Alert archive / Wyoming / Tornado Watches in 1998

Tornado Watch 433

May 26, 19985 counties in Nebraska; 10 counties in Wyoming

The Storm Prediction Center issued this tornado watch at May 26, 1998, 2:00 PM MDT for 5 counties in Nebraska; 10 counties in Wyoming. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
May 26, 1998, 2:00 PM MDT (20:00 UTC)
Expired
May 26, 1998, 8:00 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, Campbell County, WY, Converse County, WY, Crook County, WY, Goshen County, WY, Johnson County, WY, Laramie County, WY, Niobrara County, WY, Platte County, WY, Sheridan County, WY, Weston County, WY

The radar

The Rapid City radar (KUDX), 186 km from the middle of the area, began a volume at 20:06 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
May 26, 2:43 PM MDTSevere Thunderstorm WarningRIWJohnson27 min
May 26, 3:18 PM MDTSevere Thunderstorm WarningRIWJohnson47 min
May 26, 5:26 PM MDTSevere Thunderstorm WarningUNRCampbell29 min
May 26, 5:55 PM MDTSevere Thunderstorm WarningUNRCampbell30 min
May 26, 6:17 PM MDTSevere Thunderstorm WarningCYSKimball48 min
May 26, 6:33 PM MDTSevere Thunderstorm WarningUNRWeston32 min

The nearest sounding before it

Rapid City, SD (KUNR), launched 12:00Z, 8.0 hours before the alert went out and 179 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 1998-05-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 22 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 1998-05-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 2 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
22 J/kg
Mixed-layer CIN
-220 J/kg
Mixed-layer LCL
1186 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
2 m²/s²
0-3 km storm-relative helicity
0 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
May 26, 12:00 PM MDTSevere Thunderstorm WatchSPCLincoln, Teton, Uinta5 hr

Nearby

Tornado Watches in Wyoming, 1998Tornado Watches in Nebraska, 1998Every tornado watch in 1998

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.