MU's Current Conditions: (at 01:10) Temp: 58 F | Dew Point: 47 | Wind: SSW - 3 mph
SPECIAL WEATHER DISCUSSION (Updated twice weekly, but more often when storms threaten.)

* It's a "Rinse and Repeat" Kind of Pattern *

Tuesday, April 16, 2019:
The weather pattern remains "very April." An active jet stream with frequent showers and spells of severe weather; late season snow in the usual places...glancing shots of cold air in others; and the occasional teaser of early summer-like conditions with highs in the upper 70s to 80s in spots. That's been the pattern across the country the past 15 days...and it will continue for the rest of the month as well.

Locally, we have a delightful Tuesday unfolding with sunshine and seasonal temps. However, clouds will slowly gather late today into Wednesday as a front develops over the region. To the north a chilly high pressure will push low-level cool air into eastern PA, while deep southwesterly flow will drive warm, humid air towards western PA. Lancaster is stuck on the line of scrimmage of this cloud-producing battle. Thursday will be interesting as we will begin the day on the cloudy, damp, cool side of the boundary; however, the front may lift north in the afternoon allowing some sunshine to develop...and lift temps to 70 (perhaps above) by late in the day. We'll see.

Friday will feature a large storm forming across the MS/ON/TN Valleys with rain and thunderstorms headed our way. I expect a steady rain at first (arriving midday Friday), then a transition to showers and thunderstorms Friday evening/night. Temps and dew points will be almost summer-like...and some heavy downpours and flooding are possible, too.

Saturday is tricky, but this kind of system often brings a "surprise" dry slot with a period of sunshine and drier conditions--this could be our reality Saturday midday or afternoon--before clouds and showers return late Saturday into the first half of Sunday. This large storm will be slow moving, but optimistically it will exit by later Sunday. If so, the weekend will end on a partly sunny and cooler note late Sunday.

Next week? More of the same, I'm afraid. A couple of warm days to start the week, then likely another trough with clouds, April showers, and a couple of cooler days. Rinse. Repeat. --Horst

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