Alert archive / Colorado / Flash Flood Warnings in 2021
Flash Flood Warning 37, NWS Goodland, KS
NWS Goodland, KS issued this flash flood warning at Aug 19, 2021, 7:50 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 outline as issued.
The facts
- Issued
- Aug 19, 2021, 7:50 PM MDT (01:50 UTC)
- Expired
- Aug 20, 2021, 12:28 AM MDT
- In force
- 5 hr
- Issued by
- NWS Goodland, KS
- Area
- Storm-based polygon
- Flood severity
- None
County Yuma County, CO
The radar
The Goodland radar (KGLD), 117 km from the middle of the area, began a volume at 01:51 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, 1.8 hours before the alert went out and 99 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
- 56 J/kg
- Mixed-layer CIN
- -210 J/kg
- Mixed-layer LCL
- 1497 m above ground
- 0-6 km bulk shear
- 52 kt
- 0-1 km storm-relative helicity
- 52 m²/s²
- 0-3 km storm-relative helicity
- 222 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.0
The text
As transmitted.
384
WGUS53 KGLD 200150
FFWGLD
COC125-200645-
/O.NEW.KGLD.FF.W.0037.210820T0150Z-210820T0645Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Goodland KS
750 PM MDT Thu Aug 19 2021
The National Weather Service in Goodland has issued a
* Flash Flood Warning for...
Northeastern Yuma County in northeastern Colorado...
* Until 1245 AM MDT.
* At 750 PM MDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 2 and 5 inches of rain
have fallen. Flash flooding is ongoing or expected to begin
shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar.
IMPACT...Flash flooding of small creeks and streams, urban
areas, highways, streets and underpasses as well as
other poor drainage and low-lying areas.
* Some locations that will experience flash flooding include...
Wauneta and Alvin.
Very heavy rain has fallen across eastern Phillips county. Some of
this runoff may drain into northeast Yuma county, causing a rapid
rise in water levels
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
&&
LAT...LON 4029 10205 4021 10249 4044 10251 4044 10205
FLASH FLOOD...RADAR INDICATED
$$
JRM3 follow-up statements
438
WGUS73 KGLD 200342
FFSGLD
Flash Flood Statement
National Weather Service Goodland KS
942 PM MDT Thu Aug 19 2021
COC125-200645-
/O.CON.KGLD.FF.W.0037.000000T0000Z-210820T0645Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Yuma CO-
942 PM MDT Thu Aug 19 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1245 AM MDT FRIDAY
FOR NORTHEASTERN YUMA COUNTY...
At 942 PM MDT, Doppler radar indicated thunderstorms producing heavy
rain across the warned area. Between 2 and 6 inches of rain have
fallen. Flash flooding is ongoing or expected to begin shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar.
IMPACT...Flash flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other poor
drainage and low-lying areas.
Some locations that will experience flash flooding include...
Wauneta and Alvin.
Very heavy rain has fallen across eastern Phillips county. Some of
this runoff may drain into northeast Yuma county, causing a rapid
rise in water levels. Be especially cautious along the Frenchman and
Patent creek in northeast Yuma county.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
&&
LAT...LON 4029 10205 4021 10249 4044 10251 4044 10205
FLASH FLOOD...RADAR INDICATED
$$
JRM691
WGUS73 KGLD 200419
FFSGLD
Flash Flood Statement
National Weather Service Goodland KS
1019 PM MDT Thu Aug 19 2021
COC125-200645-
/O.CON.KGLD.FF.W.0037.000000T0000Z-210820T0645Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Yuma CO-
1019 PM MDT Thu Aug 19 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1245 AM MDT FRIDAY
FOR NORTHEASTERN YUMA COUNTY...
At 1019 PM MDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 1 and 3 inches of rain
have fallen. Flash flooding is ongoing or expected to begin shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar.
IMPACT...Flash flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other poor
drainage and low-lying areas.
Some locations that will experience flash flooding include...
Wauneta and Alvin.
This includes the following highways...
Highway 385 between mile markers 257 and 269.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
In hilly terrain there are hundreds of low water crossings which are
potentially dangerous in heavy rain. Do not attempt to cross flooded
roads. Find an alternate route.
&&
LAT...LON 4029 10205 4021 10249 4044 10251 4044 10205
FLASH FLOOD...RADAR INDICATED
$$
Vincent444 WGUS73 KGLD 200628 FFSGLD Flash Flood Statement National Weather Service Goodland KS 1228 AM MDT Fri Aug 20 2021 COC125-200638- /O.CAN.KGLD.FF.W.0037.000000T0000Z-210820T0645Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Yuma CO- 1228 AM MDT Fri Aug 20 2021 ...FLASH FLOOD WARNING IS CANCELLED FOR NORTHEASTERN YUMA COUNTY... The heavy rain has ended. Flooding is no longer expected to pose a threat. Please continue to heed remaining road closures. LAT...LON 4029 10205 4021 10249 4044 10251 4044 10205 $$ MRC/JN
The office that day
Everything else NWS Goodland, KS issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 19, 6:28 PM MDT | Special Weather Statement | GLD | Phillips | 47 min |
| Aug 19, 6:31 PM MDT | Special Weather Statement | GLD | Yuma | 44 min |
| Aug 19, 6:46 PM MDT | Severe Thunderstorm Warning | GLD | Yuma | 44 min |
| Aug 19, 7:17 PM MDT | Special Weather Statement | GLD | Phillips | 28 min |
| Aug 19, 7:31 PM MDT | Severe Thunderstorm Warning | GLD | Yuma | 59 min |
| Aug 19, 7:36 PM MDT | Tornado Warning | GLD | Yuma | 24 min |
| Aug 19, 8:08 PM MDT | Tornado Warning | GLD | Yuma | 22 min |
| Aug 19, 8:44 PM MDT | Severe Thunderstorm Warning | GLD | Yuma | 31 min |
| Aug 19, 9:14 PM MDT | Severe Thunderstorm Warning | GLD | Yuma | 46 min |
| Aug 19, 9:49 PM MDT | Special Weather Statement | GLD | Yuma | 26 min |
| Aug 19, 10:48 PM MDT | Special Weather Statement | GLD | Phillips | 42 min |
| Aug 19, 10:51 PM MDT | Special Weather Statement | GLD | Yuma | 39 min |
| Aug 20, 12:31 AM MDT | Areal Flood Warning | GLD | Yuma | 6 hr |
| Aug 20, 5:40 AM MDT | Special Weather Statement | GLD | Phillips | 35 min |
Nearby
Flash Flood Warnings in Colorado, 2021Every flash flood warning in 2021
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.