Alert archive / Colorado / Flash Flood Warnings in 1998

Flash Flood Warning 18, NWS Goodland, KS

July 29, 1998Kit Carson County, Yuma County, Colorado

NWS Goodland, KS issued this flash flood warning at Jul 29, 1998, 6:50 PM MDT for Kit Carson County, Yuma County, Colorado. It was in force for 4 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
Jul 29, 1998, 6:50 PM MDT (00:50 UTC)
Expired
Jul 29, 1998, 10:50 PM MDT
In force
4 hr
Issued by
NWS Goodland, KS
Area
Whole counties

Counties Kit Carson County, CO, Yuma County, CO

The radar

The Goodland radar (KGLD), 77 km from the middle of the area, began a volume at 00:51 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, 0.8 hours before the alert went out and 66 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 00:00Z on 1998-07-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 147 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 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 00:00Z on 1998-07-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -8 square meters per square second.193958Sfc1 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
147 J/kg
Mixed-layer CIN
-67 J/kg
Mixed-layer LCL
1563 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
-8 m²/s²
0-3 km storm-relative helicity
115 m²/s²
Significant tornado parameter
-0.0
Supercell composite
-0.4

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KGLD 300051
FFWGLD
COC063-125-300450-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE GOODLAND KS
650 PM MDT WED JUL 29 1998

THE NATIONAL WEATHER SERVICE IN GOODLAND HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHEASTERN KIT CARSON COUNTY IN EAST CENTRAL COLORADO
  SOUTHEASTERN YUMA COUNTY IN NORTHEASTERN COLORADO

* UNTIL 1050 PM MDT

* AT 645 PM MDT...LAW ENFORCEMENT OFFICIALS REPORTED WATER FLOWING
OVER SECTIONS OF HIGHWAY 385 NORTH OF BURLINGTON. DITCHES HAVE BEEN
FILLING UP QUICKLY AND MORE RAINFALL IS EXPECTED THROUGH LATE
EVENING. BONNY AND LANDSMAN CREEKS SHOULD RISE QUICKLY WITH THIS
HEAVY RAINFALL.

DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD!

MLC/KPL

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 Jul 29, 2:51 PM MDT, 3 hours 59 minutes earlier.

Area forecast discussion, Jul 29, 2:51 PM MDT, 3 hours 59 minutes before
AREA FORECAST DISCUSSION...UPDATE
NATIONAL WEATHER SERVICE GOODLAND KS
251 PM MDT (351 PM CDT) WED JUL 29 1998

FORECAST PROBLEMS WL BE CHC AND AMOUNT OF PCPN THRU THE PD. AM
RUNNING BEHIND DUE TO FRUITFALL PHONE COORDINATION. COORD WAS WITH
DDC AND HSI. HAVE RCVD ISOLATED VERY HEAVY RNFL AMOUNTS IN NE PTN OF
CWA THIS AFTN. SINCE HVY AMOUNTS ISOLD IN NATURE AND HAVE BEEN DRY
FOR A FEW DAYS...WL OPT TO NOT ISSUE A FFA ATTM...AND JUST PUT IN
LOCALLY HEAVY RNFL. WL UNDOUBTEDLY RECEIVE HVY RNFL BUT DO NOT FEEL
CONFIDENT ABT EXACT AREA OF CONCERN. NE PTN CWA WL BE ON TOP OF
LIST. WL TELL EVENING SHIFT TO MONITOR VERY CLOSELY.

MODELS NOT CATCHING EVERYTHING. NRN FRONTAL BNDRY HAS SAGGED OVR NRN
FRINGE OF CWA. THAT BNDRY PLUS SHEAR AXIS/SMALL VORT PUSHING IN FM
THE SW. GLD WSR-88D AND SFC OBS SHOWG ADDITIONAL DVLPMENT TO THE S
AND SW OF GLD...AND A LINE FROM NRN FRONT RANGE OF CO INTO EXTRM SW
PTN OF NE PNHANDLE. DVLPMENT CLOSE TO GLD IS PROBABLY DUE TO SRN
FRONTAL BNDRY THAT HAS BEEN PULLED NORTH DUE TO APRCHG STRONG S/W
FROM THE WEST.

ETA/NGM BLEND APPEARS TO BEST HANDLE THE SITN. NGM DOES BETTER AT
THE SFC AND INITD BEST WITH ETA DOING BETTER ON THE THERMAL FEATURES
AND MSTR FM 700 MB DOWN WHICH WAS COOLER AND MORE MOIST. NGM DID A
LTL BETTER WITH S/W FEATURES AND ETA WITH THE JET. AM CONCERNCED
TONIGHT THAT MODELS ARE NOT STRONG ENUF WITH APRCHG S/W AND SFC
BNDRY FM THE NW PER SATL AND SFC OBSERVATIONS. BLV LIFT WL BE
STRONGER TONIGHT THAN WHAT MODELS INDICATE.

BASICALLY WL GO WETTER THAN NGM MOS AND CLOSER TO FAN GUIDANCE THRU
PD...ESPECIALLY FOR THE NIGHTTIME HOURS. THIS WL BE DIURNALLY TRENDED
THRU FRI DUE TO LESS DYNAMICS DURG THE DAY THEN PCPN PICKING UP LATE
IN THE AFTERNOON WITH INCREASED DYNAMICS...MSTR CONVERGENCE...AND
WHATEVER HEATING TAKES PLACE. NGM DID NOT DO WELL IN A SMLR PCPN
SCENARIO LAST WEEK. ALL THIS MEANS UPSLOPE FLOW...CLDY SKIES...AREAS
OF FOG...MAX TEMPS COOLER THAN THE NGM MOS MAXES...AND MINS WARMER
THAN NGM MOS THRU THE PD.

.GLD...NONE.

BULLER

The office that day

Everything else NWS Goodland, KS issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 29, 6:57 PM MDTSevere Thunderstorm WarningGLDCheyenne48 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.