Alert archive / Montana / Heat Advisories in 2018
Heat Advisory 2, NWS Missoula, MT
NWS Missoula, MT issued this heat advisory at Aug 7, 2018, 2:46 PM MDT for 9 counties in Montana; Clearwater County, Idaho County, Idaho. It took effect at Aug 8, 2018, 3:00 PM MDT. It was in force for 54 hr.
The area
The counties it named.
The facts
- Issued
- Aug 7, 2018, 2:46 PM MDT (20:46 UTC)
- In effect from
- Aug 8, 2018, 3:00 PM MDT
- Expired
- Aug 10, 2018, 9:00 PM MDT
- In force
- 54 hr
- Issued by
- NWS Missoula, MT
Counties Clearwater County, ID, Idaho County, ID, Flathead County, MT, Granite County, MT, Lake County, MT, Lincoln County, MT, Mineral County, MT, Missoula County, MT, Powell County, MT, Ravalli County, MT, Sanders County, MT
The radar
The Missoula radar (KMSX), 38 km from the middle of the area, began a volume at 20:44 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.
The nearest sounding before it
Spokane, WA (KOTX), launched 12:00Z, 8.8 hours before the alert went out and 159 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
- 2818 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 55 m²/s²
- 0-3 km storm-relative helicity
- 62 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
Nearby
Heat Advisories in Montana, 2018Heat Advisories in Idaho, 2018Every heat advisory in 2018
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.