Alert archive / Colorado / Flash Flood Warnings in 2018

Flash Flood Warning 39, NWS Goodland, KS

July 28, 2018Yuma County, Colorado

NWS Goodland, KS issued this flash flood warning at Jul 28, 2018, 7:00 PM MDT for Yuma County, Colorado. It was in force for 3 hr. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Jul 28, 2018, 7:00 PM MDT (01:00 UTC)
Expired
Jul 28, 2018, 9:32 PM MDT
In force
3 hr
Issued by
NWS Goodland, KS
Area
Storm-based polygon
Flood severity
None

County Yuma County, CO

The radar

The Goodland radar (KGLD), 121 km from the middle of the area, began a volume at 01:03 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

TimeReportWhereRemark
Jul 28, 7:20 PM MDTHEAVY RAIN 1.5Eckley, COREPORT OF 1.5 INCHES OF RAIN AND MARBLE SIZED HAIL IN ECKLEY IN ROUGHLY 45 MINUTES BY AN EM. TIME ESTIMATED BASED ON RADAR.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Denver, CO (KDEN), launched 00:00Z, 1.0 hours before the alert went out and 68 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 2018-07-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 863 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 2018-07-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 167 square meters per square second.1939587897Sfc1 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
863 J/kg
Mixed-layer CIN
-114 J/kg
Mixed-layer LCL
1825 m above ground
0-6 km bulk shear
49 kt
0-1 km storm-relative helicity
167 m²/s²
0-3 km storm-relative helicity
331 m²/s²
Significant tornado parameter
0.1
Supercell composite
6.4

Open this sounding in Storm Lab

The text

As transmitted.

895 
WGUS53 KGLD 290100
FFWGLD
COC125-290400-
/O.NEW.KGLD.FF.W.0039.180729T0100Z-180729T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Goodland KS
700 PM MDT SAT JUL 28 2018

The National Weather Service in Goodland has issued a

* Flash Flood Warning for...
  Northwestern Yuma County in northeastern Colorado...

* Until 1000 PM MDT.

* At 700 PM MDT, Doppler radar indicated thunderstorms producing
  heavy rain across the warned area. Flash flooding is expected to
  begin shortly.

* Some locations that will experience flooding include...
  Yuma and Eckley. 

LAT...LON 4034 10243 4005 10243 4005 10279 4034 10279

$$

JN
2 follow-up statements
276 
WGUS73 KGLD 290148
FFSGLD

Flash Flood Statement
National Weather Service Goodland KS
748 PM MDT SAT JUL 28 2018

COC125-290400-
/O.CON.KGLD.FF.W.0039.000000T0000Z-180729T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Yuma CO-
748 PM MDT SAT JUL 28 2018

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1000 PM MDT FOR
NORTHWESTERN YUMA COUNTY...

At 748 PM MDT, Doppler radar indicated thunderstorms producing heavy
rain across the warned area.  Flash flooding is expected to begin
shortly.

Some locations that will experience flooding include...
Yuma and Eckley. 

LAT...LON 4034 10243 4005 10243 4005 10279 4034 10279

$$

JN
577 
WGUS73 KGLD 290332
FFSGLD

Flash Flood Statement
National Weather Service Goodland KS
932 PM MDT SAT JUL 28 2018

COC125-290342-
/O.CAN.KGLD.FF.W.0039.000000T0000Z-180729T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Yuma CO-
932 PM MDT SAT JUL 28 2018

...THE FLASH FLOOD WARNING FOR NORTHWESTERN YUMA COUNTY IS
CANCELLED...

The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed any remaining road closures.

LAT...LON 4034 10243 4005 10243 4005 10279 4034 10279

$$

JN

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 28, 6:27 PM MDTSevere Thunderstorm WarningGLDKit Carson39 min
Jul 28, 6:35 PM MDTSpecial Weather StatementGLDYuma10 min
Jul 28, 6:49 PM MDTSevere Thunderstorm WarningGLDYuma41 min
Jul 28, 7:21 PM MDTSevere Thunderstorm WarningGLDYuma54 min
Jul 28, 7:26 PM MDTSevere Thunderstorm WarningGLDYuma55 min
Jul 28, 7:57 PM MDTSpecial Weather StatementGLDPhillips18 min
Jul 28, 7:58 PM MDTFlash Flood WarningGLDYuma103 min
Jul 29, 5:40 PM MDTTornado WarningGLDKit Carson35 min

Nearby

Flash Flood Warnings in Colorado, 2018Every flash flood warning in 2018

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.