Alert archive / Colorado / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 266, NWS Goodland, KS

September 11, 1999Cheyenne County, Colorado

NWS Goodland, KS issued this severe thunderstorm warning at Sep 11, 1999, 2:15 PM MDT for Cheyenne County, Colorado. It was in force for 50 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: Sep 11, 1999, 2:15 PM MDT (20:15 UTC)
Expired: Sep 11, 1999, 3:05 PM MDT
In force: 50 min
Issued by: NWS Goodland, KS
Area: Whole counties

County Cheyenne County, CO

The radar

The Goodland radar (KGLD), 98 km from the middle of the area, began a volume at 20:16 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
Sep 11, 2:17 PM MDT	Thunderstorm Wind 53	Cheyenne Wells, 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

Dodge City, (KDDC), launched 12:00Z, 8.3 hours before the alert went out and 264 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: 185 J/kg
Mixed-layer CIN: -259 J/kg
Mixed-layer LCL: 672 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: -3 m²/s²
0-3 km storm-relative helicity: 23 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 Goodland, KS wrote its last area forecast discussion before this severe thunderstorm warning went out at Sep 11, 11:52 AM MDT, 2 hours 23 minutes earlier.

Area forecast discussion, Sep 11, 11:52 AM MDT, 2 hours 23 minutes before

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In the hours before

Special weather statement, Sep 11, 10:27 AM MDT, 3 hours 48 minutes before

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Special weather statement, Sep 11, 10:27 AM MDT, 3 hours 48 minutes before

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      <div class="status" id="status">Temporary Notice</div>
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Local storm report, Sep 11, 2:08 PM MDT, 7 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GOODLAND KS
208 PM MDT SAT SEP 11 1999

TIME(MDT)  .....CITY LOCATION..... STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0150 PM    HERNDON                   KS    1.75 INCH HAIL
09/11/99   RAWLINS

0200 PM    HERNDON                   KS    1 INCH HAIL
09/11/99   RAWLINS

SULLIVAN

Local storm report, Sep 11, 2:08 PM MDT, 7 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GOODLAND KS
208 PM MDT SAT SEP 11 1999

TIME(MDT)  .....CITY LOCATION..... STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0150 PM    HERNDON                   KS    1.75 INCH HAIL
09/11/99   RAWLINS

0200 PM    HERNDON                   KS    1 INCH HAIL
09/11/99   RAWLINS

SULLIVAN

The office that day

Everything else NWS Goodland, KS issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Sep 11, 1:52 PM MDT	Severe Thunderstorm Warning	GLD	Rawlins	48 min
Sep 11, 2:03 PM MDT	Severe Thunderstorm Warning	GLD	Decatur	47 min
Sep 11, 2:51 PM MDT	Severe Thunderstorm Warning	GLD	Decatur	64 min
Sep 11, 3:14 PM MDT	Severe Thunderstorm Warning	GLD	Logan	61 min
Sep 11, 3:24 PM MDT	Tornado Warning	GLD	Logan	66 min
Sep 11, 3:29 PM MDT	Severe Thunderstorm Warning	GLD	Greeley	51 min
Sep 11, 3:55 PM MDT	Severe Thunderstorm Warning	GLD	Decatur, Norton	60 min
Sep 11, 4:02 PM MDT	Severe Thunderstorm Warning	GLD	Logan	63 min
Sep 11, 4:22 PM MDT	Severe Thunderstorm Warning	GLD	Sheridan	63 min

Nearby

Severe Thunderstorm Warnings in Colorado, 1999 Every 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.