Alert archive / Nebraska / Severe Thunderstorm Watches in 2001

Severe Thunderstorm Watch 497

July 2, 20014 counties in Colorado; 25 counties in Nebraska; Converse County, Goshen County, Wyoming

The Storm Prediction Center issued this severe thunderstorm watch at Jul 2, 2001, 3:00 PM MDT for 4 counties in Colorado; 25 counties in Nebraska; Converse County, Goshen County, Wyoming. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued
Jul 2, 2001, 3:00 PM MDT (21:00 UTC)
Expired
Jul 2, 2001, 10:00 PM MDT
In force
7 hr
Issued by
the Storm Prediction Center
All 31 counties

Logan County, CO, Phillips County, CO, Sedgwick County, CO, Yuma County, CO, Arthur County, NE, Banner County, NE, Box Butte County, NE, Chase County, NE, Cheyenne County, NE, Dawes County, NE, Deuel County, NE, Dundy County, NE, Frontier County, NE, Furnas County, NE, Garden County, NE, Grant County, NE, Hayes County, NE, Hitchcock County, NE, Hooker County, NE, Keith County, NE, Kimball County, NE, Lincoln County, NE, McPherson County, NE, Morrill County, NE, Perkins County, NE, Red Willow County, NE, Scotts Bluff County, NE, Sheridan County, NE, Sioux County, NE, Converse County, WY, Goshen County, WY

The radar

The North Platte radar (KLNX), 146 km from the middle of the area, began a volume at 21:03 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

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

IssuedProductOfficeCountiesLasted
Jul 2, 4:45 PM MDTSevere Thunderstorm WarningLBFGarden45 min
Jul 2, 5:00 PM MDTSevere Thunderstorm WarningLBFGrant45 min
Jul 2, 5:46 PM MDTSevere Thunderstorm WarningLBFGrant29 min
Jul 2, 6:38 PM MDTSevere Thunderstorm WarningLBFHooker52 min
Jul 2, 7:57 PM MDTSevere Thunderstorm WarningGLDYuma48 min
Jul 2, 8:45 PM MDTSevere Thunderstorm WarningGLDYuma45 min

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 12:00Z, 9.0 hours before the alert went out and 161 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 12:00Z on 2001-07-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 208 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 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 12:00Z on 2001-07-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 108 square meters per square second.193958Sfc1 km3 km6 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
208 J/kg
Mixed-layer CIN
-600 J/kg
Mixed-layer LCL
1111 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
108 m²/s²
0-3 km storm-relative helicity
241 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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.

Nearby

Severe Thunderstorm Watches in Nebraska, 2001Severe Thunderstorm Watches in Colorado, 2001Severe Thunderstorm Watches in Wyoming, 2001Every severe thunderstorm watch in 2001

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.