Alert archive / Colorado / Flash Flood Warnings in 1998
Flash Flood Warning 20, NWS Goodland, KS
NWS Goodland, KS issued this flash flood warning at Aug 1, 1998, 7:40 PM MDT for Cheyenne County, Colorado. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Aug 1, 1998, 7:40 PM MDT (01:40 UTC)
- Expired
- Aug 1, 1998, 10:40 PM MDT
- In force
- 3 hr
- 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 01:44 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 00:00Z, 1.7 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1720 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 13 m²/s²
- 0-3 km storm-relative helicity
- -24 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 020139 FFWGLD COC017-020440- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE GOODLAND KS 740 PM MDT SAT AUG 1 1998 THE NATIONAL WEATHER SERVICE IN GOODLAND HAS ISSUED A * FLASH FLOOD WARNING FOR... EASTERN CHEYENNE COUNTY COLORADO IN EAST CENTRAL COLORADO * UNTIL 1040 PM MDT * AT 730 PM MDT...LAW ENFORCEMENT OFFICIALS REPORTED FLOODING AROUND AND EAST OF CHEYENNE WELLS. HIGHWAYS ARE BECOMING INUNDATED AND DITCHES ARE FILLING QUICKLY. * WATER OVER ROADS AND HIGHWAYS EAST OF CHEYENNE WELLS CAN BE EXPECTED THROUGH 1030 PM MDT. THIS IS A VERY DANGEROUS SITUATION. DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD! THEDE &
What forecasters said that day
The local office's own words before this flash flood 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 flash flood warning went out at Aug 1, 2:09 PM MDT, 5 hours 31 minutes earlier.
Area forecast discussion, Aug 1, 2:09 PM MDT, 5 hours 31 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GOODLAND KS 209 PM MDT (309 PM CDT) SAT AUG 1 1998 ...LOTS OF CHALLENGES THIS FORECAST PACKAGE... NONE OF THE MODELS DID ESPECIALLY WELL AT THE SFC...HOWEVER MM5 AND RUC CLOSEST TO REALITY. ETA DOES COME INTO MORE AGREEMENT WITH MM5 IN LATER PERIODS. ETA WAS ALSO ONLY MODELS THAT REALLY CAUGHT 5H LOW OVER SW KS AT 12Z. .SHORT TERM... CONCERNS CENTER ON POTENTIAL FOR SEVERE WEATHER OVER NW ZONES AND POSSIBLE FLOODING EAST. OVER THE WEST...ATMOSPHERE OVER ERN PLAINS OF CO HAVE BECOME QUITE UNSTABLE WITH DERIVED CAPES OF 2500-3000 J/KG ALONG WITH SFC DEWPOINTS IN THE 60S IN UPSLOPE FLOW. WV IMAGERY SHOWING S/W AND ASSOCIATED JET STREAK MOVING THROUGH CO ATTM AND WITH LEE TROF PROGGED TO DEEPEN...RESULTING IN INCREASING LOW LEVEL CONVERGENCE...EXPECT THUNDERSTORM ACTIVITY TO BECOME MORE WIDESPREAD THIS EVENING. ALL SAID..CANNOT ARGUE WITH SPC ON WATCH FOR NERN CO. RR QUAD OF MID TO UPPER LEVEL JET TO SLIDE INTO NW KS OVERNIGHT ENHANCING LIFT OVER EASTERN SECTIONS OF FA WHERE SFC BOUNDARY IS EXPECTED TO LIFT INTO THIS AREA LATER ON. 70 DEWPOINTS WILL ADVECT FURTHER INTO THE FA IN SERLY FLOW. ATMOSPHERE TO BE MORE STABLE WITH CAPES OF 1000-1500 J/KG. THE BIG CONCERN IS THE POTENTIAL FOR VERY HEAVY RAINS AS PW/S IN EXCESS OF 1 INCH. MINOR FLOODING IS ALREADY OCCURING OVER DECATUR COUNTY THIS AFTERNOON ON SAPPA CREEK...AND ANY ADDITIONAL RAINFALL WILL ONLY ADD TO THE PROBLEMS THERE. THE AFOREMENTIONED WEAK S/W OVER SW KS MAY START THE ACTIVITY THIS EVENING...BUT BEST BET IS LATE TONIGHT WITH APPROACH OF MAIN SYSTEM. WILL HOLD OFF ON ISSUING FLASH OR FLOOD WATCH ATTM AS THE HEAVIEST RAINS SHOULD OCCUR LATE. .LONG TERM... 5H TROF MOVES INTO THE NRN PLAINS SUNDAY WITH A NUMBER OF WEAK IMPULSES SWINGING THROUGH THE BASE...BUT TIMING OF THESE FEATURES UNCERTAIN. THIS WILL KEEP A POTENTIAL FOR CONVECTIVE ACTIVITY GOING...BUT WITH DRIER AIR MOVING IN FROM THE WEST HAVE KEPT POPS LOW. SFC HIGH TO START PUSHING COOLER AIR INTO THE REGION SUNDAY NIGHT WHICH SHOULD TRIGGER SHOWERS AND THUNDERSTORMS ONCE AGAIN. ETA 850-700 THICKNESS ANALYSIS SUGGESTS FRONT MAY NOT QUITE MAKE IT THROUGH SRN FA...AND HAVE GENERALLY KEPT TEMPS WARMER THERE. OTHERWISE...FWC/FAN NUMBERS ACCEPTED FOR THIS PACKAGE. .GLD...NONE. TURNER
In the hours before
Special weather statement, Aug 1, 6:47 PM MDT, 53 minutes before
COZ090-091-020125- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GOODLAND KS 647 PM MDT SAT AUG 1 1998 ...THE SEVERE THUNDERSTORM WATCH WILL BE ALLOWED TO EXPIRE AT 7 PM... A LINE OF THUNDERSTORMS ARE MOVING OUT OF FAR EASTERN COLORADO AND INTO NORTHWEST KANSAS THIS EVENING. THE THREAT FOR SEVERE WEATHER WILL BE OVER FOR YUMA AND KIT CARSON COUNTIES AFTER 7 PM MDT. A FEW SHOWERS OR THUNDERSTORMS ARE STILL POSSIBLE FOR THE REST OF THE EVENING. TUNE IN NOAA WEATHER RADIO OR YOUR LOCAL RADIO OR TV STATION FOR THE LATEST WEATHER INFORMATION. KPL
The office that day
Everything else NWS Goodland, KS issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 1, 7:03 PM MDT | Severe Thunderstorm Warning | GLD | Cheyenne | 32 min |
| Aug 1, 7:33 PM MDT | Severe Thunderstorm Warning | GLD | Cheyenne | 32 min |
Nearby
Flash Flood Warnings in Colorado, 1998Every flash flood 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.