Alert archive / Colorado / Mesoscale Discussions in 2003

Mesoscale Discussion 664

May 1, 200314 counties in Colorado; 4 counties in Kansas; Dundy County, Kimball County, Nebraska

The Storm Prediction Center issued this mesoscale discussion at May 1, 2003, 11:58 AM MDT for 14 counties in Colorado; 4 counties in Kansas; Dundy County, Kimball County, Nebraska. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: May 1, 2003, 11:58 AM MDT (17:58 UTC)
Expired: May 1, 2003, 2:00 PM MDT
In force: 2 hr
Issued by: the Storm Prediction Center

Counties Adams County, CO, Arapahoe County, CO, Broomfield County, CO, Cheyenne County, CO, Denver County, CO, Elbert County, CO, Kit Carson County, CO, Lincoln County, CO, Logan County, CO, Morgan County, CO, Phillips County, CO, Washington County, CO, Weld County, CO, Yuma County, CO, Cheyenne County, KS, Rawlins County, KS, Sherman County, KS, Wallace County, KS, Dundy County, NE, Kimball County, NE

The radar

The Denver radar (KFTG), 75 km from the middle of the area, began a volume at 18:00 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

Denver, CO (KDNR), launched 12:00Z, 6.0 hours before the alert went out and 39 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 101 J/kg
Mixed-layer CIN: -97 J/kg
Mixed-layer LCL: 1096 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 101 m²/s²
0-3 km storm-relative helicity: 125 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

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.

Issued	Product	Office	Counties	Lasted
Apr 30, 6:30 PM MDT	Severe Thunderstorm Watch	SPC	Allen, Anderson, Atchison, Butler, Chase, Chautauqua and 23 more	6 hr
Apr 30, 6:31 PM MDT	Mesoscale Discussion	SPC	Doniphan, Johnson, Leavenworth, Wyandotte	119 min
Apr 30, 8:22 PM MDT	Mesoscale Discussion	SPC	Bourbon, Crawford, Linn, Miami	83 min
Apr 30, 8:30 PM MDT	Severe Thunderstorm Watch	SPC	Bourbon, Cherokee, Crawford, Johnson, Leavenworth, Linn and 2 more	6 hr
Apr 30, 8:52 PM MDT	Mesoscale Discussion	SPC	Allen, Anderson, Atchison, Butler, Chase, Chautauqua and 23 more	83 min
Apr 30, 9:31 PM MDT	Mesoscale Discussion	SPC	Doniphan, Johnson, Leavenworth, Wyandotte	89 min
Apr 30, 10:47 PM MDT	Mesoscale Discussion	SPC	Allen, Anderson, Butler, Chase, Chautauqua, Coffey and 13 more	118 min
Apr 30, 11:00 PM MDT	Mesoscale Discussion	SPC	Bourbon, Cherokee, Crawford, Johnson, Leavenworth, Linn and 2 more	90 min
Apr 30, 11:10 PM MDT	Severe Thunderstorm Watch	SPC	Allen, Anderson, Bourbon, Butler, Chase, Chautauqua and 22 more	5 hr
May 1, 1:27 AM MDT	Mesoscale Discussion	SPC	Allen, Anderson, Bourbon, Chautauqua, Cherokee, Coffey and 10 more	2 hr

Nearby

Mesoscale Discussions in Colorado, 2003 Mesoscale Discussions in Kansas, 2003 Mesoscale Discussions in Nebraska, 2003 Every 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.