Alert archive / Montana / Severe Thunderstorm Warnings in 2017
Severe Thunderstorm Warning 2, NWS Missoula, MT
NWS Missoula, MT issued this severe thunderstorm warning at May 6, 2017, 2:22 PM MDT for Deer Lodge County, Granite County, Montana. It was in force for 23 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
- May 6, 2017, 2:22 PM MDT (20:22 UTC)
- Expired
- May 6, 2017, 2:45 PM MDT
- In force
- 23 min
- Issued by
- NWS Missoula, MT
- Area
- Storm-based polygon
Counties Deer Lodge County, MT, Granite County, MT
The radar
The Missoula radar (KMSX), 110 km from the middle of the area, began a volume at 20:22 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 |
|---|---|---|---|
| May 6, 2:30 PM MDT | HAIL 1 | 8 Wsw Georgetown, MT | RESIDENT REPORTED GROUND COVERED WHITE WITH QUARTER-SIZED HAIL. A FEW STRIKES OF LIGHTNING ACCOMPANIED THE STORM. |
| May 6, 2:42 PM MDT | HAIL 1.25 | 1 W Georgetown, MT | TRAINED SPOTTERS ESTIMATED QUARTER AND HALF DOLLAR SIZED HAIL STONES. THEY WERE WORRIED ABOUT VEHICLE DAMAGE. DID NOT GO OUTSIDE YET TO CHECK VEHICLES. |
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 12:00Z, 8.4 hours before the alert went out and 258 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
- 1696 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- -30 m²/s²
- 0-3 km storm-relative helicity
- 166 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
903 WUUS55 KMSO 062022 SVRMSO MTC023-039-062045- /O.NEW.KMSO.SV.W.0002.170506T2022Z-170506T2045Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service Missoula MT 222 PM MDT SAT MAY 6 2017 The National Weather Service in Missoula has issued a * Severe Thunderstorm Warning for... North central Deer Lodge County in west central Montana... Southeastern Granite County in west central Montana... * Until 245 PM MDT * At 221 PM MDT, Doppler radar indicated a severe thunderstorm capable of producing quarter size hail, heavy rain, and damaging winds in excess of 60 mph. This storm was located 18 miles southwest of Philipsburg, or 27 miles west of Anaconda, and moving northeast at 35 mph. * Locations impacted include... Philipsburg, Georgetown and Porters Corner. 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 4598 11351 4610 11369 4645 11332 4619 11294 TIME...MOT...LOC 2021Z 223DEG 32KT 4611 11352 $$
2 follow-up statements
239 WWUS55 KMSO 062037 SVSMSO Severe Weather Statement National Weather Service Missoula MT 237 PM MDT SAT MAY 6 2017 MTC023-039-062045- /O.CON.KMSO.SV.W.0002.000000T0000Z-170506T2045Z/ Deer Lodge MT-Granite MT- 237 PM MDT SAT MAY 6 2017 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 245 PM MDT FOR NORTH CENTRAL DEER LODGE AND SOUTHEASTERN GRANITE COUNTIES... At 237 PM MDT, Doppler radar indicated a severe thunderstorm capable of producing quarter size hail and damaging winds in excess of 60 mph. This storm was located 9 miles southwest of Philipsburg, or 21 miles west of Anaconda, moving northeast at 35 mph. Locations impacted include... Philipsburg, Georgetown and Porters Corner. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you are in the path of this storm, prepare immediately for large hail and damaging winds. People outside should move to a shelter, preferably inside a strong building and away from windows. In addition to large hail and damaging winds, continuous cloud to ground lightning is occurring with this storm. Move indoors immediately. Lightning is one of nature's leading killers. Remember, if you can hear thunder, you are close enough to be struck by lightning. && LAT...LON 4602 11343 4615 11364 4642 11335 4616 11301 TIME...MOT...LOC 2037Z 223DEG 32KT 4621 11338 $$
766
WWUS55 KMSO 062045
SVSMSO
Severe Weather Statement
National Weather Service Missoula MT
245 PM MDT SAT MAY 6 2017
MTC023-039-062053-
/O.EXP.KMSO.SV.W.0002.000000T0000Z-170506T2045Z/
Deer Lodge MT-Granite MT-
245 PM MDT SAT MAY 6 2017
...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL DEER LODGE AND
SOUTHEASTERN GRANITE COUNTIES WILL EXPIRE AT 245 PM MDT...
Remember, another Severe Thunderstorm Warning still remains in
effect for NORTH CENTRAL DEER LODGE and SOUTHEASTERN GRANITE
COUNTIES until 3:15pm MDT.
LAT...LON 4602 11343 4615 11364 4642 11335 4616 11301
TIME...MOT...LOC 2043Z 223DEG 32KT 4625 11333
$$The office that day
Everything else NWS Missoula, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 5, 6:34 PM MDT | Special Weather Statement | MSO | Deer Lodge | 71 min |
| May 5, 6:57 PM MDT | Special Weather Statement | MSO | Missoula | 48 min |
| May 5, 7:39 PM MDT | Special Weather Statement | MSO | Sanders | 51 min |
| May 5, 7:52 PM MDT | Special Weather Statement | MSO | Lincoln | 68 min |
| May 6, 12:11 PM MDT | Special Weather Statement | MSO | 49 min | |
| May 6, 12:55 PM MDT | Special Weather Statement | MSO | Ravalli | 50 min |
| May 6, 1:26 PM MDT | Severe Thunderstorm Warning | MSO | Ravalli | 34 min |
| May 6, 2:07 PM MDT | Special Weather Statement | MSO | Deer Lodge | 23 min |
| May 6, 2:31 PM MDT | Special Weather Statement | MSO | Silver Bow | 44 min |
| May 6, 2:42 PM MDT | Severe Thunderstorm Warning | MSO | Deer Lodge, Granite | 33 min |
| May 6, 3:16 PM MDT | Severe Thunderstorm Warning | MSO | Powell | 29 min |
| May 6, 3:41 PM MDT | Severe Thunderstorm Warning | MSO | Powell | 34 min |
Nearby
Severe Thunderstorm Warnings in Montana, 2017Every severe thunderstorm warning in 2017
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.