CAPE

A standard PWM VFD is all that's needed for a residential well pump if you want to go that route. I'm not sure why you would need a cycloconverter for a well pump application. Those are used for really big motors and traditionally for electric propulsion on big ships- and even in those applications modern VFDs using PWM with IGBTs in the inverter section have become more common.

Grass deterioration time. Inevitable. At least the clover usually survives.

In less than 3 weeks the days start getting shorter.

Mount Holly's latest take on the severe threat for Thursday- With stalled frontal boundary remaining situated over the region, there will likely be an appreciable temperature gradient once again with cooler highs in the upper 70s for the northern half of the region and upper 80s to near 90 south of the front. The front will attempt to move northward as a warm front ahead of the incoming shortwave trough and attendant surface low. The greatest risk for severe thunderstorms remains south of the front, which looks to be mostly south of the PA Turnpike and AC Expressway (Philadelphia suburbs southward). The Storm Prediction Center has a Slight Risk for Severe Weather south of Philadelphia Thursday. With CAPE values forecast to be in the 1000 to 2000 J/kg range (perhaps upwards of 3000 J/kg MUCAPE in areas that see enough sun to the south). The greatest threats look to be hail and damaging wind with deep CAPE well above the freezing level and some modest dry air aloft leading to forecast DCAPE values from 500 to 1000 J/kg. LL shear looks to be supportive of at least some supercells initially that will morph into a broken line or QLCS.

DCA: 101 IAD: 99 BWI: 100 RIC: 102

4.03" for the month here. Just wet enough but not too wet. Mosquitoes in check, seasonal wetland almost completely dry.

Beautiful day. High of 81. Currently 78. Comfortable evening upcoming. Might be firepit time. Different story the next few days.

Sipping on a DFH 120 min IPA 2022 version on this Memorial Day Sunday. New look to the bottle, and this version tastes a bit different as well. The hops really stand out- seems crisper, but the underlying sweetness and complexity is still there owing to all that barley required to get the high ABV. This one has an abv of 16% or so, as compared to previous versions that clocked in at 18-20%. Imo the characteristics are similar to the very excellent 90 min, with more hop goodness, and more boozy, although pretty well hidden. I think this one hits the perfect balance of hoppiness and sweetness. Very good!

Gorgeous day here. Mostly sunny, breezy, and 75 currently.

Sunny and 65 here at 9am. Looks like a pretty nice day upcoming.

Don't La Nina summers favor ridging in the central US? I think it is generally 'cooler' and drier in the east. Periods of oppressive heat and humidity are inevitable in these parts.

Beyond the brief bout of heat this week, maybe not so warm for a stretch.

0.85" for the event. Some rumbles of thunder and no wind.

Nothing exciting here. A few rumbles of thunder, but some decent rain. 0.40". Still some on and off showers. Instability should be on the wane through the rest of the afternoon into the evening, but hopefully another round of showers can bring maybe an additional quarter inch. Mesos look pretty meh with the next round weakening as it moves east.

Looks increasingly warm and humid next week with a developing upper ridge. Probably at least a couple 90 degree days.

Yeah the trends overnight were towards a less progressive idea. Both the Euro and CMC moved towards the GFS depiction.

58 with just over a tenth of an inch of rain overnight. Light showers continue. GFS had the right idea- as expected the weak low struggles to get appreciable rain north of VA against the strengthening high to the NE.

Suppression depression

Yeah given the modest nature of the southern wave moving into a strengthening High, I think the GFS depiction makes more sense.

There won't be much in the way of appreciable rain from DC points N and NE. A tenth to a quarter inch is possible. That sprawling high to the north is no joke. Different story for places S and SW esp into central and southern VA.

Overnight trends are wetter for tonight into early Wed, but still looks like the heavier rain stays in Virginia and points south. Southern MD/lower eastern shore could see some significant rain. A battle between that wave moving along the stalled front to the south and the sprawling area of high pressure to our north. Still looks like the northern half of the FA will be rain free most of the time, but there will be plenty of clouds around and probably some drizzle with the flow off the Ocean.

That second line held together enough to get some needed rain here. 0.62"