Alert archive / Colorado / Mesoscale Discussions in 2011

Mesoscale Discussion 1999

August 17, 2011Baca County, Prowers County, Colorado

The Storm Prediction Center issued this mesoscale discussion at Aug 17, 2011, 9:17 PM MDT for Baca County, Prowers County, Colorado. It was in force for 58 min.

The area

The outline as issued.

The facts

Issued
Aug 17, 2011, 9:17 PM MDT (03:17 UTC)
Expired
Aug 17, 2011, 10:15 PM MDT
In force
58 min
Issued by
the Storm Prediction Center

Counties Baca County, CO, Prowers County, CO

The radar

The Pueblo radar (KPUX), 184 km from the middle of the area, began a volume at 03:18 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 00:00Z, 3.3 hours before the alert went out and 270 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 00:00Z on 2011-08-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 6 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, Denver, CO at 00:00Z on 2011-08-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -4 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
6 J/kg
Mixed-layer CIN
-104 J/kg
Mixed-layer LCL
4056 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
-4 m²/s²
0-3 km storm-relative helicity
59 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
Aug 17, 6:19 PM MDTMesoscale DiscussionSPCBaca, Bent, Crowley, Kiowa, Otero, Prowers56 min
Aug 17, 6:37 PM MDTSevere Thunderstorm WatchSPCBaca, Bent, Kiowa, Las Animas, Otero, Prowers3 hr

Nearby

Mesoscale Discussions in Colorado, 2011Every mesoscale discussion in 2011

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.