Allie Mazurek

Alrighty, ready to see something really cool? (and maybe a little nauseating)

The evolution of Hurricane Melissa's mesovortices at peak strength.

A lightning-packed eye spins ferociously at the center of Hurricane Melissa.

[Melissa forecast analysis, Friday 10/24]

The forecast is looking increasingly dire for Jamaica. Model guidance has increasingly clustered on a direct hit - Jamaica has only had close calls from five category 4 hurricanes on record - with catastrophic flooding a major concern.

Summary graphic titled "Colorado Drought Update". It shows the current US Drought Monitor for Colorado, change in the current US Drought Monitor for Colorado since last week, and percent area of Colorado experiencing drought.

There were major improvements to this week's drought monitor following the significant precipitation and flooding that impacted western CO over the past week. Changes include two-category improvements over portions of southwest CO, many of which are now drought-free. #cowx

Major rainfall and flooding in southwest Colorado - Colorado Climate Blog On Friday and Saturday, southwestern Colorado experienced one of the largest fall rainstorms ever to hit the region. Rainfall totals from 2 to over 4 inches were reported at both lower and higher elev...

Some early analysis of the major rainfall and flooding in southwest Colorado this weekend in this blog post. It was one of the largest fall rainstorms ever to hit the region, and resulted in major flooding on the San Juan River in Pagosa Springs and on Vallecito Creek, among other locations. #cowx

Golden aspen surround a dirt road.

Golden aspen shade the sun.

Golden aspen surround a dirt road.

Golden aspen and Engelmann spruce surround a dirt road.

It is raining gold on the San Juans. Probably peak color for the season as rain moves in this weekend.

Global Ensemble Forecast System mean precipitable water and 700-mb winds valid on Saturday morning, 11 October 2025. A big plume of moisture will be transported into the southwest US ahead of decaying Hurricane Priscilla. From https://schumacher.atmos.colostate.edu/weather/ens.php

Standardized anomaly of precipitable water from the ECWMF ensemble mean on Saturday morning, 11 October 2025. It shows a broad swath of greater than +3 standard deviations in the western US. From https://schumacher.atmos.colostate.edu/weather/ecmwf.php

Ensemble forecast plume showing precipitable water at Grand Junction, Colorado in the members of the ECWMF ensemble. Values are predicted to be around 25-30 mm with high confidence on Friday 10 October through Saturday 11 October, far above the 90th percentile for the date. From https://schumacher.atmos.colostate.edu/weather/ecmwf.php

Highly unusual situation approaching western Colorado with the moisture from Hurricane Priscilla. Grand Junction has never had precipitable water over an inch (25mm) so late in the year, but looks like it will be near that level on both Fri & Sat. Six standard deviations above average! #cowx 1/2

First fall freezes - Colorado Climate Blog Climatological fall has arrived, and although September thus far has been much warmer than normal across most of Colorado, it’s still time to be thinking about when the first freeze could happen. Now,...

Most of Colorado's lower elevations haven't yet had a freeze this fall, but it'll get cold sooner or later. Here's our blog post from last year on when first freezes tend to happen across the state. #cowx

5 emotionless people look at one person who is viewing a laptop screen and saying hmmmm

there’s always one person in the family who looks at the Doppler radar

Happy New (Water) Year! 🥳 Today marks the first day of Water Year 2026. But what is a "water year" and why does it begin in October? Here's a short explainer! [1/7]

It's that time of year for green and gold 💚💛

Red leaves in the foreground with mountains covered in green trees with hints of yellow under a blue sky

A yellow and green tree-covered hillside with blue sky

fall! 🍂

What a game!! GO DAWGS! 🐶

Tornado near Pleaant View, Colorado this afternoon…near the Utah/Colorado line in southwestern Colorado!

📸: Landan Wilson

The southeast Utah #tornado this afternoon. From X. #WxSky

A summary flier showing a map of Colorado with the US Drought Monitor overlaid with notable climate statistics August 2025. There is a photo of a waterfall with trees behind the map and text.

