Alert archive / Montana / Severe Thunderstorm Watches in 2014
Severe Thunderstorm Watch 197
The Storm Prediction Center issued this severe thunderstorm watch at May 28, 2014, 4:59 PM MDT for 18 counties in Montana. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- May 28, 2014, 4:59 PM MDT (22:59 UTC)
- Expired
- May 28, 2014, 11:56 PM MDT
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2.5 in
- Strongest gust expected
- 60 kt
Counties Blaine County, MT, Chouteau County, MT, Daniels County, MT, Dawson County, MT, Fergus County, MT, Garfield County, MT, Hill County, MT, Judith Basin County, MT, Liberty County, MT, McCone County, MT, Petroleum County, MT, Phillips County, MT, Prairie County, MT, Richland County, MT, Roosevelt County, MT, Sheridan County, MT, Valley County, MT, Wibaux County, MT
The radar
The Glasgow radar (KGGW), 119 km from the middle of the area, began a volume at 23:01 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 SPC expected
The probabilities SPC published with the watch, for the watch area over its life.
- Two or more tornadoes
- 20%
- One or more EF2 to EF5 tornadoes
- 10%
- Ten or more severe wind reports
- 40%
- One or more gusts of 65 knots or more
- 20%
- Ten or more severe hail reports
- 80%
- One or more hailstones of 2 inches or more
- 30%
- Six or more combined severe hail and wind reports
- 90%
Warnings issued inside it
11 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 28, 5:24 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Chouteau, Liberty | 51 min |
| May 28, 5:39 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Chouteau | 51 min |
| May 28, 5:49 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Chouteau, Judith Basin | 56 min |
| May 28, 6:15 PM MDT | Severe Thunderstorm Warning | TFX | Blaine, Chouteau, Fergus, Hill | 60 min |
| May 28, 6:48 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau, Fergus, Judith Basin | 57 min |
| May 28, 7:13 PM MDT | Severe Thunderstorm Warning | TFX | Blaine, Chouteau, Hill | 62 min |
| May 28, 7:47 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, McCone, Prairie | 58 min |
| May 28, 8:07 PM MDT | Severe Thunderstorm Warning | TFX | Blaine | 38 min |
| May 28, 8:34 PM MDT | Severe Thunderstorm Warning | GGW | Phillips, Valley | 56 min |
| May 28, 8:56 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, McCone, Richland | 64 min |
| May 28, 9:25 PM MDT | Severe Thunderstorm Warning | GGW | Phillips, Valley | 65 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Great_falls, MT (KTFX), launched 12:00Z, 11.0 hours before the alert went out and 190 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
- 194 J/kg
- Mixed-layer CIN
- -319 J/kg
- Mixed-layer LCL
- 1098 m above ground
- 0-6 km bulk shear
- 78 kt
- 0-1 km storm-relative helicity
- 56 m²/s²
- 0-3 km storm-relative helicity
- 161 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 27, 6:12 PM MDT | Mesoscale Discussion | SPC | Broadwater, Cascade, Deer Lodge, Fergus, Golden Valley, Granite and 6 more | 48 min |
| May 27, 10:58 PM MDT | Mesoscale Discussion | SPC | Custer, Fallon, Musselshell, Prairie, Rosebud, Treasure | 62 min |
| May 28, 2:51 AM MDT | Mesoscale Discussion | SPC | Dawson, Prairie, Wibaux | 114 min |
| May 28, 2:12 PM MDT | Mesoscale Discussion | SPC | Big Horn, Blaine, Broadwater, Carbon, Cascade, Chouteau and 17 more | 2 hr |
| May 28, 2:47 PM MDT | Severe Thunderstorm Watch | SPC | Big Horn, Broadwater, Carbon, Cascade, Custer, Gallatin and 13 more | 6 hr |
Nearby
Severe Thunderstorm Watches in Montana, 2014Every severe thunderstorm watch in 2014
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.