Lamar climbs toward 90 degrees Thursday with 40 mph gusts as storm chances build
Prowers County warms through midweek and reaches near 90 degrees Thursday, with south wind gusts to 40 mph and daily shower and thunderstorm chances running from Wednesday through the weekend. The National Weather Service in Pueblo puts Wednesday's rain chance near Lamar at 30 percent, mainly after 5 p.m.
Wednesday starts cloudy and gradually turns mostly sunny, with a high near 86. East-southeast winds of 5 to 10 mph become breezy from the south at 15 to 20 mph in the afternoon, gusting as high as 30 mph. A 40 percent chance of showers and thunderstorms follows Wednesday evening, with a low around 63.
"Multiple waves of showers and thunderstorms expected Wednesday through Friday," Eric Petersen, a meteorologist with the National Weather Service in Pueblo, wrote in Tuesday's Area Forecast Discussion. Petersen wrote that deeper moisture moving north out of Arizona and New Mexico drives a substantial upturn in storm chances across southern Colorado beginning Wednesday.
Heat and wind Thursday, but no fire weather warnings in effect
No watches, warnings or advisories are in effect for Prowers County. The only hazard headline in the Pueblo forecast area is a flood watch for the eastern San Juan Mountains from Wednesday afternoon through Thursday evening, far to the west.
Even without a formal warning, Thursday combines the week's highest temperature with south winds of 20 to 25 mph and gusts to 40 mph — a combination that can push fire danger up quickly in dry grass and unburned fuels. Rainfall earlier in the week should temper that risk, but crews working outdoors Thursday should take care with equipment and ignition sources.
Lamar, Colo. — Five-day forecast (Sept. 16-20, 2026)
Source: National Weather Service, Pueblo — Issued Sept. 15, 2026
| Period | Sky Conditions | High/Low | Wind |
|---|---|---|---|
| Wednesday | Cloudy, becoming mostly sunny; 30% showers and thunderstorms, mainly after 5 p.m. | High near 86 | East-southeast 5 to 10 mph, becoming south 15 to 20 mph in the afternoon; gusts to 30 mph |
| Wednesday Night | Mostly cloudy, becoming mostly clear; 40% showers and thunderstorms in the evening | Low around 63 | South-southeast 5 to 15 mph, becoming southwest in the evening |
| Thursday | Sunny | High near 90 | South 10 to 15 mph, increasing to 20 to 25 mph in the afternoon; gusts to 40 mph |
| Thursday Night | Mostly cloudy; 10% showers and thunderstorms before 9 p.m. | Low around 65 | South 15 to 20 mph; gusts to 40 mph |
| Friday | Mostly sunny | High near 88 | West-southwest 5 to 15 mph |
| Friday Night | Mostly cloudy; 20% showers and thunderstorms before midnight | Low around 61 | South around 5 mph, becoming west after midnight |
| Saturday | Mostly sunny; 10% showers and thunderstorms after noon | High near 83 | Northwest 5 to 10 mph, becoming north-northeast in the afternoon |
| Saturday Night | Mostly cloudy; showers likely, thunderstorm possible (60%) | Low around 59 | North 5 to 10 mph |
| Sunday | Mostly sunny; chance of showers, thunderstorms possible after noon (30%) | High near 76 | Northeast 5 to 10 mph |
| Sunday Night | Partly cloudy; chance of showers | Low around 53 | East 5 to 10 mph |
(Kiowa County Press)
Thursday and Friday
Thursday is the hottest and windiest day of the period. Skies are sunny with a high near 90, and south winds of 10 to 15 mph increase to 20 to 25 mph in the afternoon with gusts as high as 40 mph. The breeze holds overnight, with south winds of 15 to 20 mph still gusting to 40 mph and a low around 65.
Friday stays warm with mostly sunny skies and a high near 88, and winds ease to west-southwest at 5 to 15 mph. A 20 percent chance of showers and thunderstorms returns before midnight, with an overnight low around 61.
Extended outlook
A Pacific Northwest upper-level trough moving east across the northern Rockies Friday and Saturday is expected to nudge the main moisture plume toward the eastern mountains and plains. Saturday is mostly sunny with a high near 83 and only a 10 percent chance of afternoon storms, but the weekend's best rain chance comes Saturday night, when showers are likely and a thunderstorm is possible, with a 60 percent chance of precipitation and a low around 59.
Sunday cools to a high near 76 behind a weak cold front, with northeast winds of 5 to 10 mph and a 30 percent chance of showers. Forecasters cautioned that model guidance for Sunday and Monday has swung between wet and dry, and that storm chances early next week may end up lower than currently advertised.
With highs near 90 and strong afternoon winds Thursday, residents should plan for heat and blowing dust, and seek shelter indoors when thunderstorms move through in the late afternoon and evening.
