Alert archive / Montana / Excessive Heat Watches in 2021
Excessive Heat Watch 1, NWS Missoula, MT
NWS Missoula, MT issued this excessive heat watch at Jun 22, 2021, 2:25 PM MDT for 5 counties in Montana; Clearwater County, Idaho County, Idaho. It took effect at Jun 26, 2021, 12:00 PM MDT. It was in force for .
The area
The counties it named.
The facts
- Issued
- Jun 22, 2021, 2:25 PM MDT (20:25 UTC)
- In effect from
- Jun 26, 2021, 12:00 PM MDT
- Expired
- Jun 24, 2021, 2:14 PM MDT
- In force
- Issued by
- NWS Missoula, MT
Counties Clearwater County, ID, Idaho County, ID, Flathead County, MT, Lincoln County, MT, Mineral County, MT, Missoula County, MT, Sanders County, MT
The radar
The Missoula radar (KMSX), 79 km from the middle of the area, began a volume at 20:24 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
Boise Airport, ID (KBOI), launched 12:00Z, 8.4 hours before the alert went out and 428 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
- 33 J/kg
- Mixed-layer CIN
- -396 J/kg
- Mixed-layer LCL
- 2767 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- -81 m²/s²
- 0-3 km storm-relative helicity
- -53 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.0
The office that day
Everything else NWS Missoula, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 22, 5:51 PM MDT | Special Weather Statement | MSO | Lemhi | 24 min |
Nearby
Excessive Heat Watches in Montana, 2021Excessive Heat Watches in Idaho, 2021Every excessive heat watch in 2021
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.