Idaho, 2020

Heavy Snow in Idaho, March 30 to 31, 2020

March 30 to 31, 2020 · NWS PIH · 6 events in 6 counties and zones

More than a foot of snow fell at high elevations of southeast Idaho the last two days of March.

Where it happened

Every event with a place to put it; 6 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

Open the live radar over this ground

The toll

Deaths
0
Injuries
0
Property damage
None recorded
Crop damage
None recorded
Events
6

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.

More than a foot of snow fell at high elevations of southeast Idaho the last two days of March.

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 Mar 29, 12:50 PM MST, 21 hours 10 minutes earlier.

Area forecast discussion, Mar 29, 12:50 PM MST, 21 hours 10 minutes before
<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

The radar

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

Open the radar archive at this moment

Event by event

6 heavy snow. Local standard time, as filed.

Heavy Snow, Centennial Mountains-Island Park

When
March 30, 10:00 AM MST to March 31, 11:00 PM MST
Where
Centennial Mountains-Island Park forecast zone
Reported by
SNOTEL
Coordinates
44.091, -111.680 (the zone’s center; the record gives no point)

Heavy snow fell above 7500 feet with 16 inches estimated at the White Elephant SNOTEL. Under 4 inches fell at elevations under 6500 feet.

Heavy Snow, Bear River Range

When
March 30, 10:00 AM MST to March 31, 11:00 PM MST
Where
Bear River Range forecast zone
Reported by
SNOTEL
Coordinates
42.412, -111.568 (the zone’s center; the record gives no point)

The Franklin Basin SNOTEL estimated 13 inches of snow with the storm.

Heavy Snow, Frank Church Wilderness

When
March 30, 10:00 AM MST to March 31, 11:00 PM MST
Where
Frank Church Wilderness forecast zone
Reported by
SNOTEL
Coordinates
44.241, -114.282 (the zone’s center; the record gives no point)

The Mill Creek Summit SNOTEL estimated 20 inches of snow fell during the storm.

Heavy Snow, Sawtooth-Stanley Basin

When
March 30, 10:00 AM MST to March 31, 11:00 PM MST
Where
Sawtooth-Stanley Basin forecast zone
Reported by
SNOTEL
Coordinates
43.826, -114.131 (the zone’s center; the record gives no point)

The Mill Creek Summit SNOTEL estimated 28 inches of snowfall during the storm. Nearly 8 inches of snow fell at the Stanley COOP site.

Heavy Snow, Sun Valley Region

When
March 30, 10:00 AM MST to March 31, 11:00 PM MST
Where
Sun Valley Region forecast zone
Reported by
Park/Forest Service
Coordinates
43.826, -114.131 (the zone’s center; the record gives no point)

The forest service reported 13 inches of snow 5 miles west northwest of Galena. SNOTEL snowfall estimates during the storm were the following: Dollarhide Summit 18 inches, Galena 11 inches, Galena Summit 14 inches, and Lost Wood Divide 14 inches.

Heavy Snow, Big Lost Highlands-Copper Basin

When
March 30, 10:00 AM MST to March 31, 11:00 PM MST
Where
Big Lost Highlands-Copper Basin forecast zone
Reported by
SNOTEL
Coordinates
43.792, -113.811 (the zone’s center; the record gives no point)

Twelve inches of snow was estimated at the Bear Canyon SNOTEL with 20 inches at Smiley Mountain.

What these are

Heavy Snow
Snowfall reaching the local warning threshold without the other hazards of a winter storm.

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

The same day elsewhere

More

Every storm in Idaho in 2020Every state in 2020This day in weather historyWarnings in Idaho, March 2020

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 2026-10-01. Each event’s entry at NCEI: 881603, 881608, 881612, 881614, 881615, 881617.