Alert archive / Idaho / Mesoscale Discussions in 2003

Mesoscale Discussion 1980

July 25, 200315 counties in Idaho; 5 counties in Nevada; Harney County, Lake County, Malheur County, Oregon

The Storm Prediction Center issued this mesoscale discussion at Jul 25, 2003, 1:31 PM MDT for 15 counties in Idaho; 5 counties in Nevada; Harney County, Lake County, Malheur County, Oregon. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Jul 25, 2003, 1:31 PM MDT (19:31 UTC)
Expired: Jul 25, 2003, 4:00 PM MDT
In force: 2 hr
Issued by: the Storm Prediction Center

All 23 counties

Ada County, ID, Blaine County, ID, Boise County, ID, Camas County, ID, Canyon County, ID, Cassia County, ID, Elmore County, ID, Gem County, ID, Gooding County, ID, Jerome County, ID, Lincoln County, ID, Minidoka County, ID, Owyhee County, ID, Payette County, ID, Twin Falls County, ID, Elko County, NV, Eureka County, NV, Humboldt County, NV, Lander County, NV, Pershing County, NV, Harney County, OR, Lake County, OR, Malheur County, OR

The radar

The Boise radar (KCBX), 138 km from the middle of the area, began a volume at 19:32 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

Boise Airport, ID (KBOI), launched 12:00Z, 7.5 hours before the alert went out and 146 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: 1 J/kg
Mixed-layer CIN: -221 J/kg
Mixed-layer LCL: 1274 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 6 m²/s²
0-3 km storm-relative helicity: 50 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 25, 10:55 AM MDT	Mesoscale Discussion	SPC	Clark	3 hr

Nearby

Mesoscale Discussions in Idaho, 2003 Mesoscale Discussions in Nevada, 2003 Mesoscale Discussions in Oregon, 2003 Every mesoscale discussion in 2003

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.