Minnesota Weather:  10/29/17

Yesterday was cold and cloudy yesterday in Minneapolis.

This morning has been cloudy, cold and still.

National Weather Service (NWS) at Twin Cities/Chanhassen forecasts (for Minneapolis) a cloudy day, with a 60% chance of rain, and a high temperature of 44 F.  The winds will be from the south at 10 mph, becoming west southwest.  This evening will be mostly cloudy, with a 20% chance of rain, and a low temperature of 32 F. Winds will be west at 10 mph.

The NWS in Duluth forecasts (for Duluth) a mostly cloudy day, with a 20% chance of rain, and a high temperature of 38 F. The winds will be from the south at 10 mph, gusting to 20 mph.  This evening will be mostly cloudy, with a 30% chance of mixed rain and snow. low temperature of 33 F. Winds will be from the west at 10 mph, gusting to 20 mph.

The visible satellite imagery shows a thin blanket of stratus clouds over most of the state this morning.

The infrared satellite imagery shows that the clouds are moderately thick over he state this morning.

The water vapor imagery shows a mid-latitude cyclone that is moving north across Canada.

The 12Z sounding from Twin Cities shows a saturated layer between 750 mb to 650 mb.   There was 0.44 inches of precipitable water present in the column this morning.  There was no Convective Available Potential Energy (CAPE) and no Convective Inhibition (CINH) present.  There was a large thermal inversion near the surface, and the 0-3 km average lapse rate was 2.1 C/km.

The hodograph shows that there was 13 kt of low-level shear (mostly due to speed changes) and 60 kts of deep-layer shear (mostly due to speed changes).

The surface observations (from the SPC Mesoscale Analysis Map) show cold temperatures and high humidity, (based on the surface dewpoint depressions).  The winds are light, and the skies are cloudy, and Doppler RADAR shows rain over the southern part of the state.

There is a low pressure system over the entire state, with only a weak pressure gradient over the state this morning.  The RAP shows that no strong gradients are expected over the next six hours.

Synoptically speaking, the 300 mb NAM chart (from Unisys) shows strong, northwesterly flow over the state today as a deep trough moves east.

The 500 mb NAM chart shows some Positive Vorticity Advection (PVA) to the southeast of the mid-latitude cyclone.

The 700 mb NAM chart shows no major pockets of rapidly-rising air over the state today.  This chart has been excluded from today’s post.

The 850 mb NAM chart shows no strong thermal advection over the state today.  This chart has been excluded from today’s post.

The Precipitation chart shows that some light precipitation (a mix of rain and snow)over most of the state by 00 Z.

Today will be cold and cloudy all day today.  I guess we are getting to see typical fall weather in Minnesota again today.

Thank you for reading my post.

The upper air soundings and mesoscale analysis plots are from the Storm Prediction Center website.
The forecasted upper air soundings are from TwisterData.com.
The surface observation and upper level charts are from Unisys Weather.
The satellite data is from College of DuPage – SATRAD

About highplainschasing

This blog is about my tales in storm chasing. My name is Seth Price and I am an instrumentation instructor at New Mexico Tech. My amateur radio call sign is N3MRA.
This entry was posted in Local WX, Practicing Concepts, Predictions, Satellite Imagery, Winter Weather and tagged , , , , , . Bookmark the permalink.

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