Alert archive / Idaho / Winter Storm Warnings in 2023

Winter Storm Warning 4, NWS Pocatello, ID

February 17, 2023Bonneville County, Madison County, Teton County, Idaho

NWS Pocatello, ID issued this winter storm warning at Feb 17, 2023, 12:49 PM MST for Bonneville County, Madison County, Teton County, Idaho. It took effect at Feb 18, 2023, 11:00 AM MST. It was in force for 17 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 17, 2023, 12:49 PM MST (19:49 UTC)
In effect from
Feb 18, 2023, 11:00 AM MST
Expired
Feb 19, 2023, 3:35 AM MST
In force
17 hr
Issued by
NWS Pocatello, ID

Counties Bonneville County, ID, Madison County, ID, Teton County, ID

The radar

The Pocatello radar (KSFX), 113 km from the middle of the area, began a volume at 19:49 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, 7.8 hours before the alert went out and 258 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.

Skew-T log-pSkew-T log-p diagram, Riverton, WY at 12:00Z on 2023-02-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Riverton, WY at 12:00Z on 2023-02-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 60 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1923 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
60 m²/s²
0-3 km storm-relative helicity
93 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

Everything else NWS Pocatello, ID issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Feb 17, 12:49 PM MSTWinter Weather AdvisoryPIHBannock, Bear Lake, Bingham, Bonneville, Caribou, Clark and 6 more39 hr

Nearby

Winter Storm Warnings in Idaho, 2023Every winter storm warning in 2023

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.