Idaho, 2021

Excessive Heat in Idaho, June 1 to 30, 2021

June 1 to 30, 2021 · NWS PIH · 1 event in 1 county or zone

7 degrees above the monthly normal.

Where it happened

Every event with a place to put it; 1 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.

  • Tornadoes
  • Tropical storms and surge
  • Floods
  • Wind
  • Hail
  • Winter weather
  • Heat and drought
  • Cold
  • Fire, smoke and dust
  • Marine and coastal
  • Other

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The toll

Deaths
0
Injuries
0
Property damage
None recorded
Crop damage
None recorded
Events
1

Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.

What happened

The episode as NWS PIH wrote it up.

It was the hottest June ever recorded at the Pocatello Regional Airport with an average monthly temperature of 69.9 degrees which was 7.7 degrees above the monthly normal.

What forecasters said that day

The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Pocatello, ID wrote its last area forecast discussion before the first event at May 31, 1:12 PM MST, 10 hours 49 minutes earlier.

Area forecast discussion, May 31, 1:12 PM MST, 10 hours 49 minutes before
Area Forecast Discussion
National Weather Service Pocatello ID
212 PM MDT Mon May 31 2021

.SHORT TERM...Tonight through Wednesday night. Upper ridge
continues to build across the region. Satellite and radar imagery
shows weak convective development across the higher terrain. So
far there is no lightning per observations, but allowed for
isolated thunder. Believe thunder will dissipate before or around
sunset. Rest of the forecast should remain dry with temperatures
continuing to warm well above normal, leading to hot temperatures
toward the end of the week. DMH

.LONG TERM...Thursday through Monday.
Big impact in the long term will be the heat on both Thursday and
Friday as high temperatures are expected to reach well into the 90s
in the Snake River Plain.   May see isolated thunderstorms Friday in
the central mountains and Upper snake River Highlands.  A weak
system and moving of upper ridge to east will allow for some cool
down Saturday with highs back into the 80s in low elevations.  A
cooler pattern looks to be settling in with temperatures likely to
drop again Sunday into Monday but still above normal and the chance
of mainly mountain showers and thunderstorms as well.
GK

&&

.AVIATION...
VFR conditions will continue through Tuesday with only high cloud
cover expected with some mid level cumulus.  Winds are expected to
be 10 knots or less for the most part in the afternoons through
Tuesday as well.
GK

&&

.PIH WATCHES/WARNINGS/ADVISORIES...
None.
&&

The radar

The national radar mosaic for the moment the first event began.

Open the radar archive at this moment

Event by event

1 excessive heat. Local standard time, as filed.

Excessive Heat, Lower Snake River Plain

When
June 1, 12:01 AM MST to June 30, 11:59 PM MST
Where
Lower Snake River Plain forecast zone
Reported by
Official NWS Observations
Coordinates
42.860, -112.488 (the zone’s center; the record gives no point)

It was the hottest June ever recorded at the Pocatello Regional Airport with an average monthly temperature of 69.9 degrees which was 7.7 degrees above the monthly normal.

What these are

Excessive Heat
Heat at or above the local excessive heat warning criteria, or heat that caused deaths.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

More

Every storm in Idaho in 2021Every state in 2021This day in weather historyWarnings in Idaho, June 2021

Sources

NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 965373.