Alert archive / Idaho / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 29, NWS Spokane, WA
NWS Spokane, WA issued this severe thunderstorm warning at Jul 17, 2012, 6:32 PM PDT for Lewis County, Nez Perce County, Idaho; Asotin County, Washington. It was in force for 43 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Jul 17, 2012, 6:32 PM PDT (01:32 UTC)
- Expired
- Jul 17, 2012, 7:15 PM PDT
- In force
- 43 min
- Issued by
- NWS Spokane, WA
- Area
- Storm-based polygon
Counties Lewis County, ID, Nez Perce County, ID, Asotin County, WA
The radar
The Pendleton radar (KPDT), 164 km from the middle of the area, began a volume at 01:34 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.
The nearest sounding before it
Spokane, WA (KOTX), launched 00:00Z, 1.5 hours before the alert went out and 189 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.
- Mixed-layer CAPE
- 449 J/kg
- Mixed-layer CIN
- -97 J/kg
- Mixed-layer LCL
- 1747 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 7 m²/s²
- 0-3 km storm-relative helicity
- 48 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
The text
As transmitted, in the capitals the NWS used until 2016.
881
WUUS56 KOTX 180132
SVROTX
IDC061-069-WAC003-180215-
/O.NEW.KOTX.SV.W.0029.120718T0132Z-120718T0215Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SPOKANE WA
632 PM PDT TUE JUL 17 2012
THE NATIONAL WEATHER SERVICE IN SPOKANE HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
SOUTHWESTERN LEWIS COUNTY IN NORTH CENTRAL IDAHO...
SOUTHWESTERN NEZ PERCE COUNTY IN NORTH CENTRAL IDAHO...
SOUTHEASTERN ASOTIN COUNTY IN SOUTHEAST WASHINGTON...
* UNTIL 715 PM PDT
* AT 629 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. THIS STORM WAS
LOCATED 7 MILES SOUTH OF ANATONE...OR 26 MILES SOUTH OF LEWISTON...
AND MOVING NORTHEAST AT 25 MPH.
* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
ANATONE AND WAHA
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THIS STORM WILL ALSO PRODUCE EXTREMELY HEAVY RAINFALL. IF DRIVING
THROUGH THE STORM REDUCE YOUR SPEED TO LOWER THE RISK OF
HYDROPLANING. ALSO BE PREPARED FOR PONDING OF WATER IN LOW LYING
AREAS.
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 4599 11692 4599 11728 4603 11734 4639 11682
4606 11650 4601 11651 4600 11655 4603 11659
4603 11664 4600 11663 4599 11670 4596 11674
4590 11673 4590 11686
TIME...MOT...LOC 0132Z 243DEG 23KT 4604 11708
$$
VAN HORN1 follow-up statement
315
WWUS56 KOTX 180205
SVSOTX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SPOKANE WA
705 PM PDT TUE JUL 17 2012
WAC003-180215-
/O.CAN.KOTX.SV.W.0029.000000T0000Z-120718T0215Z/
ASOTIN WA-
705 PM PDT TUE JUL 17 2012
...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL ASOTIN COUNTY IS
CANCELLED...
LAT...LON 4603 11693 4610 11696 4617 11692 4620 11696
4623 11695 4628 11698 4639 11682 4609 11652
TIME...MOT...LOC 0205Z 234DEG 26KT 4620 11679
$$
IDC061-069-180215-
/O.CON.KOTX.SV.W.0029.000000T0000Z-120718T0215Z/
LEWIS ID-NEZ PERCE ID-
705 PM PDT TUE JUL 17 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM PDT
FOR CENTRAL NEZ PERCE AND CENTRAL LEWIS COUNTIES...
AT 703 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND STRONG WINDS IN EXCESS OF 40 MPH. THIS STORM WAS
LOCATED NEAR WAHA...OR 16 MILES SOUTHEAST OF LEWISTON...MOVING
NORTHEAST AT 30 MPH.
THE SEVERE THUNDERSTORM WILL OTHERWISE REMAIN OVER MAINLY RURAL AREAS
OF THE INDICATED COUNTIES.
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 4603 11693 4610 11696 4617 11692 4620 11696
4623 11695 4628 11698 4639 11682 4609 11652
TIME...MOT...LOC 0205Z 234DEG 26KT 4620 11679
$$
VAN HORNThe office that day
Everything else NWS Spokane, WA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 17, 7:14 PM PDT | Severe Thunderstorm Warning | OTX | Lewis, Nez Perce | 45 min |
| Jul 17, 6:12 PM PDT | Special Weather Statement | OTX | Asotin | 48 min |
| Jul 17, 9:35 PM PDT | Special Weather Statement | OTX | Douglas | 40 min |
Nearby
Severe Thunderstorm Warnings in Idaho, 2012Severe Thunderstorm Warnings in Washington, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.