Severe Storm Outlook Narrative (AC)
Issued by NWS

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary On
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 
000
ACUS01 KWNS 120527
SWODY1
SPC AC 120525

Day 1 Convective Outlook
NWS Storm Prediction Center Norman OK
1225 AM CDT Fri Apr 12 2024

Valid 121200Z - 131200Z

...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS ACROSS PORTIONS
OF THE NORTHERN INTER MOUNTAIN REGION...

...SUMMARY...
A few marginally severe wind gusts and hail are possible over
northern Nevada, eastern Oregon, and western Idaho during the late
afternoon to early evening.

...Northern Inter Mountain Region...

Upper low is forecast to settle southeast toward the northern CA
Coast late in the day1 period. This evolution will ensure short-wave
ridging holds across the northern Rockies, effectively suppressing
any appreciable large-scale ascent. Even so, some moistening is
expected across this region, albeit meager, as meridional flow
across northern CA/eastern OR will encourage PW values to exceed
0.50 inch within a warm-advection regime. Latest model guidance
suggests some boundary-layer heating will contribute to weak
buoyancy within a strongly sheared environment. Isolated-scattered
convection is expected to develop across northwestern NV/eastern OR
extending into the northern Rockies of western MT by late afternoon.
Forecast soundings suggest gusty winds may accompany some of this
convection, and marginally severe hail may also be noted with the
most robust updrafts. Boundary-layer cooling should result in
weakening convection during the mid-evening hours.

..Darrow/Lyons.. 04/12/2024

$$
USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.