Alert archive / Idaho / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 42, NWS Missoula, MT
NWS Missoula, MT issued this severe thunderstorm warning at Jul 17, 2012, 5:55 PM PDT for Idaho County, Idaho. It was in force for 50 min. 1 report 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, 5:55 PM PDT (00:55 UTC)
- Expired
- Jul 17, 2012, 6:45 PM PDT
- In force
- 50 min
- Issued by
- NWS Missoula, MT
- Area
- Storm-based polygon
County Idaho County, ID
The radar
The Pendleton radar (KPDT), 192 km from the middle of the area, began a volume at 00:59 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, 6:12 PM PDT | HAIL 1.75 | Cottonwood, ID | PUBLIC REPORTED GOLF BALL SIZE HAIL AT HOSPITAL IN COTTONWOOD IDAHO |
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 00:00Z, 0.9 hours before the alert went out and 186 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.
335
WUUS55 KMSO 180055
SVRMSO
IDC049-180145-
/O.NEW.KMSO.SV.W.0042.120718T0055Z-120718T0145Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MISSOULA MT
555 PM PDT TUE JUL 17 2012
THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
WESTERN IDAHO COUNTY IN CENTRAL IDAHO...
* UNTIL 645 PM PDT.
* AT 548 PM PDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM
CAPABLE OF PRODUCING ONE INCH HAIL...AND DAMAGING WINDS IN EXCESS
OF 60 MPH. VERY HEAVY RAIN IS ALSO POSSIBLE...CAUSING MINOR
FLOODING ON ROADWAYS. THIS STORM WAS LOCATED NEAR KEUTERVILLE...OR
ABOUT 17 MILES WEST OF GRANGEVILLE...AND WAS MOVING EAST AT 15 MPH.
* LOCATIONS IMPACTED INCLUDE...COTTONWOOD...FENN...KEUTERVILLE AND
WINONA.
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 4604 11658 4601 11654 4606 11653 4621 11610
4598 11597 4586 11651 4603 11660
TIME...MOT...LOC 0055Z 248DEG 14KT 4598 11643
$$2 follow-up statements
212
WWUS55 KMSO 180116
SVSMSO
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MISSOULA MT
716 PM MDT TUE JUL 17 2012
IDC049-180145-
/O.CON.KMSO.SV.W.0042.000000T0000Z-120718T0145Z/
IDAHO ID-
616 PM PDT TUE JUL 17 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 PM PDT
FOR WESTERN IDAHO COUNTY...
* AT 606 PM PDT...DOPPLER RADAR CONTINUED TO INDICATE A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING GOLF BALL SIZE HAIL...AND
DAMAGING WINDS IN EXCESS OF 50 MPH. THIS STORM WAS LOCATED NEAR
COTTONWOOD...OR ABOUT 13 MILES WEST OF GRANGEVILLE...AND WAS MOVING
EAST AT 15 MPH.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD
TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.
&&
LAT...LON 4604 11658 4601 11654 4606 11653 4621 11610
4598 11597 4586 11651 4603 11660
TIME...MOT...LOC 0116Z 248DEG 14KT 4601 11632
$$143
WWUS55 KMSO 180137
SVSMSO
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MISSOULA MT
737 PM MDT TUE JUL 17 2012
IDC049-180146-
/O.EXP.KMSO.SV.W.0042.000000T0000Z-120718T0145Z/
IDAHO ID-
637 PM PDT TUE JUL 17 2012
...THE SEVERE THUNDERSTORM WARNING FOR WESTERN IDAHO COUNTY EXPIRES
AT 645 PM PDT.
LAT...LON 4604 11658 4601 11654 4606 11653 4621 11610
4598 11597 4586 11651 4603 11660
TIME...MOT...LOC 0136Z 248DEG 14KT 4604 11622
$$The office that day
Everything else NWS Missoula, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 17, 7:57 PM PDT | Special Weather Statement | MSO | Clearwater | 48 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.