Alert archive / Montana / Severe Thunderstorm Warnings in 2016
Severe Thunderstorm Warning 13, NWS Missoula, MT
NWS Missoula, MT issued this severe thunderstorm warning at Jul 17, 2016, 10:08 PM MDT for Granite County, Missoula County, Powell County, Montana. It was in force for 52 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, 2016, 10:08 PM MDT (04:08 UTC)
- Expired
- Jul 17, 2016, 11:00 PM MDT
- In force
- 52 min
- Issued by
- NWS Missoula, MT
- Area
- Storm-based polygon
Counties Granite County, MT, Missoula County, MT, Powell County, MT
The radar
The Missoula radar (KMSX), 68 km from the middle of the area, began a volume at 04:07 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, 10:10 PM MDT | HAIL 1 | 4 Sse Clinton, MT | REPORTED AT 81 ROCK CREEK RD, CLINTON, MT 59825. |
| Jul 17, 10:25 PM MDT | HAIL 0.5 | 4 Se Clinton, MT | REPORTED AT 24210 BONITA RANGER STATION RD, CLINTON, MT 59825. |
| Jul 17, 10:25 PM MDT | HAIL 0.5 | 4 Se Clinton, MT | REPORTED AT 7 ROCK CREEK RD, CLINTON, MT 59825. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Great_falls, MT (KTFX), launched 00:00Z, 4.1 hours before the alert went out and 206 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
- 271 J/kg
- Mixed-layer CIN
- -59 J/kg
- Mixed-layer LCL
- 2236 m above ground
- 0-6 km bulk shear
- 62 kt
- 0-1 km storm-relative helicity
- 42 m²/s²
- 0-3 km storm-relative helicity
- 135 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.7
The text
As transmitted.
669
WUUS55 KMSO 180408
SVRMSO
MTC039-063-077-180500-
/O.NEW.KMSO.SV.W.0013.160718T0408Z-160718T0500Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MISSOULA MT
1008 PM MDT SUN JUL 17 2016
THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
NORTHEASTERN GRANITE COUNTY IN WEST CENTRAL MONTANA...
SOUTHEASTERN MISSOULA COUNTY IN WEST CENTRAL MONTANA...
WEST CENTRAL POWELL COUNTY IN WEST CENTRAL MONTANA...
* UNTIL 1100 PM MDT
* AT 1008 PM MDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM
CAPABLE OF PRODUCING QUARTER SIZE HAIL AND DAMAGING WINDS IN
EXCESS OF 60 MPH. THIS STORM WAS LOCATED 17 MILES EAST OF BONNER-
WEST RIVERSIDE...OR 20 MILES NORTHWEST OF DRUMMOND...AND MOVING
NORTHEAST AT 45 MPH.
* LOCATIONS IMPACTED INCLUDE...
OVANDO...CLINTON...POTOMAC...HELMVILLE...CLEARWATER...GREENOUGH...
WOODWORTH...BEARMOUTH...NIMROD AND GARNET.
* THIS STORM HAS A HISTORY OF PRODUCING LARGE HAIL. SEEK SHELTER NOW
INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS!
* LOCALIZED FLOODING MAY BE POSSIBLE IN SUSCEPTIBLE AREAS.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS...DESTRUCTIVE
HAIL...DEADLY LIGHTNING AND VERY HEAVY RAIN. FOR YOUR
PROTECTION...MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE
INTO AREAS WHERE WATER COVERS THE ROAD.
TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY LEAD
TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.
&&
LAT...LON 4660 11350 4681 11381 4721 11333 4684 11279
4683 11279 4683 11277 4680 11273
TIME...MOT...LOC 0408Z 218DEG 37KT 4680 11354
$$3 follow-up statements
019
WWUS55 KMSO 180431
SVSMSO
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MISSOULA MT
1031 PM MDT SUN JUL 17 2016
MTC039-063-077-180500-
/O.CON.KMSO.SV.W.0013.000000T0000Z-160718T0500Z/
GRANITE MT-MISSOULA MT-POWELL MT-
1031 PM MDT SUN JUL 17 2016
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1100 PM MDT
FOR NORTHEASTERN GRANITE...SOUTHEASTERN MISSOULA AND WEST CENTRAL
POWELL COUNTIES...
AT 1028 PM MDT...THE PUBLIC REPORTED A SEVERE THUNDERSTORM PRODUCING
UP TO QUARTER SIZE HAIL AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS
STORM WAS LOCATED 10 MILES WEST OF OVANDO...OR 22 MILES NORTHWEST OF
DRUMMOND...MOVING NORTHEAST AT 45 MPH. HEAVY RAIN COULD CAUSE
LOCALIZED FLOODING.
IN ADDITION...A SPOTTER FROM ROCK CREEK REPORTED HEAVY AMOUNTS OF
NICKEL SIZED HAIL. THIS STORM HAS A HISTORY OF PRODUCING LARGER HAIL
1 INCH IN DIAMETER, AND SHOULD THIS STORM INTENSIFY FURTHER, COULD
PRODUCE LARGE HAIL AGAIN.
LOCATIONS IMPACTED INCLUDE...
OVANDO...POTOMAC...HELMVILLE...CLEARWATER...GREENOUGH...WOODWORTH...
