Alert archive / Colorado / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 82, NWS Goodland, KS

June 20, 1998Kit Carson County, Colorado

NWS Goodland, KS issued this severe thunderstorm warning at Jun 20, 1998, 5:58 PM MDT for Kit Carson County, Colorado. It was in force for 47 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Jun 20, 1998, 5:58 PM MDT (23:58 UTC)
Expired
Jun 20, 1998, 6:45 PM MDT
In force
47 min
Issued by
NWS Goodland, KS
Area
Whole counties

County Kit Carson County, CO

The radar

The Goodland radar (KGLD), 78 km from the middle of the area, began a volume at 00:03 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.

The nearest sounding before it

Denver, CO (KDNR), launched 12:00Z, 12.0 hours before the alert went out and 83 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 1998-06-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 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 1998-06-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -43 square meters per square second.19395878Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2018 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
-43 m²/s²
0-3 km storm-relative helicity
29 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KGLD 202358 RRA
SVRGLD
COC063-210045-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GOODLAND KS
558 PM MDT SAT JUN 20 1998

THE NATIONAL WEATHER SERVICE IN GOODLAND HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WESTERN AND CENTRAL KIT CARSON COUNTY IN EAST CENTRAL COLORADO

* UNTIL 645 PM MDT

* AT 556 PM MDT... GOODLAND DOPPLER RADAR INDICATED A SEVERE
  THUNDERSTORM 38 MILES EAST OF LIMON OR 6 MILES NORTHWEST OF
  SEIBERT MOVING SOUTHEAST AT 25 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  SEIBERT                                 AROUND 610 PM MDT
  VONA                                    AROUND 630 PM MDT
  9 MILES SOUTH OF VONA                   AROUND 640 PM MDT

DAMAGING WINDS AND LARGE HAIL ARE LIKELY. GO INSIDE A STURDY
BUILDING AND STAY AWAY FROM WINDOWS!

MATHEWSON/DDT

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 20, 2:18 PM MDT, 3 hours 40 minutes earlier.

Area forecast discussion, Jun 20, 2:18 PM MDT, 3 hours 40 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GOODLAND KS
218 PM MDT (318 PM CDT) SAT JUN 20 1998

...FORECAST CHALLENGES THIS CYCLE ARE NIGHTTIME THUNDERSTORMS CHANCES
AND AFTERNOON HIGHS...

SCORE ANOTHER ONE FOR THE ETA WHICH ONCE AGAIN HAS MADE THE NGM LOOK
SILLY IN TRYING TO FCST LOW LEVEL FEATURES IN THE LEE OF THE ROCKIES.
COLD FRONT PUSHED THRU AS PROGGED BY YDYS ETA...AND NELY UPSLOPE
FLOW HAS KEPT TEMPS ROUGHLY 10 WHOPPING DEGREES COOLER THAN OUR OLD
TRUSTY FWC GUIDANCE SUGGESTED.

LOOKING UPSTREAM IN 6.7 MICRON IMAGERY...A WELL-DEFINED SWIRL IS
LOCATED IN SERN UT MOVING ENE AT ABOUT 70KTS. RUC TIMES THIS ENERGY
INTO ERN CO BY 06Z. ETA PROGGED MEAN LAPSE RATES FROM 700-500 MB
WILL BE FAIRLY STEEP MAINLY IN FAR WRN AND SRN ZONES WHERE VALUES OF
8-9 DEGREEC C/KM WILL BE FOUND BY MIDNIGHT. GOOD VERTICAL WIND SHEAR
IS ALSO DEVELOPING AS NOSE OF 70KT 250 JET COMES INTO SE CO OVER
VEERING LOW-LEVEL WINDS. NOCTURNAL TIMING OF THE EVERGY IS
UNFAVORABLE THOUGH AS 850 INVERSION WILL BUILD IN RADIATIONAL
COOLING. STILL...SFC DEWPOINTS SHOULD BE BETWEEN 50 AND 55
DEGREES...AND HAVE OPTED TO INCLUDE 10-20 POPS FOR SRN/WRN CWA.
ELSEWHERE...EXPECT DEVELOPING MID CLOUDS.

HAVE ALSO INTRODUCED POPS FOR SUNDAY NIGHT OVER THE ENTIRE CWA...
WITH THE HIGHEST VALUES GOING TO THE NERN ZONES. REASONS ARE MOIST
UPSLOPE FLOW INTO THE FRONT RANGE AND DEVELOPING INSENTROPIC LIFT
BETWEEN 312 AND 316K. OVERUNNING SETS UP OVER BOUNDARY...WHICH BY
SUN AFTN SHOULD STILL BE LOCATED OVER SRN/WRN EXTREMES OF CWA.
AVN...WHICH LOOKS SIMILAR TO THE ETA...PROGS PRECIP TO LAST INTO
EARLY MONDAY OVER CWA...AND THIS DOESNT LOOK TOO BAD WHILE
CONSIDERING PROGGED SFC DEWPOINTS AT GLD NEAR 65 DEGREES. CONFIDENCE
ATTM IS LOW FOR THIS HOWEVER...BUT FUTURE SHIFTS SHOULD MONITOR THIS
SCENARIO FOR PSBL INCLUSION OF THUNDER MONDAY.

AS FOR HIGHS...WILL CONTINUE IN OPPOSITION TO WARM BIAS OF NGM FWC
CONSIDERING THAT COOL OUTFLOW WILL LIKELY REINFORCE SLY LOCATION OF
FRONT FOR MONDAY. RAINFALL COULD ALSO PUT A SHORT HOLD ON APPROACHING
HEAT WAVE.

.GLD...NONE
STAVISH

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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.