Alert archive / Idaho / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 16, NWS Missoula, MT

June 4, 2012Clearwater County, Idaho County, Idaho

NWS Missoula, MT issued this severe thunderstorm warning at Jun 4, 2012, 8:29 PM PDT for Clearwater County, Idaho County, Idaho. It was in force for 46 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jun 4, 2012, 8:29 PM PDT (03:29 UTC)
Expired: Jun 4, 2012, 9:15 PM PDT
In force: 46 min
Issued by: NWS Missoula, MT
Area: Storm-based polygon

Counties Clearwater County, ID, Idaho County, ID

The radar

The Missoula radar (KMSX), 168 km from the middle of the area, began a volume at 03:29 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.

What was reported inside it

Time	Report	Where	Remark
Jun 4, 8:55 PM PDT	TSTM WND DMG	Lowell, ID	THREE RIVERS RESORT. HIGH WINDS WITH MULTIPLE TREES DOWN. LOST INTERNET.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jun 4, 12:46 PM PDT	Severe Thunderstorm Watch	SPC	10 hr

The nearest sounding before it

Spokane, WA (KOTX), launched 00:00Z, 3.5 hours before the alert went out and 182 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1397 m above ground
0-6 km bulk shear: 55 kt
0-1 km storm-relative helicity: -34 m²/s²
0-3 km storm-relative helicity: 211 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.

813 
WUUS55 KMSO 050329
SVRMSO
IDC035-049-050415-
/O.NEW.KMSO.SV.W.0016.120605T0329Z-120605T0415Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MISSOULA MT
829 PM PDT MON JUN 4 2012

THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN IDAHO COUNTY IN CENTRAL IDAHO...
  SOUTHERN CLEARWATER COUNTY IN NORTH CENTRAL IDAHO...

* UNTIL 915 PM PDT.

* AT 825 PM PDT...DOPPLER RADAR INDICATED A LINE OF SEVERE
  THUNDERSTORMS CAPABLE OF PRODUCING GOLF BALL SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED
  ALONG A LINE EXTENDING FROM 35 MILES SOUTH OF LOWELL TO 23 MILES
  SOUTH OF LOWELL TO 11 MILES SOUTHEAST OF GRANGEVILLE...OR ALONG A
  LINE EXTENDING FROM 41 MILES SOUTHEAST OF GRANGEVILLE TO 28 MILES
  EAST OF GRANGEVILLE TO 11 MILES SOUTHEAST OF GRANGEVILLE...AND WERE
  MOVING NORTH AT 55 MPH.

* LOCATIONS IMPACTED INCLUDE...CLEARWATER...EAST KAMIAH...ELK CITY...
  FALL CREEK...GLENWOOD...GOLDEN...GRANGEVILLE...HARPSTER...JAYPE...
  KOOSKIA...LOWELL...MUSSELSHELL...NEWSOME...PIERCE...RED RIVER HOT
  SPRINGS...STITES...SYRINGA AND WEIPPE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

LARGE HAIL IS LIKELY WITH THIS SEVERE THUNDERSTORM. DAMAGING WINDS
ARE POSSIBLE...ALONG WITH FREQUENT LIGHTNING AND HEAVY RAIN. FOR YOUR
PROTECTION...GO INDOORS AND STAY AWAY FROM WINDOWS. IF YOU ARE CAUGHT
OUTSIDE...MOVE TO A WELL PROTECTED AREA.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL MIDNIGHT PDT
TUESDAY MORNING FOR NORTHEASTERN IDAHO AND NORTHWESTERN MONTANA.

&&

LAT...LON 4622 11606 4623 11603 4625 11605 4653 11598
      4655 11538 4627 11481 4556 11526 4575 11558
      4573 11617
TIME...MOT...LOC 0329Z 190DEG 48KT 4572 11533 4586 11556
          4584 11602

$$

DICKERSON

1 follow-up statement

302 
WWUS55 KMSO 050401
SVSMSO

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MISSOULA MT
1001 PM MDT MON JUN 4 2012

IDC035-049-050415-
/O.CON.KMSO.SV.W.0016.000000T0000Z-120605T0415Z/
IDAHO ID-CLEARWATER ID-
901 PM PDT MON JUN 4 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 915 PM PDT
FOR SOUTHERN CLEARWATER AND NORTHERN IDAHO COUNTIES...

* AT 857 PM PDT...DOPPLER RADAR CONTINUED TO INDICATE A LINE OF
  SEVERE THUNDERSTORMS CAPABLE OF PRODUCING GOLF BALL SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED
  ALONG A LINE EXTENDING FROM 21 MILES EAST OF LOWELL TO 6 MILES EAST
  OF LOWELL TO KOOSKIA...OR ALONG A LINE EXTENDING FROM 43 MILES EAST
  OF KAMIAH TO 27 MILES EAST OF KAMIAH TO 8 MILES SOUTHEAST OF
  KAMIAH...AND WERE MOVING NORTH AT 55 MPH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD
TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL MIDNIGHT PDT
TUESDAY MORNING FOR NORTHEASTERN IDAHO AND NORTHWESTERN MONTANA.

&&

LAT...LON 4588 11529 4600 11553 4596 11600 4645 11598
      4648 11538 4637 11501 4633 11493
TIME...MOT...LOC 0401Z 190DEG 48KT 4612 11515 4620 11545
          4618 11592

$$

DICKERSON

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 4, 6:30 PM PDT	Special Weather Statement	MSO	Clearwater	45 min
Jun 4, 6:33 PM PDT	Special Weather Statement	MSO	Lewis	42 min
Jun 4, 6:55 PM PDT	Severe Thunderstorm Warning	MSO	Idaho	50 min
Jun 4, 7:40 PM PDT	Severe Thunderstorm Warning	MSO	Idaho	50 min
Jun 4, 7:47 PM PDT	Severe Thunderstorm Warning	MSO	Clearwater, Idaho	43 min
Jun 4, 9:17 PM PDT	Severe Thunderstorm Warning	MSO	Clearwater, Idaho	43 min

Nearby

Severe Thunderstorm Warnings in Idaho, 2012 Every severe thunderstorm warning 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.