Alert archive / Idaho / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 32, NWS Spokane, WA

July 20, 2012Latah County, Nez Perce County, Idaho

NWS Spokane, WA issued this severe thunderstorm warning at Jul 20, 2012, 12:57 PM PDT for Latah County, Nez Perce County, Idaho. It was in force for 48 min. 5 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 20, 2012, 12:57 PM PDT (19:57 UTC)
Expired: Jul 20, 2012, 1:45 PM PDT
In force: 48 min
Issued by: NWS Spokane, WA
Area: Storm-based polygon

Counties Latah County, ID, Nez Perce County, ID

The radar

The Spokane radar (KOTX), 157 km from the middle of the area, began a volume at 19:58 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
Jul 20, 1:00 PM PDT	HAIL 2.5	4 Sse Juliaetta, ID	CAR DENTS FROM LARGE HAIL. COCORAHS ID-NP-1
Jul 20, 1:00 PM PDT	HAIL 2.75	2 Sw Lenore, ID	MAJOR DAMAGE TO VEHICLE.
Jul 20, 1:15 PM PDT	HAIL 1	Kendrick, ID	PUBLIC REPORTED HAIL.
Jul 20, 1:15 PM PDT	HAIL 2.5	1 Sw Lenore, ID	DENTS IN VEHICLE.
Jul 20, 1:40 PM PDT	HAIL 1	3 N Kendrick, 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
Jul 20, 11:38 AM PDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Spokane, WA (KOTX), launched 12:00Z, 8.0 hours before the alert went out and 136 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: 2619 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: -1 m²/s²
0-3 km storm-relative helicity: 66 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.

079 
WUUS56 KOTX 201957
SVROTX
IDC057-069-202045-
/O.NEW.KOTX.SV.W.0032.120720T1957Z-120720T2045Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SPOKANE WA
1257 PM PDT FRI JUL 20 2012

THE NATIONAL WEATHER SERVICE IN SPOKANE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN NEZ PERCE COUNTY IN NORTH CENTRAL IDAHO...
  SOUTH CENTRAL LATAH COUNTY IN THE PANHANDLE OF IDAHO...

* UNTIL 145 PM PDT

* AT 1254 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING PING PONG BALL SIZE   
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  QUARTER SIZED HAIL 
HAS ALREADY BEEN REPORTED WITH THIS STORM.  THIS STORM WAS LOCATED 
NEAR LAPWAI...OR 8 MILES EAST OF LEWISTON...AND MOVING   NORTHEAST 
AT 35 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  CULDESAC...GIFFORD...JULIAETTA...LENORE...PECK AND KENDRICK

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM PDT FRIDAY
EVENING FOR THE PANHANDLE AND NORTH CENTRAL IDAHO AND EASTERN
WASHINGTON.

&&

LAT...LON 4640 11682 4671 11669 4656 11644 4651 11644
      4650 11638 4649 11636 4647 11636 4647 11641
      4644 11641 4631 11679
TIME...MOT...LOC 1956Z 217DEG 31KT 4642 11682

$$

JW

2 follow-up statements

676 
WWUS56 KOTX 202002
SVSOTX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SPOKANE WA
102 PM PDT FRI JUL 20 2012

IDC057-069-202045-
/O.CON.KOTX.SV.W.0032.000000T0000Z-120720T2045Z/
NEZ PERCE ID-LATAH ID-
102 PM PDT FRI JUL 20 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 145 PM PDT
FOR SOUTH CENTRAL LATAH AND NORTHEASTERN NEZ PERCE COUNTIES...

AT 1258 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE A SEVERE THUNDERSTORM PRODUCING AT LEAST GOLF BALL SIZE 
HAIL...AND POSSIBLE WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS 
LOCATED NEAR LAPWAI...OR 9 MILES EAST OF LEWISTON...MOVING NORTHEAST 
AT 35 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
GIFFORD...JULIAETTA...LENORE...PECK AND KENDRICK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

HAIL UP TO GREATER THAN 1.5 INCHES IN DIAMETER HAS BEEN REPORTED IN 
LAPWAI 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 800 PM PDT FRIDAY
EVENING FOR THE PANHANDLE AND NORTH CENTRAL IDAHO AND EASTERN
WASHINGTON.

&&

LAT...LON 4640 11682 4671 11669 4656 11644 4651 11644
      4650 11638 4649 11636 4647 11636 4647 11641
      4644 11641 4631 11679
TIME...MOT...LOC 2001Z 217DEG 31KT 4645 11678

$$

JW

474 
WWUS56 KOTX 202006
SVSOTX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SPOKANE WA
106 PM PDT FRI JUL 20 2012

IDC057-069-202045-
/O.CON.KOTX.SV.W.0032.000000T0000Z-120720T2045Z/
NEZ PERCE ID-LATAH ID-
106 PM PDT FRI JUL 20 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 145 PM PDT
FOR SOUTH CENTRAL LATAH AND NORTHEASTERN NEZ PERCE COUNTIES...

AT 102 PM PDT...A SEVERE THUNDERSTORM WAS REPORTED CAPABLE OF 
PRODUCING BASEBALL SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  
THIS STORM WAS LOCATED NEAR LAPWAI...OR 11 MILES NORTHEAST OF 
LEWISTON...MOVING NORTHEAST AT 35 MPH.  HAIL GREATER THAN 1.5 
INCHES IN DIAMETER HAS ALREADY BEEN REPORTED WITH THIS STORM.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
GIFFORD...JULIAETTA...LENORE...PECK AND KENDRICK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM PDT FRIDAY
EVENING FOR THE PANHANDLE AND NORTH CENTRAL IDAHO AND EASTERN
WASHINGTON.

&&

LAT...LON 4640 11682 4671 11669 4656 11644 4651 11644
      4650 11638 4649 11636 4647 11636 4647 11641
      4644 11641 4631 11679
TIME...MOT...LOC 2004Z 217DEG 31KT 4647 11676

$$

JW

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 19, 7:09 PM PDT	Special Weather Statement	OTX	Nez Perce	51 min
Jul 20, 12:39 PM PDT	Severe Thunderstorm Warning	OTX	Latah, Nez Perce	51 min
Jul 20, 1:04 PM PDT	Areal Flood Advisory	OTX	Nez Perce	4 hr
Jul 20, 1:18 PM PDT	Severe Thunderstorm Warning	OTX	Benewah, Latah, Nez Perce, Shoshone	42 min
Jul 20, 2:00 PM PDT	Severe Thunderstorm Warning	OTX	Benewah, Latah, Shoshone	45 min
Jul 20, 2:07 PM PDT	Severe Thunderstorm Warning	OTX	Latah, Nez Perce	38 min
Jul 20, 2:21 PM PDT	Severe Thunderstorm Warning	OTX	Bonner, Kootenai	39 min
Jul 20, 2:41 PM PDT	Severe Thunderstorm Warning	OTX	Kootenai, Shoshone	49 min
Jul 20, 2:58 PM PDT	Severe Thunderstorm Warning	OTX	Shoshone	47 min
Jul 20, 3:17 PM PDT	Severe Thunderstorm Warning	OTX	Kootenai	43 min
Jul 20, 3:18 PM PDT	Areal Flood Advisory	OTX	Latah	117 min
Jul 20, 3:20 PM PDT	Severe Thunderstorm Warning	OTX	Benewah, Kootenai, Latah	40 min
Jul 20, 3:35 PM PDT	Areal Flood Warning	OTX	Bonner, Boundary, Kootenai, Shoshone	4 hr
Jul 20, 3:37 PM PDT	Severe Thunderstorm Warning	OTX	Bonner, Boundary	53 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.