Alert archive / Wyoming / Severe Thunderstorm Watches in 2001

Severe Thunderstorm Watch 519

July 6, 20015 counties in Nebraska; 12 counties in Wyoming

The Storm Prediction Center issued this severe thunderstorm watch at Jul 6, 2001, 3:00 PM MDT for 5 counties in Nebraska; 12 counties in Wyoming. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Jul 6, 2001, 3:00 PM MDT (21:00 UTC)
Expired
Jul 6, 2001, 9:00 PM MDT
In force
6 hr
Issued by
the Storm Prediction Center

Counties Banner County, NE, Cheyenne County, NE, Kimball County, NE, Scotts Bluff County, NE, Sioux County, NE, Albany County, WY, Campbell County, WY, Converse County, WY, Crook County, WY, Goshen County, WY, Johnson County, WY, Laramie County, WY, Natrona County, WY, Niobrara County, WY, Platte County, WY, Sheridan County, WY, Weston County, WY

The radar

The Rapid City radar (KUDX), 204 km from the middle of the area, began a volume at 21:02 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 6, 5:39 PM MDTSevere Thunderstorm WarningCYSGoshen, Platte36 min
Jul 6, 6:18 PM MDTSevere Thunderstorm WarningCYSConverse27 min
Jul 6, 6:23 PM MDTSevere Thunderstorm WarningUNRCrook52 min
Jul 6, 6:45 PM MDTSevere Thunderstorm WarningCYSNiobrara30 min
Jul 6, 7:15 PM MDTSevere Thunderstorm WarningCYSNiobrara60 min
Jul 6, 8:10 PM MDTSevere Thunderstorm WarningUNRWeston35 min

The nearest sounding before it

Rapid City, SD (KUNR), launched 12:00Z, 9.0 hours before the alert went out and 197 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, Rapid City, SD at 12:00Z on 2001-07-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 619 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, Rapid City, SD at 12:00Z on 2001-07-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -73 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
619 J/kg
Mixed-layer CIN
-462 J/kg
Mixed-layer LCL
1907 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
-73 m²/s²
0-3 km storm-relative helicity
55 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.8

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 Wyoming, 2001Severe Thunderstorm Watches in Nebraska, 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.