Alert archive / Colorado / Mesoscale Discussions in 2009

Mesoscale Discussion 975

June 7, 200915 counties in Colorado; 4 counties in Kansas; Chase County, Dundy County, Nebraska

The Storm Prediction Center issued this mesoscale discussion at Jun 7, 2009, 2:30 PM MDT for 15 counties in Colorado; 4 counties in Kansas; Chase County, Dundy County, Nebraska. It was in force for 60 min.

The area

The outline as issued.

The facts

Issued
Jun 7, 2009, 2:30 PM MDT (20:30 UTC)
Expired
Jun 7, 2009, 3:30 PM MDT
In force
60 min
Issued by
the Storm Prediction Center
All 21 counties

Adams County, CO, Arapahoe County, CO, Broomfield County, CO, Denver County, CO, Douglas County, CO, Elbert County, CO, Jefferson County, CO, Kit Carson County, CO, Logan County, CO, Morgan County, CO, Phillips County, CO, Sedgwick County, CO, Washington County, CO, Weld County, CO, Yuma County, CO, Cheyenne County, KS, Sherman County, KS, Thomas County, KS, Wallace County, KS, Chase County, NE, Dundy County, NE

The radar

The Goodland radar (KGLD), 118 km from the middle of the area, began a volume at 20:33 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 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, 8.5 hours before the alert went out and 30 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 2009-06-07Temperature 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 2009-06-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -4 square meters per square second.1939587897Sfc1 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
2464 m above ground
0-6 km bulk shear
59 kt
0-1 km storm-relative helicity
-4 m²/s²
0-3 km storm-relative helicity
23 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
Jun 7, 12:35 AM MDTMesoscale DiscussionSPCLogan, Phillips, Sedgwick55 min
Jun 7, 10:44 AM MDTMesoscale DiscussionSPCAdams, Arapahoe, Boulder, Broomfield, Denver, Gilpin and 4 more61 min
Jun 7, 11:02 AM MDTSevere Thunderstorm WatchSPCAdams, Arapahoe, Boulder, Broomfield, Denver, Douglas and 8 more6 hr
Jun 7, 4:31 PM MDTSevere Thunderstorm WatchSPCKit Carson, Yuma5 hr
Jun 6, 8:01 PM MDTSevere Thunderstorm WatchSPCBarton, Brown, Clay, Cloud, Dickinson, Ellsworth and 23 more6 hr
Jun 6, 10:04 PM MDTMesoscale DiscussionSPCBarton, Brown, Clay, Cloud, Dickinson, Ellsworth and 23 more86 min
Jun 6, 10:16 PM MDTSevere Thunderstorm WatchSPCAtchison, Doniphan, Leavenworth, Wyandotte6 hr
Jun 6, 11:44 PM MDTMesoscale DiscussionSPCAtchison, Brown, Doniphan, Douglas, Jackson, Jefferson and 7 more61 min
Jun 7, 3:45 AM MDTMesoscale DiscussionSPCAtchison, Brown, Clay, Dickinson, Doniphan, Geary and 10 more30 min
Jun 7, 1:36 PM MDTMesoscale DiscussionSPCAtchison, Brown, Doniphan, Douglas, Franklin, Geary and 12 more114 min
Jun 7, 2:45 PM MDTTornado WatchSPCAtchison, Brown, Doniphan, Douglas, Geary, Jackson and 14 more7 hr
Jun 7, 3:13 PM MDTMesoscale DiscussionSPCBarber, Barton, Comanche, Edwards, Ellsworth, Harper and 10 more62 min
Jun 7, 4:07 PM MDTSevere Thunderstorm WatchSPCAllen, Anderson, Barber, Barton, Butler, Chase and 39 more7 hr
Jun 7, 4:44 PM MDTTornado WatchSPCLinn, Miami6 hr
Jun 6, 8:28 PM MDTMesoscale DiscussionSPCAdams, Arthur, Blaine, Brown, Buffalo, Chase and 32 more92 min
Jun 7, 10:16 AM MDTMesoscale DiscussionSPCAntelope, Boyd, Burt, Cedar, Cuming, Dakota and 12 more119 min
Jun 7, 1:31 PM MDTMesoscale DiscussionSPCBanner, Cheyenne, Deuel, Garden, Kimball, Morrill59 min

Nearby

Mesoscale Discussions in Colorado, 2009Mesoscale Discussions in Kansas, 2009Mesoscale Discussions in Nebraska, 2009Every mesoscale discussion in 2009

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.