Alert archive / Idaho / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 2, NWS Spokane, WA

April 24, 2012Lewis County, Nez Perce County, Idaho

NWS Spokane, WA issued this severe thunderstorm warning at Apr 24, 2012, 3:07 PM PDT for Lewis County, Nez Perce County, Idaho. It was in force for 37 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
Apr 24, 2012, 3:07 PM PDT (22:07 UTC)
Expired
Apr 24, 2012, 3:44 PM PDT
In force
37 min
Issued by
NWS Spokane, WA
Area
Storm-based polygon

Counties Lewis County, ID, Nez Perce County, ID

The radar

The Spokane radar (KOTX), 177 km from the middle of the area, began a volume at 22:11 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
Apr 24, 3:35 PM PDTHAIL 0.52 N Winchester, 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, 10.1 hours before the alert went out and 156 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 12:00Z on 2012-04-24Temperature 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°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Spokane, WA at 12:00Z on 2012-04-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 52 square meters per square second.19395878Sfc1 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
0 m above ground
0-6 km bulk shear
46 kt
0-1 km storm-relative helicity
52 m²/s²
0-3 km storm-relative helicity
92 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.

650 
WUUS56 KOTX 242207
SVROTX
IDC061-069-242300-
/O.NEW.KOTX.SV.W.0002.120424T2207Z-120424T2300Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SPOKANE WA
307 PM PDT TUE APR 24 2012

THE NATIONAL WEATHER SERVICE IN SPOKANE HAS ISSUED A

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

* UNTIL 400 PM PDT

* AT 304 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 9 MILES
  SOUTH OF WINCHESTER...OR 25 MILES SOUTHEAST OF LEWISTON...AND
  MOVING NORTHEAST AT 30 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  WINCHESTER...CULDESAC...CRAIGMONT...REUBENS...GIFFORD...LENORE...
  MOHLER...NEZPERCE...PECK...SOUTHWICK AND SPALDING

LAT...LON 4613 11694 4616 11694 4663 11647 4662 11644
      4651 11644 4650 11638 4642 11630 4642 11620
      4630 11612 4625 11604 4616 11626 4620 11643
      4607 11651 4600 11671
TIME...MOT...LOC 2206Z 237DEG 24KT 4612 11666

$$

SB
2 follow-up statements
618 
WWUS56 KOTX 242232
SVSOTX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SPOKANE WA
332 PM PDT TUE APR 24 2012

IDC061-069-242300-
/O.CON.KOTX.SV.W.0002.000000T0000Z-120424T2300Z/
LEWIS ID-NEZ PERCE ID-
332 PM PDT TUE APR 24 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 400 PM PDT
FOR NORTHEASTERN NEZ PERCE AND LEWIS COUNTIES...

AT 330 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS
LOCATED 7 MILES SOUTH OF CRAIGMONT...OR 20 MILES WEST OF KAMIAH...
MOVING NORTHEAST AT 25 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
GIFFORD...LENORE...MOHLER...PECK...NEZPERCE...SOUTHWICK AND SPALDING.

LAT...LON 4615 11668 4621 11673 4663 11647 4662 11644
      4651 11644 4650 11638 4642 11630 4642 11620
      4630 11612 4625 11604 4616 11626 4620 11643
      4618 11644
TIME...MOT...LOC 2232Z 243DEG 23KT 4616 11642

$$

SB
337 
WWUS56 KOTX 242244
SVSOTX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SPOKANE WA
344 PM PDT TUE APR 24 2012

IDC061-069-242254-
/O.CAN.KOTX.SV.W.0002.000000T0000Z-120424T2300Z/
LEWIS ID-NEZ PERCE ID-
344 PM PDT TUE APR 24 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN NEZ PERCE AND
LEWIS COUNTIES IS CANCELLED...

DOPPLER RADAR INDICATED THE STORM WAS NO LONGER SEVERE AND THE
WARNING WAS ALLOWED TO EXPIRE. .

LAT...LON 4615 11668 4621 11673 4663 11647 4662 11644
      4651 11644 4650 11638 4642 11630 4642 11620
      4630 11612 4625 11604 4616 11626 4620 11643
      4618 11644
TIME...MOT...LOC 2244Z 243DEG 23KT 4619 11632

$$

SB

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 23, 9:38 PM PDTRiver Flood WarningOTXShoshone3 days
Apr 24, 2:38 PM PDTSpecial Weather StatementOTXBonner52 min
Apr 24, 2:59 PM PDTSevere Thunderstorm WarningOTXBonner46 min
Apr 24, 3:53 PM PDTSpecial Weather StatementOTXBoundary37 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.