Alert archive / Idaho / Severe Thunderstorm Warnings in 2015
Severe Thunderstorm Warning 21, NWS Spokane, WA
NWS Spokane, WA issued this severe thunderstorm warning at Aug 10, 2015, 9:27 PM PDT for Bonner County, Boundary County, Idaho. It was in force for 48 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
- Aug 10, 2015, 9:27 PM PDT (04:27 UTC)
- Expired
- Aug 10, 2015, 10:15 PM PDT
- In force
- 48 min
- Issued by
- NWS Spokane, WA
- Area
- Storm-based polygon
Counties Bonner County, ID, Boundary County, ID
The radar
The Spokane radar (KOTX), 116 km from the middle of the area, began a volume at 04:28 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, 4.5 hours before the alert went out and 83 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
- 650 J/kg
- Mixed-layer CIN
- -65 J/kg
- Mixed-layer LCL
- 2888 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- -14 m²/s²
- 0-3 km storm-relative helicity
- 35 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.0
The text
As transmitted, in the capitals the NWS used until 2016.
283 WUUS56 KOTX 110427 SVROTX IDC017-021-110515- /O.NEW.KOTX.SV.W.0021.150811T0427Z-150811T0515Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE SPOKANE WA 927 PM PDT MON AUG 10 2015 THE NATIONAL WEATHER SERVICE IN SPOKANE HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTH CENTRAL BOUNDARY COUNTY IN THE PANHANDLE OF IDAHO... NORTHWESTERN BONNER COUNTY IN THE PANHANDLE OF IDAHO... * UNTIL 1015 PM PDT * AT 915 PM PDT...EMERGENCY MANAGEMENT REPORTED A SEVERE THUNDERSTORM PRODUCING DAMAGING WINDS STRONG ENOUGH TO DOWN A FEW POWER LINES IN COCOLALLA. THIS STORM WAS LOCATED 8 MILES NORTHWEST OF DOVER...OR 8 MILES WEST OF SANDPOINT...AND MOVING NORTH AT 30 MPH. PENNY SIZE HAIL MAY ALSO ACCOMPANY THE DAMAGING WINDS. ANOTHER STORM WAS STRENGTHENING JUST SOUTH OF THE BOUNDARY COUNTY LINE NEAR COLBURN...WHICH WILL PRODUCE THE SAME DANGEROUS WEATHER. * LOCATIONS IMPACTED INCLUDE... SANDPOINT...COLBURN...PRIEST LAKE... NAPLES AND POTENTIALLY AS FAR NORTH AS BONNERS FERRY BY 1015 PM. THOSE ATTENDING THE SANDPOINT FESTIVAL...AS WELL AS THE SANDPOINT CONCERT SERIES NEED TO TAKE IMMEDIATE ACTION. SEEK SHELTER NOW. PRECAUTIONARY/PREPAREDNESS ACTIONS... THIS STORM HAS A HISTORY OF PRODUCING WIND DAMAGE. THIS IS A VERY DANGEROUS SITUATION. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS. && LAT...LON 4827 11633 4821 11684 4870 11703 4875 11628 TIME...MOT...LOC 0416Z 170DEG 24KT 4835 11671 $$ BZ
1 follow-up statement
851 WWUS56 KOTX 110507 SVSOTX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE SPOKANE WA 1007 PM PDT MON AUG 10 2015 IDC017-021-110515- /O.CON.KOTX.SV.W.0021.000000T0000Z-150811T0515Z/ BOUNDARY ID-BONNER ID- 1007 PM PDT MON AUG 10 2015 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1015 PM PDT FOR SOUTH CENTRAL BOUNDARY AND NORTHWESTERN BONNER COUNTIES... AT 1000 PM...THE LARGE AREA OF THUNDERSTORMS THAT PROMPTED A SEVERE THUNDERSTORM WARNING HAS WEAKENED CONSIDERABLY...STRETCHING FROM COLBURN TO BONNERS FERRY AND PRIEST LAKE. WE'LL LET THE WARNING EXPIRE AT 1015 PM. WINDS GUSTS TO 35 MPH AND DANGEROUS LIGHTNING CAN BE EXPECTED. PRECAUTIONARY/PREPAREDNESS ACTIONS... THIS STORM HAS A HISTORY OF PRODUCING WIND DAMAGE NEAR LAKE PEND OREILLE...BUT DAMAGING WINDS ARE NO LONGER EXPECTED FOR THE WARNED AREA. && LAT...LON 4827 11633 4821 11684 4870 11703 4875 11628 TIME...MOT...LOC 0500Z 170DEG 24KT 4867 11669 $$ BZ
The office that day
Everything else NWS Spokane, WA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 10, 5:53 PM PDT | Flash Flood Warning | OTX | Shoshone | 3 hr |
| Aug 10, 6:24 PM PDT | Special Weather Statement | OTX | Shoshone | 36 min |
| Aug 11, 3:37 PM PDT | Heat Advisory | OTX | Benewah, Latah, Lewis, Nez Perce | 52 hr |
Nearby
Severe Thunderstorm Warnings in Idaho, 2015Every severe thunderstorm warning in 2015
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.