Alert archive / Colorado / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 109, NWS Denver/Boulder, CO

July 1, 1998Elbert County, Lincoln County, Colorado

NWS Denver/Boulder, CO issued this severe thunderstorm warning at Jul 1, 1998, 6:27 PM MDT for Elbert County, Lincoln County, Colorado. It was in force for 48 min. 3 reports came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
Jul 1, 1998, 6:27 PM MDT (00:27 UTC)
Expired
Jul 1, 1998, 7:15 PM MDT
In force
48 min
Issued by
NWS Denver/Boulder, CO
Area
Whole counties; the outline is the Mesonet’s reconstruction

Counties Elbert County, CO, Lincoln County, CO

What was reported inside it

TimeReportWhereRemark
Jul 1, 6:45 PM MDTThunderstorm Wind 61Karval, CO
Jul 1, 6:45 PM MDTHail 1.5Limon, CO
Jul 1, 6:45 PM MDTHail 1.5Kutch, CO

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The nearest sounding before it

Denver, CO (KDNR), launched 00:00Z, 0.5 hours before the alert went out and 96 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 00:00Z on 1998-07-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1351 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 00:00Z on 1998-07-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 20 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
1351 J/kg
Mixed-layer CIN
-39 J/kg
Mixed-layer LCL
2220 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
20 m²/s²
0-3 km storm-relative helicity
91 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.9

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.

The office that day

Everything else NWS Denver/Boulder, CO issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 1, 6:03 PM MDTSevere Thunderstorm WarningBOUElbert, Lincoln42 min
Jul 1, 6:29 PM MDTSevere Thunderstorm WarningBOUWeld46 min
Jul 1, 6:52 PM MDTSevere Thunderstorm WarningBOUMorgan53 min
Jul 1, 7:15 PM MDTTornado WarningBOUWeld30 min
Jul 1, 7:16 PM MDTSevere Thunderstorm WarningBOUElbert, Lincoln44 min
Jul 1, 7:44 PM MDTTornado WarningBOUMorgan, Weld31 min
Jul 1, 9:29 PM MDTSevere Thunderstorm WarningBOUMorgan41 min
Jul 2, 5:31 PM MDTSevere Thunderstorm WarningBOULarimer, Weld29 min

Nearby

Severe Thunderstorm Warnings in Colorado, 1998Every severe thunderstorm warning 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.