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Current Conditions

A message from COD Meteorology

Current Local Radar

Temperature
47°F
Feels Like:
47°F
Dew Point	Humidity
34°F	61%

Partly Cloudy

Wind Strength
Light	Moderate	Strong
West-southwest at 16 mph GUST: 27mph

Local Graphical Forecast (Updated: 12/09/23 11:58 am)

Saturday (12/9)
Day	Night

90%	90%
High	Low
49	32

Sunday (12/10)
Day	Night


High	Low
34	23

Monday (12/11)
Day	Night


High	Low
37	28

Tuesday (12/12)
Day	Night


High	Low
37	22

Wednesday (12/13)
Day	Night


High	Low
38	28

Thursday (12/14)
Day	Night


High	Low
45	33

Friday (12/15)
Day	Night


High	Low
46

Detailed Text Forecast (Updated: 12/09/23 11:58 am)

Saturday: A slight chance of sprinkles and flurries after 5pm. Partly sunny, with a temperature falling to around 39 by 4pm. West southwest wind around 15 mph, with gusts as high as 30 mph.

Saturday Night: A slight chance of sprinkles and flurries before 7pm. Mostly cloudy, with a low around 32. West southwest wind 10 to 15 mph, with gusts as high as 25 mph.

Sunday: Mostly cloudy, with a high near 34. West northwest wind around 10 mph, with gusts as high as 20 mph.

Sunday Night: Mostly clear, with a low around 23. West northwest wind around 5 mph, with gusts as high as 15 mph.

Monday: Sunny, with a high near 37. West wind 5 to 10 mph becoming south southwest in the afternoon.

Monday Night: Mostly clear, with a low around 28.

Tuesday: Mostly sunny, with a high near 37.

Tuesday Night: Partly cloudy, with a low around 22.

Wednesday: Sunny, with a high near 38.

Wednesday Night: Mostly clear, with a low around 28.

Thursday: Sunny, with a high near 45.

Thursday Night: Mostly clear, with a low around 33.

Friday: Mostly cloudy, with a high near 46.

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SPC Convective Outlook Day 1

See Product Description

827
ACUS01 KWNS 091637
SWODY1
SPC AC 091636

Day 1 Convective Outlook
NWS Storm Prediction Center Norman OK
1036 AM CST Sat Dec 09 2023

Valid 091630Z - 101200Z

...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS THE LOWER
MISSISSIPPI VALLEY...GULF COAST...TENNESSEE VALLEY...

...SUMMARY...
A few tornadoes, damaging thunderstorm wind gusts, and isolated
severe hail are possible today and tonight from portions of the Ohio
Valley southward to the Lower Mississippi Valley and middle Gulf
Coast.

...Gulf Coast/Lower Mississippi Valley/Tennessee Valley...
Region is being increasingly influenced by height falls but
otherwise resides between larger scale influences of an upper trough
over the Upper Midwest and a positive-tilt trough over the southern
High Plains. Increasing warm-sector moisture (generally lower to
some middle 60s F surface dewpoints) ahead of a southeastward-moving
cold front, along with considerable deep-layer/low-level shear, will
be favorable factors for a long-duration severe risk through the
afternoon into tonight. However, the likelihood of a complex/mixed
quasi-linear convective mode casts uncertainty regarding the
magnitude of the severe risk, particularly regarding a
supercell-related sustained/focused tornado risk. It is also noted
that some guidance suggests that 1-3km AGL winds may somewhat weaken
by late afternoon/early evening within the warm sector, while noting
SRH will still remain favorable for rotating/severe storms.

Storms should continue to increase in coverage through early
afternoon, initially near the front across Arkansas northeastward
into western portions of Tennessee/Kentucky. Sufficiently steep
mid-level lapse rates will support some hail potential, especially
the first part of the day, but the tendency for storm clustering
will otherwise limit this overall potential, as well as limiting
prospects for more consequential hail magnitudes. As the boundary
layer warms this afternoon, the potential for initially
semi-discrete supercells will increase along with related damaging
wind risk as well as tornado potential, which will persist through
the afternoon/evening even with a quasi-linear convective mode.

As warm-sector inhibition further weakens later this afternoon,
additional deepening convection may develop within weak pre-frontal
convergence/confluence regime, mainly across Mississippi into
Alabama, with this development eventually merging with or taking
over as the main convective band this evening. Similarly,
pre-frontal confluence may support isolated supercellular
development along the Gulf Coast/Florida Panhandle vicinity through
late night hours/early Sunday, within a somewhat separate regime
capable of a few severe storms.

