textproduct: Detroit/Pontiac
This forecast discussion was created in the public domain by the National Weather Service. It can be found in its original form here.
KEY MESSAGES
- Dry weather with plentiful sunshine continues through mid week.
- Near normal temperatures early week become warmer and much more humid into next weekend. - The next chance of rain develops Friday and continues through the weekend.
DTW THRESHOLD PROBABILITIES
* None.
PREV DISCUSSION
Issued at 301 AM EDT Tue Jun 2 2026
DISCUSSION...
Blocking pattern over North America and the Great Lakes region will persist a few more days this week albeit morphing from the high amplitude Omega feature into more a Rex Block configuration. The greatest geopotential height center in a deep portion of the atmosphere centers over Lower Michigan late today and Wednesday. Most recent NAEFS data continues to suggest 99.5 percentile or climatological maximums for geopotential heights between 1000 and 500mb from this morning through approximately 06z Thursday. The net result will be warmer daytime temperatures with daytime readings climbing into the 80s Wednesday and Thursday.
Upper level ridging in the rex block flattens significantly by Friday and Saturday as an entrance region to a weak jetlet settles into Lower Michigan. Models continue to advertise a fairly unorganized frontal boundary developing under the jet entrance region as Great Plains moisture/latent heating begins to streamline eastward. Low confidence continues for both when precipitation chances will begin here across Southeast Michigan and as to how long favorable dynamics for ascent will stall out. Shower and thundestorm chances will be needed at minimum for the late Friday through Sunday time period. Low confidence on character of convection as alot will depend on storm scale mesoscale complex dynamics. The main narrative late in the forecast period continues to be much warmer with a lot more humidity.
MARINE...
High pressure builds south into the Great Lakes today, with northeast winds becoming variable this evening-Wednesday. The high pressure center reaches the Ohio Valley Thursday, causing winds to organize out of the southwest. Quiet marine conditions persist until Friday-this weekend when the governing ridge breaks down. This will be the next opportunity for showers and thunderstorms.
DTX WATCHES/WARNINGS/ADVISORIES
MI...None. Lake Huron...None. Lake St Clair...None. Michigan waters of Lake Erie...None.
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