Alert archive / Idaho / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 1, NWS Spokane, WA

April 24, 2012Bonner County, Idaho

NWS Spokane, WA issued this severe thunderstorm warning at Apr 24, 2012, 2:59 PM PDT for Bonner County, Idaho. It was in force for 46 min. 4 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: Apr 24, 2012, 2:59 PM PDT (21:59 UTC)
Expired: Apr 24, 2012, 3:45 PM PDT
In force: 46 min
Issued by: NWS Spokane, WA
Area: Storm-based polygon

County Bonner County, ID

The radar

The Spokane radar (KOTX), 107 km from the middle of the area, began a volume at 22:01 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
Apr 24, 3:39 PM PDT	HAIL 0.75	Clark Fork, ID
Apr 24, 3:40 PM PDT	HAIL 0.75	2 Sse Clark Fork, ID
Apr 24, 3:43 PM PDT	HAIL 1	3 Se Clark Fork, ID
Apr 24, 3:43 PM PDT	HAIL 1	4 Se Clark Fork, 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, 10.0 hours before the alert went out and 52 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: 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.

177 
WUUS56 KOTX 242159
SVROTX
IDC017-242245-
/O.NEW.KOTX.SV.W.0001.120424T2159Z-120424T2245Z/

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

THE NATIONAL WEATHER SERVICE IN SPOKANE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN BONNER COUNTY IN THE PANHANDLE OF IDAHO...
  THIS INCLUDES THE CITY OF SANDPOINT...

* UNTIL 345 PM PDT

* AT 252 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THIS
  STORM WAS LOCATED NEAR GRANITE...OR 16 MILES SOUTHEAST OF
  NEWPORT...AND MOVING NORTHEAST AT 30 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  CAREYWOOD...COCOLALLA...DOVER...SANDPOINT...GRANITE...PONDERAY...
  KOOTENAI...HOPE...EAST HOPE AND CLARK FORK

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO LARGE HAIL WIND GUSTS TO 35 MPH ARE POSSIBLE AS WELL 
AS CONTINUOUS CLOUD TO GROUND LIGHTNING. IF OUTDOORS AND IN THE PATH 
OF 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.

IF ON OR NEAR LAKE PEND OREILLE...GET OUT OF THE WATER AND MOVE 
INDOORS OR INSIDE A VEHICLE. REMEMBER...LIGHTNING CAN STRIKE OUT TO 
15 MILES FROM THE PARENT THUNDERSTORM. IF YOU CAN HEAR THUNDER...YOU 
ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING. MOVE TO SAFE SHELTER 
NOW. DON'T BE CAUGHT ON THE WATER IN A THUNDERSTORM!

&&

LAT...LON 4826 11603 4813 11604 4797 11669 4798 11679
      4812 11688 4848 11622
TIME...MOT...LOC 2157Z 246DEG 26KT 4807 11670

$$

FX

4 follow-up statements

184 
WWUS56 KOTX 242214
SVSOTX

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

IDC017-242245-
/O.CON.KOTX.SV.W.0001.000000T0000Z-120424T2245Z/
BONNER ID-
314 PM PDT TUE APR 24 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 345 PM PDT
FOR SOUTHERN BONNER COUNTY...

AT 310 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE 
HAIL.  THIS STORM WAS LOCATED NEAR COCOLALLA...OR 13 MILES SOUTH OF 
SANDPOINT...MOVING EAST AT 30 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO 
GRANITE...HOPE...EAST HOPE AND CLARK FORK...AND MUCH OF LAKE PEND 
OREILLE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF ON OR NEAR LAKE PEND OREILLE...GET OUT OF THE WATER AND MOVE 
INDOORS OR INSIDE A VEHICLE. REMEMBER...LIGHTNING CAN STRIKE OUT TO 
15 MILES FROM THE PARENT THUNDERSTORM. IF YOU CAN HEAR THUNDER...YOU 
ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING. MOVE TO SAFE SHELTER 
NOW. DON'T BE CAUGHT ON THE WATER IN A THUNDERSTORM!

&&

LAT...LON 4802 11663 4807 11668 4815 11670 4848 11622
      4826 11603 4813 11604
TIME...MOT...LOC 2213Z 248DEG 27KT 4811 11653

$$

FX

814 
WWUS56 KOTX 242230
SVSOTX

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

IDC017-242245-
/O.CON.KOTX.SV.W.0001.000000T0000Z-120424T2245Z/
BONNER ID-
330 PM PDT TUE APR 24 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 345 PM PDT
FOR CENTRAL BONNER COUNTY...

AT 320 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE 
HAIL.  THIS STORM WAS LOCATED OVER THE CENTER OF LAKE PEND 
OREILLE...OR 12 MILES SOUTHEAST OF SANDPOINT...MOVING EAST AT 30 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO HOPE...
EAST HOPE AND CLARK FORK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF ON OR NEAR LAKE PEND OREILLE...GET OUT OF THE WATER AND MOVE 
INDOORS OR INSIDE A VEHICLE. REMEMBER...LIGHTNING CAN STRIKE OUT TO 
15 MILES FROM THE PARENT THUNDERSTORM. IF YOU CAN HEAR THUNDER...YOU 
ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING. MOVE TO SAFE SHELTER 
NOW. DON'T BE CAUGHT ON THE WATER IN A THUNDERSTORM!

&&

LAT...LON 4802 11663 4807 11668 4815 11670 4848 11622
      4826 11603 4813 11604
TIME...MOT...LOC 2229Z 250DEG 27KT 4815 11636

$$

FX

487 
WWUS56 KOTX 242240
SVSOTX

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

IDC017-242245-
/O.CON.KOTX.SV.W.0001.000000T0000Z-120424T2245Z/
BONNER ID-
340 PM PDT TUE APR 24 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 345 PM PDT
FOR SOUTHEAST BONNER COUNTY...

AT 334 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL.  THIS STORM WAS LOCATED NEAR CLARK FORK...OR 16 MILES SOUTHEAST
OF SANDPOINT...MOVING EAST AT 30 MPH.

THE SEVERE THUNDERSTORM WILL OTHERWISE REMAIN OVER MAINLY RURAL AREAS
OF THE INDICATED COUNTY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO LARGE HAIL...FREQUENT 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 4809 11636 4817 11641 4824 11646 4836 11615
      4826 11603 4813 11604
TIME...MOT...LOC 2239Z 250DEG 27KT 4816 11621

$$

FX

716 
WWUS56 KOTX 242248
SVSOTX

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

IDC017-242257-
/O.EXP.KOTX.SV.W.0001.000000T0000Z-120424T2245Z/
BONNER ID-
348 PM PDT TUE APR 24 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEAST CENTRAL BONNER 
COUNTY HAS EXPIRED...

THE STORM HAS WEAKENED BELOW SEVERE LIMITS HOWEVER THROUGH 400 PM IT 
STILL COULD PRODUCE DIME-SIZED HAIL BETWEEN THE TOWNS OF CLARK FORK 
AND CABINET. 

LAT...LON 4809 11636 4817 11641 4824 11646 4836 11615
      4826 11603 4813 11604
TIME...MOT...LOC 2240Z 250DEG 27KT 4818 11624

$$

FX

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 23, 9:38 PM PDT	River Flood Warning	OTX	Shoshone	3 days
Apr 24, 2:38 PM PDT	Special Weather Statement	OTX	Bonner	52 min
Apr 24, 3:07 PM PDT	Severe Thunderstorm Warning	OTX	Lewis, Nez Perce	37 min
Apr 24, 3:53 PM PDT	Special Weather Statement	OTX	Boundary	37 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.