Alert archive / Nebraska / Tornado Watches in 2000

Tornado Watch 495

June 25, 200012 counties in Iowa; Atchison County, Holt County, Missouri; 56 counties in Nebraska

The Storm Prediction Center issued this tornado watch at Jun 25, 2000, 1:30 PM CDT for 12 counties in Iowa; Atchison County, Holt County, Missouri; 56 counties in Nebraska. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued
Jun 25, 2000, 1:30 PM CDT (18:30 UTC)
Expired
Jun 25, 2000, 8:00 PM CDT
In force
7 hr
Issued by
the Storm Prediction Center
All 70 counties

Audubon County, IA, Carroll County, IA, Cass County, IA, Crawford County, IA, Fremont County, IA, Harrison County, IA, Mills County, IA, Monona County, IA, Montgomery County, IA, Page County, IA, Pottawattamie County, IA, Shelby County, IA, Atchison County, MO, Holt County, MO, Adams County, NE, Antelope County, NE, Blaine County, NE, Boone County, NE, Buffalo County, NE, Burt County, NE, Butler County, NE, Cass County, NE, Clay County, NE, Colfax County, NE, Cuming County, NE, Custer County, NE, Dawson County, NE, Dodge County, NE, Douglas County, NE, Fillmore County, NE, Franklin County, NE, Furnas County, NE, Gage County, NE, Garfield County, NE, Gosper County, NE, Greeley County, NE, Hall County, NE, Hamilton County, NE, Harlan County, NE, Howard County, NE, Jefferson County, NE, Johnson County, NE, Kearney County, NE, Lancaster County, NE, Loup County, NE, Madison County, NE, Merrick County, NE, Nance County, NE, Nemaha County, NE, Nuckolls County, NE, Otoe County, NE, Pawnee County, NE, Phelps County, NE, Platte County, NE, Polk County, NE, Richardson County, NE, Saline County, NE, Sarpy County, NE, Saunders County, NE, Seward County, NE, Sherman County, NE, Stanton County, NE, Thayer County, NE, Thurston County, NE, Valley County, NE, Washington County, NE, Wayne County, NE, Webster County, NE, Wheeler County, NE, York County, NE

The radar

The Grand Island radar (KUEX), 70 km from the middle of the area, began a volume at 18:30 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

