Alert archive / Montana / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 46, NWS Missoula, MT
NWS Missoula, MT issued this severe thunderstorm warning at Jul 20, 2012, 4:21 PM MDT for Lincoln County, Sanders County, Montana. It was in force for 39 min. 2 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 20, 2012, 4:21 PM MDT (22:21 UTC)
- Expired
- Jul 20, 2012, 5:00 PM MDT
- In force
- 39 min
- Issued by
- NWS Missoula, MT
- Area
- Storm-based polygon
Counties Lincoln County, MT, Sanders County, MT
The radar
The Spokane radar (KOTX), 141 km from the middle of the area, began a volume at 22:21 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 20, 4:44 PM MDT | TSTM WND DMG | 9 Nnw Noxon, MT | POWER OUTAGE ACROSS TOWN |
| Jul 20, 4:44 PM MDT | HAIL 1 | 1 Nw Noxon, MT |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jul 20, 12:38 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Spokane, WA (KOTX), launched 12:00Z, 10.4 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2619 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- -1 m²/s²
- 0-3 km storm-relative helicity
- 66 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
842
WUUS55 KMSO 202221
SVRMSO
MTC053-089-202300-
/O.NEW.KMSO.SV.W.0046.120720T2221Z-120720T2300Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MISSOULA MT
421 PM MDT FRI JUL 20 2012
THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
NORTHWESTERN SANDERS COUNTY IN NORTHWEST MONTANA...
SOUTHWESTERN LINCOLN COUNTY IN NORTHWEST MONTANA...
* UNTIL 500 PM MDT.
* AT 412 PM MDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM
CAPABLE OF PRODUCING ONE INCH HAIL...AND DESTRUCTIVE WINDS IN
EXCESS OF 70 MPH. THIS STORM WAS LOCATED 20 MILES SOUTH OF
NOXON...OR ABOUT 15 MILES NORTH OF OSBURN...AND WAS MOVING
NORTHEAST AT 35 MPH.
* LOCATIONS IMPACTED INCLUDE...HAPPYS INN...HERON...KOOTENAI FALLS...
NOXON...TROUT CREEK...TROY...TUSCOR...WHITE PINE AND YAKT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
DAMAGING WINDS ARE LIKELY WITH THIS SEVERE THUNDERSTORM. LARGE HAIL
IS POSSIBLE...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.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM MDT FRIDAY
EVENING FOR NORTH CENTRAL IDAHO AND NORTHWESTERN MONTANA.
&&
LAT...LON 4865 11605 4810 11506 4753 11566 4757 11572
4761 11570 4764 11574 4770 11574 4776 11584
4782 11586 4798 11606
TIME...MOT...LOC 2221Z 205DEG 30KT 4778 11585
$$
KITSMILLER1 follow-up statement
219
WWUS55 KMSO 202254
SVSMSO
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MISSOULA MT
454 PM MDT FRI JUL 20 2012
MTC053-089-202304-
/O.EXP.KMSO.SV.W.0046.000000T0000Z-120720T2300Z/
LINCOLN MT-SANDERS MT-
454 PM MDT FRI JUL 20 2012
...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN SANDERS AND
SOUTHWESTERN LINCOLN COUNTIES EXPIRES AT 500 PM MDT...
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM MDT FRIDAY
EVENING FOR NORTH CENTRAL IDAHO AND NORTHWESTERN MONTANA.
LAT...LON 4865 11605 4810 11506 4753 11566 4757 11572
4761 11570 4764 11574 4770 11574 4776 11584
4782 11586 4798 11606
TIME...MOT...LOC 2254Z 205DEG 30KT 4803 11567
$$
KITSMILLERThe office that day
Everything else NWS Missoula, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 20, 2:41 PM MDT | Special Weather Statement | MSO | Deer Lodge | 49 min |
| Jul 20, 3:05 PM MDT | Special Weather Statement | MSO | Missoula | 55 min |
| Jul 20, 3:09 PM MDT | Severe Thunderstorm Warning | MSO | Mineral, Missoula, Ravalli, Sanders | 51 min |
| Jul 20, 3:30 PM MDT | Special Weather Statement | MSO | Lake | 60 min |
| Jul 20, 3:46 PM MDT | Special Weather Statement | MSO | Powell | 44 min |
| Jul 20, 3:52 PM MDT | Special Weather Statement | MSO | Sanders | 53 min |
| Jul 20, 4:31 PM MDT | Severe Thunderstorm Warning | MSO | Lincoln, Mineral, Sanders | 59 min |
| Jul 20, 4:32 PM MDT | Special Weather Statement | MSO | Flathead, Lake | 58 min |
| Jul 20, 4:53 PM MDT | Severe Thunderstorm Warning | MSO | Flathead, Lincoln, Sanders | 67 min |
Nearby
Severe Thunderstorm Warnings in Montana, 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.