Alert archive / Colorado / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 161, NWS Goodland, KS
NWS Goodland, KS issued this severe thunderstorm warning at Aug 9, 1998, 6:23 PM MDT for Cheyenne County, Colorado. It was in force for 62 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
- Aug 9, 1998, 6:23 PM MDT (00:23 UTC)
- Expired
- Aug 9, 1998, 7:25 PM MDT
- In force
- 62 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 00:24 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 9, 7:07 PM MDT | Hail 0.75 | Cheyenne Wells, CO | |
| Aug 9, 7:30 PM MDT | Thunderstorm Wind 70 | Cheyenne Wells, CO | Thunderstorm winds uprooted two 100 year old trees, and 80x14 Trailer flipped 5 miles north of Cheyenne Wells. 10 minutes later, winds associated with same Thunderstorm blew Motorhome over 10 miles north of Cheyenne Wells. |
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, 0.4 hours before the alert went out and 128 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.
- Mixed-layer CAPE
- 325 J/kg
- Mixed-layer CIN
- -57 J/kg
- Mixed-layer LCL
- 2136 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 14 m²/s²
- 0-3 km storm-relative helicity
- 73 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.2
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 Aug 9, 1:22 PM MDT, 5 hours 1 minute earlier.
Area forecast discussion, Aug 9, 1:22 PM MDT, 5 hours 1 minute before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GOODLAND KS
122 PM MDT (222 PM CDT) SUN AUG 9 1998
...TIMING THE UPCOMING CHANGES TO BE THE KEY THIS PACKAGE...
FAST-MOVING SHORTWAVE IN NWRN COLORADO PROGGED TO MOVE ALMOST
DUE EAST INTO NWRN CWA THIS EVENING. GOOD CAPES DEVELOPING BETWEEN
HERE AND AKO SHOULD HELP SUSTAIN CONVECTIVE PROCESS. ALTHOUGH SFC
TEMPS ARE MARGINAL FOR CU/TCU ALONG CO/KS BORDER...THERE APPEARS TO
BE ENOUGH MOMENTUM IN THIS WAVE TO CARRY TO KS BORDER AND BEYOND...
IN ADDITION...TSRA CLUSTER OR SMALL MCS IN EXTREME NERN/SWRN
NEBRASKA PANHANDLE COULD DEVELOP ALONG H7 TROF AND MOVE ESEWD ALONG
LOW LEVEL MOISTURE/THETA E AXIS INTO CWA AFTER 06Z. THESE FEATURES
WARRANT HOLDING ONTO GOING POPS OF 30 FROM PREVIOUS FCST.
MODELS SUPPORT A COOLER LAYER OF AIR SAGGING SWD BEHIND THIS WAVE
ON MONDAY AND EARLY TUESDAY TIME FRAME IN H85/H7 LAYER. WITH A SSWD
BUT SLOW-MOVING SURFACE RIDGE AXIS FROM MCK TO SOUTH OF GLD IN 12
TO 30 HOUR WINDOW ON BACKSIDE...QUESTION IS...HOW THICK AND
WIDESPREAD WILL THE H5/H7 MOISTURE LAYER WILL BE...AND TO WHAT EXTENT
AND DURATION NNELY/ENELY BOUNDARY FLOW IS SUSTAINED DURING THE DAY
MONDAY...IE A DEVELOPING BACKDOOR SFC FRONT IN HLC/MCK AREAS. HAVE
USED THE ETA TO DEPICT THIS SCENARIO AND ITS CORRESPONDING H85 TEMP
PROGS.
REALLY MY ONLY CONCERN THIS FCST IS WITH...POSSIBLY WARMER HIGH
AND LOW TEMPS THAN WHAT MY FORECAST ENTAILS. THAT IS...TAKING
THE ETA SOLUTION OVER FWC/NGM MOS. FEEL FAIRLY CONFIDENT THAT MUCH
OF THE AREA WILL HAVE AN ENELY SHIFTING TO A MORE SSELY BOUNDARY
LAYER FLOW IN EXTD PDS...SUCH THAT CONSIDERABLE CLOUDINESS AND -SHRA
ACTIVITY FROM SWRN USA TROPICAL SYSTEM SHOULD DEVELOP. ONLY QUESTION
HERE IS...WHEN WILL THIS MOISTURE DEPART REGION. IT APPEARS TO
REMAIN OVERHEAD UNTIL LATE THURSDAY OR MIDDAY FRIDAY.
.GLD...NONE
VOJTESAKIn the hours before
Local storm report, Aug 9, 5:38 PM MDT, 45 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GOODLAND KS
538 PM MDT SUN AUG 09 1998
TIME(MDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0536 PM 11 N 2 E YUMA CO 1.25 INCH HAIL
08/09/98 YUMALocal storm report, Aug 9, 5:38 PM MDT, 45 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GOODLAND KS
538 PM MDT SUN AUG 09 1998
TIME(MDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0536 PM 11 N 2 E YUMA CO 1.25 INCH HAIL
08/09/98 YUMALocal storm report, Aug 9, 5:39 PM MDT, 44 minutes before
PRELIMINARY LOCAL STORM REPORT...CORRECTED TIME
NATIONAL WEATHER SERVICE GOODLAND KS
539 PM MDT (639 PM CDT) SUN AUG 9 1998
TIME(MDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0529 PM 11 N 2 E YUMA CO 1.25 INCH HAIL
08/09/98 YUMA
MLCThe office that day
Everything else NWS Goodland, KS issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 9, 7:50 PM MDT | Severe Thunderstorm Warning | GLD | Sherman | 65 min |
| Aug 9, 6:16 PM MDT | Severe Thunderstorm Warning | GLD | Kit Carson | 64 min |
| Aug 9, 6:20 PM MDT | Severe Thunderstorm Warning | GLD | Yuma | 65 min |
| Aug 9, 6:46 PM MDT | Severe Thunderstorm Warning | GLD | Kit Carson | 64 min |
| Aug 9, 8:12 PM MDT | Severe Thunderstorm Warning | GLD | Cheyenne | 63 min |
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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.