Alert archive / Colorado / Flash Flood Warnings in 1996

Flash Flood Warning 33, NWS Goodland, KS

September 17, 1996Yuma County, Colorado

NWS Goodland, KS issued this flash flood warning at Sep 17, 1996, 11:15 PM MDT for Yuma County, Colorado. It was in force for 5 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: Sep 17, 1996, 11:15 PM MDT (05:15 UTC)
Expired: Sep 18, 1996, 4:00 AM MDT
In force: 5 hr
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 05:18 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, 5.3 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1140 m above ground
0-6 km bulk shear: 54 kt
0-1 km storm-relative helicity: -22 m²/s²
0-3 km storm-relative helicity: -13 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KGLD 180515
FFWGLD
COC125-181020-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE GOODLAND KS
1115 PM MDT TUE SEP 17 1996

THE NATIONAL WEATHER SERVICE IN GOODLAND KS HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL 400 AM MDT
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN NORTHEAST COLORADO

   ...SOUTHEASTERN YUMA COUNTY
 
AT 1110 PM YUMA COUNTY LAW ENFORCEMENT OFFICIALS REPORTED TWO FEET
OF WATER OVER THE ROAD LEADING TO BOLNNY DAM... SO THE FLASH FLOOD
WARNING HAS BEEN EXTENDED UNTIL 4 AM.

DON'T DRIVE ACROSS FLOODED ROADS!  MOST FLASH FLOOD DEATHS OCCUR IN
AUTOMOBILES.

ENTWISTLE

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 Sep 17, 1:26 PM MDT, 9 hours 49 minutes earlier.

Area forecast discussion, Sep 17, 1:26 PM MDT, 9 hours 49 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GOODLAND KS
126 PM MDT (226 PM CDT) TUE SEP 17 1996

...FORECAST PROBLEM TODAY IS HEAVY RAINFALL POTENTIAL...

A SERIES OF STRONG VORT LOBES ROTATING AROUND THE MAIN GREAT BASIN
TROUGH WILL BRING ANOTHER ROUND OF WET WEATHER TO THE HIGH PLAINS.
ONLY SLOW EASTWARD PROGRESS IS FORECASTED BY THE MODELS WITH THIS
TROUGH AND WITH THE OMEGA BLOCK ENTRENCHED OVER THE MISSISSIPPI
VALLEY...WET EPISODES LOOK LIKELY THROUGH PACKAGE.

BEST MOISTURE CONVERGENCE TONIGHT IS PROGGED FOR CO COUNTIES AND
THIS SEEMS REASONABLE GIVEN THE POSITION OF THE FOG CLEARING LINE.
AS NEXT WAVE OF DYNAMICS SWINGS IN OVERNIGHT...RAIN SHOULD DEVELOP.
HEAVY RAINS MAY BE POSSIBLE ALONG CO/KS BORDERS WHERE 850/700 MB
THETA-E RIDGES ARE IN PLACE. AIR IS SOMEWHAT DRY ABOVE INVERSION AS
EVIDENCED BY DNR AND DDC SOUNDINGS AT 12Z...BUT AS MOISTURE MOVES IN
THIS DRY AIR SHOULD SERVE TO DESTABALIZE THE AIR MASS ABOVE THE
INVERSION. THEREFORE...SOME THUNDER IS POSSIBLE FOR ALL BUT ERN
COUNTIES OVERNIGHT.

INDIVIDUAL TIMING OF WAVES BY MODELS IS SOMEWHAT QUESTIONABLE IN
THESE TYPE OF PATTERNS...BUT SUGGESTIONS FROM WATER VAPOR INDICATE
THAT WE MAY GET A BREAK FOR PART OF WEDNESDAY...BEFORE THE NEXT
STRONGER WAVE COMES IN WEDNESDAY EVENING. THIS WAVE COUPLED WITH THE
INCOMING SURFACE FRONT AND COLDER AIR ALOFT SHOULD LEAD TO
THUNDERSTORMS AND HEAVY RAIN OVER MUCH OF THE AREA. QPF IN DC GOING
WITH 3+ INCHES FOR EXTREME SERN FA AND THIS MAY BE REASONABLE.

AS FRONT MOVES THROUGH ON THURSDAY. INSTABILITY SHOWERS WILL REMAIN
POSSIBLE.

