Alert archive / Nebraska / Severe Thunderstorm Watches in 2000

Severe Thunderstorm Watch 417

June 4, 200015 counties in Iowa; 19 counties in Nebraska; 9 counties in South Dakota

The Storm Prediction Center issued this severe thunderstorm watch at Jun 4, 2000, 12:15 AM CDT for 15 counties in Iowa; 19 counties in Nebraska; 9 counties in South Dakota. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued: Jun 4, 2000, 12:15 AM CDT (05:15 UTC)
Expired: Jun 4, 2000, 6:00 AM CDT
In force: 6 hr
Issued by: the Storm Prediction Center

All 43 counties

Adair County, IA, Audubon County, IA, Cass County, IA, Cherokee County, IA, Crawford County, IA, Harrison County, IA, Ida County, IA, Lyon County, IA, Monona County, IA, O'Brien County, IA, Plymouth County, IA, Pottawattamie County, IA, Shelby County, IA, Sioux County, IA, Woodbury County, IA, Antelope County, NE, Burt County, NE, Butler County, NE, Cedar County, NE, Colfax County, NE, Cuming County, NE, Dakota County, NE, Dixon County, NE, Dodge County, NE, Douglas County, NE, Knox County, NE, Madison County, NE, Pierce County, NE, Platte County, NE, Saunders County, NE, Stanton County, NE, Thurston County, NE, Washington County, NE, Wayne County, NE, Bon Homme County, SD, Charles Mix County, SD, Clay County, SD, Douglas County, SD, Hutchinson County, SD, Lincoln County, SD, Turner County, SD, Union County, SD, Yankton County, SD

The radar

The Sioux Falls radar (KFSD), 118 km from the middle of the area, began a volume at 05:17 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.

Warnings issued inside it

9 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

Issued	Product	Office	Counties	Lasted
Jun 4, 12:26 AM CDT	Severe Thunderstorm Warning	FSD	Davison, Hutchinson	34 min
Jun 4, 12:56 AM CDT	Severe Thunderstorm Warning	FSD	Bon Homme, Yankton	34 min
Jun 4, 12:59 AM CDT	Severe Thunderstorm Warning	FSD	Clay, Lincoln, Union	31 min
Jun 4, 1:27 AM CDT	Tornado Warning	FSD	Yankton	18 min
Jun 4, 1:32 AM CDT	Severe Thunderstorm Warning	OAX	Cedar	43 min
Jun 4, 1:40 AM CDT	Severe Thunderstorm Warning	FSD	Clay	35 min
Jun 4, 2:02 AM CDT	Severe Thunderstorm Warning	FSD	Plymouth	28 min
Jun 4, 2:07 AM CDT	Severe Thunderstorm Warning	FSD	Dixon	23 min
Jun 4, 2:29 AM CDT	Severe Thunderstorm Warning	FSD	Woodbury	31 min

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 5.3 hours before the alert went out and 151 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: 2210 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 85 m²/s²
0-3 km storm-relative helicity: 362 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.

155 
WWUS9 KMKC 040445
SEL7  

SEL7  
MKC WW 040445
IAZ000-NEZ000-SDZ000-041100-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 417
STORM PREDICTION CENTER NORMAN OK
1145 PM CDT SAT JUN 3 2000

THE STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

   WESTERN IOWA                               
   EASTERN NEBRASKA                           
   SOUTHEASTERN SOUTH DAKOTA                       

EFFECTIVE THIS SUNDAY MORNING FROM 1215 AM UNTIL 600 AM CDT.

HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 80
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE SEVERE THUNDERSTORM WATCH AREA IS ALONG AND 80 STATUTE MILES
EAST AND WEST OF A LINE FROM 40 MILES NORTH OF YANKTON SOUTH DAKOTA
TO 10 MILES SOUTH OF OMAHA NEBRASKA.

REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA. 
PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING
WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE
WARNINGS.

OTHER WATCH INFORMATION...THIS SEVERE THUNDERSTORM WATCH REPLACES
SEVERE THUNDERSTORM WATCH NUMBER 416.  WATCH NUMBER 416 WILL NOT BE
IN EFFECT AFTER 15 AM CDT.  CONTINUE...WW 415...

DISCUSSION...STRONG/SEVERE THUNDERSTORMS CONTINUE TO MOVE SEWD THRU
ERN NEB/WRN IA...WHILE NEW SEVERE STORMS HAVE DEVELOPED AHEAD OF
S/WV TROUGH INTO SERN SD.  THESE STORMS EXPECTED TO INCREASE IN
FAVORABLE SHEAR ENVIRONMENT WITH LLJ ACROSS NEB CONTINUING TO
INCREASE LOW LEVEL MOISTURE AND INSTABILITY INTO AREA.

STORMS WILL MOVE SEWD ACROSS ERN NEB INTO WRN IA ALONG AND N OF
BOUNDARY FROM CURRENT ACTIVITY IN NEB/IA.


AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 2 INCHES.  EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 70
KNOTS.  A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500.  MEAN STORM
MOTION VECTOR 32035.


...HALES

432,0954 410,0942 410,0972 432,0985

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 3, 8:45 PM CDT	Severe Thunderstorm Watch	SPC	Monona, Woodbury	5 hr

Nearby

Severe Thunderstorm Watches in Nebraska, 2000 Severe Thunderstorm Watches in Iowa, 2000 Severe Thunderstorm Watches in South Dakota, 2000 Every severe thunderstorm watch in 2000

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.