Alert archive / Idaho / Mesoscale Discussions in 2005

Mesoscale Discussion 891

May 16, 200512 counties in Idaho; Lincoln County, Wyoming

The Storm Prediction Center issued this mesoscale discussion at May 16, 2005, 3:47 PM MDT for 12 counties in Idaho; Lincoln County, Wyoming. It was in force for 88 min.

The area

The outline as issued.

The facts

Issued: May 16, 2005, 3:47 PM MDT (21:47 UTC)
Expired: May 16, 2005, 5:15 PM MDT
In force: 88 min
Issued by: the Storm Prediction Center

Counties Bannock County, ID, Bear Lake County, ID, Bingham County, ID, Bonneville County, ID, Butte County, ID, Caribou County, ID, Clark County, ID, Fremont County, ID, Jefferson County, ID, Madison County, ID, Power County, ID, Teton County, ID, Lincoln County, WY

The radar

The Pocatello radar (KSFX), 101 km from the middle of the area, began a volume at 21:49 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

Severe Thunderstorm Watch 282May 16, 4:10 PM MDT

The nearest sounding before it

Salt Lake City I, UT (KSLC), launched 12:00Z, 9.8 hours before the alert went out and 261 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: 2032 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 196 m²/s²
0-3 km storm-relative helicity: 250 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
May 16, 12:29 PM MDT	Mesoscale Discussion	SPC	Bannock, Cassia, Franklin, Jerome, Oneida, Power and 1 more	3 hr
May 16, 4:10 PM MDT	Severe Thunderstorm Watch	SPC	Bannock, Bear Lake, Bingham, Bonneville, Butte, Caribou and 8 more	6 hr

Nearby

Mesoscale Discussions in Idaho, 2005 Mesoscale Discussions in Wyoming, 2005 Every mesoscale discussion in 2005

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.