Alert archive / Nevada / Mesoscale Discussions in 2009

Mesoscale Discussion 938

June 3, 20096 counties in California; 6 counties in Nevada; Lake County, Oregon

The Storm Prediction Center issued this mesoscale discussion at Jun 3, 2009, 12:35 PM PDT for 6 counties in California; 6 counties in Nevada; Lake County, Oregon. It was in force for 85 min.

The area

The outline as issued.

The facts

Issued
Jun 3, 2009, 12:35 PM PDT (19:35 UTC)
Expired
Jun 3, 2009, 2:00 PM PDT
In force
85 min
Issued by
the Storm Prediction Center

Counties Alpine County, CA, Lassen County, CA, Modoc County, CA, Mono County, CA, Plumas County, CA, Sierra County, CA, Churchill County, NV, Douglas County, NV, Lyon County, NV, Pershing County, NV, Storey County, NV, Washoe County, NV, Lake County, OR

The radar

The Reno radar (KRGX), 77 km from the middle of the area, began a volume at 19:37 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

Reno, NV (KREV), launched 12:00Z, 7.6 hours before the alert went out and 180 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, Reno, NV at 12:00Z on 2009-06-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 147 joules per kilogram.LCLLFCEL10008507005003002001001 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, Reno, NV at 12:00Z on 2009-06-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 80 square meters per square second.19395878Sfc1 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
147 J/kg
Mixed-layer CIN
-58 J/kg
Mixed-layer LCL
905 m above ground
0-6 km bulk shear
52 kt
0-1 km storm-relative helicity
80 m²/s²
0-3 km storm-relative helicity
243 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.4

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.

IssuedProductOfficeCountiesLasted
Jun 3, 4:44 PM PDTMesoscale DiscussionSPCDel Norte, Glenn, Shasta, Siskiyou, Tehama, Trinity91 min

Nearby

Mesoscale Discussions in Nevada, 2009Mesoscale Discussions in California, 2009Mesoscale Discussions in Oregon, 2009Every mesoscale discussion in 2009

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.