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from: Sep 25 2020 7:00 pm until: 22:00 Special Weather Statement level: minor
minimal threat to life or property - responsive action should be taken soon (within next hour)
...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN MARQUETTE... SOUTHWESTERN HOUGHTON...BARAGA AND EAST CENTRAL ONTONAGON COUNTIES UNTIL 1000 PM EDT... At 934 PM EDT, Doppler radar was tracking strong thunderstorms along a line extending from near Chassell to 8 miles southeast of Rockland. Movement was east at 40 mph.

Information from NOAA Storm Prediction Center at this website

More SPC info on this site: 

SPC Day 1 Outlook

Updates are issued at 0600 UTC, 1300 UTC, 1630 UTC, 2000 UTC, 0100 UTC - Current UTC time: Sep 26 2020 1:54 am


Convective Tornado Hail Wind <= Move cursor over selections to display the selected graphic below.

Day 2


Categorical Day 1 Outlook

000
ACUS01 KWNS 260102
SWODY1
SPC AC 260101

Day 1 Convective Outlook  
NWS Storm Prediction Center Norman OK
0801 PM CDT Fri Sep 25 2020

Valid 260100Z - 261200Z

...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS PORTIONS OF
WESTERN UPPER MICHIGAN AND ADJACENT NORTHERN WISCONSIN...

...SUMMARY...
Risk for severe weather will continue during the evening hours
across far northern Wisconsin and western Upper Michigan.

...Western Upper Michigan and adjacent northern Wisconsin...
A small cluster of stronger thunderstorms has evolved this evening
over portions of western Lake Superior and into adjacent parts of
western Upper Michigan and northern Wisconsin.  The convection is
occurring just ahead of an advancing surface front, where a narrow
axis of modest (around 1000 J/kg) mixed-layer CAPE is indicated.  

While instability is limited -- and should gradually diminish both
with time, and with eastward extent, strong low-level flow
veering/increasing with eight to southwesterly at mid levels is
providing favorable shear for organized/supercell storms.  As such,
a narrow window -- both temporally and spatially -- remains evident
where potential for large hail and locally damaging winds, along
with a tornado or two, exists.  This threat should diminish as
midnight approaches, and storms shift into an increasingly less
unstable airmass.

...Central and eastern South Carolina/southeast North Carolina...
Moderate/veering flow with height persists across the Atlantic Coast
states, near and east of a north-south surface trough extending from
Virginia to Florida.  A moist boundary layer but weak lapse rates
aloft continues to support around 1000 J/kg mixed-layer CAPE from
southeastern North Carolina southward, where showers and scattered
thunderstorms continue.  The overall environment -- kinematically
and thermodynamically -- remains supportive of an occasional
stronger storm or two, with locally gusty winds or even a brief
tornado possible.  While limited overall, this potential may linger
for a few more hours, as the mid-level trough crossing the central
Appalachians continues moving steadily eastward toward the Mid
Atlantic coast.

..Goss.. 09/26/2020

$$
        

Day 3

Day 4

Largly based on original scripts from Ken True: saratoga-weather.org and Rick Curly: ricksturf.com

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