Thursday, November 10, 2022

Big changes coming: Temperatures tumble, plus the tropics aren’t done

If you’ve found yourself wishing away the unseasonably warm temperatures we’ve had this fall, you’re going to enjoy the changes headed our way! We have a pretty active weekend ahead of us.

First: The Tropics

Nicole made landfall just south of Vero Beach, Florida early Thursday morning as a category one hurricane with estimated wind speeds of 75 miles per hour. The current National Hurricane Center Track takes Nicole through central Georgia on Friday and to the northeast towards New England by Saturday. While most of the tropical system’s impacts will remain well to our east, north MS and west TN might see some clouds filter in and winds pick up a bit on Friday as the low makes its northern turn through Georgia.

Nicole stays well to our east as it moves up the east coast and a strong cold front approaches from the plains. (Pivotal Weather)



Big temperature swing coming...

More rural areas have already seen sub-freezing temperatures, but this weekend will likely bring our first sub-freezing temperatures in the city itself. Our main story starting Friday is a strong cold front brought about by an upper-level trough swinging through the eastern U.S. As of lunchtime on Thursday, the cold front was draped from Wisconsin down through Oklahoma and continues to push eastward.  The front will be approaching the metro Friday evening, ushering in borderline-winter-like temperatures, and the cold is here to stay this time. A strong northerly wind will pick up in the wake of the front, and temperatures will drop to the mid-30s Friday night with showers likely, but probably not until after high school football playoff games end for the evening! Precipitation from the front itself will dissipate as it approaches the metro, but a weak upper level disturbance following just after will bring rainfall in from the southwest.

Nicole stays well to our east as it moves up the east coast and a strong cold front approaches from the plains. (Pivotal Weather)

Here’s a still shot from the HRRR of surface temperatures at 6pm on Friday as the front approaches the metro. (Pivotal Weather)


Now, I tread carefully with this one, but areas northwest of us in NE Arkansas have the potential to see some sleet/wintry mix in the pre-dawn hours Saturday morning as cold air rushes in. Rest assured, surface temperatures will still be above freezing so there will be little to no impact. I’m not expecting too much in the way of precipitation amounts - maybe a tenth to a quarter of an inch with slightly higher amounts well to the south of the metro. Saturday night, lows to drop to around 30, so remember to cover your plants and bring your four-legged friends inside. Don’t be caught without a coat this weekend as temperatures won’t make it out of the 40s during the daytime despite sunshine. Thankfully these overnight temperatures aren’t quite cold enough to warrant more extreme precautionary measures, such as dripping faucets or covering outdoor pipes.



Early next week

Temperatures start to creep back up into the 50s on Monday, which is actually when our next chance for rain presents itself. A strong upper level trough pushes its way across the U.S. early next week, bringing about a storm system across the southern Plains into the Mid-South. Our chances for rain extend from Monday night into early Tuesday morning. Right now I’m looking for somewhere between a quarter and a half of an inch of precipitation with areas south of Memphis (again) receiving higher amounts. Rain gives way to a drier pattern in the middle of the week, but cooler temperatures stick around with highs in the upper 40s/low 50s through the end of the week.

The upper level disturbance responsible for our rain chances on Monday night can be seen over northern TX on this forecast map of the atmosphere at about 18,000 feet up. (Pivotal Weather)

Caroline Sleeper
MWN Meteorologist

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Monday, November 7, 2022

October 2022 Climate Report for Memphis, TN

October Climate Recap

Temperatures for the month of October in Memphis averaged just below normal, though the number of above and below average days were fairly equal. Most of the above average days were in the last third of the month, while a cold spell mid-month (highs in the 50s) helped to skew the monthly average down. Despite the swings in temperatures, there were no days that reached 90 degrees.

The temperature anomaly map for the month of October shows slightly below average temperatures across the Mid-South. (PRISM temperature data via WeatherModels)

Drought conditions continued early in the month with no precipitation until mid-month, when a couple of wet systems moved through dropping a couple of inches of rain as well as producing thunderstorms. After another dry spell, rainfall returned again in the past week of the month, including the wettest day in over 18 months at the airport on the 29th with 2.37" of rain. The thunderstorms on the 12th resulted in a couple of reports of hail in northwest MS. Severe Thunderstorm Warnings were issued on the 15th for storms moving through Tipton County though there were no reports of severe weather. 

Memphis International Airport, Memphis, TN

Temperature 
Average temperature: 63.2 degrees (1.4 degrees below average) 
Average high temperature: 74.5 degrees (0.6 degrees below average) 
Average low temperature: 51.9 degrees (2.1 degrees below average) 
Warmest temperature: 85 degrees (6th, 12th) 
Coolest temperature: 35 degrees (19th) 
Heating Degrees Days: 102 (14 below average)
Cooling Degree Days: 54 (48 below  average) 
Records set or tied: None
Comments: No days reached 90 degrees this month, which is 0.9 below the average October. 

Precipitation 
Monthly total: 4.82" (0.84" above average) 
Days with measurable precipitation: 6 (1.5 days below average) 
Wettest 24-hour period: 2.37" (29th) 
Snowfall: 0.0"
Records set or tiedDaily maximum rainfall set on the 29th (2.37")
Comments: None 

Miscellaneous 
Peak wind: Northwest/46 mph (12th) 
Average wind: 7.9 mph 
Average relative humidity: 58%
Average sky cover: 31%

 Click here for a daily statistical recap for Memphis International Airport.
 

Cirrus Weather Solutions / MemphisWeather.net, Bartlett, TN

Temperature 
Average temperature: 60.6 degrees 
Average high temperature: 75.0 degrees 
Average low temperature: 48.4 degrees 
Warmest temperature: 87.9  degrees (12th) 
Coolest temperature: 29.3 degrees (19th) 
Comments: None 

Precipitation 
Monthly total: 2.77" (automated rain gauge), 2.90" (manual CoCoRaHS rain gauge) 
Days with measurable precipitation: 5
Wettest date: 1.60" (29th) (via automated gauge) 
Snowfall: 0.0"
Comments: None

Miscellaneous 
Peak wind: Southeast/29 mph (29th)
Average relative humidity: 66% 
Average barometric pressure: 30.07 in. Hg
Comments: None

Click here for a daily statistical recap for Bartlett, TN.
 

MWN Forecast Accuracy

MWN average temperature error: 1.78 degrees 
MWN forecast temperatures within 2 degrees of actual: 78% 
MWN average dewpoint error: 1.98 degrees 
MWN forecast dewpoints within 2 degrees of actual: 81% 

MWN's forecasts extend out five periods (2.5 days, or roughly 60 hours). Historical accuracy statistics can be found here.

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Follow MWN on Facebook and Twitter for routine updates and the latest info! 
Complete MWN Forecast: MemphisWeather.net on the mobile web or via the MWN mobile app 
Download our iPhone or Android apps, featuring StormWatch+ severe weather alerts!
MWN is a NOAA Weather Ready Nation Ambassador Meteorologist Erik Proseus is an NWA Digital Seal Holder