Alert archive / Nevada / Mesoscale Discussions in 2003

Mesoscale Discussion 2005

July 27, 20039 counties in Nevada; Harney County, Malheur County, Oregon

The Storm Prediction Center issued this mesoscale discussion at Jul 27, 2003, 3:36 PM PDT for 9 counties in Nevada; Harney County, Malheur County, Oregon. It was in force for 114 min.

The area

The outline as issued.

The facts

Issued
Jul 27, 2003, 3:36 PM PDT (22:36 UTC)
Expired
Jul 27, 2003, 5:30 PM PDT
In force
114 min
Issued by
the Storm Prediction Center

Counties Churchill County, NV, Douglas County, NV, Eureka County, NV, Humboldt County, NV, Lander County, NV, Lyon County, NV, Pershing County, NV, Storey County, NV, Washoe County, NV, Harney County, OR, Malheur County, OR

The nearest sounding before it

Reno, NV (KREV), launched 12:00Z, 10.6 hours before the alert went out and 102 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 2003-07-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 78 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 2003-07-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 30 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
78 J/kg
Mixed-layer CIN
-134 J/kg
Mixed-layer LCL
2353 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
30 m²/s²
0-3 km storm-relative helicity
22 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.

697 
ACUS11 KWNS 272237
SWOMCD
SPC MCD 272236 
NVZ000-IDZ000-ORZ000-CAZ000-280030-

MESOSCALE DISCUSSION 2005
NWS STORM PREDICTION CENTER NORMAN OK
0536 PM CDT SUN JUL 27 2003

AREAS AFFECTED...FAR NERN CA/NWRN NV...FAR SERN ORE/SWRN ID

CONCERNING...SEVERE THUNDERSTORM POTENTIAL 

VALID 272236Z - 280030Z

ISOLATED DAMAGING WINDS/LARGE HAIL WILL BE POSSIBLE WITH DEVELOPING
THUNDERSTORMS OVER THE NRN SIERRA NEVADA/NRN NEVADA INTO FAR SERN
ORE/SWRN ID IN THE NEXT FEW HOURS. OVERALL SEVERE THREAT APPEARS TOO
MINIMAL AT THIS TIME TO WARRANT A SEVERE WW.

WV IMAGERY INDICATED A SHORTWAVE CENTERED OVER THE NRN SACRAMENTO
VALLEY IN CA.  40 KT 8KM WIND SWLY FIELD FROM NERN CA NEWD INTO SERN
ORE/SWRN ID ASSOCIATED WITH THIS SHORTWAVE MAY BE SUFFICIENT FOR
SOME LINEAR ORGANIZATION TO DEVELOPING CONVECTION OVER THE SIERRA
NEVADA...SERN ORE AND FAR SWRN ID. MODERATE INSTABILITY WAS IN PLACE
OVER THE AREA WITH MLCAPE VALUES FROM RECENT MODIFIED FORECAST
SOUNDINGS INDICATING AROUND 1000 J/KG OF MLCAPE. MODEST DOWNDRAFT
CAPE VALUE...DUE IN PART TO HIGH TEMP/DEWPOINT SPREADS WILL AID IN
DAMAGING WINDS BEING THE PRIMARY THREAT. STEEPEST MID LEVEL LAPSE
RATES WILL EXIST OVER THE NRN SIERRA NEVADA/NERN CA WHERE THE
GREATEST THREAT FOR MARGINALLY SEVERE HAIL WILL EXIST.

..CROSBIE.. 07/27/2003

...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...

ATTN...WFO...VEF...BOI...LKN...REV...MFR...

38591963 40292076 43121898 43401709 40841515 38611624

Nearby

Mesoscale Discussions in Nevada, 2003Mesoscale Discussions in Oregon, 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.