Alert archive / Nebraska / Severe Thunderstorm Watches in 2000

Severe Thunderstorm Watch 488

June 23, 200012 counties in Nebraska

The Storm Prediction Center issued this severe thunderstorm watch at Jun 23, 2000, 9:00 PM CDT for 12 counties in Nebraska. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued: Jun 23, 2000, 9:00 PM CDT (02:00 UTC)
Expired: Jun 24, 2000, 2:00 AM CDT
In force: 5 hr
Issued by: the Storm Prediction Center

Counties Blaine County, NE, Brown County, NE, Cherry County, NE, Custer County, NE, Hooker County, NE, Keya Paha County, NE, Lincoln County, NE, Logan County, NE, Loup County, NE, McPherson County, NE, Rock County, NE, Thomas County, NE

Warnings issued inside it

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

Issued	Product	Office	Counties	Lasted
Jun 23, 9:14 PM CDT	Severe Thunderstorm Warning	LBF	Cherry	46 min
Jun 23, 11:13 PM CDT	Severe Thunderstorm Warning	LBF	Custer	62 min

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 2.0 hours before the alert went out and 73 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: 1315 J/kg
Mixed-layer CIN: -180 J/kg
Mixed-layer LCL: 2212 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 91 m²/s²
0-3 km storm-relative helicity: 116 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.5

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

782 
WWUS9 KMKC 240129
SEL8  

SEL8  
MKC WW 240124
NEZ000-240700-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 488
STORM PREDICTION CENTER NORMAN OK
724 PM MDT FRI JUN 23 2000

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

   CENTRAL NEBRASKA                           

EFFECTIVE THIS FRIDAY NIGHT AND SATURDAY MORNING FROM 800 PM UNTIL
100 AM MDT.

HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE SEVERE THUNDERSTORM WATCH AREA IS ALONG AND 60 STATUTE MILES
EAST AND WEST OF A LINE FROM 15 MILES SOUTHEAST OF NORTH PLATTE
NEBRASKA TO 10 MILES NORTH NORTHEAST OF VALENTINE 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...  CONTINUE...WW 484...WW 485...WW
486...WW 487...

DISCUSSION...SEVERE THUNDERSTORMS OVER PARTS OF THE NEB PANHANDLE
ARE SPREADING SEWD...WITH NEW CELLS NOW DEVELOPING EWD INTO CHERRY
COUNTY NEB.  00Z LBF SOUNDING SHOWS STEEP LAPSE RATES AND VERY
UNSTABLE AIR MASS WITH SBCAPE ABOVE 3500 J/KG.  STRONGER WESTERLY
FLOW ALOFT JUST ABOVE 500 MB IS CREATING SUFFICIENT VERTICAL SHEAR
TO MAINTAIN THREAT OF SEVERE THUNDERSTORMS.


AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 2 INCHES.  EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
KNOTS.  A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 450.  MEAN STORM
MOTION VECTOR 28025.


...WEISS

425,0991 405,0991 405,1013 425,1013

Nearby

Severe Thunderstorm Watches in Nebraska, 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.