Wind Chill Warning 1, NWS Pittsburgh, PA

Belmont County, OH, Carroll County, OH, Columbiana County, OH, Coshocton County, OH, Guernsey County, OH, Harrison County, OH, Jefferson County, OH, Monroe County, OH, Muskingum County, OH, Noble County, OH, Tuscarawas County, OH, Allegheny County, PA, Armstrong County, PA, Beaver County, PA, Butler County, PA, Clarion County, PA, Fayette County, PA, Forest County, PA, Greene County, PA, Jefferson County, PA, Lawrence County, PA, Mercer County, PA, Venango County, PA, Washington County, PA, Westmoreland County, PA, Brooke County, WV, Hancock County, WV, Marion County, WV, Marshall County, WV, Monongalia County, WV, Ohio County, WV, Preston County, WV, Tucker County, WV, Wetzel County, WV

Area Forecast Discussion
National Weather Service Pittsburgh PA
820 AM EST Thu Dec 22 2022

.SYNOPSIS...
Multiple weather hazards are expected through the holiday
weekend in conjunction with approaching low pressure: Rain in
the lowlands, freezing rain in the ridges today will give way
to a rapid temperature fall early Friday, a changeover to snow,
and a flash freeze concern which will impact the Friday morning
commute. Potentially record-breaking low maximum temperature and
increasing wind gusts will promote dangerous wind chill
concerns, with continued snow showers lingering through the
holiday weekend.

&&

.NEAR TERM /THROUGH TONIGHT/...
Recent radar imagery suggests precipitation overspreading most
of the region this morning as a warm front advances northward
ahead of the well-advertised, deepening closed low across the
Dakotas. Surface observations across the lowlands are generally
above freezing. However, dry low levels may cool temperatures
slightly, which could introduce a brief period of wintry mix
before rain showers prevail as warm, moist air advances.

For the eastern ridges, easterly flow should maintain
subfreezing surface temperature. Webcams and surface
observations portray an ongoing threat for freezing rain and
wintry mix, which will likely persist into this afternoon. As
such, the Winter Storm Warning and Winter Weather Advisory
remain in effect to address this threat.

The forecast area will remain within that low pressure's warm
sector through the remainder of the period, and an increasing
southwesterly oriented jet should support an eventual changeover
to all rain later today. High-resolution guidance suggests a
brief reprieve in precipitation potential by early evening,
though this will be short-lived as an Arctic cold front
approaches after midnight.

Strong frontogenetic forcing, coinciding with cold advection
associated with a ~503 dam closed low, will introduce an intense
changeover from rain to snow through the pre-dawn hours.

&&

.SHORT TERM /FRIDAY/...
With the passage of the cold front expect the following:

1. Wind gusts will increase to 35-45 mph early Friday morning,
40-50 mph during the afternoon. Sustain winds of 20-25mph are
likely. With steep low level lapse rates, due to strong cold
advection, 850mb winds (45-50kts) will have no trouble mixing to
the surface. Have issued a high wind watch for the entire area
for late tonight until Saturday morning.

2. Temperatures will drop 20 degrees in a short time frame
(within 3-4 hours), creating a flash freeze risk. Note: With
the combination of high wind gusts and single digit
temperatures, wind chill values should also fall below zero.
A Wind Chill Watch remains in effect across the entire area.
The Watch will likely be upgraded to Advisory/Warning once
there is high confidence in the timing. There is high
confidence that the ridges will reach the threshold for a
Warning. Elsewhere, the lowest wind chill value is -20F near
I-80.

3. A sudden change in precipitation type will occur along the
frontal boundary, rain changing to snow. With strong
frontogenesis along the cold front, there is a chance of an
intense snow band that would advance west to east prior and during
the Friday morning commute. There remains disagreement between
the models on the amount and duration of the snowfall. All of
the models have decreased the total snowfall as the higher qpf
swings rapidly northward ahead of the deepening surface low.
Hires models are indicating the shortest duration of snow while
the larger scale models are holding on to the snow into the late
morning and early afternoon hours. A general 1 to 3 inches looks
good for the morning, with additional accumulations in the I-80
corridor through the afternoon.

By Friday afternoon snow showers should be confined to the I-80
corridor as the LES machine gets cranking.

&&

.LONG TERM /FRIDAY NIGHT THROUGH WEDNESDAY/...
The big story through the weekend will remain the bitter cold
and dangerous wind chills. Would expect wind chill headlines to
continue, possibly into Sunday, for at least a portion of the
area. Winds should finally start to relax late Saturday and into
Sunday as the surface pressure gradient lessens.

