Alert archive / Colorado / Severe Thunderstorm Watches in 2001

Severe Thunderstorm Watch 535

July 9, 200111 counties in Colorado; 11 counties in Nebraska; Goshen County, Laramie County, Wyoming

The Storm Prediction Center issued this severe thunderstorm watch at Jul 9, 2001, 5:45 PM MDT for 11 counties in Colorado; 11 counties in Nebraska; Goshen County, Laramie County, Wyoming. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued
Jul 9, 2001, 5:45 PM MDT (23:45 UTC)
Expired
Jul 9, 2001, 11:00 PM MDT
In force
5 hr
Issued by
the Storm Prediction Center
All 24 counties

Adams County, CO, Arapahoe County, CO, Elbert County, CO, Kit Carson County, CO, Logan County, CO, Morgan County, CO, Phillips County, CO, Sedgwick County, CO, Washington County, CO, Weld County, CO, Yuma County, CO, Banner County, NE, Box Butte County, NE, Cheyenne County, NE, Dawes County, NE, Deuel County, NE, Garden County, NE, Kimball County, NE, Morrill County, NE, Scotts Bluff County, NE, Sheridan County, NE, Sioux County, NE, Goshen County, WY, Laramie County, WY

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Jul 9, 6:27 PM MDTFlash Flood WarningBOUArapahoe2 hr
Jul 9, 6:36 PM MDTSevere Thunderstorm WarningBOUMorgan39 min
Jul 9, 8:00 PM MDTSevere Thunderstorm WarningBOUMorgan45 min
Jul 9, 8:17 PM MDTTornado WarningBOUMorgan43 min
Jul 9, 8:39 PM MDTSevere Thunderstorm WarningBOUWeld51 min
Jul 9, 8:46 PM MDTTornado WarningBOUMorgan, Washington29 min
Jul 9, 9:25 PM MDTSevere Thunderstorm WarningCYSDawes60 min
Jul 9, 9:29 PM MDTSevere Thunderstorm WarningLBFSheridan61 min
Jul 9, 9:39 PM MDTFlash Flood WarningBOUMorgan2 hr
Jul 9, 10:33 PM MDTSevere Thunderstorm WarningLBFSheridan57 min

The nearest sounding before it

Denver, CO (KDNR), launched 12:00Z, 11.8 hours before the alert went out and 177 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, Denver, CO at 12:00Z on 2001-07-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 12 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, Denver, CO at 12:00Z on 2001-07-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 13 square meters per square second.1939Sfc1 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
12 J/kg
Mixed-layer CIN
-548 J/kg
Mixed-layer LCL
2352 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
13 m²/s²
0-3 km storm-relative helicity
31 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 Colorado, 2001Severe Thunderstorm Watches in Nebraska, 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.