Alert archive / California / Mesoscale Discussions in 2003

Mesoscale Discussion 2037

July 31, 200316 counties in California

The Storm Prediction Center issued this mesoscale discussion at Jul 31, 2003, 4:13 PM PDT for 16 counties in California. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Jul 31, 2003, 4:13 PM PDT (23:13 UTC)
Expired
Jul 31, 2003, 6:15 PM PDT
In force
2 hr
Issued by
the Storm Prediction Center

Counties Alpine County, CA, Amador County, CA, Calaveras County, CA, El Dorado County, CA, Fresno County, CA, Kern County, CA, Kings County, CA, Madera County, CA, Mariposa County, CA, Nevada County, CA, Placer County, CA, Plumas County, CA, Sierra County, CA, Tulare County, CA, Tuolumne County, CA, Yuba County, CA

The radar

The Sacramento radar (KDAX), 161 km from the middle of the area, began a volume at 23:14 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, 11.2 hours before the alert went out and 250 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 2003-07-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3 joules per kilogram.LCLLFCEL10008507005003002001001 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, Reno, NV at 12:00Z on 2003-07-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 12 square meters per square second.1939Sfc1 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
3 J/kg
Mixed-layer CIN
-379 J/kg
Mixed-layer LCL
2514 m above ground
0-6 km bulk shear
14 kt
0-1 km storm-relative helicity
12 m²/s²
0-3 km storm-relative helicity
153 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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Nearby

Mesoscale Discussions in California, 2003Every 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.