Monsoon and hail roof damage
What New Mexico storms actually do to a roof, using the National Weather Service's own numbers rather than a roofer's adjectives.
Most of the year's water lands in about twelve weeks, and it arrives with wind.
Roofing companies talk about monsoon season in adjectives. Here are the figures instead, all from the National Weather Service forecast office in Albuquerque.
| Measure | Figure | Period |
|---|---|---|
| Average monsoon onset, central Rio Grande valley including Albuquerque | Around July 9 | Climatological average |
| Average monsoon onset, southwest corner of the state | Around July 3 | Climatological average |
| Share of annual precipitation, central and northern New Mexico | 40 to 50 percent | July, August, September |
| Severe hail reports per year | 150 | Decade ending 2024 |
| Severe thunderstorm wind events per year | 84 | Decade ending 2024 |
| Severe thunderstorm wind events per year, earlier baseline | 26 | 1979 to 2009 |
| Flash floods occurring in July and August alone | Two thirds | Statewide |
| Downburst straight-line winds | Over 100 mph | Documented capability |
Sources: NWS Albuquerque North American Monsoon Highlights, Severe Weather Climatology for New Mexico, and Downburst Winds and Dust Storms. These are statewide and regional figures. They are not measurements of your street.
Wind is the underrated half
The jump in that table is the one worth sitting with. Severe thunderstorm wind events went from an average of 26 a year over 1979 to 2009 to an average of 84 a year over the decade ending 2024. The National Weather Service also states directly that downbursts and flash floods are the two thunderstorm-related weather hazards most likely to produce property damage in the state of New Mexico, and that downbursts are capable of producing damaging straight-line winds of over 100 mph, with a leading edge it calls an outflow boundary or gust front.
What that means on a roof is specific. Wind does not usually destroy a sound roof. It finds the piece that was already marginal, a corner of edge metal, a ridge cap, a shingle that never sealed properly, lifts it, and leaves an opening. Then the rain, which arrives in the same storm, goes through it sideways.
Hail damage does not look like damage
New Mexico averaged 150 severe hail reports a year over the decade ending 2024. Hail rarely punches a hole in a roof. It bruises shingles and knocks granules loose, which shortens the remaining service life of the field without producing a single visible defect from the ground. The tells worth checking are granules collecting in gutters and at downspout outlets, dents in soft metal such as vents and flashing, and bruising that only shows up when somebody presses on a shingle.
Flash flooding is a drainage problem before it is a flooding problem
Two thirds of New Mexico flash floods happen in July and August alone. On a roof, the same physics shows up smaller: a drainage path sized for ordinary rain gets a month of water in an hour. On a low-slope roof that means ponding, and ponding is what ends a membrane early. On a pitched roof it means valleys, gutters and downspouts carrying more than they were ever asked to carry, and finding out where the weak seal is.
The useful sequence
- Before July: get the roof walked. Edge metal, ridge caps, flashing, drainage. This is the cheap end of the whole exercise.
- During the season: watch ceilings, not the roof. A stain travels, so it rarely appears under the entry point.
- After a hail event: check gutters for granules before assuming nothing happened.
- After a gust front: look at edges and ridges specifically, from a safe vantage.
- Water coming in now: call. Emergency leak support is one of the six services here.
Call (505) 616-3308. The crew walks the roof and gives you the exact price in person.
Monsoon and hail damage: common questions
When does the Albuquerque monsoon actually start?
The National Weather Service office in Albuquerque gives an average onset around July 3 for the southwest corner of the state and around July 9 for the central Rio Grande valley, which includes Albuquerque. Average onset is not a date on a calendar. It is the middle of a distribution, and some years it arrives early.
How much of the year's rain arrives in that window?
40 to 50 percent of annual precipitation across central and northern New Mexico falls in July, August and September, per the same source, mostly as thunderstorms. The southwest corner of the state gets 50 to 60 percent.
Is hail actually a problem in New Mexico, or is that a Texas thing?
It is a real problem here. The National Weather Service reports that for the decade ending 2024, New Mexico averaged 150 severe hail reports a year. It also notes the majority of the state's severe weather occurs across central and eastern New Mexico.
Is wind or hail the bigger threat to my roof?
The National Weather Service is direct about this: downbursts and flash floods are the two thunderstorm-related weather hazards most likely to produce property damage in New Mexico. Severe thunderstorm wind events averaged 84 a year over the decade ending 2024, against 26 a year over 1979 to 2009. Downbursts can produce straight-line winds over 100 mph.
What does hail damage look like from the ground?
Often like nothing. That is the problem with it. Bruising on shingles, granule loss collecting in gutters, and dented soft metal like vents and flashing are the usual tells, and the first two are not visible from a driveway.
Should I get the roof looked at before or after a storm?
Before, if you get the choice. A pre-monsoon look catches the loose edge metal that a gust front would otherwise turn into an entry point. After a storm is worth doing too, but by then you are pricing damage rather than preventing it.
Water is coming through right now. What do I do?
Call. Emergency leak support is one of the services the roofing company here offers. This page promises no response time because the operator publishes none, so ask on the call and get a real answer rather than a marketing one.
Will this cost me anything to find out?
The exact price for any work gets set in person after the roof is walked. This page publishes no price of its own and promises no free anything, because neither would be honest to put in writing here.
Get it looked at before July, not during it.
Call and book a walk. The crew checks the edges, the flashing and the drainage, and prices anything that needs doing in person.
(505) 616-3308