Wednesday, April 18, 2012

Weather Observations April 17th & 18th

Tuesday's Weather (April17) - Clear in the morning, cloudy by evening would characterize this day.  Morning into the early afternoon hours were fairly clear with cloud cover being 20% or less.  Thin stratus and cumulus clouds moved in by mid afternoon.  Cloud cover was 80% by 7pm with the wind picking up out of the southeast.  Winds in the morning were light at 0-5MPH out of the S-SW.  By afternoon they were blowing at a steady 10MPH from the S-SE.  This led me to believe that theyre might some activity up in those clouds.  I was a little worried with the SE wind because that is typically seen a few hours before weather turns worse. 
Temperatures topped out shy of 60F in the afternoon, with a recorded temperature of 56F at 7pm.  Slightly declining pressure throughout the day too (see image below)
Wednesday's Weather (April18) - Eventually we did see some precipitation in the night but it came through very early in the morning as I saw puddles early today when walking to school.  Nice breeze for the greater part of today out of the SW-W at 10-15MPH. These winds tapered off as of 6 or 7 pm to about 5mph or less. Cloud cover between 50-60% during the noon and afternoon hours.  Mostly puffy cumulus clouds in the day, some of which were rising higher into the sky.  They almost looked as though they were on a 45 degree angle rising upwards as they moved east over Eau Claire's Water Street area.  Later on in the evening higher level cirrus clouds were seen in the west as the sun set.  Temperature at 9PM was 54F.

Here is a look at the current fronts around the US

There is an occluded front to our NE located right on the eastern portion of Lake Superior.  Heavy rain is probably associated with this Low pressure occlusion.  Winds at our location in Eau Claire seem to be funneling towards the center of that Low.  This makes sense as most of the wind today was out of the S or SW.  The rain from this morning was associated with a cold front which you can see is now making its way through Chicago and Des Moines.  Another potential for some inclement weather is seen in the Low pressure systems located along the Rocky Mountain Range.  Sporadic moisture is also seen in the South with plenty of low intensity showers in the states like Texas, Oklahoma, Louisiana, and Arkansas

Observed at Phillips Hall Eau Claire, WI 54701
   

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