Alert archive / Oregon / Mesoscale Discussions in 2014

Mesoscale Discussion 1434

July 22, 20144 counties in California; Lyon County, Storey County, Washoe County, Nevada; 7 counties in Oregon

The Storm Prediction Center issued this mesoscale discussion at Jul 22, 2014, 4:45 PM PDT for 4 counties in California; Lyon County, Storey County, Washoe County, Nevada; 7 counties in Oregon. It was in force for 3 hr.

The area

The outline as issued.

The facts

Issued
Jul 22, 2014, 4:45 PM PDT (23:45 UTC)
Expired
Jul 22, 2014, 7:15 PM PDT
In force
3 hr
Issued by
the Storm Prediction Center
Chance of a watch
20%

Counties Lassen County, CA, Modoc County, CA, Siskiyou County, CA, Trinity County, CA, Lyon County, NV, Storey County, NV, Washoe County, NV, Crook County, OR, Deschutes County, OR, Grant County, OR, Harney County, OR, Jackson County, OR, Klamath County, OR, Lake County, OR

The radar

The Medford radar (KMAX), 151 km from the middle of the area, began a volume at 23:48 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

Medford/Jackson, OR (KMFR), launched 12:00Z, 11.8 hours before the alert went out and 169 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, Medford/Jackson, OR at 12:00Z on 2014-07-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Medford/Jackson, OR at 12:00Z on 2014-07-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 56 square meters per square second.193958Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2115 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
56 m²/s²
0-3 km storm-relative helicity
213 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.

IssuedProductOfficeCountiesLasted
Jul 22, 1:23 PM PDTMesoscale DiscussionSPCCrook, Gilliam, Grant, Jefferson, Morrow, Umatilla and 4 more97 min

Nearby

Mesoscale Discussions in Oregon, 2014Mesoscale Discussions in California, 2014Mesoscale Discussions in Nevada, 2014Every mesoscale discussion in 2014

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.