Alert archive / Idaho / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 33, NWS Missoula, MT

June 30, 2012Clearwater County, Idaho County, Idaho

NWS Missoula, MT issued this severe thunderstorm warning at Jun 30, 2012, 8:07 PM PDT for Clearwater County, Idaho County, Idaho. It was in force for 39 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
Jun 30, 2012, 8:07 PM PDT (03:07 UTC)
Expired
Jun 30, 2012, 8:46 PM PDT
In force
39 min
Issued by
NWS Missoula, MT
Area
Storm-based polygon

Counties Clearwater County, ID, Idaho County, ID

The radar

The Spokane radar (KOTX), 186 km from the middle of the area, began a volume at 03:10 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, 3.1 hours before the alert went out and 154 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 00:00Z on 2012-07-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 101 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Spokane, WA at 00:00Z on 2012-07-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 18 square meters per square second.1939587897Sfc1 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
101 J/kg
Mixed-layer CIN
-45 J/kg
Mixed-layer LCL
1306 m above ground
0-6 km bulk shear
44 kt
0-1 km storm-relative helicity
18 m²/s²
0-3 km storm-relative helicity
159 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.

931 
WUUS55 KMSO 010307
SVRMSO
IDC035-049-010400-
/O.NEW.KMSO.SV.W.0033.120701T0307Z-120701T0400Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MISSOULA MT
807 PM PDT SAT JUN 30 2012

THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A

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

* UNTIL 900 PM PDT.

* AT 806 PM PDT...TRAINED WEATHER SPOTTERS REPORTED A SEVERE
  THUNDERSTORM CAPABLE OF PRODUCING HAIL UP TO ONE INCH IN DIAMETER. 
  THIS STORM WAS LOCATED 26 MILES SOUTHWEST OF OROFINO...OR ABOUT 14
  MILES SOUTHEAST OF LAPWAI...AND WAS MOVING NORTHEAST AT 45 MPH.

* LOCATIONS IMPACTED INCLUDE...AHSAHKA...CARDIFF...FERDINAND...
  GLENWOOD...GREER...JAYPE...MUSSELSHELL...OROFINO...PARDEE...
  PIERCE...RIVERSIDE...WEIPPE AND WOODLAND.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS AND HAIL...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.

&&

LAT...LON 4621 11644 4617 11630 4619 11619 4622 11614
      4623 11604 4630 11614 4640 11619 4640 11629
      4647 11639 4649 11639 4672 11597 4630 11544
      4614 11648
TIME...MOT...LOC 0307Z 243DEG 38KT 4623 11664

$$
2 follow-up statements
949 
WWUS55 KMSO 010332
SVSMSO

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MISSOULA MT
932 PM MDT SAT JUN 30 2012

IDC035-049-010400-
/O.CON.KMSO.SV.W.0033.000000T0000Z-120701T0400Z/
IDAHO ID-CLEARWATER ID-
832 PM PDT SAT JUN 30 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM PDT
FOR WESTERN CLEARWATER AND NORTHERN IDAHO COUNTIES...

* AT 830 PM PDT...DOPPLER RADAR CONTINUED TO INDICATE A STRONG
  THUNDERSTORM CAPABLE OF PRODUCING HAIL UP TO ONE INCH IN DIAMETER. 
  THIS STORM WAS LOCATED 10 MILES SOUTHWEST OF AHSAHKA...OR ABOUT 11
  MILES SOUTHWEST OF OROFINO...AND WAS MOVING NORTHEAST AT 35 MPH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY. LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.

&&

LAT...LON 4621 11644 4617 11630 4619 11619 4622 11614
      4623 11604 4630 11614 4640 11619 4640 11629
      4647 11639 4649 11639 4672 11597 4630 11544
      4614 11648
TIME...MOT...LOC 0331Z 233DEG 28KT 4637 11641

$$
758 
WWUS55 KMSO 010346
SVSMSO

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MISSOULA MT
946 PM MDT SAT JUN 30 2012

IDC035-049-010356-
/O.CAN.KMSO.SV.W.0033.000000T0000Z-120701T0400Z/
IDAHO ID-CLEARWATER ID-
846 PM PDT SAT JUN 30 2012

...THE SEVERE THUNDERSTORM WARNING FOR WESTERN CLEARWATER AND
NORTHERN IDAHO COUNTIES IS CANCELLED...

LAT...LON 4621 11644 4617 11630 4619 11619 4622 11614
      4623 11604 4630 11614 4640 11619 4640 11629
      4647 11639 4649 11639 4672 11597 4630 11544
      4614 11648
TIME...MOT...LOC 0346Z 243DEG 38KT 4641 11611

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 1, 2:31 PM PDTSevere Thunderstorm WarningMSOLemhi44 min
Jul 1, 4:01 PM PDTSpecial Weather StatementMSOLemhi44 min
Jul 1, 4:37 PM PDTAreal Flood AdvisoryMSOLemhi4 hr

Nearby

Severe Thunderstorm Warnings in Idaho, 2012Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.