630
FXUS61 KPBZ 191109
AFDPBZ
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PITTSBURGH PA
709 AM EDT SUN JUL 19 2026
WHAT HAS CHANGED
FLOOD WARNINGS REMAIN IN EFFECT EARLY THIS MORNING FOR AREAS
NORTHEAST OF PITTSBURGH DUE TO RECENT HEAVY RAINFALL. ENHANCED
RISK ISSUED BY SPC FOR TUESDAY. UPDATED FOR THE 12Z TAF
ISSUANCE.
KEY MESSAGES
1) FLOOD WARNINGS REMAIN IN EFFECT THROUGH EARLY SUNDAY
2) ENHANCED RISK FOR SEVERE WEATHER ON TUESDAY; SLIGHT RISK FOR
EXCESSIVE RAINFALL
DISCUSSION
KEY MESSAGE 1...
OVER THE LAST 6 HOURS, FLASH FLOOD WARNINGS HAVE BEEN CONVERTED
TO FLOOD WARNINGS. ALTHOUGH CONDITIONS ARE CURRENTLY CLEAR AND
CALM, CREEKS AND STREAMS, PARTICULARLY NEAR RED BANK CREEK
NORTHEAST OF PITTSBURGH, MAY REMAIN ELEVATED UNTIL DAWN DUE TO
EARLIER HEAVY RAINFALL (3-4 INCHES). RED BANK CREEK NEAR
ST.CHARLES MAY NEED TO PLACED ON A RIVER FLOOD WARNING IN THE
NEXT 3-6 HOURS IF IT CRESTS ABOVE 17FT. PLEASE CONTINUE TO
RESPECT ALL ROAD CLOSURES UNTIL WATER LEVELS RECEDE.
KEY MESSAGE 2...
A POWERFUL STORM SYSTEM IS TRACKING FROM THE PACIFIC NORTHWEST
TOWARD THE GREAT LAKES OVER THE NEXT 2 DAYS. BY TUESDAY, A
COMBINATION OF HIGH ENERGY (1500J/KG TO 2500J/KG) AND STRONG
WIND SHEAR (EFFECTIVE SHEAR 35KT-45KTS) IS EXPECTED TO CREATE A
SIGNIFICANT RISK OF SEVERE STORMS ACROSS THE ENTIRE REGION,
LEADING THE STORM PREDICTION CENTER TO ISSUE AN ENHANCED RISK OR
OUR ENTIRE AREA. RESIDENTS SHOULD PREPARE FOR DAMAGING WIND
GUSTS, THOUGH TORNADOES AND LARGE HAIL ARE ALSO POSSIBLE WITH
ANY DEVELOPING SUPERCELL STORMS. A SEVERE T-STORM OR TORNADO
WATCH WILL LIKELY BE ISSUED DURING SOME PERIOD OF TIME ON
TUESDAY.
ANOMALOUSLY HIGH MOISTURE LEVELS--WITH PWATS REACHING THE 80TH
TO 90TH PERCENTILE --RAISE THE RISK OF FLASH FLOODING FOR
TUESDAY EVENING. TRAINING STORMS COULD POTENTIAL CREATE SWATHS
OF 2-4 INCHES OF RAINFALL IN A SHORT PERIOD OF TIME. THE WEATHER
PREDICTION CENTER (WPC) HAS ISSUED A SLIGHT RISK FOR PORTIONS OF
REGION. A FLASH FLOOD WATCH MAY BECOME NECESSARY PENDING
FURTHER CLARITY FROM HIGH-RESOLUTION MODEL DATA REGARDING
LOCALIZED IMPACTS.
AVIATION /12Z SUNDAY THROUGH THURSDAY/
RESIDUAL LOW LEVEL MOISTURE CONTINUES BR AT MANY PORTS THIS
MORNING. THIS IS EXPECTED TO ABATE BY MID MORNING WITH GRADUAL
IMPROVEMENTS TO OUR MVFR AND IFR CONDITIONS. SKIES ARE EXPECTED
TO LIFT AND SCATTER BY MIDDAY OR EARLY AFTERNOON AND YIELD VFR
THROUGH THE REMAINDER OF THE TAF PERIOD. A LOWER END VFR SCT TO
FEW STRATOCU DECK PREVAILS THIS AFTERNOON BEFORE ERODING NEAR
SUNSET. LIGHT WINDS OUT OF THE NORTH/NORTHWEST PREVAIL TODAY
BEFORE WINDS BECOME LIGHT AND VARIABLE TONIGHT.
VFR CONDITIONS CONTINUE TOMORROW UNDER MOSTLY SUNNY SKIES WITH
LIGHT WINDS.
OUTLOOK... RESTRICTIONS RETURN IN SHOWERS AND THUNDERSTORMS ON
TUESDAY WITH A COLD FRONT.
PBZ WATCHES/WARNINGS/ADVISORIES
PA...NONE.
OH...NONE.
WV...NONE.
DISCUSSION...HEFFERAN
AVIATION...AK
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