We drove from Socorro, NM to Minneapolis, MN, over the last day or so. We traveled through cold, windy conditions, and then flurries once we were north of I-35.
This morning has been cloudy, cold and still.
National Weather Service (NWS) at Twin Cities/Chanhassen forecasts (for Minneapolis) a cloudy day, with a high temperature of 37 F. The winds will be from the northwest at 5 mph. This evening will be cloudy, with a low temperature of 29 F. Winds will be southeast at 10 mph, gusting to 20 mph.
The NWS in Duluth forecasts (for Duluth) a mostly sunny day, with a high temperature of 29 F. The winds will be from the northwest at 15 mph. This evening will be mostly cloudy, with a low temperature of 28 F. Winds will be from the northwest at 5 mph, becoming southwest after midnight.
The visible satellite imagery shows a thin blanket of stratus clouds over most of the state this morning.
The infrared satellite imagery shows that most of these clouds are very thin, though there are two bands of thicker clouds.
The water vapor imagery shows dry air, though mostly due to the cold temperatures.
The 12Z sounding from Twin Cities shows a saturated layer between 850 mb to 800 mb. There was 0.27 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 no thermal inversion near the surface, and the 0-3 km average lapse rate was 4.9 C/km.
The hodograph shows that there was 14 kt of low-level shear (mostly due to speed changes) and 19 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 over most of the state.
There is a low pressure system over the Great Lakes, leaving a slight pressure gradient over the state. The RAP shows that the pressure will drop lightly over the next year.
Synoptically speaking, the 300 mb NAM chart (from Unisys) shows strong, northerly flow over the state today as a deep trough moves east.
The 500 mb NAM chart shows some Negative Vorticity Advection (NVA) in the southeastern corner of the state today, as some vorticity exits the state to the south.
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 precipitation is not expected over the state today. This chart has been excluded from today’s post.
Today will be cold and cloudy all day today. I guess we are getting to see typical fall weather in Minnesota.
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