The cold air will linger through Monday, with early morning
lows in the single digits.

Temperatures will gradually improve next week, ranging near the
climatological average.

&&

.AVIATION /13Z THURSDAY THROUGH MONDAY/...
Rapid cig deterioration to low VFR/IFR will persist across all
ports as a warm front advances northward across the region.

With dry lower levels and moist advection in swly flow aloft,
wet-bulbing effects may introduce a bout of a freezing
rain/wintry mix, mainly north of I-80 (FKL and DUJ) and in LBE.
The eventual changeover to all rain is expected by afternoon as
warm advection persists, supported by a strong, lower level
southwesterly jet, which may also promote llws concerns during
the afternoon where precipitation is not occuring. Diurnal
mixing within the warm sector may support a brief improvement
in cig heights toward low VFR by late aftn/early eve.

Unfavorable flight conditions are anticipated after midnight as
a strong arctic cold front crosses the region; with a rapid
changeover from rain to snow expected as well as increasing
westerly winds gusts, and potential for flash freeze concerns
through Friday morning. MVFR/IFR Cig and vis restrictions in
snow are expected.

.OUTLOOK....
Closed low pressure across the Great Lakes will maintain
widespread restrictions in snow showers, cigs, and strong wind
gusts through the holiday weekend.

&&

.CLIMATE...
Several climate sites have the potential to set new record low
maximum temperature for Christmas Eve (December 24th):

                   Record                  Dec 24th
Site               Low Max     Year      Forecast Max
----------------------------------------------------
Pittsburgh Intl      13        1983          11
Zanesville           13        1983          11
Morgantown           15        1983          13
Wheeling             17        1906          11
New Philadelphia     11        1960          11

&&

.PBZ WATCHES/WARNINGS/ADVISORIES...
PA...High Wind Watch from late tonight through Saturday morning for
     PAZ007>009-013>016-020>023-029-031-073>076.
     Wind Chill Watch from Friday morning through Saturday
     afternoon for PAZ007>009-013>016-020>023-029-031-073-075.
     Winter Weather Advisory until noon EST today for PAZ023-074-
     076.
     Wind Chill Watch from Friday morning through Saturday evening
     for PAZ074-076.
OH...High Wind Watch from late tonight through Saturday morning for
     OHZ039>041-048>050-057>059-068-069.
     Wind Chill Watch from late tonight through Saturday afternoon
     for OHZ039>041-048>050-057>059-068-069.
WV...High Wind Watch from late tonight through Saturday morning for
     WVZ001>004-012-021-509>514.
     Wind Chill Watch from Friday morning through Saturday
     afternoon for WVZ001>004-012-021-509.
     Winter Weather Advisory until noon EST today for WVZ512.
     Wind Chill Watch from Friday morning through Saturday evening
     for WVZ510>514.
     Winter Storm Warning until 6 PM EST this evening for WVZ514.

&&

SYNOPSIS...05
NEAR TERM...05
SHORT TERM...22
LONG TERM...22
AVIATION...05
CLIMATE...

Hazardous Weather Outlook
National Weather Service Pittsburgh PA
332 AM EST Thu Dec 22 2022

WVZ510-511-513-230845-
Ridges of Eastern Monongalia and Northwestern Preston-Preston-
Western Tucker-
332 AM EST Thu Dec 22 2022

...HIGH WIND WATCH IN EFFECT FROM LATE TONIGHT THROUGH SATURDAY
MORNING...
...WIND CHILL WATCH IN EFFECT FROM FRIDAY MORNING THROUGH SATURDAY
EVENING...

This Hazardous Weather Outlook is for northern West Virginia.

.DAY ONE...Today and tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   High Wind Watch.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   High Wind Watch.
   Wind Chill Watch.

A winter storm will move through the region Friday, and bring rain
then snow, followed by extremely cold temperatures and elevated wind
gusts. Possible impacts include travel delays, power outage, wind
damage, frostbite.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to Standard Operating Procedures.

OHZ039>041-048>050-057>059-068-069-230845-
Tuscarawas-Carroll-Columbiana-Coshocton-Harrison-Jefferson OH-
Muskingum-Guernsey-Belmont-Noble-Monroe-
332 AM EST Thu Dec 22 2022

...HIGH WIND WATCH IN EFFECT FROM LATE TONIGHT THROUGH SATURDAY
MORNING...
...WIND CHILL WATCH IN EFFECT FROM LATE TONIGHT THROUGH SATURDAY
AFTERNOON...

