Alert archive / Colorado / Flash Flood Warnings in 2017
Flash Flood Warning 49, NWS Pueblo, CO
NWS Pueblo, CO issued this flash flood warning at Aug 21, 2017, 5:18 PM MDT for Custer County, Fremont County, Saguache 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 outline as issued.
The facts
- Issued
- Aug 21, 2017, 5:18 PM MDT (23:18 UTC)
- Expired
- Aug 21, 2017, 8:15 PM MDT
- In force
- 3 hr
- Issued by
- NWS Pueblo, CO
- Area
- Storm-based polygon
- Flood severity
- None
Counties Custer County, CO, Fremont County, CO, Saguache County, CO
The radar
The Pueblo radar (KPUX), 139 km from the middle of the area, began a volume at 23:17 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
Grand Junction, CO (KGJT), launched 12:00Z, 11.3 hours before the alert went out and 254 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
- 3061 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- 27 m²/s²
- 0-3 km storm-relative helicity
- 11 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
776 WGUS55 KPUB 212318 FFWPUB COC027-043-109-220215- /O.NEW.KPUB.FF.W.0049.170821T2318Z-170822T0215Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED Flash Flood Warning National Weather Service Pueblo CO 518 PM MDT MON AUG 21 2017 The National Weather Service in Pueblo has issued a * Flash Flood Warning for... Southwestern Fremont County in central Colorado... Northwestern Custer County in southeastern Colorado... Northeastern Saguache County in central Colorado... * Until 815 PM MDT * At 515 PM MDT, Doppler radar indicated slow moving thunderstorms producing heavy rain moving over the western half of the Hayden Pass burn scar. Flash flooding is expected to begin shortly. * Flash flooding will remain over mainly rural areas of southwestern Fremont...northwestern Custer and northeastern Saguache Counties. Excessive rainfall over the burn scar will result in debris flow. The debris flow can consist of rock, mud, vegetation and other loose materials. PRECAUTIONARY/PREPAREDNESS ACTIONS... Move away from recently burned areas. Life-threatening flooding of creeks, roads and normally dry arroyos is likely. The heavy rains will likely trigger rockslides, mudslides and debris flows in steep terrain, especially in and around these areas. && LAT...LON 3835 10571 3825 10572 3827 10585 3834 10585 $$ 28
3 follow-up statements
182 WGUS75 KPUB 212331 FFSPUB Flash Flood Statement National Weather Service Pueblo CO 531 PM MDT MON AUG 21 2017 COC027-043-109-220215- /O.CON.KPUB.FF.W.0049.000000T0000Z-170822T0215Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Fremont CO-Custer CO-Saguache CO- 531 PM MDT MON AUG 21 2017 ...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 815 PM MDT FOR SOUTHWESTERN FREMONT...NORTHWESTERN CUSTER AND NORTHEASTERN SAGUACHE COUNTIES... At 530 PM MDT, Doppler radar indicated thunderstorms producing heavy rain moving over western portions of the Hayden Pass burn scar. Flash flooding is expected. Excessive rainfall over the burn scar will result in debris flow. The debris flow can consist of rock, mud, vegetation and other loose materials. Flash flooding will remain over mainly rural areas of southwestern Fremont...northwestern Custer and northeastern Saguache Counties. PRECAUTIONARY/PREPAREDNESS ACTIONS... Move away from recently burned areas. Life-threatening flooding of creeks, roads and normally dry arroyos is likely. The heavy rains will likely trigger rockslides, mudslides and debris flows in steep terrain, especially in and around these areas. && LAT...LON 3835 10571 3825 10572 3827 10585 3834 10585 $$ 28
344 WGUS75 KPUB 220018 FFSPUB Flash Flood Statement National Weather Service Pueblo CO 618 PM MDT MON AUG 21 2017 COC027-043-109-220215- /O.CON.KPUB.FF.W.0049.000000T0000Z-170822T0215Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Fremont CO-Custer CO-Saguache CO- 618 PM MDT MON AUG 21 2017 ...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 815 PM MDT FOR SOUTHWESTERN FREMONT...NORTHWESTERN CUSTER AND NORTHEASTERN SAGUACHE COUNTIES... At 616 PM MDT, Doppler radar indicated thunderstorms producing generally light rain across the Hayden Pass burn scar. However, heavy rain earlier may be causing flash flooding over western portions of the burn scar. Excessive rainfall over the burn scar will result in debris flow. The debris flow can consist of rock, mud, vegetation and other loose materials. Flash flooding will remain over mainly rural areas of southwestern Fremont...northwestern Custer and northeastern Saguache Counties. PRECAUTIONARY/PREPAREDNESS ACTIONS... Move away from recently burned areas. Life-threatening flooding of creeks, roads and normally dry arroyos is likely. The heavy rains will likely trigger rockslides, mudslides and debris flows in steep terrain, especially in and around these areas. && LAT...LON 3835 10571 3825 10572 3827 10585 3834 10585 $$ 28
494 WGUS75 KPUB 220043 FFSPUB Flash Flood Statement National Weather Service Pueblo CO 643 PM MDT MON AUG 21 2017 COC027-043-109-220052- /O.CAN.KPUB.FF.W.0049.000000T0000Z-170822T0215Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Fremont CO-Custer CO-Saguache CO- 643 PM MDT MON AUG 21 2017 ...THE FLASH FLOOD WARNING FOR SOUTHWESTERN FREMONT...NORTHWESTERN CUSTER AND NORTHEASTERN SAGUACHE COUNTIES IS CANCELLED... The heavy rain has ended on the Hayden Pass burn scar. There will continue to be some light rain in the area through at least 730 pm, but flooding is no longer expected to pose a threat. Please continue to heed any remaining road closures. LAT...LON 3835 10571 3825 10572 3827 10585 3834 10585 $$ 28
The office that day
Everything else NWS Pueblo, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 20, 6:20 PM MDT | Special Weather Statement | PUB | Pueblo | 40 min |
| Aug 20, 7:04 PM MDT | Special Weather Statement | PUB | Pueblo | 41 min |
| Aug 21, 4:09 PM MDT | Areal Flood Advisory | PUB | Fremont | 3 hr |
| Aug 21, 4:26 PM MDT | Special Weather Statement | PUB | Saguache | 34 min |
| Aug 21, 4:42 PM MDT | Special Weather Statement | PUB | Fremont | 33 min |
| Aug 21, 5:04 PM MDT | Flash Flood Warning | PUB | Custer, Pueblo | 3 hr |
Nearby
Flash Flood Warnings in Colorado, 2017Every flash flood warning in 2017
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.