Day 1 Convective Outlook
NWS Storm Prediction Center Norman OK
0229 PM CDT Wed Sep 10 2025
Valid 102000Z - 111200Z
...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS ACROSS THE
NORTH-CENTRAL HIGH PLAINS/FRONT RANGE AND GREAT BASIN/INTERIOR
WEST...
...SUMMARY...
A few severe storms could occur this afternoon and early evening
across the north-central High Plains and Great Basin.
...20z Update...
No changes are needed to the D1 Convective Outlook. See previous
discussion below for more information.
..Thornton.. 09/10/2025
.PREV DISCUSSION... /ISSUED 1130 AM CDT Wed Sep 10 2025/
...High Plains/Front Range...
As the upper ridge tends to abate/shift away, the region will begin
to be influenced by the upper trough over the West. While some
stronger storms could occur across a relatively broad north-south
extent of the High Plains, portions of eastern Wyoming and the
northern Colorado Front Range and immediately adjacent High Plains
are expected to be influenced by somewhat stronger mid-level
westerlies (25 kt), aside from steep lapse rates and moderate
buoyancy. Low severe probabilities have been introduced for what
should be an isolated/relatively marginal severe potential later
this afternoon into evening.
...Great Basin/Interior West...
The region will be influenced by a belt of stronger cyclonic flow
aloft preceding the upper low centered over northern California.
Adequate moisture, steep lapse rates, and stronger deep-layer winds
could allow for some storms to produce gusty winds and small hail,
mainly across central/northern Nevada into southwest Idaho.
Read more CHECK UPDATE ZOOM GRAPHIC
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