A closed low propagated from SW CONUS and rapidly intensified over the southeast Colorado plains. A combination of strong lift due to the rapidly intensifying cyclone and orographic lift created heavy snow over the mountains. Since this was a late spring system with origins from the Pacific, the lower elevations were warm enough for heavy rainfall that ended up causing some flooding issues along the Fountain Creek in El Paso County and Pueblo County.

Flash Flood in EL PASO, COLORADO
From 11-MAY-23 06:56:00 to 11-MAY-23 09:56:00 (MST-7)
Location: SECURITY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

There was 1 foot of standing water as reported via video from law enforcement and social media.

Hail in EL PASO, COLORADO
From 10-MAY-23 14:03:00 to 10-MAY-23 14:03:00 (MST-7)
Location: PALMER LAKE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

COOP observer reported 1 inch hail.

Hail in TELLER, COLORADO
From 10-MAY-23 14:20:00 to 10-MAY-23 14:20:00 (MST-7)
Location: CRIPPLE CREEK
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail reported in Mueller State Park, posted in a picture on Twitter.

Hail in PUEBLO, COLORADO
From 10-MAY-23 15:06:00 to 17-MAY-23 15:06:00 (MST-7)
Location: PUEBLO WEST
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

One inch hail reported from the public.

Hail in PUEBLO, COLORADO
From 10-MAY-23 15:15:00 to 10-MAY-23 15:15:00 (MST-7)
Location: PUEBLO WEST
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Report came from mPing.

Hail in PUEBLO, COLORADO
From 10-MAY-23 15:20:00 to 10-MAY-23 15:20:00 (MST-7)
Location: PUEBLO WEST
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported 1 inch hail.

Heavy Rain in EL PASO, COLORADO
From 11-MAY-23 06:21:00 to 11-MAY-23 06:21:00 (MST-7)
Location: COLORADO SPGS
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Storm total of 1.81 inches of rain.

Heavy Rain in EL PASO, COLORADO
From 11-MAY-23 07:17:00 to 11-MAY-23 07:17:00 (MST-7)
Location: COLORADO SPGS
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Storm total rainfall amount of 2.36 inches.

Heavy Rain in PUEBLO, COLORADO
From 11-MAY-23 08:00:00 to 11-MAY-23 08:00:00 (MST-7)
Location: PUEBLO
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Heavy thunderstorms, additionally, approximately 0.5 inches of accumulation of hail fell with the heavy rain. Storms began around 3AM.

Heavy Rain in EL PASO, COLORADO
From 11-MAY-23 08:01:00 to 11-MAY-23 08:01:00 (MST-7)
Location: BLACK FOREST
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

There was 2.22 inches of rain that fell.

Heavy Rain in PUEBLO, COLORADO
From 11-MAY-23 08:37:00 to 11-MAY-23 08:37:00 (MST-7)
Location: RYE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

There was 1.5 inches of rain that fell.

Heavy Rain in EL PASO, COLORADO
From 11-MAY-23 08:40:00 to 11-MAY-23 08:40:00 (MST-7)
Location: COLORADO SPGS
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

There was 2.33 inches of rain that fell.

Heavy Rain in EL PASO, COLORADO
From 11-MAY-23 09:26:00 to 11-MAY-23 09:26:00 (MST-7)
Location: COLORADO SPGS
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

There was 2.62 inches of rain that fell.

Heavy Rain in EL PASO, COLORADO
From 11-MAY-23 10:20:00 to 11-MAY-23 10:20:00 (MST-7)
Location: COLORADO SPGS
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

There was 2.44 inches of rain that fell.

Heavy Rain in CUSTER, COLORADO
From 11-MAY-23 10:32:00 to 11-MAY-23 10:32:00 (MST-7)
Location: WETMORE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

There was 1.5 inches of rain that fell.

Heavy Rain in PUEBLO, COLORADO
From 11-MAY-23 14:25:00 to 11-MAY-23 14:25:00 (MST-7)
Location: PUEBLO
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

There was 1.5 inches of rain that fell.

Heavy Rain in EL PASO, COLORADO
From 11-MAY-23 16:05:00 to 11-MAY-23 16:05:00 (MST-7)
Location: BLACK FOREST
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

There was 3.04 inches of rain that fell.

Heavy Rain in EL PASO, COLORADO
From 11-MAY-23 16:15:00 to 11-MAY-23 16:15:00 (MST-7)
Location: MONUMENT
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

There was 1.23 inches of rain that fell since 8am.

Heavy Rain in EL PASO, COLORADO
From 11-MAY-23 17:29:00 to 11-MAY-23 17:29:00 (MST-7)
Location: BLACK FOREST
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

There was 3.52 inches of rain that fell.

