Alert archive / Colorado / Severe Thunderstorm Warnings in 1996

Severe Thunderstorm Warning 238, NWS Denver/Boulder, CO

August 2, 1996Weld County, Colorado

NWS Denver/Boulder, CO issued this severe thunderstorm warning at Aug 2, 1996, 10:23 PM MDT for Weld County, Colorado. It was in force for 37 min. 1 report 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: Aug 2, 1996, 10:23 PM MDT (04:23 UTC)
Expired: Aug 2, 1996, 11:00 PM MDT
In force: 37 min
Issued by: NWS Denver/Boulder, CO
Area: Whole counties

County Weld County, CO

The radar

The Cheyenne radar (KCYS), 75 km from the middle of the area, began a volume at 04:23 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.

What was reported inside it

Time	Report	Where	Remark
Aug 2, 10:30 PM MDT	Thunderstorm Wind	Windsor, 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

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 4.4 hours before the alert went out and 325 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 2000 J/kg
Mixed-layer CIN: -104 J/kg
Mixed-layer LCL: 862 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 166 m²/s²
0-3 km storm-relative helicity: 354 m²/s²
Significant tornado parameter: 1.9
Supercell composite: 14.6

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.

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, Aug 2, 5:21 PM MDT, 5 hours 2 minutes before

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Special weather statement, Aug 2, 9:54 PM MDT, 29 minutes before

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<body>
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    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
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      <p id="message2">
        Please try again in a few minutes.
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The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 2, 8:01 PM MDT	Severe Thunderstorm Warning	BOU	Elbert	29 min
Aug 3, 3:21 PM MDT	Severe Thunderstorm Warning	BOU	Elbert, Lincoln	39 min
Aug 3, 4:03 PM MDT	Severe Thunderstorm Warning	BOU	Lincoln	42 min
Aug 3, 4:19 PM MDT	Severe Thunderstorm Warning	BOU	Washington	41 min
Aug 3, 4:57 PM MDT	Severe Thunderstorm Warning	BOU	Washington	33 min

Nearby

Severe Thunderstorm Warnings in Colorado, 1996 Every severe thunderstorm warning in 1996

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; radar from the NEXRAD Level II archive.