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Central PA Summer 2022


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1 hour ago, Itstrainingtime said:

I have a vested (obviously) interest in the tropics right now, but for those of you who look at the long range modeling for our area, the GFS is banging an epic rain storm over the central 1/3rd of the state beginning at about the 10 day mark. Tropical system comes onshore down south and rides right up the spine of the Apps thereafter. Would be a prolific rain maker in PA for some. 

Without looking at maps, that sounds Lee-like. We got 3-4 inches of rain, while Pine Grove and points west got double digits. 

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Sorry for the continued Arizona intrusion, but this kind of event is fairly rare for the low desert Phoenix metro area, and the fact that I'm here to see it is pretty cool...

A snippet from the NWS PHX afternoon discussion.

Heading into Friday, the upper level low will remain just to the
south of the forecast area, continuing to advect a very moist
airmass into the area. During the day Friday, PWAT values for
south- central Arizona will rise to 2-2.25" with lower values west
of the Colorado River. These are exceptionally high values for
any time of the year, and are near the 99th percentile of the
NAEFS climatology. Meanwhile, a trough will develop northwest of
the forecast area introducing increased wind shear and diffluence
aloft, especially by Saturday morning due to a well positioned jet
streak. With strongly forced ascent of a near record breaking
moist airmass, widespread moderate to heavy rain is expected to
develop during the afternoon Friday and continue at times through
Saturday, and possibly into Sunday morning.

In terms of timing, the most likely period for heavy rain will be
Friday afternoon into Saturday morning for south-central Arizona. A
secondary push of heavy rain may develop Saturday evening into
Sunday morning for Gila County and potentially Maricopa County as
well. WPC QPF totals are impressive, with 0.75"-3" expected for
Maricopa, northwest Pinal, and Gila Counties.
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5 minutes ago, Voyager said:

Sorry for the continued Arizona intrusion, but this kind of event is fairly rare for the low desert Phoenix metro area, and the fact that I'm here to see it is pretty cool...

A snippet from the NWS PHX afternoon discussion.

Heading into Friday, the upper level low will remain just to the
south of the forecast area, continuing to advect a very moist
airmass into the area. During the day Friday, PWAT values for
south- central Arizona will rise to 2-2.25" with lower values west
of the Colorado River. These are exceptionally high values for
any time of the year, and are near the 99th percentile of the
NAEFS climatology. Meanwhile, a trough will develop northwest of
the forecast area introducing increased wind shear and diffluence
aloft, especially by Saturday morning due to a well positioned jet
streak. With strongly forced ascent of a near record breaking
moist airmass, widespread moderate to heavy rain is expected to
develop during the afternoon Friday and continue at times through
Saturday, and possibly into Sunday morning.

In terms of timing, the most likely period for heavy rain will be
Friday afternoon into Saturday morning for south-central Arizona. A
secondary push of heavy rain may develop Saturday evening into
Sunday morning for Gila County and potentially Maricopa County as
well. WPC QPF totals are impressive, with 0.75"-3" expected for
Maricopa, northwest Pinal, and Gila Counties.

Wouldn’t this lead to catastrophic flooding outside the city? I know areas of AZ and NM if they get more than. .5” flooding can be very bad due to the canyons and soil matter. 

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25 minutes ago, canderson said:

MDT reported .03”. 

I am guessing that is wrong but not sure the 3" is right either.   I have on the ground spotter reports all around MDT in the .5-1" range.  Have a Weather underground reporter right outside the airport reporting 1.49".  The reports on weather underground can be suspect but usually not to the high side. 

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51 minutes ago, Voyager said:

Sorry for the continued Arizona intrusion, but this kind of event is fairly rare for the low desert Phoenix metro area, and the fact that I'm here to see it is pretty cool...

A snippet from the NWS PHX afternoon discussion.

Heading into Friday, the upper level low will remain just to the
south of the forecast area, continuing to advect a very moist
airmass into the area. During the day Friday, PWAT values for
south- central Arizona will rise to 2-2.25" with lower values west
of the Colorado River. These are exceptionally high values for
any time of the year, and are near the 99th percentile of the
NAEFS climatology. Meanwhile, a trough will develop northwest of
the forecast area introducing increased wind shear and diffluence
aloft, especially by Saturday morning due to a well positioned jet
streak. With strongly forced ascent of a near record breaking
moist airmass, widespread moderate to heavy rain is expected to
develop during the afternoon Friday and continue at times through
Saturday, and possibly into Sunday morning.

In terms of timing, the most likely period for heavy rain will be
Friday afternoon into Saturday morning for south-central Arizona. A
secondary push of heavy rain may develop Saturday evening into
Sunday morning for Gila County and potentially Maricopa County as
well. WPC QPF totals are impressive, with 0.75"-3" expected for
Maricopa, northwest Pinal, and Gila Counties.

It's pretty interesting seeing that much rain fall there. I went to Phoenix when I was 14 once and we went there when it was during monsoon season so it rained a few days there. I still thought the heat there was overrated compared to a hot and humid day in central PA though lol

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1 hour ago, Bubbler86 said:

I am guessing that is wrong but not sure the 3" is right either.   I have on the ground spotter reports all around MDT in the .5-1" range.  Have a Weather underground reporter right outside the airport reporting 1.49".  The reports on weather underground can be suspect but usually not to the high side. 

CXY reports 0” as does my boss in New Cumberland. 

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1 hour ago, canderson said:

Wouldn’t this lead to catastrophic flooding outside the city? I know areas of AZ and NM if they get more than. .5” flooding can be very bad due to the canyons and soil matter. 

I don't know. I guess it depends on if those numbers are spread out over many hours, or if it falls in a couple of major bursts. 

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