701
ACUS02 KWNS 081735
SWODY2
SPC AC 081734

Day 2 Convective Outlook
NWS Storm Prediction Center Norman OK
1234 PM CDT Sat Aug 08 2026

Valid 091200Z - 101200Z

...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS OVER MUCH OF
CENTRAL SOUTH DAKOTA...AND FROM EASTERN IOWA INTO NORTHERN
INDIANA...

...SUMMARY...
Scattered damaging winds may occur Sunday from eastern Iowa across
northern Illinois and Indiana. A concentrated area of damaging wind
and hail is also expected over much of South Dakota.

...From eastern IA into northern IN...
Storms, possibly producing strong wind gusts, may be ongoing over
much of the area Sunday morning. This potentially severe activity
could persist for much of the day as it travels southeastward with
access to a destabilizing air mass.

Behind the early activity, strong instability will develop as
low-level winds remain out of the southwest. While mid to upper
level winds will not be particularly strong, the veering low-level
winds and likelihood of redevelopment along any outflow boundaries
suggests additional severe storms during the late afternoon, moving
across much of the same areas as the early day storms. Damaging
winds appear to be the primary concern, however, a brief tornado
cannot be ruled out early in the redevelopment cycle as low-level
instability will be large, with perhaps enhanced low-level shear
near residual outflows.

...Dakotas...
Moderate northwest flow aloft will persist over the region, with
surface winds veering to east/southeast late in the day. A moist
plume should be maintained over SD within the recovering warm
advection regime, with evening 850 mb winds also increasing out of
the south. Surface based storms are expected to develop into much of
SD, with an initial large hail threat. With time, an MCS could
develop, producing a swath of damaging winds. Isolated significant
wind gusts cannot be ruled out.

..Southern AZ...
Easterly flow aloft around the upper high will support a westward
component to the storms motions on Sunday, possibly bringing locally
strong gusts into the lower elevations as storms move out of Mexico,
and possibly off the Rim. Substantial PWAT will remain over the
region with 60s F dewpoints which when combined with steep low-level
lapse rates will support afternoon storms and locally severe gusts.

...Southern Appalachians...
Storms will form over the higher terrain Sunday afternoon from
northern GA into the western Carolinas. Given sufficient storm
concentration, a few damaging gusts cannot be ruled out as storms
and outflows generally spread eastward into the diurnally heating
air mass.

..Jewell.. 08/08/2026

$$