Alert archive / Colorado / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 87, NWS Goodland, KS

June 2, 1999Yuma County, Colorado

NWS Goodland, KS issued this severe thunderstorm warning at Jun 2, 1999, 8:10 PM MDT for Yuma County, Colorado. It was in force for 35 min. 2 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: Jun 2, 1999, 8:10 PM MDT (02:10 UTC)
Expired: Jun 2, 1999, 8:45 PM MDT
In force: 35 min
Issued by: NWS Goodland, KS
Area: Whole counties

County Yuma County, CO

The radar

The Goodland radar (KGLD), 94 km from the middle of the area, began a volume at 02:10 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
Jun 2, 8:15 PM MDT	Hail 1.5	Laird, CO
Jun 2, 8:15 PM MDT	Hail 1.5	Laird, 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, 2.2 hours before the alert went out and 70 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: 55 J/kg
Mixed-layer CIN: -125 J/kg
Mixed-layer LCL: 3304 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 111 m²/s²
0-3 km storm-relative helicity: 146 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.8

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 Jun 2, 2:29 PM MDT, 5 hours 41 minutes earlier.

Area forecast discussion, Jun 2, 2:29 PM MDT, 5 hours 41 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GOODLAND KS
225 PM MDT (325 PM CDT) WED JUN 2 1999

...CHALLENGE ONCE AGAIN IS EXTENT OF TSTM COVERAGE AND SEVERITY
TONIGHT AND HIGH TEMPS ON FRI...

MOSTLY CLEAR SKIES OVER TRI-STATE AREA WITH GOOD SFC HEATING ONGOING
WITH TEMPS IN THE 80S. CWA IS IN SLIGHT OR MOD RISK AREA. DEWPOINTS
ARE IN THE UPPER 50S. AWAITING TRIGGER APPROACHING FROM THE SW.

INITIALIZATION OF MODELS THIS AM INDICATING ETA ONCE AGAIN SEEMED TO
BE BEST ON SPECIFICS...BOTH AT SFC AND ALOFT. SO I AM STAYING ONCE
AGAIN WITH IT. PATTERN FOR THIS EVENING IS PANNING OUT AS INDICATED
BY MODELS YESTERDAY. FORMER CUT-OFF 5H LOW OFF S CA IS NOW S/W
MOVING NE ACROSS NW NEW MEXICO. ASSOCIATED 25H JET MAX ON N SIDE OF
SUB-TROPICAL JET MOVING NE ACROSS S NEW MEXICO. E CO AND W KS SOON
TO BE UNDER FRONT LEFT. ETA SHOWS THETAE RIDGE LYING N-S ALONG KS/CO
BORDER THIS EVENING AND NEARLY SIMULTANEOUSLY CO-LOCATED 70H
UVV/POS-OMEGA MAX. MOD TO HI PWS...RAPIDLY DECAYING CIN...INCREASING
LIS AND SUFFICIENT MOISTURE ALL SEEM TO IMPLY A VERY LIVELY AND
STORMY EVENING INTO LATE NIGHT OVER THE TRI-STATE AREA. APPEARS 5H
TROUGH TO PASS OVERHEAD SHORTLY AFTER MIDNIGHT SO THINK WEATHER WILL
PROGRESS STEADILY FROM W-E ACROSS CWA AND BE CLEAR OF CWA BY
DAYBREAK. POSSIBLY SOME LEFT IN E SO WILL RETAIN 20 POPS THERE FOR
EARLY 2ND PD.

WEAKER VORT TO COME INTO CWA FROM S/W LATE THU MAY TRIGGER A FEW
TSTMS BUT EXPECT MOSTLY A NON-WEATHER EVENTFUL EVENING THU. UPPER
MAJOR TROUGH OVER INTER-MT AREA REDEEPENS THU NIGHT-FRI FROM STRONG
VORT MAX MOVING DOWN WEST COAST. AT SAME TIME RIDGE BUILDS OVER CEN
US. RESULT SHOULD BE INCREASING HEAT LATE THU/FRI OVER CWA WITH
MINIMAL CLOUDINESS.

BRIEFLY IN EXTENDED VORT MAX MOVES NE OUT OF WESTERN TROUGH INTO CEN
PLAINS LATE SAT AND LOOKS LIKE POTENTIAL NEXT SEVERE WX EVENT AFTER
TONIGHT. THEN PDS OF SCT TSTMS AND NEAR NORMAL TEMPS APPLY FOR REST
OF EXTENDED.

.GLD...NONE.

RJC

In the hours before

Local storm report, Jun 2, 7:30 PM MDT, 40 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GOODLAND KS
730 PM MDT WED JUN 02 1999

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

0725 PM    WRAY                      CO    1 INCH HAIL
06/02/99   YUMA

0725 PM    7 W WRAY                  CO    2.5 INCH HAIL
06/02/99   YUMA

0726 PM    3 NW WRAY                 CO    1.75 INCH HAIL
06/02/99   YUMA

SULLIVAN

Local storm report, Jun 2, 7:30 PM MDT, 40 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GOODLAND KS
730 PM MDT WED JUN 02 1999

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

0725 PM    WRAY                      CO    1 INCH HAIL
06/02/99   YUMA

0725 PM    7 W WRAY                  CO    2.5 INCH HAIL
06/02/99   YUMA

0726 PM    3 NW WRAY                 CO    1.75 INCH HAIL
06/02/99   YUMA

SULLIVAN

Local storm report, Jun 2, 7:45 PM MDT, 25 minutes before

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Local storm report, Jun 2, 7:45 PM MDT, 25 minutes before

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Local storm report, Jun 2, 8:07 PM MDT, 3 minutes before

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Local storm report, Jun 2, 8:07 PM MDT, 3 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 3, 5:10 PM MDT	Severe Thunderstorm Warning	GLD	Norton	50 min
Jun 2, 6:39 PM MDT	Severe Thunderstorm Warning	GLD	Yuma	51 min
Jun 2, 7:04 PM MDT	Tornado Warning	GLD	Yuma	31 min
Jun 2, 7:37 PM MDT	Tornado Warning	GLD	Yuma	33 min
Jun 2, 8:12 PM MDT	Severe Thunderstorm Warning	GLD	Dundy	48 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.