A thunderstorm developed over northwest Pueblo County aft 1 p.m. Monday afternoon. The National Weather Service Doppler radar indicated large hail developing aloft and showed some rotation. A severe thunderstorm warning was issued at 1:23 p.m. The severe storm moved over Pueblo West around 1:30 p.m.
The storm continued to show some rotation, and took on the characteristics of a low-precipitation supercell. Oftentimes...this type of supercell thunderstorm produces large hail, but little rain. In this case, rainfall amounts were generally under 1/4 inch, but the hail was as large as golfballs.
The photo below shows the storm from the National Weather Service Office east of Pueblo. The wall cloud (lowering of the thunderstorm base) on the southwest side of the storm is very evident in the lower center of the photo. If the storm would have had better rotation, and a more favorable environment, a tornado could have come out of this wall cloud feature. The anvil (upper part of the storm) was massive, extending over the National Weather Service Office and many miles east of Pueblo.
Tom Magnuson, Warning Coordination Meteorologist, NWS Pueblo
Last updated...4:43 p.m., July 6th