Alert archive / Nebraska / Mesoscale Discussions in 2005

Mesoscale Discussion 900

May 17, 20054 counties in Kansas; 11 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at May 17, 2005, 10:40 PM CDT for 4 counties in Kansas; 11 counties in Nebraska. It was in force for 65 min.

The area

The outline as issued.

The facts

Issued: May 17, 2005, 10:40 PM CDT (03:40 UTC)
Expired: May 17, 2005, 11:45 PM CDT
In force: 65 min
Issued by: the Storm Prediction Center

Counties Jewell County, KS, Phillips County, KS, Rooks County, KS, Smith County, KS, Adams County, NE, Clay County, NE, Fillmore County, NE, Franklin County, NE, Hamilton County, NE, Merrick County, NE, Nuckolls County, NE, Polk County, NE, Thayer County, NE, Webster County, NE, York County, NE

The radar

The Grand Island radar (KUEX), 22 km from the middle of the area, began a volume at 03:39 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

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 3.7 hours before the alert went out and 195 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: 310 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2505 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: -278 m²/s²
0-3 km storm-relative helicity: -13 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.3

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
May 18, 1:50 PM CDT	Mesoscale Discussion	SPC	Allen, Anderson, Barber, Bourbon, Butler, Chase and 27 more	115 min
May 18, 2:40 PM CDT	Severe Thunderstorm Watch	SPC	Allen, Anderson, Butler, Chase, Chautauqua, Coffey and 31 more	7 hr
May 17, 8:19 PM CDT	Mesoscale Discussion	SPC	Adams, Antelope, Boone, Boyd, Buffalo, Cedar and 14 more	116 min
May 18, 12:58 AM CDT	Mesoscale Discussion	SPC	Burt, Cuming, Dakota, Dodge, Thurston, Washington	62 min

Nearby

Mesoscale Discussions in Nebraska, 2005 Mesoscale Discussions in Kansas, 2005 Every mesoscale discussion in 2005

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.