Alert archive / Idaho / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 13, NWS Missoula, MT

August 10, 2015Clearwater County, Idaho County, Idaho

NWS Missoula, MT issued this severe thunderstorm warning at Aug 10, 2015, 5:34 PM PDT for Clearwater County, Idaho County, Idaho. It was in force for 26 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 10, 2015, 5:34 PM PDT (00:34 UTC)
Expired: Aug 10, 2015, 6:00 PM PDT
In force: 26 min
Issued by: NWS Missoula, MT
Area: Storm-based polygon

Counties Clearwater County, ID, Idaho County, ID

The radar

The Missoula radar (KMSX), 156 km from the middle of the area, began a volume at 00:35 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, 0.6 hours before the alert went out and 173 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 650 J/kg
Mixed-layer CIN: -65 J/kg
Mixed-layer LCL: 2888 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: -14 m²/s²
0-3 km storm-relative helicity: 35 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.0

Open this sounding in Storm Lab

The text

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

976 
WUUS55 KMSO 110034
SVRMSO
IDC035-049-110100-
/O.NEW.KMSO.SV.W.0013.150811T0034Z-150811T0100Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MISSOULA MT
534 PM PDT MON AUG 10 2015

THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTH CENTRAL IDAHO COUNTY IN CENTRAL IDAHO...
  SOUTH CENTRAL CLEARWATER COUNTY IN THE PANHANDLE OF IDAHO...

* UNTIL 600 PM PDT

* AT 533 PM PDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM
  CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM
  WAS LOCATED 8 MILES NORTHWEST OF LOWELL...OR 16 MILES EAST OF
  KAMIAH...AND MOVING NORTH AT 40 MPH. NICKEL SIZE HAIL MAY ALSO
  ACCOMPANY THE DAMAGING WINDS.

* LOCATIONS IMPACTED INCLUDE...
  LOWELL...SYRINGA AND MUSSELSHELL. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS...DESTRUCTIVE HAIL...
DEADLY LIGHTNING AND VERY HEAVY RAIN. FOR YOUR PROTECTION...MOVE TO
AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY
RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS WHERE WATER
COVERS THE ROAD.

&&

LAT...LON 4609 11561 4609 11579 4646 11588 4641 11535
TIME...MOT...LOC 0033Z 187DEG 33KT 4625 11569 

$$

1 follow-up statement

505 
WWUS55 KMSO 110053
SVSMSO

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MISSOULA MT
553 PM PDT MON AUG 10 2015

IDC035-049-110103-
/O.EXP.KMSO.SV.W.0013.000000T0000Z-150811T0100Z/
IDAHO ID-CLEARWATER ID-
553 PM PDT MON AUG 10 2015

...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL IDAHO AND SOUTH
CENTRAL CLEARWATER COUNTIES WILL EXPIRE AT 600 PM PDT...
                
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY.
THEREFORE THE WARNING WILL BE ALLOWED TO EXPIRE.

LAT...LON 4609 11561 4609 11579 4646 11588 4641 11535
TIME...MOT...LOC 0048Z 187DEG 33KT 4625 11569 

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 10, 5:06 PM PDT	Special Weather Statement	MSO	Lewis	39 min
Aug 10, 5:10 PM PDT	Special Weather Statement	MSO	Idaho	50 min
Aug 10, 5:46 PM PDT	Special Weather Statement	MSO	Lewis	29 min
Aug 10, 6:52 PM PDT	Special Weather Statement	MSO	Clearwater	38 min
Aug 11, 10:26 AM PDT	Red Flag Warning	MSO	Clearwater, Idaho	11 hr
Aug 11, 4:01 PM PDT	Special Weather Statement	MSO	Clearwater	29 min
Aug 11, 4:59 PM PDT	Special Weather Statement	MSO	Clearwater	46 min

Nearby

Severe Thunderstorm Warnings in Idaho, 2015 Every severe thunderstorm warning in 2015

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.