WILL WAIT ONE MORE MODEL RUN BEFORE SUGGESTING FFA FOR ERN ZNS FOR
WED NIGHT. FFG RUNNING AROUND 3 INCHES FOR MOST OF FA ATTM.

FWC TEMPS GENERALLY FOLLOWED THOUGH UNDERCUT SOMEWHAT FOR THURSDAY
AS ETA SUGGESTS COOLER AIR THAN NGM/AVN AND SEEMS MORE REASONABLE.

GLD 052/063/046/063 7574  HLC 057/063/055/065 7776
CBK 054/063/048/065 7574  MCK 054/061/049/063 7774
TRB 056/069/052/068 6474  ITR 047/066/047/062 7563

BARKER

In the hours before

Local storm report, Sep 17, 7:54 PM MDT, 3 hours 21 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GOODLAND KS
754 PM MDT TUE SEP 17 1996

TIME(MDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0439 PM    19 S YUMA                 CO   60 MPH WIND GUST
09/17/96   YUMA

0410 PM    5 1/2 SW YUMA             CO   .75 INCH HAIL
09/17/96   YUMA

0500 PM    9 S YUMA                  CO   .88 INCH HAIL
09/17/96   YUMA

0530 PM    13 NNW VONA               CO   1 INCH HAIL
09/17/96   KIT CARSON

0530 PM    7 SW JOES                 CO   .75 INCH HAIL
09/17/96   YUMA

0530 PM    2 S YUMA                  CO   FLOODING
09/17/96   YUMA                           530 PM - 550 PM MDT 3-4
                                          INCHES WATER OVER HIGHWAY
                                          59

0530 PM    YUMA                      CO   FLOODING
09/17/96   YUMA                           530 PM - 550 PM MDT FLOOD
                                          WATERS IN TWO BUILDINGS

0550 PM    17 N VONA                 CO   .75 INCH HAIL
09/17/96   KIT CARSON

0550 PM    1 1/2 E YUMA              CO   FLOODING
09/17/96   YUMA                           5 INCHES OF WATER OVER
                                          HIGHWAY 34

0702 PM    VONA                      CO   1.25 INCH HAIL
09/17/96   KIT CARSON

RT/MC

Special weather statement, Sep 17, 9:39 PM MDT, 1 hour 36 minutes before

COZ090>092-KSZ001-002-013-014-027-028-041-042-180440-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GOODLAND KS
938 PM MDT (1038 PM CDT) TUE SEP 17 1996

...A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 4 AM MDT (5 AM
   CDT)...

SEVERE THUNDERSTORMS ARE POSSIBLE OVER PORTIONS OF NORTHEAST
COLORADO AND NORTHWEST KANSAS INTO THE EARLY MORNING HOURS. THESE
SEVERE THUNDERSTORMS ARE CAPABLE OF PRODUCING LARGE HAIL AND
DAMAGING WINDS ALONG WITH VERY HEAVY RAINFALL.

THE SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR EASTERN CHEYENNE...
KIT CARSON AND YUMA COUNTIES OF EASTERN COLORADO...AND
CHEYENNE...RAWLINS...SHERMAN...THOMAS...WALLACE...LOGAN...GREELEY
AND WICHITA COUNTIES OF NORTHWEST KANSAS UNTIL 4 AM MDT (5 AM CDT).
CITIES IN THE WATCH AREA INCLUDE GOODLAND...COLBY...BURLINGTON...
WRAY...CHEYENNE WELLS...ATWOOD...TRIBUNE AND LEOTI.

THE SEVERE THUNDERSTORM WATCH REPLACES THE TORNADO WATCH FOR EASTERN
COLORADO.

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55 MPH...
DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN.  FOR YOUR
PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS.

TURNER

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 17, 6:53 PM MDT	Severe Thunderstorm Warning	GLD	Kit Carson	62 min
Sep 17, 8:12 PM MDT	Severe Thunderstorm Warning	GLD	Kit Carson, Yuma	33 min
Sep 17, 8:17 PM MDT	Flash Flood Warning	GLD	Yuma	3 hr
Sep 17, 8:49 PM MDT	Severe Thunderstorm Warning	GLD	Kit Carson, Yuma	46 min

Nearby

Flash Flood Warnings in Colorado, 1996 Every flash flood warning in 1996

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.