Alert archive / Idaho / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 6, NWS Spokane, WA

June 12, 2012Lewis County, Nez Perce County, Idaho

NWS Spokane, WA issued this severe thunderstorm warning at Jun 12, 2012, 1:52 PM PDT for Lewis County, Nez Perce County, Idaho. It was in force for 59 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 12, 2012, 1:52 PM PDT (20:52 UTC)
Expired: Jun 12, 2012, 2:51 PM PDT
In force: 59 min
Issued by: NWS Spokane, WA
Area: Storm-based polygon

Counties Lewis County, ID, Nez Perce County, ID

The radar

The Spokane radar (KOTX), 186 km from the middle of the area, began a volume at 20:53 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 12, 1:55 PM PDT	HAIL 0.5	4 Nnw Waha, ID	0.50 INCHES OF RAIN IN 15 MINUTES.
Jun 12, 2:01 PM PDT	HAIL 0.88	Winchester, ID
Jun 12, 2:06 PM PDT	HAIL 1.25	6 S Culdesac, ID

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 12:00Z, 8.9 hours before the alert went out and 164 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: 2033 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 52 m²/s²
0-3 km storm-relative helicity: 59 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.

207 
WUUS56 KOTX 122052
SVROTX
IDC061-069-122145-
/O.NEW.KOTX.SV.W.0006.120612T2052Z-120612T2145Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SPOKANE WA
152 PM PDT TUE JUN 12 2012

THE NATIONAL WEATHER SERVICE IN SPOKANE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  LEWIS COUNTY IN NORTH CENTRAL IDAHO...
  CENTRAL NEZ PERCE COUNTY IN NORTH CENTRAL IDAHO...

* UNTIL 245 PM PDT

* AT 148 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING HALF DOLLAR SIZE HAIL. 
  THIS STORM WAS LOCATED NEAR WAHA...OR 14 MILES SOUTHEAST OF
  LEWISTON...AND MOVING EAST AT 25 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  WINCHESTER...REUBENS...CRAIGMONT...MOHLER AND NEZPERCE

LAT...LON 4616 11688 4634 11690 4642 11620 4628 11608
      4620 11608 4621 11613 4616 11618 4616 11632
      4620 11643 4616 11646
TIME...MOT...LOC 2051Z 265DEG 20KT 4626 11676

$$

FX

3 follow-up statements

462 
WWUS56 KOTX 122106
SVSOTX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SPOKANE WA
206 PM PDT TUE JUN 12 2012

IDC061-069-122145-
/O.CON.KOTX.SV.W.0006.000000T0000Z-120612T2145Z/
LEWIS ID-NEZ PERCE ID-
206 PM PDT TUE JUN 12 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 245 PM PDT
FOR EAST CENTRAL NEZ PERCE AND LEWIS COUNTIES...

AT 201 PM PDT...WEATHER SERVICE RADAR CONTINUED TO DETECT A SEVERE 
THUNDERSTORM CAPABLE OF PRODUCING HALF DOLLAR SIZE HAIL.  THIS STORM 
WAS LOCATED NEAR WINCHESTER...OR 17 MILES SOUTHEAST OF 
LEWISTON...MOVING EAST AT 25 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
REUBENS...CRAIGMONT...MOHLER AND NEZPERCE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

HAIL UP TO THE SIZE OF NICKLES HAS BEEN REPORTED THREE MILES 
NORTHWEST OF WINCHESTER WITH THIS STORM. IF YOU ARE IN THE PATH OF 
THE STORM...TAKE IMMEDIATE ACTION TO PROTECT LIFE AND PROPERTY.

&&

LAT...LON 4617 11669 4636 11672 4642 11620 4628 11608
      4620 11608 4621 11613 4616 11618 4616 11632
      4620 11643 4616 11646
TIME...MOT...LOC 2105Z 265DEG 20KT 4627 11665

$$

FX

822 
WWUS56 KOTX 122125
SVSOTX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SPOKANE WA
225 PM PDT TUE JUN 12 2012

IDC061-069-122145-
/O.CON.KOTX.SV.W.0006.000000T0000Z-120612T2145Z/
LEWIS ID-NEZ PERCE ID-
225 PM PDT TUE JUN 12 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 245 PM PDT
FOR EAST CENTRAL NEZ PERCE AND NORTHERN LEWIS COUNTIES...

AT 219 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL.  THIS STORM WAS LOCATED NEAR REUBENS...OR 20 MILES SOUTHWEST OF
OROFINO...MOVING EAST AT 25 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
CRAIGMONT...MOHLER AND NEZPERCE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

HAIL UP TO THE SIZE OF HALF DOLLARS HAS BEEN REPORTED 6 MILES SOUTH 
OF CULDESAC WITH THIS STORM. IF YOU ARE IN THE PATH OF THE 
STORM...TAKE IMMEDIATE ACTION TO PROTECT LIFE AND PROPERTY.

&&

LAT...LON 4616 11657 4636 11658 4642 11620 4628 11608
      4620 11608 4621 11613 4616 11618 4616 11632
      4620 11643 4616 11646
TIME...MOT...LOC 2122Z 265DEG 20KT 4627 11651

$$

FX

563 
WWUS56 KOTX 122151
SVSOTX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SPOKANE WA
251 PM PDT TUE JUN 12 2012

IDC061-069-122152-
/O.CAN.KOTX.SV.W.0006.000000T0000Z-120612T2145Z/
LEWIS ID-NEZ PERCE ID-
251 PM PDT TUE JUN 12 2012

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL NEZ PERCE AND
NORTHERN LEWIS COUNTIES IS CANCELLED...

THE SEVERE THUNDERSTORM THAT PRODUCED LARGE HAIL ACROSS LEWIS COUNTY 
AND JUST SOUTH OF CULDESAC IN NEZ PERCE COUNTY HAS WEAKENED TO BELOW 
SEVERE LEVELS. HOWEVER...SMALL HAIL LESS THAN DIME SIZE WILL REMAIN 
POSSIBLE ACROSS ALL OF THE EASTERN HALF OF LEWIS COUNTY THROUGH 
AROUND 305 PM PDT. BRIEF DOWNPOURS OF RAIN ARE ALSO LIKELY. WE'LL BE 
WATCHING CLOSELY A STRENGTHENING STORM MOVING EAST ALONG THE LEWIS 
COUNTY LINE JUST NORTH OF FERDINAND WHERE LARGE HAIL WILL BE 
POSSIBLE.   







LAT...LON 4616 11657 4636 11658 4642 11620 4628 11608
      4620 11608 4621 11613 4616 11618 4616 11632
      4620 11643 4616 11646
TIME...MOT...LOC 2142Z 265DEG 20KT 4629 11635

$$

BZ

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 12, 1:32 PM PDT	Special Weather Statement	OTX	Lewis, Nez Perce	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.