RSS Mesoscale Discussions from Storm Prediction Center
SPC 1630Z Day 1 Outlook
Day 1 Convective Outlook
NWS Storm Prediction Center Norman OK
1116 AM CDT Mon Apr 06 2026
Valid 061630Z - 071200Z
...NO SEVERE THUNDERSTORM AREAS FORECAST...
...SUMMARY...
Isolated to scattered thunderstorms are expected today across the
Florida Peninsula and portions of the Southwest, Pacific Northwest,
and eastern Great Lakes. While a few strong storms may occur across
the central/southern Florida Peninsula, organized severe potential
should remain low.
...Synopsis and Discussion...
Mean longwave troughing will remain over the eastern COUNS today,
while a weak mid-level shortwave trough advances eastward across the
Gulf towards the FL Peninsula by late tonight. At the surface, high
pressure centered over the southern Plains to TN/OH Valleys will
maintain offshore low-level trajectories and limited low-level
moisture over a large majority of the CONUS. Still, isolated
lightning flashes may occur today across parts of the eastern Great
Lakes, Southwest, and Pacific Northwest in association with weak
mid-level perturbations amid the presence of sufficient MUCAPE and
modest lift.
Greater low-level moisture (mid 60s to low 70s surface dewpoints)
will remain confined along/south of a cold front draped across the
central FL Peninsula. Isolated to scattered thunderstorms are
expected to develop this afternoon across central/south FL as
daytime heating erodes lingering MLCIN, especially across interior
areas. With the low-amplitude shortwave trough remaining well to the
west over the Gulf through the day, weak low/mid-level winds and
meager deep-layer shear over land will likely limit updraft
organization and severe potential. Still, occasional strong/gusty
downburst winds may occur with the more robust cores as low-level
lapse rates become steepened with continued diurnal heating.
..Gleason/Wendt.. 04/06/2026
Read more
SPC 2000Z Day 1 Outlook
Day 1 Convective Outlook
NWS Storm Prediction Center Norman OK
0220 PM CDT Mon Apr 06 2026
Valid 062000Z - 071200Z
...NO SEVERE THUNDERSTORM AREAS FORECAST...
...SUMMARY...
Isolated to scattered thunderstorms are expected today across the
Florida Peninsula and portions of the Southwest, Pacific Northwest,
and eastern Great Lakes. While a few strong storms may occur across
the central/southern Florida Peninsula, organized severe potential
should remain low.
...20z Update...
No changes are need to the current D1 Convective Outlook. See
previous discussion below for more information.
..Thornton.. 04/06/2026
.PREV DISCUSSION... /ISSUED 1116 AM CDT Mon Apr 06 2026/
...Synopsis and Discussion...
Mean longwave troughing will remain over the eastern COUNS today,
while a weak mid-level shortwave trough advances eastward across the
Gulf towards the FL Peninsula by late tonight. At the surface, high
pressure centered over the southern Plains to TN/OH Valleys will
maintain offshore low-level trajectories and limited low-level
moisture over a large majority of the CONUS. Still, isolated
lightning flashes may occur today across parts of the eastern Great
Lakes, Southwest, and Pacific Northwest in association with weak
mid-level perturbations amid the presence of sufficient MUCAPE and
modest lift.
Greater low-level moisture (mid 60s to low 70s surface dewpoints)
will remain confined along/south of a cold front draped across the
central FL Peninsula. Isolated to scattered thunderstorms are
expected to develop this afternoon across central/south FL as
daytime heating erodes lingering MLCIN, especially across interior
areas. With the low-amplitude shortwave trough remaining well to the
west over the Gulf through the day, weak low/mid-level winds and
meager deep-layer shear over land will likely limit updraft
organization and severe potential. Still, occasional strong/gusty
downburst winds may occur with the more robust cores as low-level
lapse rates become steepened with continued diurnal heating.
Read more
SPC 1730Z Day 2 Outlook
Day 2 Convective Outlook
NWS Storm Prediction Center Norman OK
1135 AM CDT Mon Apr 06 2026
Valid 071200Z - 081200Z
...NO SEVERE THUNDERSTORM AREAS FORECAST...
...SUMMARY...
Isolated to scattered thunderstorms are expected on Tuesday across
parts of the Florida Peninsula, the southern Rockies, and northern
High Plains. No severe threat is forecast across the U.S. Tuesday
and Tuesday night.
...Synopsis...
Strong surface high pressure over the Great Lakes and a cold front
oriented across north-central FL into the Gulf will result in a
mostly dry/stable boundary layer east of the Rockies. Ahead of the
front across parts of the FL Peninsula, a seasonally moist and
weakly unstable airmass will be in place. Isolated to scattered
thunderstorms will be possible across the central/southern FL
Peninsula and the Keys, though modest vertical shear and poor lapse
rates will preclude severe thunderstorm potential.
Additional isolated to scattered storms are possible across portions
of the Four Corners and southern Rockies vicinity. Midlevel
moistening amid steep lapse rates will support weak destabilization
as an upper shortwave trough moves across the region. This should
support weak thunderstorm activity, though severe storms are not
expected. Further north, another upper shortwave trough will move
across the northern Rockies to the northern High Plains. While
moisture will be limited (PW values generally less than .75 in), a
few high-based thunderstorms will be possible across eastern MT and
vicinity as steep midlevel lapse rates and cold temperatures aloft
foster weak destabilization. Inverted-v sub-cloud thermodynamic
profiles may support locally gusty winds, but severe convection is
not expected.
..Leitman.. 04/06/2026
Read more
SPC 1930Z Day 3 Outlook
Day 3 Convective Outlook
NWS Storm Prediction Center Norman OK
0208 PM CDT Mon Apr 06 2026
Valid 081200Z - 091200Z
...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS ACROSS PORTIONS
OF KANSAS INTO FAR SOUTHERN NEBRASKA...
...SUMMARY...
Thunderstorms with isolated large hail will be possible in parts of
the central Plains Wednesday evening.
...Central Plains...
A compact upper trough/low will move from the northern Plains to the
Great Lakes on Wednesday. At the surface, low pressure will shift
from southern Manitoba to near James Bay in Ontario. A trailing cold
front will develop southeast across the Upper Midwest and central
Plains. Boundary-layer moisture will remain limited due to
persistent surface high pressure across the East, cutting off
stronger Gulf moisture return. Nevertheless, cold temperatures aloft
(around -15 C at 500 mb) will support steep midlevel lapse rates and
weak instability in a corridor along/just ahead of the cold front
across the central Plains.
Isolated thunderstorms are forecast near the front during the
evening. Vertical shear will be somewhat weak through 6 km, but
effective shear magnitudes around 25-30 kt is evident in forecast
soundings. Furthermore, strong west/northwesterly flow through the
top half of the cloud-bearing layer will result in
lengthened/straight hodographs. A deep, well-mixed boundary layer is
also forecast. This environment marginally supports a few strong to
severe storms capable of producing locally strong gusts, and perhaps
marginally severe hail if updrafts can be sustained.
..Leitman.. 04/06/2026
Read more
