Alert archive / Idaho / Winter Storm Warnings in 2015
Winter Storm Warning 5, NWS Boise, ID
NWS Boise, ID issued this winter storm warning at Dec 20, 2015, 3:13 PM MST for 8 counties in Idaho. It took effect at Dec 21, 2015, 5:15 AM MST. It was in force for 10 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
- Dec 20, 2015, 3:13 PM MST (22:13 UTC)
- In effect from
- Dec 21, 2015, 5:15 AM MST
- Expired
- Dec 21, 2015, 3:04 PM MST
- In force
- 10 hr
- Issued by
- NWS Boise, ID
Counties Adams County, ID, Boise County, ID, Camas County, ID, Elmore County, ID, Gem County, ID, Owyhee County, ID, Valley County, ID, Washington County, ID
The radar
The Boise radar (KCBX), 57 km from the middle of the area, began a volume at 22:14 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
Elko, NV (KLKN), launched 12:00Z, 10.2 hours before the alert went out and 370 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
- 638 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 53 m²/s²
- 0-3 km storm-relative helicity
- 88 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 Boise, ID wrote its last area forecast discussion before this winter storm warning went out at Dec 20, 3:03 PM MST, 10 minutes earlier.
Area forecast discussion, Dec 20, 3:03 PM MST, 10 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 |
|---|---|---|---|---|
| Dec 19, 7:55 PM MST | Dense Fog Advisory | BOI | Ada, Adams, Canyon, Elmore, Gem, Gooding and 5 more | 15 hr |
| Dec 20, 2:48 AM MST | Winter Weather Advisory | BOI | Adams, Boise, Camas, Elmore, Gem, Owyhee and 3 more | 4 days |
Nearby
Winter Storm Warnings in Idaho, 2015Every winter storm warning in 2015
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.