Alert archive / Nebraska / Mesoscale Discussions in 2004

Mesoscale Discussion 710

May 16, 200435 counties in Nebraska; 6 counties in South Dakota

The Storm Prediction Center issued this mesoscale discussion at May 16, 2004, 6:55 PM CDT for 35 counties in Nebraska; 6 counties in South Dakota. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: May 16, 2004, 6:55 PM CDT (23:55 UTC)
Expired: May 16, 2004, 9:00 PM CDT
In force: 2 hr
Issued by: the Storm Prediction Center

All 41 counties

Adams County, NE, Antelope County, NE, Boone County, NE, Boyd County, NE, Buffalo County, NE, Butler County, NE, Cedar County, NE, Colfax County, NE, Cuming County, NE, Dakota County, NE, Dixon County, NE, Dodge County, NE, Garfield County, NE, Greeley County, NE, Hall County, NE, Hamilton County, NE, Holt County, NE, Howard County, NE, Kearney County, NE, Knox County, NE, Madison County, NE, Merrick County, NE, Nance County, NE, Pierce County, NE, Platte County, NE, Polk County, NE, Saunders County, NE, Seward County, NE, Sherman County, NE, Stanton County, NE, Thurston County, NE, Valley County, NE, Wayne County, NE, Wheeler County, NE, York County, NE, Bon Homme County, SD, Clay County, SD, Lincoln County, SD, Turner County, SD, Union County, SD, Yankton County, SD

The radar

The Grand Island radar (KUEX), 157 km from the middle of the area, began a volume at 23:58 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

Omaha, NE (KOAX), launched 12:00Z, 11.9 hours before the alert went out and 179 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1219 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 49 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.

079 
ACUS11 KWNS 162355
SWOMCD
SPC MCD 162355 
IAZ000-NEZ000-SDZ000-170200-

MESOSCALE DISCUSSION 0710
NWS STORM PREDICTION CENTER NORMAN OK
0655 PM CDT SUN MAY 16 2004

AREAS AFFECTED...CENTRAL/NERN NEB...SERN SD

CONCERNING...TORNADO WATCH 208...

VALID 162355Z - 170200Z

SCATTERED-NUMEROUS TSTMS OVER WRN PORTIONS WW WILL MOVE NEWD WITH
CONTINUING POTENTIAL FOR TORNADIC SUPERCELLS -- WITH WIND/HAIL
DAMAGE POSSIBLE -- AND BOW ECHO EVOLUTION.  SEVERAL TORNADOES AND
ROTATING WALL CLOUDS HAVE BEEN REPORTED PAST HOUR IN HOLT/SHERMAN
COUNTIES FROM SEPARATE SUPERCELLS.

SFC MESOANALYSIS SHOWS FRONTAL-WAVE CYCLONE WITHIN TRIANGLE BOUNDED
BY BBW-LBF-ANW.  EXPECT THIS FEATURE TO SHIFT NEWD ALONG FRONTAL
ZONE TOWARD AREA OF STRONGEST PRESSURE FALLS -- NOW ANALYZED OVER
SERN SD/NWRN IA/SWRN MN.  AS CYCLONE PASSES THROUGH REGION...VERY
FAVORABLE SHEAR PROFILES FOR DISCRETE STORMS TO BECOME TORNADIC
SUPERCELLS WILL PERSIST INVOF WARM FRONT AND IN ADJACENT PORTIONS
WARM SECTOR.  500-900 J/KG 0-3 KM SRH APPEARS IN PROFILER DATA AND
RUC SOUNDINGS...ALONG WITH 50-60 KT SHEAR THROUGH 0-6 KM LAYER. 
MLCAPE ESTIMATED AROUND 1500 J/KG.  50-60 KT LLJ JUST ABOVE SFC WILL
HELP TO MAINTAIN LARGE LOW LEVEL HODOGRAPHS.

..EDWARDS.. 05/16/2004

...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...

ATTN...WFO...FSD...OAX...GID...LBF...

40369926 41329930 42799928 42979926 43469639 40909637

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 16, 1:13 PM CDT	Mesoscale Discussion	SPC	Antelope, Boyd, Brown, Cedar, Dakota, Dixon and 12 more	2 hr
May 16, 3:02 PM CDT	Mesoscale Discussion	SPC	Chase, Dundy, Frontier, Furnas, Gosper, Hayes and 3 more	88 min
May 16, 3:15 PM CDT	Tornado Watch	SPC	Arthur, Buffalo, Chase, Custer, Dawson, Dundy and 14 more	7 hr
May 16, 4:45 PM CDT	Tornado Watch	SPC	Adams, Antelope, Boone, Boyd, Buffalo, Butler and 29 more	5 hr
May 16, 6:04 PM CDT	Mesoscale Discussion	SPC	Buffalo, Custer, Dawson, Frontier, Furnas, Gosper and 9 more	86 min
May 16, 6:45 PM CDT	Severe Thunderstorm Watch	SPC	Adams, Clay, Fillmore, Franklin, Gage, Jefferson and 6 more	4 hr

Nearby

Mesoscale Discussions in Nebraska, 2004 Mesoscale Discussions in South Dakota, 2004 Every mesoscale discussion in 2004

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.