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

IssuedProductOfficeCountiesLasted
Jun 25, 1:44 PM CDTTornado WarningOAXColfax, Platte31 min
Jun 25, 1:56 PM CDTTornado WarningGIDMerrick34 min
Jun 25, 2:02 PM CDTTornado WarningOAXBurt, Cuming28 min
Jun 25, 2:14 PM CDTTornado WarningOAXColfax, Platte31 min
Jun 25, 2:21 PM CDTSevere Thunderstorm WarningOAXShelby39 min
Jun 25, 2:21 PM CDTSevere Thunderstorm WarningOAXHarrison24 min
Jun 25, 2:34 PM CDTSevere Thunderstorm WarningOAXBurt41 min
Jun 25, 2:43 PM CDTTornado WarningOAXColfax, Dodge32 min
Jun 25, 2:49 PM CDTSevere Thunderstorm WarningGIDHamilton, York41 min
Jun 25, 2:59 PM CDTSevere Thunderstorm WarningGIDMerrick, Polk46 min
Jun 25, 3:00 PM CDTSevere Thunderstorm WarningOAXButler, Saunders45 min
Jun 25, 3:01 PM CDTSevere Thunderstorm WarningOAXPottawattamie, Shelby39 min
Jun 25, 3:14 PM CDTSevere Thunderstorm WarningGIDClay46 min
Jun 25, 3:15 PM CDTSevere Thunderstorm WarningDMXCass45 min
Jun 25, 3:17 PM CDTTornado WarningOAXCass, Sarpy, Saunders28 min
Jun 25, 3:25 PM CDTSevere Thunderstorm WarningGIDYork50 min
Jun 25, 3:31 PM CDTSevere Thunderstorm WarningOAXPottawattamie44 min
Jun 25, 3:36 PM CDTSevere Thunderstorm WarningGIDWebster39 min
Jun 25, 3:45 PM CDTSevere Thunderstorm WarningOAXCass, Sarpy, Saunders45 min
Jun 25, 3:50 PM CDTSevere Thunderstorm WarningGIDFillmore40 min
Jun 25, 4:00 PM CDTSevere Thunderstorm WarningGIDClay45 min
Jun 25, 4:03 PM CDTSevere Thunderstorm WarningGIDFurnas, Harlan42 min
Jun 25, 4:03 PM CDTSevere Thunderstorm WarningOAXLancaster, Seward27 min
Jun 25, 4:13 PM CDTFlash Flood WarningOAXDodge4 hr
Jun 25, 4:17 PM CDTSevere Thunderstorm WarningGIDWebster43 min
Jun 25, 4:22 PM CDTTornado WarningOAXLancaster23 min
Jun 25, 4:25 PM CDTSevere Thunderstorm WarningGIDHarlan50 min
Jun 25, 4:32 PM CDTSevere Thunderstorm WarningOAXFremont43 min
Jun 25, 4:32 PM CDTSevere Thunderstorm WarningOAXMills, Montgomery, Page43 min
Jun 25, 4:39 PM CDTSevere Thunderstorm WarningOAXSaline26 min
Jun 25, 4:42 PM CDTSevere Thunderstorm WarningGIDFranklin48 min
Jun 25, 4:45 PM CDTSevere Thunderstorm WarningOAXLancaster30 min
Jun 25, 5:06 PM CDTFlash Flood WarningOAXThurston6 hr
Jun 25, 5:13 PM CDTFlash Flood WarningOAXLancaster, Saline, Seward4 hr
Jun 25, 5:17 PM CDTSevere Thunderstorm WarningOAXGage, Jefferson, Johnson43 min
Jun 25, 5:22 PM CDTSevere Thunderstorm WarningGIDFillmore, York38 min
Jun 25, 5:29 PM CDTSevere Thunderstorm WarningOAXNemaha46 min
Jun 25, 5:34 PM CDTSevere Thunderstorm WarningEAXAtchison41 min
Jun 25, 6:08 PM CDTFlash Flood WarningOAXOtoe4 hr
Jun 25, 6:47 PM CDTFlash Flood WarningOAXNemaha, Richardson4 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 12:00Z, 6.5 hours before the alert went out and 155 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-pSkew-T log-p diagram, Omaha, NE at 12:00Z on 2000-06-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 371 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Omaha, NE at 12:00Z on 2000-06-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 42 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
371 J/kg
Mixed-layer CIN
-296 J/kg
Mixed-layer LCL
1430 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
42 m²/s²
0-3 km storm-relative helicity
47 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.

000 
WWUS9 KMKC 251841

MKC WW 251806
IAZ000-MOZ000-NEZ000-260100-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 495
STORM PREDICTION CENTER NORMAN OK
106 PM CDT SUN JUN 25 2000

THE STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF

   WESTERN IOWA                               
   NORTHWEST MISSOURI                           
   CENTRAL AND EASTERN NEBRASKA                           

EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 130 PM UNTIL 800
PM CDT.

TORNADOES...HAIL TO 3 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE TORNADO WATCH AREA IS ALONG AND 140 STATUTE MILES EAST AND WEST
OF A LINE FROM 50 MILES WEST SOUTHWEST OF BEATRICE NEBRASKA TO 20
MILES NORTH NORTHWEST OF NORFOLK NEBRASKA.

REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND 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 494...

DISCUSSION...THUNDERSTORMS WILL INCREASE RAPIDLY ACROSS WATCH AREA
NEXT SEVERAL HOURS...WHERE INSTABILITY /CAPE TO 4000 J/KG/ AND LOW
LEVEL CONVERGENCE WILL BE FAVORABLE FOR FAST-GROWING SURFACE-BASED
UPDRAFTS.  GRADUALLY INCREASING SHEAR WILL BE SUFFICIENT FOR
SUPERCELLS WITH VERY LARGE HAIL/HIGH WINDS AND TORNADOES...
ESPECIALLY INVOF BOUNDARY STALLED NW/SE IN ERN NEB/WRN IA.  

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 3 INCHES.  EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 60 KNOTS.  A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550. 
MEAN STORM MOTION VECTOR 28025.

...CORFIDI

;395,1001 421,1001 421,0945 395,0945;

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 25, 3:00 PM CDTTornado WatchSPCAdair, Adams, Appanoose, Audubon, Benton, Boone and 38 more6 hr
Jun 25, 5:45 PM CDTSevere Thunderstorm WatchSPCAdair, Andrew, Buchanan, Caldwell, Carroll, Cass and 20 more4 hr

Nearby

Tornado Watches in Nebraska, 2000Tornado Watches in Iowa, 2000Tornado Watches in Missouri, 2000Every tornado 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.