Alert archive / Colorado / Flash Flood Warnings in 2017

Flash Flood Warning 51, NWS Pueblo, CO

August 31, 2017Huerfano County, Las Animas County, Colorado

NWS Pueblo, CO issued this flash flood warning at Aug 31, 2017, 3:59 PM MDT for Huerfano County, Las Animas County, Colorado. It was in force for 2 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 31, 2017, 3:59 PM MDT (21:59 UTC)
Expired
Aug 31, 2017, 6:00 PM MDT
In force
2 hr
Issued by
NWS Pueblo, CO
Area
Storm-based polygon
Flood severity
None

Counties Huerfano County, CO, Las Animas County, CO

The radar

The Pueblo radar (KPUX), 127 km from the middle of the area, began a volume at 22:01 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 (KDEN), launched 12:00Z, 10.0 hours before the alert went out and 304 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 12:00Z on 2017-08-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Denver, CO at 12:00Z on 2017-08-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 40 square meters per square second.1939Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2491 m above ground
0-6 km bulk shear
14 kt
0-1 km storm-relative helicity
40 m²/s²
0-3 km storm-relative helicity
37 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

195 
WGUS55 KPUB 312159
FFWPUB
COC055-071-010000-
/O.NEW.KPUB.FF.W.0051.170831T2159Z-170901T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Pueblo CO
359 PM MDT THU AUG 31 2017

The National Weather Service in Pueblo has issued a

* Flash Flood Warning for...
  South central Huerfano County in southeastern Colorado...
  Western Las Animas County in southeastern Colorado...

* Until 600 PM MDT

* At 358 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...
  East Peak Burn Scar and surrounding locations.  

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

Move away from recently burned areas. Life-threatening flooding of
creeks, roads and normally dry arroyos is likely. The heavy rains 
will be capable of triggering rockslides, mudslides and debris flows 
in steep terrain, especially in and around these areas.

Please report flooding to your local law enforcement agency when you
can do so safely.

A Flash Flood Warning means that flooding is imminent or occurring.
If you are in the warned area move to higher ground immediately.
Residents living along streams and creeks should take immediate
precautions to protect life and property.

&&

LAT...LON 3755 10480 3737 10477 3735 10505 3748 10502

$$
1 follow-up statement
687 
WGUS75 KPUB 312256
FFSPUB

Flash Flood Statement
National Weather Service Pueblo CO
456 PM MDT THU AUG 31 2017

COC055-071-312306-
/O.CAN.KPUB.FF.W.0051.000000T0000Z-170901T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Huerfano CO-Las Animas CO-
456 PM MDT THU AUG 31 2017

...THE FLASH FLOOD WARNING FOR SOUTH CENTRAL HUERFANO AND WESTERN LAS
ANIMAS COUNTIES 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 3755 10480 3737 10477 3735 10505 3748 10502

$$

The office that day

Everything else NWS Pueblo, CO issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 31, 2:44 PM MDTSpecial Weather StatementPUBHuerfano91 min
Aug 31, 3:20 PM MDTSpecial Weather StatementPUBFremont55 min
Aug 31, 3:47 PM MDTSpecial Weather StatementPUBHuerfano88 min
Aug 31, 5:33 PM MDTSpecial Weather StatementPUBCuster27 min
Aug 31, 5:37 PM MDTSpecial Weather StatementPUBPueblo23 min
Aug 31, 5:59 PM MDTSpecial Weather StatementPUBPueblo46 min

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.