August Recap ⏪: Hot, dry conditions intensified drought and fanned wildfires across western Colorado, but monsoon moisture finally delivered some much-needed precipitation at the end of the month. Just how significant was that rainfall? All that and more in our monthly climate summary! col.st/STpEm

She’s a star!! 🌟🧀

Impressive weekly rain totals around the Denver area and across Colorado!

Gonna thread some exact totals, but general idea:

Denver metro: 0.5-3” (most 1-2”)
Mountains: Most 1-2”
Southern CO (Colorado Springs on south): 2-6”+

#COwx

Screenshot of Figure 2c in Kalashnikov et al. (2025, Earth's Future), which shows CESM2 ensemble distribution of projected changes in CG lightning and LIW-risk days averaged across ecoprovinces. Horizontal lines within boxplots indicate medians and whiskers represent spread of the 50 ensemble members. Text along the bottom shows ensemble-mean changes, with * indicating that a majority of grid cells have >75% ensemble agreement on the sign of change in that ecoprovince.

✅ We have a new study out this week, which projects changes in cloud-to-ground (CG) lightning days across the Western United States, along with the associated risk of lightning-ignited wildfires (LIW).

+ #OpenAccess Paper (@agu.org): doi.org/10.1029/2025...
+ Summary: news.wsu.edu/press-releas...

Incredible video from Arizona State University Football of the haboob that moved through the Tempe area earlier this evening

🚨 The @nws.noaa.gov is hiring #Meteorologists! 🚨

A total of 40 entry-level #Meteorologist positions are now open across multiple Weather Forecast Offices nationwide, closing #September 8th.

Link: www.usajobs.gov/Search/Resul...

#Hiring #Meteorology #STEM #FederalJobs

Right around 5am EDT on Friday, Hurricane #Erin 2025 passed over the same spot that Hurricane Erin 2001 was at on the infamous morning of September 11, 2001.
Waiting for sunrise on it today, here's a comparison of the two storms at *almost* the same location. Amazing.
[1/2]

Photo of a display table with weather instruments and a mountain landscape in the background

Greetings from the Colorado Water Congress summer conference in beautiful (but dry) Steamboat Springs. We’re discussing our work with CoAgMET and especially the effort to improve soil moisture monitoring across Colorado!

The #LeeFire is now the 2nd largest #wildfire in the US, just ~5,200 acres shy of CO's 3 largest in recorded history at 133,841 acres (+72,865 vs last wk)
An incredible job by firefighters holding the S end, significantly slowing growth in extreme drought conditions (ERCs in 99.9th percentile!)

Mid-August Colorado drought update: exceptional drought returns to the state for the first time since 2023 - Colorado Climate Blog The latest US Drought Monitor (released August 14) highlights big changes to the current drought situation in western Colorado, including the introduction of “exceptional” or “D4” conditions to some l...

ICYMI: Parts of western Colorado are now experiencing exceptional drought. Curious how we got here and what we might expect in the coming weeks and months? Check out today's blog post ⬇️

col.st/j3EpX

A lot of people still don’t know that we have a mesonet in Colorado — and we’re working to make it better every year! #cowx

A tornado warning for a town of zero people led me to learn about Ninaview, Colorado and its accidental bombing during WWII.

Whoa! Dew points just jumped 25° in 17 minutes (37° to 62°) at DIA just now as that boundary moved through.

Incredible! That outflow boundary just pulled in some Gulf moisture from the east.

#COwx

Absolutely incredible view of the earlier Westcliffe tornado!

This vantage point is simply amazing. Wow times a million!

📸: Rick Sandoval

#COwx

In our new paper, we investigate how warming & drying in CO from 1981–2021 has affected trends in cool-season precipitation, which provide most of our water resources. 💧❄️

This results in more dry days and less snow days, with more ablation at high altitudes.

Read more: here 👉 lnkd.in/er2ieAh2