Rolla, Missouri 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

173
FXUS63 KSGF 070057
AFDSGF

Area Forecast Discussion
National Weather Service Springfield MO
657 PM CST Fri Mar 6 2026

.KEY MESSAGES...

- Isolated to scattered severe storms possible late this
  afternoon and evening. Peak hazards are hail up to two inches,
  wind gusts up to 60 to 70 mph, and supercell tornadoes.

- More widespread strong to severe storms likely overnight
  tonight. Peak hazards are hail up to one inch, wind gusts up
  to 60 to 70 mph, and brief spin-up tornadoes.

- Localized flash flooding will occur tonight if storms
  repeatedly move over the same area. Locations that have
  already received significant rainfall the past several days
  will be at the highest risk.

- Another system will bring a chance of strong to severe storms
  the middle of next week with Tuesday outlooked by SPC.

&&

.MESOSCALE...
Issued at 655 PM CST Fri Mar 6 2026

Scattered supercells have initiated across portions of Oklahoma,
southeast Kansas, and far southwest Missouri as of 630 PM local
time, with one producing a confirmed tornado in northeast
Oklahoma. RAP mesoanalysis suggests increasing 0-3 km MLCAPE
across far southwest Missouri and southeast Kansas coincident
with an increasing low-level jet through 9 PM. Likewise,
observations showing locally backed winds are aiding in
increasing 0-1 km storm relative helicity between 250-350 m2/s2.
All of these factors would suggest an increasing tornado threat
over the next 1 to 2 hours across far southwest Missouri and
southeast Kansas.

CAMs continue to show a messy storm mode, with a mix of
supercells and storm clusters perhaps growing into a more
linear segment after 9 PM. Should this occur, the risk of
training storms will increase the chance of flash flooding along
a localized axis, as high rainfall rates (upwards of 2
inches/hr) dump heavy rain over the same locations. Latest HRRR
guidance suggests a band of 4 inches of rain will be possible in
the vicinity of the I-44 corridor in southwest Missouri.

The timing and expected hazards of the well advertised "second
round" of convection associated with the strong cold front
overnight remain on track.

&&

.SHORT TERM /THROUGH SUNDAY/...
Issued at 317 PM CST Fri Mar 6 2026

Synoptic Overview:

Water vapor imagery shows an upper-level trough axis currently
over the High Plains early this afternoon. At the surface, a low
pressure system was sitting over southeast Nebraska. A warm
front was extending to the east through Iowa into the Ohio
Valley while a potent cold front was draped to the south into
the southern Plains. Showers and thunderstorms developed across
north-central Oklahoma into southeast Kansas this morning but
have diminished in intensity as they`ve slowly shifted east into
a less unstable airmass along with a decreasing low-level jet.
Nevertheless, strong southerly winds have developed across
eastern Kansas and extreme southwest Missouri as this higher
momentum flow mixed down to the surface.

Round 1: Isolated to Scattered Supercells Late Afternoon and
Evening:

Models depict a compact shortwave lifting northeast through
Oklahoma and Missouri this afternoon. As it does so, moisture
advection will increase across the forecast area. This moisture
flux along with differential heating and strong mid-level lapse
rates will result in increasing destabilization. Some CAMs are
starting to (we think) better show the development of isolated
to scattered convection across extreme southwest Missouri and
southeast Kansas as this aforementioned shortwave approaches the
area and provides lift for convective initiation. With 0-6 km
bulk shear values of 35-40 kt, supercells will be possible.

There are several confounding variables that still limit our
overall confidence in the evolution of this round of severe
thunderstorm potential. A look at the 12Z HREF reveals two
distinct areas of updraft helicity tracks at 00Z: One across
northern KS, eastern NE, and western IA closer to the surface
low, and another across OK and extreme southwest MO. Notably,
these tracks are specifically NOT where the current convection
is ongoing, suggesting it may prevent sufficient destabilization
for supercell development across those areas. Furthermore, hi-
res guidance shows increasing convective inhibition after dark.
However, this increase in inhibition will be coincident with
the re- strengthening of the low-level jet (along with
potentially backed surface winds as the shortwave passes) which
will curve and elongate hodographs and act to increase tornado
potential. As these storms evolve, some CAMs tend to show these
storms developing into clusters with bowing segments through the
evening, with wind becoming an increasing risk. All of this to
say that these competing effects result in a rather complicated
forecast scenario that limits our confidence.

