191
FXUS61 KPBZ 201344
AFDPBZ
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PITTSBURGH PA
944 AM EDT MON APR 20 2026
WHAT HAS CHANGED
FREEZE WARNING IN EFFECT TONIGHT INTO EARLY TUESDAY ACROSS THE
REGION.
KEY MESSAGES
1) COLD TEMPERATURES THROUGH TUESDAY MORNING, FREEZE WARNING IN
EFFECT
2) WARMER WITH PERIODIC SHOWER CHANCES MID TO LATE WEEK
DISCUSSION
KEY MESSAGE 1...
WIDESPREAD FREEZE IS EXPECTED TONIGHT INTO TUESDAY MORNING AS
HIGH PRESSURE BUILDS, RESULTING IN DIMINISHING WIND AND
RADIATIONAL COOLING. WITH HIGH CONFIDENCE IN LOW TEMPERATURES
BELOW FREEZING TONIGHT INTO TUESDAY MORNING, A FREEZE WARNING
REMAINS IN EFFECT AREAWIDE.
KEY MESSAGE 3...
A WEAK COLD FRONT IS EXPECTED TO MOVE SOUTH ACROSS THE REGION
TUESDAY NIGHT INTO WEDNESDAY, WITH SCATTERED SHOWERS. ISOLATED
THUNDERSTORMS ARE POSSIBLE, THOUGH INSTABILITY IS PROGGED TO BE
LIMITED, AND HIGHEST WEST OF THE AREA. RIDGING SHOULD RETURN DRY
AND WARMER WEATHER FOR THURSDAY INTO EARLY FRIDAY. THE RIDGE IS
EXPECTED TO FLATTEN BY LATE WEEK INTO THE WEEKEND, WITH A MORE
ZONAL FLOW ACROSS MUCH OF THE CONUS, AND A CLOSED LOW ACROSS
SOUTH CENTRAL CANADA. WEAK SHORTWAVES EMBEDDED IN THE FLOW ARE
EXPECTED TO CROSS THE UPPER OHIO VALLEY REGION LATER FRIDAY INTO
THE WEEKEND. OCCASIONAL SHOWER CHANCES ARE EXPECTED, WITH DRY
TIME IN BETWEEN SHORTWAVES. THUNDER POTENTIAL APPEARS TO REMAIN
LOW, WITH ENSEMBLES INDICATING MINIMAL INSTABILITY.
AVIATION /13Z MONDAY THROUGH FRIDAY/
RAIN AND SNOW SHOWERS HAVE MOVED OFF TO THE SOUTHEAST, WITH THE
ONLY POTENTIAL IMPACTS AT MGW BRIEFLY BEFORE DEPARTING BY 13Z.
PRECIPITATION CHANCES ARE NULL THROUGH THE REST OF THE TAF
PERIOD.
WINDS ARE EXPECTED TO GUST UP TO 20 KNOTS BY THE AFTERNOON.
WINDS ARE EXPECTED TO ENGAGE BY 15Z TO 17Z. THE OUTLIER WILL BE
ZZV WITH LIGHTER WINDS ALOFT EXPECTED AND IN TURN, LESS WINDS
TO MIX TO THE SURFACE. VFR AND CALMING WINDS PERSIST OVERNIGHT,
WITH LIMITED IMPACTS TO TERMINALS.
OUTLOOK...
RESTRICTIONS AND SHOWER POTENTIAL RETURNS WITH A COLD FRONT
WEDNESDAY MORNING, BEFORE VFR RETURNS THURSDAY UNDER HIGH
PRESSURE.
PBZ WATCHES/WARNINGS/ADVISORIES
PA...FREEZE WARNING FROM 11 PM THIS EVENING TO 9 AM EDT TUESDAY FOR
PAZ007>009-013>016-020>022-029-031-073>078.
OH...FREEZE WARNING FROM 11 PM THIS EVENING TO 9 AM EDT TUESDAY FOR
OHZ039>041-048>050-057>059-068-069.
WV...FREEZE WARNING FROM 11 PM THIS EVENING TO 9 AM EDT TUESDAY FOR
WVZ001>004-012-021-509>514.
DISCUSSION...WM/HEFFERAN
AVIATION...MILCAREK/SHALLENBERGER
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