July 6th, 2018 USA Forecast
Northeast & Mid-Atlantic
A shortwave trough will move out of the upper plains and into the Northeast and Mid-Atlantic regions in the form of a cold front on Friday. This will trigger the chance of some showers and thunderstorms, some which may be severe. Areas of Western and Central Pennsylvania will have a higher risk of these types of storms as hot and humid conditions will provide the explosive lift needed to set off these storms. Heavy rain, frequent lightning, and the chance of small to medium-sized hail with strong, gusty winds is likely across these areas as the energy moves to the east. Temperatures in the northeast and Mid-Atlantic will top out in the mid to upper 90’s in many spots prior to the arrival of the shortwave. After the storms move through, we could see a diminishing of the humid conditions, with temperatures dropping into the low 60’s into many spots for Friday night.
Ohio Valley & Great Lakes
The energy moving into the Northeast will be departing this area through tonight and will leave it slightly cooler in the area, with minimal chances of storms, if any at all. Temperatures will reach the upper 80’s to low 90’s in spots, with cooler conditions towards the coastlines.
Hit and miss thunderstorms will be the general pattern here in the southeast, as hot and humid conditions will continue to persist through Friday. Some of these storms will be severe, with the chance of a stray tornado or two. Storms have the potential to produce small hail, strong winds, as torrential rainfall. Highs with generally top out in the mid to upper 90’s throughout the area, with a few areas reaching 100+. Thunderstorms will be most prevalent during the afternoon, deriving mostly from daytime heating and fizzling out towards the end of the day. Lows will generally be in the upper 70’s with humidity lasting through the nighttime hours.
The shortwave trough will dig towards the central plains as we work our way through Friday, setting off some showers and thunderstorms along the frontal boundary. However, the frontal boundary will become stationary as we go through the day, with the focus of stronger storms along the immediate front. A few storms will pop up during the heating of the day across the general region, with a few severe storms possible, but being the exception, not the rule. Areas to the north will top out in the 90’s, while southern areas into Texas may reach 100+. Nighttime temperatures will be in the mid 70’s to the north, and lower to mid 80’s to the south. Humid conditions will persist into the night, with some storms lasting into Saturday morning.
Desert Southwest & California
A few thunderstorms may bubble up in areas of Arizona and New Mexico during the daytime heating hours, with temperatures in the general area of the southwest reaching 110-115 degrees. Any storms that form may produce very frequent lightning. California will remain dry, with a frontal boundary remaining off shore but producing no moisture. Temperatures across the state will range from the upper 90’s to 100 areas east, to 70-75 towards the coast and areas north and west.
A frontal boundary offshore will bring a few showers into the area, with temperatures into the low to mid 60’s across the area due to general cloudiness. Low temperatures will reach to low 50’s in some spots. The frontal boundary will continue to move onshore during the day and through the night, increasing the chances of rain through the overnight.
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