Alert archive / Colorado / Tornado Warnings in 1999
Tornado Warning 27, NWS Goodland, KS
NWS Goodland, KS issued this tornado warning at Aug 10, 1999, 7:20 PM MDT for Yuma 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
- Aug 10, 1999, 7:20 PM MDT (01:20 UTC)
- Expired
- Aug 10, 1999, 8:10 PM MDT
- In force
- 50 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 01:21 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 10, 7:45 PM MDT | Hail 1.75 | Wray, 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Aug 10, 4:00 PM MDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Denver, CO (KDNR), launched 00:00Z, 1.3 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1419 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- -17 m²/s²
- 0-3 km storm-relative helicity
- 40 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KGLD 110122 RRA TORGLD COC125-110210- BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE GOODLAND KS 720 PM MDT TUE AUG 10 1999 THE NATIONAL WEATHER SERVICE IN GOODLAND HAS ISSUED A * TORNADO WARNING FOR... NORTHERN YUMA COUNTY IN NORTHEASTERN COLORADO * UNTIL 810 PM MDT * AT 718 PM MDT... GOODLAND DOPPLER RADAR AND LAW ENFORCEMENT PERSONNEL INDICATED A DEVELOPING TORNADO 15 MILES NORTH OF WRAY...MOVING NORTHEAST AT 25 MPH. * THE TORNADO IS EXPECTED TO AFFECT... RURAL RESIDENTS AND MOTORISTS IN THE WARNED AREA GO TO THE BASEMENT OR A SMALL INTERIOR ROOM ON THE LOWEST FLOOR! BULLER
What forecasters said that day
The local office's own words before this tornado 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 tornado warning went out at Aug 10, 4:44 PM MDT, 2 hours 36 minutes earlier.
Area forecast discussion, Aug 10, 4:44 PM MDT, 2 hours 36 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GOODLAND KS 440 PM MDT (540 PM CDT) TUE AUG 10 1999 UPDATED LATEST ZONES FOR FIRST PERIOD TO REFLECT ISOLATED SEVERE CONVECTION BREAKING OUT IN PARTS OF CWA. ALSO UPDATED TO INCLUDE SEVERE THUNDERSTORM WATCH FOR PARTS OF CWA VALID UNTIL 9 PM MDT (10 PM CDT). STRONGEST CONVECTION SEEMS TO HAVE FORMED NEAR THETA E RIDGE LINE ADDED BY AFTERNOON HEATING. AS VORT MAX APPROACHES TONIGHT FROM COLORADO MORE SCATTERED CONVECTION CAN BE EXPECTED THROUGH THE OVERNIGHT HOURS WITH BEST CHANCES OF CONVECTION OVER NORTHERN 2/3 OF CWA. .GLD...NONE. LAMMERS
In the hours before
Local storm report, Aug 10, 5:21 PM MDT, 1 hour 59 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GOODLAND KS
521 PM MDT TUE AUG 10 1999
TIME(MDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0510 PM 2 N CLARKVILLE CO .75 INCH HAIL
08/10/99 YUMALocal storm report, Aug 10, 5:21 PM MDT, 1 hour 59 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GOODLAND KS
521 PM MDT TUE AUG 10 1999
TIME(MDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0510 PM 2 N CLARKVILLE CO .75 INCH HAIL
08/10/99 YUMALocal storm report, Aug 10, 5:34 PM MDT, 1 hour 46 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GOODLAND KS
534 PM MDT TUE AUG 10 1999
TIME(MDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0530 PM 2 NW YUMA CO 1.5 INCH HAIL
08/10/99 YUMALocal storm report, Aug 10, 5:34 PM MDT, 1 hour 46 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GOODLAND KS
534 PM MDT TUE AUG 10 1999
TIME(MDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0530 PM 2 NW YUMA CO 1.5 INCH HAIL
08/10/99 YUMALocal storm report, Aug 10, 5:50 PM MDT, 1 hour 30 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GOODLAND KS
550 PM MDT TUE AUG 10 1999
TIME(MDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0547 PM 2 W ECKLEY CO 1.75 INCH HAIL
08/10/99 YUMALocal storm report, Aug 10, 5:50 PM MDT, 1 hour 30 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GOODLAND KS
550 PM MDT TUE AUG 10 1999
TIME(MDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0547 PM 2 W ECKLEY CO 1.75 INCH HAIL
08/10/99 YUMAThe office that day
Everything else NWS Goodland, KS issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 10, 6:41 PM MDT | Severe Thunderstorm Warning | GLD | Yuma | 34 min |
Nearby
Tornado Warnings in Colorado, 1999Every tornado warning in 1999Tornadoes 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.