..Guyer/Weinman.. 12/09/2023

$$

The "Convective Outlooks" issued by SPC can be thought of as a detailed discussion of the Severe Thunderstorm threat and it's associated risks nationwide. Risk levels range from Marginal to Slight, Enhanced, Moderate, and High and are issued based on the likelihood of 3 major severe weather threats; the risk of tornadoes, damaging winds, and hail. These discussions are often heavily laced meteorological terminology that may be difficult to understand without a background in the field. However understanding these discussions shouldn't be thought of as necessary. Instead, should DuPage county fall under one of these threat levels for severe weather, the response should be to have a heightened level of awareness about the deveoloping weather. Keep an eye on the "Watch County Notification" for any active severe weather watches issued for DuPage county; the "Hazardous Weather Outlook" and "Severe Weather Statement" can also be helpful in explaining the developing risk; additionally, watch for "Active Weather Warnings" and keep an eye on our "Regional Satellite and Radar" products which can be viewed with active watches/warnings or lightning activity.

SPC Convective Outlook Day 2

See Product Description

264
ACUS02 KWNS 091737
SWODY2
SPC AC 091735

Day 2 Convective Outlook
NWS Storm Prediction Center Norman OK
1135 AM CST Sat Dec 09 2023

Valid 101200Z - 111200Z

...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS OVER MUCH OF THE
SOUTHEAST AND TOWARD PARTS OF THE MID ATLANTIC...

...SUMMARY...
Isolated severe thunderstorms will be possible through Sunday
evening across parts of the Southeast States, mainly in the form of
sporadic damaging winds and a few brief tornadoes.

...Synopsis...
A highly amplified upper trough will move from the MS Valley toward
the East Coast on Sunday, with a primary embedded speed max ejecting
quickly from the northern Gulf Coast toward the Mid Atlantic. At the
surface, a cold front will push east across the Appalachians during
the afternoon, with the strongest frontal surge across the Southeast
late in the day and into the evening.

Ahead of the cold front, a surface trough will gradually deepen from
MD southwestward to the FL Panhandle, with 40-50 kt southerly 850 mb
flow aiding moistening. Front-parallel winds aloft as well as modest
destabilization will likely lead to scattered storms, with a few
becoming severe across the region.

...Parts of the Southeast and East Coast...
Scattered storms are likely to be ongoing along the front from
southern AL and the western FL Panhandle across northern GA and the
Appalachians Sunday morning, with substantial low clouds across much
of the region. Lack of appreciable heating will generally reduce
available instability, but sufficient boundary layer moisture with
low to perhaps mid 60s F dewpoints will result in a few hundred J/kg
MLCAPE ahead of the cold front. The strongest cooling aloft will
occur behind the boundary, as the upper trough will be quite
amplified with meridional flow aloft.

Storms across the Southeast may eventually become linear as the cold
front accelerates, and this may yield a few damaging gusts.
Low-level shear may also favor isolated supercells with brief
tornado threat, with the main mitigating factor being lack of
heating. Any pockets of strong heating that do develop could yield
mesocale areas of higher potential, and the southeastern area will
be monitored going into the Day 1 period.

Farther north into the Mid Atlantic, boundary layer stability will
likely reduce severe potential to Marginal Risk levels due to the
combination of weak lift/convergence combined with the
cloudy/saturated profiles. Still, strengthening mean winds in the
lowest few km may support strong to perhaps damaging gusts.

..Jewell.. 12/09/2023

$$

The "Convective Outlooks" issued by SPC can be thought of as a detailed discussion of the Severe Thunderstorm threat and it's associated risks nationwide. Risk levels range from Marginal to Slight, Enhanced, Moderate, and High and are issued based on the likelihood of 3 major severe weather threats; the risk of tornadoes, damaging winds, and hail. These discussions are often heavily laced meteorological terminology that may be difficult to understand without a background in the field. However understanding these discussions shouldn't be thought of as necessary. Instead, should DuPage county fall under one of these threat levels for severe weather, the response should be to have a heightened level of awareness about the deveoloping weather. Keep an eye on the "Watch County Notification" for any active severe weather watches issued for DuPage county; the "Hazardous Weather Outlook" and "Severe Weather Statement" can also be helpful in explaining the developing risk; additionally, watch for "Active Weather Warnings" and keep an eye on our "Regional Satellite and Radar" products which can be viewed with active watches/warnings or lightning activity.