Alert archive / Colorado / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 252, NWS Goodland, KS
NWS Goodland, KS issued this severe thunderstorm warning at Aug 28, 1999, 6:17 PM MDT for Yuma County, Colorado. It was in force for 48 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 28, 1999, 6:17 PM MDT (00:17 UTC)
- Expired
- Aug 28, 1999, 7:05 PM MDT
- In force
- 48 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 00:20 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 28, 6:36 PM MDT | Hail 1.25 | 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 28, 2:15 PM MDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Denver, CO (KDNR), launched 00:00Z, 0.3 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
- 26 J/kg
- Mixed-layer CIN
- -136 J/kg
- Mixed-layer LCL
- 1651 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- -14 m²/s²
- 0-3 km storm-relative helicity
- 38 m²/s²
- Significant tornado parameter
- -0.0
- Supercell composite
- -0.0
The text
As transmitted, in the capitals the NWS used until 2016.
489 WUUS1 KGLD 290018 RRA SVRGLD COC125-290105- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE GOODLAND KS 617 PM MDT SAT AUG 28 1999 THE NATIONAL WEATHER SERVICE IN GOODLAND HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... YUMA COUNTY IN NORTHEASTERN COLORADO * UNTIL 705 PM MDT * AT 617 PM MDT... GOODLAND DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 5 MILES SOUTH OF WRAY... MOVING NORTH AT 15 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... WRAY AROUND 630 PM MDT LAIRD AROUND 640 PM MDT HWY 385...8 MILES NORTH OF WRAY AROUND 655 PM MDT DAMAGING WINDS AND LARGE HAIL ARE LIKELY. GO INSIDE A STURDY BUILDING AND STAY AWAY FROM WINDOWS SVEN
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 28, 3:10 PM MDT, 3 hours 7 minutes earlier.
Area forecast discussion, Aug 28, 3:10 PM MDT, 3 hours 7 minutes before
AREA FORECAST DISCUSSION...CORRECTED FOR TYPOS NATIONAL WEATHER SERVICE GOODLAND KS 310 PM MDT (410 PM CDT) SAT AUG 28 1999 ...FORECAST PROBLEMS WILL BE CHC OF PCPN THRU PD FOLLOWED BY RNFL INTENSITY TONIGHT... LTL SHORT OF TIME DUE TO WATCH ALREADY BEING PUT OUT FOR WRN AND NRN PTN OF CWFA. BASED ON BETTER INITIAL ANALYSIS AND SIX HOUR TRENDS AS SEEN ON RADAR...SATL...AND SFC...WL PREFER THE ETA OVERALL. ETA IS CATCHING DPS BETTER FM SFC TO 700 MB ALONG WITH S/W DETAILS. MSTR CONV AND OMEGA FIELDS OF ETA ARE CORRESPONDING WELL TO ACTIVITY NOW OVR CO. VORT MAX OVR NRN WY WITH S/W EXTND SOUTH OF IT. ANOTHER VORT MAX PUSHING THRU CNTRL CO ATTM. MSTR IS PLENTIFUL PER SATL WATER VAPOR AND 850 MB UPR AIR ANAL AND SFC ANAL. GOOD MSTR CONV...7-5 OMEGA... 25H AGEO DIV...AND ISENTROPIC LIFT THRU THE NIGHT. SO WL BE PUTTING SCT TO NMRS TON. QUESTION THEN TURNS TO POSIBILITY OF FLOODING RAINS SINCE ANALYSIS OF PROFILER AND SOUNDINGS INDICATE SLOW MOVEMENT. NEW FFG IS HIGH ACROSS ENTIRE CWFA WITH 2.7 THE LOWEST AMOUNT ON THREE HOUR GUIDANCE. SINCE ETA AND QPFERD HAVE BACKED OFF A LTL FM PREV FCSTS AND WITH HIGH GUIDANCE WL PREFER NOT TO ISSUANCE A WATCH AND WL ONLY MENTION LCLLY HVY RNFL. ACTIVITY LOOKS TO MOVE OUT OF EAST SUN MRNG WITH WEST STABILIZED TIL AFTN BEHIND WAVE. WEAKER S/W PROGGED TO MOVE ACROSS AREA SUN AFTN AND NIGHT BUT TEMPS WL BE COOLER ALOFT WITH THIS ONE. MSTR REMAINING PLENTIFUL DUE TO SFC LOW RMNG IN SE CO AND SW TO W FLOW ALOFT. ISENTROPIC LIFT CONTS THRU SUN NIGHT WITH ANOTHER BATCH OF MSTR CONV AND OMEGA FM 700 TO 250 MB TO MOVE ACROSS AGAIN. INDICATIONS ARE THAT