Alert archive / Wyoming / Mesoscale Discussions in 2008

Mesoscale Discussion 1665

July 2, 200813 counties in Wyoming

The Storm Prediction Center issued this mesoscale discussion at Jul 2, 2008, 12:34 PM MDT for 13 counties in Wyoming. It was in force for 116 min.

The area

The outline as issued.

The facts

Issued
Jul 2, 2008, 12:34 PM MDT (18:34 UTC)
Expired
Jul 2, 2008, 2:30 PM MDT
In force
116 min
Issued by
the Storm Prediction Center

Counties Albany County, WY, Campbell County, WY, Converse County, WY, Crook County, WY, Goshen County, WY, Johnson County, WY, Laramie County, WY, Natrona County, WY, Niobrara County, WY, Platte County, WY, Sheridan County, WY, Washakie County, WY, Weston County, WY

The watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

The nearest sounding before it

Denver, CO (KDNR), launched 12:00Z, 6.6 hours before the alert went out and 411 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, Denver, CO at 12:00Z on 2008-07-02Temperature 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 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Denver, CO at 12:00Z on 2008-07-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -61 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2576 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
-61 m²/s²
0-3 km storm-relative helicity
28 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 1, 6:02 PM MDTMesoscale DiscussionSPCJohnson, Sheridan118 min
Jul 1, 9:24 PM MDTMesoscale DiscussionSPCCrook, Sheridan66 min
Jul 2, 1:27 PM MDTSevere Thunderstorm WatchSPCBig Horn, Campbell, Converse, Fremont, Goshen, Hot Springs and 8 more8 hr
Jul 2, 4:57 PM MDTMesoscale DiscussionSPCBig Horn, Campbell, Converse, Goshen, Hot Springs, Johnson and 7 more63 min

Nearby

Mesoscale Discussions in Wyoming, 2008Every mesoscale discussion in 2008

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.