Alert archive / Nebraska / Severe Thunderstorm Watches in 2000

Severe Thunderstorm Watch 430

June 12, 20005 counties in Colorado; 6 counties in Kansas; 16 counties in Nebraska

The Storm Prediction Center issued this severe thunderstorm watch at Jun 12, 2000, 3:00 PM MDT for 5 counties in Colorado; 6 counties in Kansas; 16 counties in Nebraska. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued: Jun 12, 2000, 3:00 PM MDT (21:00 UTC)
Expired: Jun 12, 2000, 9:00 PM MDT
In force: 6 hr
Issued by: the Storm Prediction Center

All 27 counties

Cheyenne County, CO, Kit Carson County, CO, Phillips County, CO, Sedgwick County, CO, Yuma County, CO, Cheyenne County, KS, Logan County, KS, Rawlins County, KS, Sherman County, KS, Thomas County, KS, Wallace County, KS, Arthur County, NE, Chase County, NE, Cherry County, NE, Deuel County, NE, Dundy County, NE, Garden County, NE, Grant County, NE, Hayes County, NE, Hitchcock County, NE, Hooker County, NE, Keith County, NE, Lincoln County, NE, McPherson County, NE, Perkins County, NE, Sheridan County, NE, Thomas County, NE

The radar

The Goodland radar (KGLD), 121 km from the middle of the area, began a volume at 21:01 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

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

Issued	Product	Office	Counties	Lasted
Jun 12, 4:21 PM MDT	Severe Thunderstorm Warning	GLD	Sherman	59 min
Jun 12, 4:49 PM MDT	Severe Thunderstorm Warning	GLD	Logan	31 min
Jun 12, 4:49 PM MDT	Severe Thunderstorm Warning	LBF	Cherry, Grant	56 min
Jun 12, 4:54 PM MDT	Severe Thunderstorm Warning	GLD	Sheridan, Thomas	46 min
Jun 12, 4:55 PM MDT	Severe Thunderstorm Warning	LBF	Hooker	50 min
Jun 12, 5:00 PM MDT	Severe Thunderstorm Warning	GLD	Cheyenne	45 min
Jun 12, 5:35 PM MDT	Severe Thunderstorm Warning	GLD	Rawlins	45 min
Jun 12, 5:42 PM MDT	Severe Thunderstorm Warning	LBF	Cherry	63 min
Jun 12, 6:12 PM MDT	Severe Thunderstorm Warning	LBF	Hooker, McPherson	63 min
Jun 12, 6:24 PM MDT	Severe Thunderstorm Warning	GLD	Rawlins	31 min
Jun 12, 6:54 PM MDT	Severe Thunderstorm Warning	GLD	Rawlins	31 min
Jun 12, 7:51 PM MDT	Severe Thunderstorm Warning	GLD	Hitchcock	44 min
Jun 12, 7:57 PM MDT	Severe Thunderstorm Warning	LBF	Lincoln	33 min
Jun 12, 8:00 PM MDT	Severe Thunderstorm Warning	LBF	Hayes	45 min
Jun 12, 8:31 PM MDT	Severe Thunderstorm Warning	LBF	Lincoln	44 min

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 12:00Z, 9.0 hours before the alert went out and 131 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: 25 J/kg
Mixed-layer CIN: -573 J/kg
Mixed-layer LCL: 1506 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: -11 m²/s²
0-3 km storm-relative helicity: 141 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.

649 
WWUS9 KMKC 122028
SEL0  
MKC WW 122028
COZ000-KSZ000-NEZ000-130300-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 430
STORM PREDICTION CENTER NORMAN OK
328 PM CDT MON JUN 12 2000

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

   NORTHEAST COLORADO                           
   WESTERN KANSAS                             
   WESTERN NEBRASKA                           

EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 400 PM UNTIL 1000
PM 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 60 STATUTE MILES
EITHER SIDE OF A LINE FROM 50 MILES SOUTH OF GOODLAND KANSAS TO 55
MILES WEST NORTHWEST 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 429...

DISCUSSION...DRY LINE HAS FORMED NERN CO AND WILL FOCUS STORM
INITIATION IN UNSTABLE AIRMASS WITH VERY STEEP LAPSE RATES.  STORMS
EXPECTED TO DEVELOP EWD AND NWD ALONG DRY LINE INTO WRN NEB AND
WITH CAPES TO 3500 J/KG DAMAGING WINDS WILL BE PRIMARY THREAT WITH
EXPECTED HIGH BASES OF STORMS.


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 550.  MEAN STORM
MOTION VECTOR 25025.


...HALES

383,1024 430,1024 430,1002 384,1003

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 12, 1:30 PM MDT	Severe Thunderstorm Watch	SPC	Baca, Kiowa, Prowers	6 hr

Nearby

Severe Thunderstorm Watches in Nebraska, 2000 Severe Thunderstorm Watches in Kansas, 2000 Severe Thunderstorm Watches in Colorado, 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.