Probability of a tornado within 25 miles of a point. Hatched Area: 10% or greater probability of EF2 - EF5 tornadoes within 25 miles of a point.
Day 1 Tornado Risk
Area (sq. mi.)
Area Pop.
Some Larger Population Centers in Risk Area
No Risk Areas Forecast
Probabilistic Damaging Wind Graphic
Probability of damaging thunderstorm winds or wind gusts of 50 knots or higher within 25 miles of a point. Hatched Area: 10% of greater probability of wind gusts 65 knots or greater within 25 miles of a point.
Day 1 Wind Risk
Area (sq. mi.)
Area Pop.
Some Larger Population Centers in Risk Area
No Risk Areas Forecast
Probabilistic Large Hail Graphic
Probability of hail 1" or larger within 25 miles of a point. Hatched Area: 10% or greater probability of hail 2" or larger within 25 miles of a point.
Day 1 Hail Risk
Area (sq. mi.)
Area Pop.
Some Larger Population Centers in Risk Area
No Risk Areas Forecast
SPC AC 080546
Day 1 Convective Outlook
NWS Storm Prediction Center Norman OK
1246 AM CDT Tue Sep 08 2020
Valid 081200Z - 091200Z
...NO SEVERE THUNDERSTORM AREAS FORECAST...
...SUMMARY...
The risk for severe thunderstorms will be negligible across the U.S.
today and tonight.
...DISCUSSION...
An upper-level low will move slowly across the Four Corners region
today as southwest mid-level flow remains in place across the
southern and central Plains. At the surface, a cold front from the
southern High Plains to the lower Missouri Valley will advance
quickly southward. Weak to moderate instability is forecast to
develop ahead of the front today. As surface temperatures warm and
low-level convergence increases, thunderstorm development is
expected from parts of the southern Plains northeastward to the
southern Great Lakes. Most of the thunderstorm development should
take place behind the front in the less unstable airmass. A few
storms could develop ahead of the front but deep-layer shear is
forecast to be relatively weak across most of the instability
corridor. For this reason, a severe threat is not anticipated across
the CONUS today and tonight.
..Broyles/Cook.. 09/08/2020
CLICK TO GET WUUS01 PTSDY1 PRODUCT
NOTE: THE NEXT DAY 1 OUTLOOK IS SCHEDULED BY 1300Z
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