Alert archive / Nebraska / Tornado Watches in 1999

Tornado Watch 475

June 26, 19994 counties in Colorado; 8 counties in Kansas; 22 counties in Nebraska

The Storm Prediction Center issued this tornado watch at Jun 26, 1999, 6:00 PM MDT for 4 counties in Colorado; 8 counties in Kansas; 22 counties in Nebraska. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Jun 26, 1999, 6:00 PM MDT (00:00 UTC)
Expired
Jun 27, 1999, 12:00 AM MDT
In force
6 hr
Issued by
the Storm Prediction Center
All 34 counties

Kit Carson County, CO, Phillips County, CO, Sedgwick County, CO, Yuma County, CO, Cheyenne County, KS, Decatur County, KS, Graham County, KS, Norton County, KS, Rawlins County, KS, Sheridan County, KS, Sherman County, KS, Thomas County, KS, Arthur County, NE, Blaine County, NE, Chase County, NE, Custer County, NE, Dawson County, NE, Deuel County, NE, Dundy County, NE, Frontier County, NE, Furnas County, NE, Garden County, NE, Gosper County, NE, Grant County, NE, Hayes County, NE, Hitchcock County, NE, Hooker County, NE, Keith County, NE, Lincoln County, NE, Logan County, NE, McPherson County, NE, Perkins County, NE, Red Willow County, NE, Thomas County, NE

The radar

The North Platte radar (KLNX), 113 km from the middle of the area, began a volume at 00:03 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

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

IssuedProductOfficeCountiesLasted
Jun 26, 6:54 PM MDTSevere Thunderstorm WarningGLDRed Willow51 min
Jun 26, 7:47 PM MDTSevere Thunderstorm WarningGLDRed Willow48 min
Jun 26, 8:05 PM MDTTornado WarningGLDRed Willow50 min
Jun 26, 8:41 PM MDTSevere Thunderstorm WarningGLDRed Willow44 min
Jun 26, 8:44 PM MDTTornado WarningBOULogan, Sedgwick46 min
Jun 26, 8:54 PM MDTTornado WarningGLDDecatur66 min
Jun 26, 9:14 PM MDTTornado WarningBOULogan, Phillips, Sedgwick41 min
Jun 26, 9:29 PM MDTFlash Flood WarningGLDRed Willow3 hr
Jun 26, 9:44 PM MDTSevere Thunderstorm WarningGLDYuma46 min
Jun 26, 9:55 PM MDTTornado WarningBOULogan, Phillips, Sedgwick35 min
Jun 26, 9:59 PM MDTSevere Thunderstorm WarningGLDDecatur, Norton61 min
Jun 26, 10:05 PM MDTSevere Thunderstorm WarningLBFKeith, Lincoln60 min
Jun 26, 10:25 PM MDTSevere Thunderstorm WarningLBFChase65 min
Jun 26, 10:30 PM MDTTornado WarningBOULogan, Phillips20 min
Jun 26, 10:30 PM MDTSevere Thunderstorm WarningGLDYuma60 min
Jun 26, 10:59 PM MDTSevere Thunderstorm WarningGLDNorton61 min
Jun 26, 11:02 PM MDTSevere Thunderstorm WarningGLDDundy63 min
Jun 26, 11:08 PM MDTSevere Thunderstorm WarningLBFLincoln62 min
Jun 26, 11:29 PM MDTSevere Thunderstorm WarningGLDYuma61 min
Jun 26, 11:43 PM MDTSevere Thunderstorm WarningGLDCheyenne57 min
Jun 26, 11:43 PM MDTSevere Thunderstorm WarningLBFCuster, Lincoln62 min

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 0.0 hours before the alert went out and 30 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, N. Platte/Lee Bi, NE at 00:00Z on 1999-06-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2382 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, N. Platte/Lee Bi, NE at 00:00Z on 1999-06-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -37 square meters per square second.19395878Sfc1 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
2382 J/kg
Mixed-layer CIN
-50 J/kg
Mixed-layer LCL
1184 m above ground
0-6 km bulk shear
44 kt
0-1 km storm-relative helicity
-37 m²/s²
0-3 km storm-relative helicity
120 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 26, 10:45 PM MDTSevere Thunderstorm WatchSPCKit Carson, Phillips, Sedgwick, Yuma5 hr
Jun 27, 2:15 AM MDTSevere Thunderstorm WatchSPCClay, Cloud, Graham, Jewell, Marshall, Mitchell and 8 more6 hr
Jun 27, 5:00 AM MDTSevere Thunderstorm WatchSPCAtchison, Brown, Doniphan, Douglas, Franklin, Jackson and 10 more5 hr
Jun 27, 2:30 PM MDTTornado WatchSPCBanner, Box Butte, Cheyenne, Dawes, Deuel, Kimball and 3 more6 hr
Jun 27, 4:30 PM MDTSevere Thunderstorm WatchSPCBlaine, Boyd, Brown, Cherry, Garfield, Grant and 8 more7 hr

Nearby

Tornado Watches in Nebraska, 1999Tornado Watches in Kansas, 1999Tornado Watches in Colorado, 1999Every tornado watch in 1999

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.