Round 2: Line of Strong to Severe Storms Tonight:

Strong convergence along the aforementioned cold front will
result in thunderstorm development along and ahead of the
boundary across the central Plains this evening. Shear vectors
will be oriented to the northeast (nearly parallel to the
front), which will support a linear storm mode or storm clusters
with bowing segments. As the line accelerates, damaging straight
line winds will be the primary hazard, but with MUCAPE values
near 1500 J/kg, hail will also be possible. Furthermore, CAMs
suggest limited low-level inhibition will be present ahead of
the front, which will would leave the door open to spin-up
squall line tornadoes. Confidence in this hazard would increase
if coverage of the evening convection is more limited.

With the progressive nature of this system, the flash flood
threat will be limited. However, given the recent rains, soils
have become saturated, and streamflows have responded to this
precipitation. The 3-hr flash flood guidance is around 2 inches
for much of the area. The localized probability matched mean
from both REFS and HREF suggest pockets of 1.5 to 2.5 inches of
rain will be possible through the overnight hours, particularly
if storms train over the same area. Otherwise, widespread
amounts between a quarter and three quarters of an inch are
expected.

Timing and Possible Hazards:

Round 1: 5pm to 12am. Hail up to 2 inch diameter. Wind gusts up
to 60 to 70 mph. Supercell tornadoes. Low to moderate flash
flood risk.

Round 2: 11pm to 6am. Hail up to quarters. Wind gusts up to 60
to 70 mph. Brief spin-up squall line tornadoes. Low to moderate
flash flood risk.

The Storm Prediction Center has outlined western Missouri in an
Enhanced risk (level 3 of 5) for severe thunderstorms, with a
Slight risk (level 2 of 5) elsewhere in the forecast area.

&&

.LONG TERM /SUNDAY NIGHT THROUGH FRIDAY/...
Issued at 317 PM CST Fri Mar 6 2026

Warm Temperatures through Tuesday:

A rather large temperature gradient looks to set up across the
forecast area on Saturday as the strong cold front moves through
Missouri. Locations north of Interstate 44 will see highs in the
50s to near 60 degrees, while locations across south-central and
southeast Missouri will see highs once again in the 70s.

After slightly cooler (but still above average) temperatures on
Sunday, a zonal pattern aloft with southerly low-level winds
will produce strong warm air advection and push temperatures
into the upper 70s to near 80 degrees on Monday and Tuesday. In
fact, overnight lows Monday into Tuesday will only drop to near
60 degrees, which would challenge record warm minimum
temperatures. The ECMWF Extreme Forecast Index captures this
potential well.

Severe Thunderstorm Potential on Tuesday:

Global ensemble guidance depicts a closed low setting up over
the Pacific southwest early next week. While differences persist
in the models on exactly how quickly they shift it to the east,
there is general consensus in moving it Tuesday into Wednesday.
This broad southerly flow will open up the Gulf and increase
moisture across the Ozarks once again. Likewise, enhanced
upper-level flow and jet dynamics may be supportive of
thunderstorm development on Tuesday. The Storm Prediction Center
currently has the entire forecast area outlined in a 15% risk
for severe weather on Tuesday. This potential will be better
assessed in future forecast packages. At the very least, rain
chances increase above 50% Tuesday morning and persist into
Wednesday before a drier airmass settles into the region by
Thursday.

&&

.AVIATION /00Z TAFS THROUGH 00Z SATURDAY/...
Issued at 515 PM CST Fri Mar 6 2026

Scattered thunderstorms have developed across Oklahoma and
southwest Missouri this afternoon. These storms will move
northeast out of Oklahoma through the evening, possibly growing
upscale into clusters or a line segment. The strongest storms
will be capable of producing large hail, wind gusts near 50 kt,
and tornadoes. Visibilities will temporarily drop to 1SM or less
under any thunderstorms due to the heavy rain. Additional
widespread thunderstorms will then sweep through Missouri
overnight, once again providing a risk of widespread damaging
winds. These storms look to clear the terminals around or
shortly after 12Z. With the frontal passage, a period of IFR
ceilings are likely to develop in the morning. Southerly winds
will shift to the northwest behind the front.

&&

.SGF WATCHES/WARNINGS/ADVISORIES...
KS...None.
MO...None.

&&

$$

MESOSCALE...Didio
SHORT TERM...Didio
LONG TERM...Didio
AVIATION...Didio