Alert archive / Idaho / Mesoscale Discussions in 2011

Mesoscale Discussion 1632

July 16, 20114 states

The Storm Prediction Center issued this mesoscale discussion at Jul 16, 2011, 2:04 PM MDT for 4 states. It was in force for 56 min.

The area

The outline as issued.

The facts

Issued: Jul 16, 2011, 2:04 PM MDT (20:04 UTC)
Expired: Jul 16, 2011, 3:00 PM MDT
In force: 56 min
Issued by: the Storm Prediction Center

All 28 counties

Adams County, ID, Boise County, ID, Clearwater County, ID, Custer County, ID, Gem County, ID, Idaho County, ID, Lemhi County, ID, Lewis County, ID, Nez Perce County, ID, Payette County, ID, Valley County, ID, Washington County, ID, Beaverhead County, MT, Broadwater County, MT, Deer Lodge County, MT, Gallatin County, MT, Granite County, MT, Jefferson County, MT, Madison County, MT, Mineral County, MT, Missoula County, MT, Powell County, MT, Ravalli County, MT, Silver Bow County, MT, Baker County, OR, Union County, OR, Wallowa County, OR, Asotin County, WA

The radar

The Missoula radar (KMSX), 154 km from the middle of the area, began a volume at 20:05 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

Spokane, WA (KOTX), launched 12:00Z, 8.1 hours before the alert went out and 275 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1801 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 51 m²/s²
0-3 km storm-relative helicity: 104 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 15, 6:26 PM MDT	Mesoscale Discussion	SPC	Big Horn, Carbon, Custer, Dawson, Fallon, Garfield and 12 more	64 min
Jul 16, 4:14 PM MDT	Mesoscale Discussion	SPC	Blaine, Cascade, Chouteau, Dawson, Fergus, Garfield and 11 more	61 min

Nearby

Mesoscale Discussions in Idaho, 2011 Mesoscale Discussions in Montana, 2011 Mesoscale Discussions in Oregon, 2011 Every mesoscale discussion in 2011

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.