Utah Weather:  10/13/17

Yesterday was mostly sunny, warm and pleasant.  We drove from Rio Rancho, NM, to Moab, UT, where we will spend the weekend.

This morning in Moab, it has been sunny, cold and still.

National Weather Service (NWS) in Grand Junction, CO,  forecasts (for Moab) a sunny day, with a high temperature of 77 F.  The winds will be light in the morning, then from the west southwest at 10-15 mph.  This evening will be mostly clear, with a low temperature of 41 F. Winds will be south southwest at 5-15 mph.

The NWS in Salt Lake City, UT, forecasts (for Salt Lake City) a sunny day, with a high temperature of 63 F. The winds will be from the southeast at 5-13 mph, becoming west in the afternoon.  This evening will be mostly cloudy, with 20% chance of snow, and a low temperature of 40 F. Winds will be from the northwest at 7-12 mph, increasing to 13-18 mph after midnight.

The NWS in Salt Lake City, UT, forecasts (for St. George) a sunny day, with a high temperature of 79 F.  The winds will be light and variable, becoming west southwest at 5-8 mph in the afternoon.  This evening will be clear, with a low temperature of 45 F. Winds will be from the west southwest at 6-11 mph, becoming light and variable after midnight.

The visible satellite imagery shows no clouds over the state so far this morning.  This image has been excluded from today’s post.

The infrared satellite imagery shows no thick clouds over the state this morning.  This image has been excluded from today’s post.

The water vapor imagery shows a swath of moisture passing through the southern part of the state ahead of the trough.  It is much damper aloft here in Moab than it was in Salt Lake City, as shown by the sounding in the next paragraph.

The 12Z sounding from Salt Lake City shows a dry atmosphere this morning.  There was 0.19 inches of precipitable water present in the column this morning.  There was no Convective Available Potential Energy (CAPE) and no of Convective Inhibition (CINH) present.  There was a broad thermal inversions near the surface, and the 0-3 km average lapse rate was 4.5 C/km.

The hodograph shows that there was 10 kt of low-level shear (mostly due to directional changes) and 80 kts of deep-layer shear (mostly due to speed changes).

The surface observations (from the SPC Mesoscale Analysis Map) show cold temperatures and low humidity, (based on the surface dewpoint depressions).  The winds are light, and the skies are clear over most of the state.

The surface pressure chart shows that there are no strong pressure systems or gradients over the state so far this morning.  The RAP shows the pressure will decrease, statewide, with diurnal heating, but no strong pressure systems or gradients are expected to develop over the next six hours.

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

The 500 mb NAM chart shows no strong vorticity advection over the state today.  This image has been excluded from today’s post.

The 700 mb NAM chart shows some rapidly-rising air in the northern part of the state, including over Salt Lake City.

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 very little chance of precipitation over the state today.  This chart has been excluded from today’s post.

I expect a pleasant day followed by a cool evening here in Moab.  We are car camping, so we will need to bundle up tonight, but will enjoy the warm sun during the daytime hours.

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, Photography, Practicing Concepts, Predictions, Satellite Imagery and tagged , , , , , , , . Bookmark the permalink.

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