Alert archive / Idaho / Excessive Heat Warnings in 2021
Excessive Heat Warning 1, NWS Boise, ID
NWS Boise, ID issued this excessive heat warning at Jun 1, 2021, 2:10 PM MDT for 7 counties in Idaho; Malheur County, Oregon. It took effect at Jun 3, 2021, 10:00 AM MDT. It was in force for 11 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Jun 1, 2021, 2:10 PM MDT (20:10 UTC)
- In effect from
- Jun 3, 2021, 10:00 AM MDT
- Expired
- Jun 3, 2021, 9:00 PM MDT
- In force
- 11 hr
- Issued by
- NWS Boise, ID
Counties Ada County, ID, Canyon County, ID, Elmore County, ID, Gem County, ID, Owyhee County, ID, Payette County, ID, Washington County, ID, Malheur County, OR
The radar
The Boise radar (KCBX), 25 km from the middle of the area, began a volume at 20:12 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, 8.2 hours before the alert went out and 457 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
- 2477 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 14 m²/s²
- 0-3 km storm-relative helicity
- 47 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this excessive heat warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Boise, ID wrote its last area forecast discussion before this excessive heat warning went out at Jun 1, 9:23 AM MDT, 4 hours 47 minutes earlier.
Area forecast discussion, Jun 1, 9:23 AM MDT, 4 hours 47 minutes before
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</html>The office that day
Everything else NWS Boise, ID issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 1, 2:10 PM MDT | Heat Advisory | BOI | Gooding, Jerome, Twin Falls | 55 hr |
Nearby
Excessive Heat Warnings in Idaho, 2021Excessive Heat Warnings in Oregon, 2021Every excessive heat warning 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.