Alert archive / Idaho / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 16, NWS Spokane, WA

July 2, 2012Benewah County, Kootenai County, Shoshone County, Idaho

NWS Spokane, WA issued this severe thunderstorm warning at Jul 2, 2012, 9:27 PM PDT for Benewah County, Kootenai County, Shoshone County, Idaho. It was in force for 48 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
Jul 2, 2012, 9:27 PM PDT (04:27 UTC)
Expired
Jul 2, 2012, 10:15 PM PDT
In force
48 min
Issued by
NWS Spokane, WA
Area
Storm-based polygon

Counties Benewah County, ID, Kootenai County, ID, Shoshone County, ID

The radar

The Spokane radar (KOTX), 81 km from the middle of the area, began a volume at 04:26 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

TimeReportWhereRemark
Jul 2, 9:35 PM PDTHAIL 12 Ene Chatcolet, IDMOSTLY PEA TO DIME SIZE...BUT A FEW NICKEL TO QUARTER SIZE HAIL STONES. HAIL LASTED 4 MINUTES.
Jul 2, 9:40 PM PDTHAIL 0.755 S Harrison, IDTIME ESTIMATED. SPOUSE OF BENEWAH DISPATCH OFFICER.
Jul 2, 10:05 PM PDTHAIL 0.55 W St. Maries, IDHAIL LASTED FOR FIVE MINUTES THROUGH 2210 PDT.

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

The nearest sounding before it

Spokane, WA (KOTX), launched 00:00Z, 4.5 hours before the alert went out and 29 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 2012-07-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 2012-07-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 52 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2279 m above ground
0-6 km bulk shear
57 kt
0-1 km storm-relative helicity
52 m²/s²
0-3 km storm-relative helicity
115 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.

922 
WUUS56 KOTX 030427
SVROTX
IDC009-055-079-030515-
/O.NEW.KOTX.SV.W.0016.120703T0427Z-120703T0515Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SPOKANE WA
927 PM PDT MON JUL 2 2012

THE NATIONAL WEATHER SERVICE IN SPOKANE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN BENEWAH COUNTY IN THE PANHANDLE OF IDAHO...
  THIS INCLUDES THE CITY OF ST. MARIES...
  SOUTHEASTERN KOOTENAI COUNTY IN THE PANHANDLE OF IDAHO...
  WEST CENTRAL SHOSHONE COUNTY IN THE PANHANDLE OF IDAHO...

* UNTIL 1015 PM PDT

* AT 926 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR
  PLUMMER...OR 11 MILES WEST OF ST. MARIES...AND MOVING NORTHEAST AT
  40 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  CHATCOLET...HARRISON...ST. MARIES...MEDIMONT...ROSE LAKE...FOURTH
  OF JULY PASS...CATALDO AND KINGSTON

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.

&&

LAT...LON 4772 11650 4746 11614 4717 11681 4730 11699
TIME...MOT...LOC 0427Z 227DEG 36KT 4730 11680

$$

VAN HORN
1 follow-up statement
837 
WWUS56 KOTX 030454
SVSOTX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SPOKANE WA
954 PM PDT MON JUL 2 2012

IDC009-055-079-030515-
/O.CON.KOTX.SV.W.0016.000000T0000Z-120703T0515Z/
SHOSHONE ID-BENEWAH ID-KOOTENAI ID-
954 PM PDT MON JUL 2 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1015 PM PDT
FOR SOUTHEASTERN KOOTENAI...NORTHERN BENEWAH AND WEST CENTRAL
SHOSHONE COUNTIES...

AT 948 PM PDT...TRAINED WEATHER SPOTTERS REPORTED A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THIS STORM WAS
LOCATED NEAR MEDIMONT...OR 9 MILES NORTH OF ST. MARIES...MOVING 
NORTHEAST AT 40 MPH. A SECOND STORM CAPABLE OF PRODUCING HAIL TO THE 
SIZE OF QUARTERS IS MOVING ALONG THE SAME PATH. THIS STORM WILL BE 
MOVING INTO CHATCOLET...ST MARIES...AND INTO MEDIMONT.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO ROSE
LAKE...FOURTH OF JULY PASS...CATALDO AND KINGSTON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

HAIL UP TO THE SIZE OF QUARTERS HAS BEEN REPORTED TWO MILES 
EAST-NORTHEAST FROM CHATCOLET WITH THIS STORM. IF YOU ARE IN THE 
PATH OF THE STORM...TAKE IMMEDIATE ACTION TO PROTECT LIFE AND 
PROPERTY.

&&

LAT...LON 4772 11650 4746 11614 4717 11681 4730 11699
TIME...MOT...LOC 0451Z 227DEG 36KT 4746 11654

$$

VAN HORN

The office that day

Everything else NWS Spokane, WA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 2, 9:21 PM PDTSpecial Weather StatementOTXBenewah39 min
Jul 2, 10:00 PM PDTSevere Thunderstorm WarningOTXBenewah, Kootenai, Latah45 min
Jul 2, 10:30 PM PDTSpecial Weather StatementOTXKootenai30 min

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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.