New Mexico, 2025

Flash Flood and Damaging Wind in New Mexico, September 27, 2025

September 27, 2025 · NWS EPZ · 2 events in 1 county or zone

A negatively tilted trough was moving through southern California and northern Baja which tapped plenty of subtropical moisture. Locally heavy rain developed along the east slopes of the Blacks Range and brought flash flooding and wind damage to the Monticello area.

Where it happened

Every event with a place to put it. Tap one for its entry below.

  • Tornadoes
  • Tropical storms and surge
  • Floods
  • Wind
  • Hail
  • Winter weather
  • Heat and drought
  • Cold
  • Fire, smoke and dust
  • Marine and coastal
  • Other

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The toll

Deaths
0
Injuries
0
Property damage
$25,000
Crop damage
None recorded
Events
2

Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.

What happened

The episode as NWS EPZ wrote it up.

A negatively tilted trough was moving through southern California and northern Baja which tapped plenty of subtropical moisture. Locally heavy rain developed along the east slopes of the Blacks Range and brought flash flooding and wind damage to the Monticello area.

What forecasters said that day

The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS El Paso, TX wrote its last area forecast discussion before the first event at Sep 27, 9:28 PM MST, 47 minutes earlier.

Area forecast discussion, Sep 27, 9:28 PM MST, 47 minutes before
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In the hours before

Special weather statement, Sep 27, 8:36 PM MST, 1 hour 39 minutes before
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The radar

The Holloman AFB radar (KHDX), 131 km away, was scanning. The volume nearest the first event began at 05:17 UTC.

Open the radar archive at this moment

Event by event

1 flash flood, 1 thunderstorm wind. Local standard time, as filed.

Flash Flood, Sierra

When
September 27, 10:15 PM MST to 11:15 PM MST
Where
Sierra County, 1.18 mi WNW of Monticello to 1.26 mi SW of Monticello
Cause
Heavy Rain
Reported by
Social Media
Coordinates
33.406, -107.469

Social media video showed evidence of mud flows and damage from flash flooding near the town of Monticello.

Thunderstorm Wind, Sierra

When
September 27, 10:15 PM MST
Where
Sierra County, 0.22 mi SSW of Monticello
Measured
52 kt (60 mph) estimated gust
Property damage
$25,000
Reported by
Social Media
Coordinates
33.397, -107.451

Social media report showed snapped power poles around Monticello as well as a damaged barn.

What these are

Flash Flood
Flooding that begins within six hours of the rain that causes it, or of a dam or levee failure or ice jam release, often with deadly speed.
Thunderstorm Wind
Winds from a thunderstorm of 50 knots (58 mph) or more, or lower winds that caused damage or casualties. Measured gusts are marked MG, estimated EG.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

More

Every storm in New Mexico in 2025Every state in 2025This day in weather historyWarnings in New Mexico, September 2025

Sources

NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-30. Each event’s entry at NCEI: 1295087, 1295089.