Weather Statement | MSO | Idaho | 40 min |
| Aug 5, 8:38 PM PDT | Special Weather Statement | MSO | Idaho | 52 min |
| Aug 6, 4:32 PM PDT | Special Weather Statement | MSO | Lemhi | 43 min |
Nearby
Special Weather Statements in Idaho, 2021Every special weather statement in 2021
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.