Alert archive / Montana / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 20, NWS Missoula, MT
NWS Missoula, MT issued this severe thunderstorm warning at Jun 23, 2012, 2:56 PM MDT for Granite County, Missoula County, Ravalli County, Montana. It was in force for 64 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
- Jun 23, 2012, 2:56 PM MDT (20:56 UTC)
- Expired
- Jun 23, 2012, 4:00 PM MDT
- In force
- 64 min
- Issued by
- NWS Missoula, MT
- Area
- Storm-based polygon
Counties Granite County, MT, Missoula County, MT, Ravalli County, MT
The radar
The Missoula radar (KMSX), 36 km from the middle of the area, began a volume at 20:59 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 |
|---|---|---|---|
| Jun 23, 3:05 PM MDT | HAIL 0.75 | 2 N Quigley, MT | |
| Jun 23, 4:00 PM MDT | HAIL 0.75 | 2 Ssw Greenough, MT | INFORMATION ACQUIRED DURING FOLLOWUP STORM SURVEY. |
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, 8.9 hours before the alert went out and 230 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
- 779 m above ground
- 0-6 km bulk shear
- 59 kt
- 0-1 km storm-relative helicity
- -5 m²/s²
- 0-3 km storm-relative helicity
- 164 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted, in the capitals the NWS used until 2016.
725 WUUS55 KMSO 232056 SVRMSO MTC039-063-081-232200- /O.NEW.KMSO.SV.W.0020.120623T2056Z-120623T2200Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MISSOULA MT 256 PM MDT SAT JUN 23 2012 THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHEASTERN RAVALLI COUNTY IN WEST CENTRAL MONTANA... NORTHWESTERN GRANITE COUNTY IN WEST CENTRAL MONTANA... SOUTHEASTERN MISSOULA COUNTY IN WEST CENTRAL MONTANA... * UNTIL 400 PM MDT. * AT 255 PM MDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING HAIL UP TO ONE INCH IN DIAMETER. THIS STORM WAS LOCATED NEAR QUIGLEY...OR ABOUT 23 MILES WEST OF DRUMMOND...AND WAS MOVING NORTH AT 10 MPH. * LOCATIONS IMPACTED INCLUDE...CLEARWATER...CLINTON...GREENOUGH... NIMROD...POTOMAC...QUIGLEY AND TWIN CREEKS. 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 4702 11377 4704 11331 4650 11353 4653 11383 TIME...MOT...LOC 2056Z 192DEG 9KT 4661 11363 $$
3 follow-up statements
630 WWUS55 KMSO 232127 SVSMSO SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE MISSOULA MT 327 PM MDT SAT JUN 23 2012 MTC081-232137- /O.CAN.KMSO.SV.W.0020.000000T0000Z-120623T2200Z/ RAVALLI MT- 327 PM MDT SAT JUN 23 2012 ...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN RAVALLI COUNTY IS CANCELLED... LAT...LON 4673 11379 4703 11363 4704 11331 4667 11346 TIME...MOT...LOC 2127Z 192DEG 9KT 4669 11361 $$ MTC039-063-232200- /O.CON.KMSO.SV.W.0020.000000T0000Z-120623T2200Z/ MISSOULA MT-GRANITE MT- 327 PM MDT SAT JUN 23 2012 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 400 PM MDT FOR NORTHERN GRANITE AND EASTERN MISSOULA COUNTIES... * AT 322 PM MDT...DOPPLER RADAR CONTINUED TO INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING HAIL UP TO ONE INCH IN DIAMETER. THIS STORM WAS LOCATED 7 MILES WEST OF NIMROD...OR ABOUT 22 MILES WEST OF DRUMMOND...AND WAS MOVING NORTH AT 10 MPH. LAT...LON 4673 11379 4703 11363 4704 11331 4667 11346 TIME...MOT...LOC 2127Z 192DEG 9KT 4669 11361 $$
423
WWUS55 KMSO 232147
SVSMSO
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MISSOULA MT
347 PM MDT SAT JUN 23 2012
MTC039-232157-
/O.CAN.KMSO.SV.W.0020.000000T0000Z-120623T2200Z/
GRANITE MT-
347 PM MDT SAT JUN 23 2012
...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN GRANITE COUNTY IS
CANCELLED...THE STORM HAS LEFT THE COUNTY.
LAT...LON 4683 11340 4683 11341 4680 11341 4680 11347
4674 11348 4674 11354 4672 11355 4671 11368
4673 11379 4703 11363 4704 11331
TIME...MOT...LOC 2147Z 192DEG 9KT 4674 11359
$$
MTC063-232200-
/O.CON.KMSO.SV.W.0020.000000T0000Z-120623T2200Z/
MISSOULA MT-
347 PM MDT SAT JUN 23 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 400 PM MDT
FOR EASTERN MISSOULA COUNTY...
* AT 344 PM MDT...A SEVERE THUNDERSTORM WAS REPORTED CAPABLE OF
PRODUCING HAIL UP TO ONE INCH IN DIAMETER. THIS STORM WAS LOCATED
6 MILES SOUTHEAST OF CLINTON...OR ABOUT 21 MILES SOUTHEAST OF
MISSOULA...AND WAS MOVING NORTH AT 10 MPH.
LAT...LON 4683 11340 4683 11341 4680 11341 4680 11347
4674 11348 4674 11354 4672 11355 4671 11368
4673 11379 4703 11363 4704 11331
TIME...MOT...LOC 2147Z 192DEG 9KT 4674 11359
$$627
WWUS55 KMSO 232153
SVSMSO
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MISSOULA MT
353 PM MDT SAT JUN 23 2012
MTC063-232203-
/O.EXP.KMSO.SV.W.0020.000000T0000Z-120623T2200Z/
MISSOULA MT-
353 PM MDT SAT JUN 23 2012
...THE SEVERE THUNDERSTORM WARNING FOR EASTERN MISSOULA COUNTY
EXPIRES AT 400 PM MDT...
LAT...LON 4683 11340 4683 11341 4680 11341 4680 11347
4674 11348 4674 11354 4672 11355 4671 11368
4673 11379 4703 11363 4704 11331
TIME...MOT...LOC 2153Z 192DEG 9KT 4675 11359
$$The office that day
Everything else NWS Missoula, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 23, 2:43 PM MDT | Special Weather Statement | MSO | Granite | 47 min |
| Jun 23, 2:55 PM MDT | Red Flag Warning | MSO | Beaverhead, Deer Lodge, Granite, Jefferson, Madison, Powell and 1 more | 30 hr |
| Jun 23, 3:56 PM MDT | Special Weather Statement | MSO | Lincoln | 49 min |
| Jun 23, 4:21 PM MDT | Special Weather Statement | MSO | 54 min | |
| Jun 23, 4:25 PM MDT | Severe Thunderstorm Warning | MSO | Lincoln | 31 min |
| Jun 23, 5:51 PM MDT | Special Weather Statement | MSO | Missoula | 39 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.