Alert archive / Colorado / Flash Flood Warnings in 2020

Flash Flood Warning 49, NWS Pueblo, CO

July 30, 2020Custer County, Pueblo County, Colorado

NWS Pueblo, CO issued this flash flood warning at Jul 30, 2020, 8:41 PM MDT for Custer County, Pueblo 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: Jul 30, 2020, 8:41 PM MDT (02:41 UTC)
Expired: Jul 30, 2020, 11:45 PM MDT
In force: 3 hr
Issued by: NWS Pueblo, CO
Area: Storm-based polygon
Flood severity: None

Counties Custer County, CO, Pueblo County, CO

The radar

The Pueblo radar (KPUX), 91 km from the middle of the area, began a volume at 02:44 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, 2.7 hours before the alert went out and 253 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: 248 J/kg
Mixed-layer CIN: -118 J/kg
Mixed-layer LCL: 1584 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 63 m²/s²
0-3 km storm-relative helicity: 154 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

As transmitted.

222 
WGUS55 KPUB 310241
FFWPUB
COC027-101-310545-
/O.NEW.KPUB.FF.W.0049.200731T0241Z-200731T0545Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Pueblo CO
Issued by National Weather Service Goodland KS
841 PM MDT Thu Jul 30 2020

The National Weather Service in Pueblo has issued a

* Flash Flood Warning for...
  East central Custer County in southeastern Colorado...
  West central Pueblo County in southeastern Colorado...

* Until 1145 PM MDT.

* At 841 PM MDT, Doppler radar indicated thunderstorms producing
  heavy rain across the warned area. Flash flooding is expected to
  begin shortly.

* Flash flooding will remain over mainly rural areas of east central
  Custer and west central Pueblo Counties.

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 3810 10526 3813 10526 3821 10510 3823 10501
      3813 10498 3808 10508

$$

DDT

3 follow-up statements

367 
WGUS75 KPUB 310256
FFSPUB

Flash Flood Statement
National Weather Service Pueblo CO
Issued by National Weather Service Goodland KS
856 PM MDT Thu Jul 30 2020

COC027-101-310545-
/O.CON.KPUB.FF.W.0049.000000T0000Z-200731T0545Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Custer CO-Pueblo CO-
856 PM MDT Thu Jul 30 2020

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1145 PM MDT FOR
EAST CENTRAL CUSTER AND WEST CENTRAL PUEBLO COUNTIES...

At 853 PM MDT, Doppler radar indicated thunderstorms producing heavy
rain across the warned area.  Flash flooding is expected to begin
shortly.

Flash flooding will remain over mainly rural areas of east central
Custer and west central Pueblo Counties.

Additional rainfall amounts of three quarters to one inch in fifteen 
minutes are possible in the warned area.

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.

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 3810 10526 3813 10526 3821 10510 3823 10501
      3813 10498 3808 10508

$$

DDT

104 
WGUS75 KPUB 310322
FFSPUB

Flash Flood Statement
National Weather Service Pueblo CO
Issued by National Weather Service Goodland KS
922 PM MDT Thu Jul 30 2020

COC027-101-310545-
/O.CON.KPUB.FF.W.0049.000000T0000Z-200731T0545Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Custer CO-Pueblo CO-
922 PM MDT Thu Jul 30 2020

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1145 PM MDT FOR
EAST CENTRAL CUSTER AND WEST CENTRAL PUEBLO COUNTIES...

At 919 PM MDT, gauge reports indicated that one half to one inch of 
rain fell over the burn scar area.  Little if any additional 
rainfall is expected for the remainder of the evening. Flash 
flooding is expected to begin shortly.

Flash flooding will remain over mainly rural areas of east central
Custer and west central Pueblo Counties.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 3810 10526 3813 10526 3821 10510 3823 10501
      3813 10498 3808 10508

$$

DDT

824 
WGUS75 KPUB 310536
FFSPUB

Flash Flood Statement
National Weather Service Pueblo CO
1136 PM MDT Thu Jul 30 2020

COC027-101-310546-
/O.EXP.KPUB.FF.W.0049.000000T0000Z-200731T0545Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Custer CO-Pueblo CO-
1136 PM MDT Thu Jul 30 2020

...THE FLASH FLOOD WARNING FOR EAST CENTRAL CUSTER AND WEST CENTRAL
PUEBLO COUNTIES WILL EXPIRE AT 1145 PM MDT...

Flood waters have receded. Flooding is no longer expected to pose a
threat. Please continue to heed any remaining road closures.

LAT...LON 3810 10526 3813 10526 3821 10510 3823 10501
      3813 10498 3808 10508

$$

Hodanish

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 30, 6:05 PM MDT	Special Weather Statement	PUB	Pueblo	25 min
Jul 30, 6:16 PM MDT	Severe Thunderstorm Warning	PUB	Pueblo	29 min
Jul 30, 6:38 PM MDT	Severe Thunderstorm Warning	PUB	Huerfano, Pueblo	22 min
Jul 30, 7:46 PM MDT	Special Weather Statement	PUB	Las Animas	29 min
Jul 30, 7:50 PM MDT	Special Weather Statement	PUB	Pueblo	25 min
Jul 30, 8:08 PM MDT	Severe Thunderstorm Warning	PUB	Custer, Fremont, Huerfano, Pueblo	10 min
Jul 30, 8:17 PM MDT	Severe Thunderstorm Warning	PUB	Custer, Fremont, Pueblo	28 min
Jul 30, 9:25 PM MDT	Special Weather Statement	PUB	Huerfano	35 min
Jul 30, 9:55 PM MDT	Special Weather Statement	PUB	Huerfano	35 min
Jul 31, 3:44 PM MDT	Special Weather Statement	PUB	Custer	46 min
Jul 31, 4:14 PM MDT	Special Weather Statement	PUB	Huerfano	31 min
Jul 31, 4:29 PM MDT	Flash Flood Warning Considerable damage threat	PUB	Costilla, Huerfano	3 hr
Jul 31, 4:49 PM MDT	Special Weather Statement	PUB	Huerfano	26 min
Jul 31, 4:58 PM MDT	Special Weather Statement	PUB	Fremont	32 min

Nearby

Flash Flood Warnings in Colorado, 2020 Every flash flood warning in 2020

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.