Alert archive / Idaho / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 15, NWS Missoula, MT

June 4, 2012Clearwater County, Idaho County, Idaho

NWS Missoula, MT issued this severe thunderstorm warning at Jun 4, 2012, 7:47 PM PDT for Clearwater County, Idaho County, Idaho. It was in force for 43 min. 3 reports 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, 7:47 PM PDT (02:47 UTC)
Expired: Jun 4, 2012, 8:30 PM PDT
In force: 43 min
Issued by: NWS Missoula, MT
Area: Storm-based polygon

Counties Clearwater County, ID, Idaho County, ID

The radar

The Missoula radar (KMSX), 163 km from the middle of the area, began a volume at 02:48 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
Jun 4, 7:50 PM PDT	HAIL 1	1 Ene Woodland, ID
Jun 4, 7:55 PM PDT	HAIL 1.75	3 Sse Weippe, ID
Jun 4, 7:55 PM PDT	HAIL 1.75	W Weippe, ID

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, 2.8 hours before the alert went out and 133 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.

991 
WUUS55 KMSO 050247
SVRMSO
IDC035-049-050330-
/O.NEW.KMSO.SV.W.0015.120605T0247Z-120605T0330Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MISSOULA MT
747 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...
  CENTRAL CLEARWATER COUNTY IN NORTH CENTRAL IDAHO...

* UNTIL 830 PM PDT.

* AT 744 PM PDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM
  CAPABLE OF PRODUCING HAIL UP TO ONE INCH IN DIAMETER.  THIS STORM
  WAS LOCATED 6 MILES SOUTH OF WEIPPE...OR ABOUT NEAR KAMIAH...AND
  WAS MOVING NORTH AT 45 MPH.

* LOCATIONS IMPACTED INCLUDE...CARDIFF...ELK RIVER...HEADQUARTERS...
  JAYPE...PIERCE...WEIPPE AND WOODLAND.

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 4694 11621 4689 11542 4622 11587 4624 11604
      4625 11607 4629 11613
TIME...MOT...LOC 0247Z 190DEG 41KT 4633 11597

$$

DICKERSON

1 follow-up statement

597 
WWUS55 KMSO 050308
SVSMSO

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

IDC035-049-050330-
/O.CON.KMSO.SV.W.0015.000000T0000Z-120605T0330Z/
IDAHO ID-CLEARWATER ID-
808 PM PDT MON JUN 4 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 830 PM PDT
FOR CENTRAL CLEARWATER AND NORTHERN IDAHO COUNTIES...

* AT 803 PM PDT...TRAINED WEATHER SPOTTERS REPORTED A SEVERE
  THUNDERSTORM CAPABLE OF PRODUCING LARGE DAMAGING HAIL UP TO GOLF
  BALL SIZE.  THIS STORM WAS LOCATED 7 MILES SOUTHWEST OF JAYPE...OR
  ABOUT 14 MILES EAST OF OROFINO...AND WAS MOVING NORTH AT 40 MPH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

HAIL UP TO ONE HALF INCHES IN DIAMETER HAS BEEN REPORTED IN WEIPPE 
WITH THIS STORM. IF YOU ARE IN THE PATH OF THE STORM...TAKE 
IMMEDIATE ACTION TO PROTECT LIFE AND PROPERTY.

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

&&

LAT...LON 4694 11621 4689 11542 4622 11587 4624 11604
      4625 11607 4629 11613
TIME...MOT...LOC 0307Z 185DEG 36KT 4653 11596

$$

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, 8:29 PM PDT	Severe Thunderstorm Warning	MSO	Clearwater, Idaho	46 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.