Alert archive / Idaho / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 41, NWS Missoula, MT
NWS Missoula, MT issued this severe thunderstorm warning at Jul 17, 2012, 4:57 PM PDT for Idaho County, Idaho. It was in force for 41 min. 3 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 17, 2012, 4:57 PM PDT (23:57 UTC)
- Expired
- Jul 17, 2012, 5:38 PM PDT
- In force
- 41 min
- Issued by
- NWS Missoula, MT
- Area
- Storm-based polygon
County Idaho County, ID
The radar
The Missoula radar (KMSX), 171 km from the middle of the area, began a volume at 23:57 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 17, 5:00 PM PDT | HAIL 0.5 | 1 Nne Elk City, ID | HEAVY RAIN ALSO FELL 0.50 INCHES IN 20 MINUTES. |
| Jul 17, 5:15 PM PDT | HAIL 1 | 5 N Elk City, ID | PUBLIC REPORTED QUARTER SIZE HAIL THAT COVERED THE GROUND UP TO 1.5 INCHES DEEP. |
| Jul 17, 5:20 PM PDT | HAIL 0.5 | Elk City, ID | HALF INCH HAIL REPORTED BY TRAINED SPOTTER IN ELK CITY |
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, 12.0 hours before the alert went out and 215 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
- 126 J/kg
- Mixed-layer CIN
- -169 J/kg
- Mixed-layer LCL
- 1286 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 10 m²/s²
- 0-3 km storm-relative helicity
- 155 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.6
The text
As transmitted, in the capitals the NWS used until 2016.
453 WUUS55 KMSO 172357 SVRMSO IDC049-180045- /O.NEW.KMSO.SV.W.0041.120717T2357Z-120718T0045Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MISSOULA MT 457 PM PDT TUE JUL 17 2012 THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... CENTRAL IDAHO COUNTY IN CENTRAL IDAHO... * UNTIL 545 PM PDT. * AT 448 PM PDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING ONE INCH HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR OROGRANDE...OR ABOUT 36 MILES SOUTHEAST OF GRANGEVILLE...AND WAS MOVING NORTH AT 15 MPH. * LOCATIONS IMPACTED INCLUDE...ELK CITY AND OROGRANDE. PRECAUTIONARY/PREPAREDNESS ACTIONS... SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS AND HAIL...ALONG WITH FREQUENT LIGHTNING AND HEAVY RAIN. FOR YOUR PROTECTION...GO INDOORS AND STAY AWAY FROM WINDOWS. IF YOU ARE CAUGHT OUTSIDE...MOVE TO A WELL PROTECTED AREA. && LAT...LON 4603 11557 4601 11522 4565 11532 4567 11558 TIME...MOT...LOC 2356Z 186DEG 12KT 4573 11545 $$
1 follow-up statement
460 WWUS55 KMSO 180038 SVSMSO SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE MISSOULA MT 638 PM MDT TUE JUL 17 2012 IDC049-180048- /O.CAN.KMSO.SV.W.0041.000000T0000Z-120718T0045Z/ IDAHO ID- 538 PM PDT TUE JUL 17 2012 ...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL IDAHO COUNTY IS CANCELLED... LAT...LON 4603 11557 4601 11522 4565 11532 4567 11558 TIME...MOT...LOC 0038Z 186DEG 12KT 4587 11543 $$
The office that day
Everything else NWS Missoula, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 17, 4:43 PM PDT | Special Weather Statement | MSO | Idaho | 47 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.