Heavy Rain in EL PASO, COLORADO
From 11-MAY-23 21:14:00 to 11-MAY-23 21:14:00 (MST-7)
Location: PETERSON AFB
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

There was 3.23 inches of rain that fell.

Heavy Rain in EL PASO, COLORADO
From 11-MAY-23 21:17:00 to 11-MAY-23 21:17:00 (MST-7)
Location: PETERSON AFB
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

There was 3.23 inches of rain that fell.

Heavy Rain in EL PASO, COLORADO
From 12-MAY-23 06:52:00 to 12-MAY-23 06:52:00 (MST-7)
Location: COLORADO SPGS
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

There was 3.7 inches of rain that fell.

Heavy Rain in EL PASO, COLORADO
From 12-MAY-23 07:37:00 to 12-MAY-23 07:37:00 (MST-7)
Location: COLORADO SPGS
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

The 2 day total was 3.58 inches.

Heavy Rain in EL PASO, COLORADO
From 12-MAY-23 07:00:00 to 12-MAY-23 07:00:00 (MST-7)
Location: BLACK FOREST
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

There was 3.18 inches of rain that fell.

Heavy Rain in EL PASO, COLORADO
From 12-MAY-23 08:00:00 to 12-MAY-23 08:00:00 (MST-7)
Location: MONUMENT
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

There was 3.18 inches of rain that fell.

Heavy Rain in EL PASO, COLORADO
From 12-MAY-23 08:00:00 to 12-MAY-23 08:00:00 (MST-7)
Location: PALMER LAKE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

There was 3.01 inches of rain that fell.

Heavy Rain in EL PASO, COLORADO
From 12-MAY-23 08:00:00 to 12-MAY-23 08:00:00 (MST-7)
Location: MONUMENT
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

There was 3.12 inches of rain that fell.

Heavy Rain in EL PASO, COLORADO
From 12-MAY-23 08:00:00 to 12-MAY-23 08:00:00 (MST-7)
Location: BLACK FOREST
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

There was 3.95 inches of rain that fell.

Heavy Rain in EL PASO, COLORADO
From 12-MAY-23 08:10:00 to 12-MAY-23 08:10:00 (MST-7)
Location: PETERSON AFB
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

There was 3.13 inches of rain that fell.

Heavy Rain in EL PASO, COLORADO
From 12-MAY-23 08:00:00 to 12-MAY-23 08:00:00 (MST-7)
Location: (AFF)USAF ACDMY COLO
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

There was 3.12 inches of rain that fell.

Heavy Rain in EL PASO, COLORADO
From 12-MAY-23 08:00:00 to 12-MAY-23 08:00:00 (MST-7)
Location: MONUMENT
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

There was 3.07 inches of rain that fell.

Heavy Rain in EL PASO, COLORADO
From 12-MAY-23 08:00:00 to 12-MAY-23 08:00:00 (MST-7)
Location: BLACK FOREST
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

There was 3.18 inches of rain that fell.

Heavy Rain in EL PASO, COLORADO
From 12-MAY-23 10:00:00 to 12-MAY-23 10:00:00 (MST-7)
Location: PALMER LAKE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

There was 6.39 inches of rain that fell.

Heavy Snow in TELLER COUNTY / RAMPART RANGE ABOVE 7500 FT / PIKES PEAK BETWEEN 7500 & 11000 FT, COLORADO
From 11-MAY-23 09:19:00 to 11-MAY-23 09:19:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

There was 4 inches of snow.

Heavy Snow in WESTCLIFFE VICINITY / WET MOUNTAIN VALLEY BELOW 8500 FT, COLORADO
From 11-MAY-23 09:18:00 to 11-MAY-23 09:18:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

There was 4 inches of snow that fell.

Heavy Snow in TELLER COUNTY / RAMPART RANGE ABOVE 7500 FT / PIKES PEAK BETWEEN 7500 & 11000 FT, COLORADO
From 11-MAY-23 10:45:00 to 11-MAY-23 10:45:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

There was 7 inches of snow that fell.

Heavy Snow in TELLER COUNTY / RAMPART RANGE ABOVE 7500 FT / PIKES PEAK BETWEEN 7500 & 11000 FT, COLORADO
From 11-MAY-23 18:30:00 to 11-MAY-23 18:30:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

There was 8 inches of snow that fell.

Heavy Snow in TELLER COUNTY / RAMPART RANGE ABOVE 7500 FT / PIKES PEAK BETWEEN 7500 & 11000 FT, COLORADO
From 12-MAY-23 12:54:00 to 12-MAY-23 12:54:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

There was 12 inches of snow that fell.