This Hazardous Weather Outlook is for east central Ohio.

.DAY ONE...Today and tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   High Wind Watch.
   Wind Chill Watch.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   High Wind Watch.
   Wind Chill Watch.

A winter storm will move through the region Friday, and bring rain
then snow, followed by extremely cold temperatures and elevated wind
gusts. Possible impacts include travel delays, power outage, wind
damage, frostbite.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to Standard Operating Procedures.

PAZ007>009-013>016-020>022-029-031-073-075-WVZ001>004-012-021-509-
230845-
Mercer-Venango-Forest-Lawrence-Butler-Clarion-Jefferson PA-Beaver-
Allegheny-Armstrong-Washington-Greene-Westmoreland-Fayette-Hancock-
Brooke-Ohio-Marshall-Wetzel-Marion-Monongalia-
332 AM EST Thu Dec 22 2022

...HIGH WIND WATCH IN EFFECT FROM LATE TONIGHT THROUGH SATURDAY
MORNING...
...WIND CHILL WATCH IN EFFECT FROM FRIDAY MORNING THROUGH SATURDAY
AFTERNOON...

This Hazardous Weather Outlook is for western Pennsylvania, and
northern West Virginia.

.DAY ONE...Today and tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   High Wind Watch.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   High Wind Watch.
   Wind Chill Watch.

A winter storm will move through the region Friday, and bring rain
then snow, followed by extremely cold temperatures and elevated wind
gusts. Possible impacts include travel delays, power outage, wind
damage, frostbite.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to Standard Operating Procedures.

WVZ514-230845-
Eastern Tucker-
332 AM EST Thu Dec 22 2022

...WINTER STORM WARNING IN EFFECT UNTIL 6 PM EST THIS EVENING...
...HIGH WIND WATCH IN EFFECT FROM LATE TONIGHT THROUGH SATURDAY
MORNING...
...WIND CHILL WATCH IN EFFECT FROM FRIDAY MORNING THROUGH SATURDAY
EVENING...

This Hazardous Weather Outlook is for northern West Virginia.

.DAY ONE...Today and tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Winter Storm Warning.
   High Wind Watch.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   High Wind Watch.
   Wind Chill Watch.

A winter storm will move through the region Friday, and bring rain
then snow, followed by extremely cold temperatures and elevated wind
gusts. Possible impacts include travel delays, power outage, wind
damage, frostbite.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to Standard Operating Procedures.

PAZ074-076-WVZ512-230845-
Higher Elevations of Westmoreland-Higher Elevations of Fayette-
Eastern Preston-
332 AM EST Thu Dec 22 2022

...WINTER WEATHER ADVISORY IN EFFECT UNTIL NOON EST TODAY...
...HIGH WIND WATCH IN EFFECT FROM LATE TONIGHT THROUGH SATURDAY
MORNING...
...WIND CHILL WATCH IN EFFECT FROM FRIDAY MORNING THROUGH SATURDAY
EVENING...

This Hazardous Weather Outlook is for southwest Pennsylvania and
northern West Virginia.

.DAY ONE...Today and tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Winter Weather Advisory.
   High Wind Watch.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   High Wind Watch.
   Wind Chill Watch.

A winter storm will move through the region on Friday, and bring
rain then snow, followed by extremely cold temperatures and elevated
wind gusts. Possible impacts include travel delays, power outage,
wind damage, frostbite.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

PAZ023-230845-
Indiana-
332 AM EST Thu Dec 22 2022

...WINTER WEATHER ADVISORY IN EFFECT UNTIL NOON EST TODAY...
...HIGH WIND WATCH IN EFFECT FROM LATE TONIGHT THROUGH SATURDAY
MORNING...
...WIND CHILL WATCH IN EFFECT FROM FRIDAY MORNING THROUGH SATURDAY
AFTERNOON...

This Hazardous Weather Outlook is for western Pennsylvania.

.DAY ONE...Today and tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Winter Weather Advisory.
   High Wind Watch.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   High Wind Watch.
   Wind Chill Watch.

A winter storm will move through the region on Friday, and bring
rain then snow, followed by extremely cold temperatures and elevated
wind gusts. Possible impacts include travel delays, power outage,
wind damage, frostbite.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>