ERN CWA WL HAVE A BETTER SHOT WITH A PSBL MCS BASED ON 7-3 THICKNESS. SO WL AGAIN GO SCT TMRW NIGHT FOR ENTIRE CWA WITH ERN CWA HAVG HIEST POPS. ANOTHER WK S/W APRCHES WEST ON MON AFTN AND WL INCLUDE SLGT CHC. BASED ON DPS WL GO SLIGHTLY ABV NGM MOS FOR MINS. NGM MOS MAXES LOOK RSNBL BASED ON CLD COVER AND WND FIELD...BUT NGM HAS HAD TENDENCY TO HAVE BEEN TOO COOL ON MAXES RECENTLY. SO WL GO NR TO SLIGHTLY ABV NGM MOS FOR MAXES. S/WS...MSTR...AND BNDRIES ARND THRU EXTENDED WARRANT KEEPING CHC OF TSRA IN. .GLD...NONE. BULLER
In the hours before
Special weather statement, Aug 28, 1:51 PM MDT, 4 hours 26 minutes before
COZ090>092-NEZ079>081-282300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GOODLAND KS 151 PM MDT SAT AUG 28 1999 ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 7 PM MDT (8 PM CDT)... THE STORM PREDICTION CENTER HAS ISSUED A SEVERE THUNDERSTORM WATCH FOR A PORTION OF FAR EASTERN COLORADO AND A PORTION OF EXTREME SOUTHWEST NEBRASKA UNTIL 7 PM MDT (8 PM CDT). THE WATCH INCLUDES THE COUNTIES OF YUMA AND KIT CARSON IN COLORADO AND DUNDY... HITCHCOCK AND RED WILLOW IN NEBRASKA. THE COMBINATION OF A STRONG UPPER LEVEL DISTURBANCE WITH VERY WARM AND HUMID CONDITIONS WILL TRIGGER THUNDERSTORMS THROUGH THIS EVENING ACROSS THE WATCH AREA. LOOK FOR DAMAGING WINDS...LARGE HAIL AND TORRENTIAL RAINFALL WITH THE STRONGER STORMS. STAY TUNED TO NOAA WEATHER RADIO...OR YOUR FAVORITE COMMERCIAL SOURCE OF WEATHER INFORMATION FOR LATER STATEMENTS CONCERNING THE POSSIBILITY FOR SEVERE WEATHER AND FLOODING. SKIPPER
Special weather statement, Aug 28, 1:51 PM MDT, 4 hours 26 minutes before
COZ090>092-NEZ079>081-282300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GOODLAND KS 151 PM MDT SAT AUG 28 1999 ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 7 PM MDT (8 PM CDT)... THE STORM PREDICTION CENTER HAS ISSUED A SEVERE THUNDERSTORM WATCH FOR A PORTION OF FAR EASTERN COLORADO AND A PORTION OF EXTREME SOUTHWEST NEBRASKA UNTIL 7 PM MDT (8 PM CDT). THE WATCH INCLUDES THE COUNTIES OF YUMA AND KIT CARSON IN COLORADO AND DUNDY... HITCHCOCK AND RED WILLOW IN NEBRASKA. THE COMBINATION OF A STRONG UPPER LEVEL DISTURBANCE WITH VERY WARM AND HUMID CONDITIONS WILL TRIGGER THUNDERSTORMS THROUGH THIS EVENING ACROSS THE WATCH AREA. LOOK FOR DAMAGING WINDS...LARGE HAIL AND TORRENTIAL RAINFALL WITH THE STRONGER STORMS. STAY TUNED TO NOAA WEATHER RADIO...OR YOUR FAVORITE COMMERCIAL SOURCE OF WEATHER INFORMATION FOR LATER STATEMENTS CONCERNING THE POSSIBILITY FOR SEVERE WEATHER AND FLOODING. SKIPPER
Local storm report, Aug 28, 4:24 PM MDT, 1 hour 53 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GOODLAND KS
424 PM MDT SAT AUG 28 1999
TIME(MDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0340 PM 3 S JOES CO .75 INCH HAIL
08/28/99 YUMA
0340 PM 4 S JOES CO .75 INCH HAIL
08/28/99 YUMALocal storm report, Aug 28, 4:24 PM MDT, 1 hour 53 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GOODLAND KS
424 PM MDT SAT AUG 28 1999
TIME(MDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0340 PM 3 S JOES CO .75 INCH HAIL
08/28/99 YUMA
0340 PM 4 S JOES CO .75 INCH HAIL
08/28/99 YUMAThe office that day
Everything else NWS Goodland, KS issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 28, 6:28 PM MDT | Tornado Warning | GLD | Yuma | 32 min |
| Aug 28, 7:07 PM MDT | Severe Thunderstorm Warning | GLD | Kit Carson | 63 min |
Nearby
Severe Thunderstorm Warnings in Colorado, 1999Every 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.