BEARMOUTH...NIMROD AND GARNET.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY. LIGHTNING IS ONE OF NATURE'S LEADING KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.
&&
LAT...LON 4662 11341 4683 11376 4721 11333 4684 11279
4683 11279 4683 11277 4680 11273
TIME...MOT...LOC 0428Z 218DEG 37KT 4697 11335
$$574
WWUS55 KMSO 180435
SVSMSO
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MISSOULA MT
1035 PM MDT SUN JUL 17 2016
MTC039-063-077-180500-
/O.CON.KMSO.SV.W.0013.000000T0000Z-160718T0500Z/
GRANITE MT-MISSOULA MT-POWELL MT-
1035 PM MDT SUN JUL 17 2016
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1100 PM MDT
FOR NORTHEASTERN GRANITE...SOUTHEASTERN MISSOULA AND WEST CENTRAL
POWELL COUNTIES...
AT 1034 PM MDT...TRAINED WEATHER SPOTTER JUST SOUTH OF ROCK CREEK
REPORTED A SEVERE THUNDERSTORM PRODUCING QUARTER SIZE HAIL. THIS
STORM WAS LOCATED 7 MILES WEST OF OVANDO...OR 25 MILES NORTH OF
DRUMMOND...MOVING NORTHEAST AT 45 MPH.
WINDS IN EXCESS OF 60 MPH AND
HEAVY RAINFALL SHOULD ALSO BE EXPECTED WITH THIS STORM. LOCALIZED
FLOODING MAY OCCUR AS A RESULT OF HEAVY RAINFALL.
LOCATIONS IMPACTED INCLUDE...
OVANDO...POTOMAC...HELMVILLE...CLEARWATER...GREENOUGH...WOODWORTH...
BEARMOUTH...NIMROD AND GARNET.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THIS STORM HAS A HISTORY OF PRODUCING LARGE HAIL. SEEK SHELTER NOW
INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS!
&&
LAT...LON 4662 11341 4683 11376 4721 11333 4684 11279
4683 11279 4683 11277 4680 11273
TIME...MOT...LOC 0434Z 218DEG 37KT 4702 11329
$$426
WWUS55 KMSO 180449
SVSMSO
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MISSOULA MT
1049 PM MDT SUN JUL 17 2016
MTC039-063-077-180500-
/O.CON.KMSO.SV.W.0013.000000T0000Z-160718T0500Z/
GRANITE MT-MISSOULA MT-POWELL MT-
1049 PM MDT SUN JUL 17 2016
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1100 PM MDT
FOR NORTHEASTERN GRANITE...EAST CENTRAL MISSOULA AND WEST CENTRAL
POWELL COUNTIES...
AT 1049 PM MDT...A DANGEROUS STORM WITH A HISTORY OF PRODUCING
QUARTER SIZE HAIL AND DAMAGING WINDS IN EXCESS OF 60 MPH WAS LOCATED
8 MILES NORTH OF OVANDO...OR 32 MILES NORTH OF DRUMMOND...MOVING
NORTHEAST AT 45 MPH.
LOCATIONS IMPACTED INCLUDE...
OVANDO...HELMVILLE...CLEARWATER...GREENOUGH...GARNET AND WOODWORTH.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THIS STORM HAS A HISTORY OF PRODUCING LARGE HAIL. SEEK SHELTER NOW
INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS!
&&
LAT...LON 4668 11320 4697 11360 4721 11333 4684 11279
4683 11279 4683 11277 4680 11273
TIME...MOT...LOC 0449Z 218DEG 37KT 4714 11315
$$The office that day
Everything else NWS Missoula, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 17, 6:38 PM MDT | Special Weather Statement | MSO | Powell | 37 min |
| Jul 17, 8:04 PM MDT | Special Weather Statement | MSO | Powell | 41 min |
| Jul 17, 8:15 PM MDT | Special Weather Statement | MSO | 60 min | |
| Jul 17, 8:49 PM MDT | Special Weather Statement | MSO | Powell | 26 min |
| Jul 17, 8:58 PM MDT | Special Weather Statement | MSO | Missoula | 77 min |
| Jul 17, 9:27 PM MDT | Severe Thunderstorm Warning | MSO | Granite, Lake, Missoula, Ravalli | 33 min |
| Jul 17, 9:46 PM MDT | Special Weather Statement | MSO | Powell | 44 min |
| Jul 17, 10:04 PM MDT | Special Weather Statement | MSO | Missoula | 56 min |
| Jul 18, 4:13 PM MDT | Special Weather Statement | MSO | Lincoln | 47 min |
| Jul 18, 4:21 PM MDT | Special Weather Statement | MSO | Lincoln | 54 min |
| Jul 18, 4:25 PM MDT | Severe Thunderstorm Warning | MSO | Lincoln | 35 min |
| Jul 18, 4:59 PM MDT | Severe Thunderstorm Warning | MSO | Flathead, Lincoln | 46 min |
| Jul 18, 5:23 PM MDT | Special Weather Statement | MSO | Lincoln | 22 min |
| Jul 18, 5:38 PM MDT | Special Weather Statement | MSO | 37 min |
Nearby
Severe Thunderstorm Warnings in Montana, 2016Every severe thunderstorm warning in 2016
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.