Wind speeds lowering & so will temperatures through the week
A deep low pressure system brought heavy rain and strong wind gusts Sunday and Monday. Wind speeds should be much lower by Tuesday, and so will temperatures by late week and the upcoming weekend.
(IMAGE GALLERY ABOVE: #1. DAY PLANNER FOR TUESDAY.......#2. NEAR RECORD PRESSURE READINGS FOR CHATTANOOGA......#3. SURFACE WEATHER MAP OF THE 1978 GREAT MIDWEST BLIZZARD)
NEAR PRESSURE RECORD
The center of low pressure that slowly moved across the viewing area Sunday Evening dropped the barometric pressure at Lovell Field in Chattanooga to 983.4 mb. Hourly readings show that Dalton, GA bottomed out at 981 mb Sunday Evening. According to the National Weather Service in Morristown, this was close to a record low pressure reading in Chattanooga. The record lowest was 982.4 mb in late January of 1978 as the Great Midwest Blizzard was developing. That storm also brought rain and strong gusts locally, but not snow.
Tropical Storms typically have pressure readings in the 980s & 990s mb. So, it's no surprise that peak gusts at Lovell Field were 43 mph Sunday and 46 mph Sunday. The average barometric pressure for a minimal hurricane is 980mb.
NOT AS WINDY TUESDAY
As high pressure continues to build in (which raises surface pressure levels), the northwesterly breezes should continue Monday Night. Some gusts at times, but the speeds should decrease through the night. As the high pressure settles in on Tuesday, local wind speeds should range around 10mph.
Clouds Tuesday Morning should give way to some sun during the afternoon with high temperatures in the mid 50s.
AFTERNOON SHOWERS WEDNESDAY
Clouds should stream back in on Wednesday on advance of a cold front. As the front moves through during the late afternoon and evening some showers could occur. Rainfall amounts should be light at 0.25" or less.
COLDER LATE WEEK
As mentioned in earlier posts, it should feel more like late January as a seasonal chill returns starting Thursday. Some light rain early Thursday, then a mix of sun and clouds the rest of the day with highs in the 40s. A cold pattern should continue for Friday and the weekend with daily highs in the mid 40s and morning lows in the upper 20s to near 30.
Mainly dry through the weekend. The GFS model depicts a weak system moving across the Great Lakes and Ohio Valley could bring some light rain/snow showers late Sunday Night and early Monday. But, any amounts look very light. The European Model shows only very light wintry precipitation. So, we'll keep an eye on a snow shower chance Sunday Night through Monday Morning.
As always, you can depend on the StormTrack 9 Team for updates!