Alert archive / Nebraska / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 217, NWS North Platte, NE

August 28, 1999Deuel County, Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at Aug 28, 1999, 3:53 PM MDT for Deuel County, Nebraska. It was in force for 32 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 28, 1999, 3:53 PM MDT (21:53 UTC)
Expired
Aug 28, 1999, 4:25 PM MDT
In force
32 min
Issued by
NWS North Platte, NE
Area
Whole counties

County Deuel County, NE

The radar

The North Platte radar (KLNX), 174 km from the middle of the area, began a volume at 21:56 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

TimeReportWhereRemark
Aug 28, 4:05 PM MDTHail 0.75Big Spgs, NE

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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Aug 28, 2:15 PM MDTSevere Thunderstorm WatchSPC5 hr

The nearest sounding before it

Denver, CO (KDNR), launched 12:00Z, 9.9 hours before the alert went out and 158 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 1999-08-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1 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 1999-08-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 62 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
1 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1080 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
62 m²/s²
0-3 km storm-relative helicity
83 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.

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.

NWS North Platte, NE wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 28, 1:50 PM MDT, 2 hours 3 minutes earlier.

Area forecast discussion, Aug 28, 1:50 PM MDT, 2 hours 3 minutes before
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In the hours before

Special weather statement, Aug 28, 10:18 AM MDT, 5 hours 35 minutes before
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Special weather statement, Aug 28, 10:18 AM MDT, 5 hours 35 minutes before
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Special weather statement, Aug 28, 10:18 AM MDT, 5 hours 35 minutes before
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Special weather statement, Aug 28, 10:18 AM MDT, 5 hours 35 minutes before
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Local storm report, Aug 28, 3:43 PM MDT, 10 minutes before
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Local storm report, Aug 28, 3:43 PM MDT, 10 minutes before
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The office that day

Everything else NWS North Platte, NE issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 28, 3:00 PM MDTSevere Thunderstorm WarningLBFKeith65 min
Aug 28, 3:59 PM MDTSevere Thunderstorm WarningLBFLincoln61 min
Aug 28, 4:13 PM MDTSevere Thunderstorm WarningLBFKeith62 min
Aug 28, 4:50 PM MDTSevere Thunderstorm WarningLBFPerkins60 min
Aug 28, 4:58 PM MDTSevere Thunderstorm WarningLBFLincoln62 min
Aug 28, 5:24 PM MDTSevere Thunderstorm WarningLBFChase61 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 1999Every severe thunderstorm warning in 1999

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.