Alert archive / Nebraska / Severe Thunderstorm Watches in 2000

Severe Thunderstorm Watch 435

June 12, 200023 counties in Nebraska

The Storm Prediction Center issued this severe thunderstorm watch at Jun 12, 2000, 7:15 PM CDT for 23 counties in Nebraska. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued: Jun 12, 2000, 7:15 PM CDT (00:15 UTC)
Expired: Jun 13, 2000, 1:00 AM CDT
In force: 6 hr
Issued by: the Storm Prediction Center

All 23 counties

Blaine County, NE, Boyd County, NE, Brown County, NE, Buffalo County, NE, Custer County, NE, Dawson County, NE, Franklin County, NE, Frontier County, NE, Furnas County, NE, Garfield County, NE, Gosper County, NE, Harlan County, NE, Holt County, NE, Kearney County, NE, Keya Paha County, NE, Logan County, NE, Loup County, NE, Phelps County, NE, Red Willow County, NE, Rock County, NE, Sherman County, NE, Thomas County, NE, Valley County, NE

Warnings issued inside it

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

Issued	Product	Office	Counties	Lasted
Jun 12, 7:23 PM CDT	Tornado Warning	LBF	Logan	67 min
Jun 12, 8:33 PM CDT	Severe Thunderstorm Warning	LBF	Logan	57 min
Jun 12, 8:50 PM CDT	Tornado Warning	LBF	Custer, Logan	25 min
Jun 12, 9:06 PM CDT	Severe Thunderstorm Warning	GID	Dawson	39 min
Jun 12, 9:19 PM CDT	Tornado Warning	LBF	Custer	41 min
Jun 12, 9:45 PM CDT	Severe Thunderstorm Warning	GID	Dawson	60 min
Jun 12, 10:02 PM CDT	Severe Thunderstorm Warning	LBF	Custer	58 min
Jun 12, 10:14 PM CDT	Tornado Warning	LBF	Custer	46 min
Jun 12, 10:25 PM CDT	Severe Thunderstorm Warning	GID	Valley	50 min
Jun 12, 10:36 PM CDT	Severe Thunderstorm Warning	GID	Sherman	54 min

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 0.3 hours before the alert went out and 62 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: 1538 J/kg
Mixed-layer CIN: -19 J/kg
Mixed-layer LCL: 2700 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 47 m²/s²
0-3 km storm-relative helicity: 169 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.0

Open this sounding in Storm Lab

The text

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

992 
WWUS9 KMKC 130002
SEL5  

SEL5  
MKC WW 130002
NEZ000-130600-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 435
STORM PREDICTION CENTER NORMAN OK
702 PM CDT MON JUN 12 2000

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

   CENTRAL NEBRASKA                           

EFFECTIVE THIS MONDAY NIGHT AND TUESDAY MORNING FROM 715 PM UNTIL
100 AM CDT.

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 50 STATUTE MILES
EAST AND WEST OF A LINE FROM 40 MILES EAST SOUTHEAST OF MCCOOK
NEBRASKA TO 45 MILES NORTHEAST OF AINSWORTH 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...WW 430...WW
431...WW 432...WW 433...WW 434...

DISCUSSION...CONVECTION NOW IN W CNTRL NEB...WHICH FORMED IN DEEP-
MIXED ENVIRONMENT EARLIER TODAY...EXPECTED TO EVOLVE INTO AN MCS
LATER THIS EVENING AS THE STORMS BECOME ROOTED IN COOLER/MOISTER
BOUNDARY LAYER ACROSS CENTRAL NEB.  SUSTAINED INFLOW ASSOCIATED
WITH GLANCING PASSAGE OF UPPER SHORTWAVE HEADED FOR SD/ND SHOULD
ENHANCE POTENTIAL FOR A FEW SUSTAINED STORMS WITH DAMAGING WINDS.

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 500.  MEAN STORM
MOTION VECTOR 23030.

...CORFIDI

430,0982 395,0985 395,1004 430,1002

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 12, 11:00 PM CDT	Severe Thunderstorm Watch	SPC	Antelope, Boone, Burt, Butler, Cedar, Colfax and 23 more	5 hr
Jun 13, 2:00 PM CDT	Tornado Watch	SPC	Burt, Butler, Cass, Colfax, Cuming, Dakota and 18 more	6 hr

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.