Alert archive / Idaho / Winter Storm Warnings in 2020
Winter Storm Warning 4, NWS Pocatello, ID
NWS Pocatello, ID issued this winter storm warning at Feb 4, 2020, 2:35 PM MST for 5 counties in Idaho. It took effect at Feb 5, 2020, 11:00 AM MST. It was in force for 40 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
- Feb 4, 2020, 2:35 PM MST (21:35 UTC)
- In effect from
- Feb 5, 2020, 11:00 AM MST
- Expired
- Feb 7, 2020, 2:42 AM MST
- In force
- 40 hr
- Issued by
- NWS Pocatello, ID
Counties Bonneville County, ID, Clark County, ID, Fremont County, ID, Madison County, ID, Teton County, ID
The radar
The Pocatello radar (KSFX), 120 km from the middle of the area, began a volume at 21:36 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
Riverton, WY (KRIW), launched 12:00Z, 9.6 hours before the alert went out and 279 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
- 677 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 22 m²/s²
- 0-3 km storm-relative helicity
- 53 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this winter storm warning went out, 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 this winter storm warning went out at Feb 4, 3:14 AM MST, 11 hours 21 minutes earlier.
Area forecast discussion, Feb 4, 3:14 AM MST, 11 hours 21 minutes before
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</html>The office that day
Everything else NWS Pocatello, ID issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 4, 3:28 AM MST | Winter Storm Watch | PIH | Bonneville, Clark, Fremont, Madison, Teton | 11 hr |
| Feb 4, 2:35 PM MST | Winter Weather Advisory | PIH | Bannock, Bear Lake, Bingham, Blaine, Bonneville, Caribou and 10 more | 72 hr |
Nearby
Winter Storm Warnings in Idaho, 2020Every winter storm warning in 2020
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.