Area Forecast Discussion
Issued by NWS

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary On
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
000
FXUS61 KPBZ 241157
AFDPBZ

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PITTSBURGH PA
757 AM EDT THU JUL 24 2014

.SYNOPSIS...
DRY AND COOLER WEATHER WILL CLOSE THE WORK WEEK...WITH SHOWER AND
THUNDERSTORM CHANCES RETURNING FOR THE WEEKEND.

&&

.NEAR TERM /UNTIL 6 PM THIS EVENING/...
NO MAJOR CHANGES WERE NEEDED FOR THE POST DAWN UPDATE AS BLDG SFC
HIGH UNDR UPR TROFG SHUNTS COOLER AND DRIER AIR OVR THE
REGION...AND PUSHES LINGERING PCPN CHCS IN VCNTY OF MGW SWD.

TEMPS WERE FORECAST NRLY 10 DEG UNDR THE AVGS GIVEN COLD ADVCTN
AND STRATOCU EXPECTATIONS WITH LOW...BUT CAPPED CONVECTIVE
THRESHOLDS.

&&

.SHORT TERM /6 PM THIS EVENING THROUGH SATURDAY/...
HIGH PRESSURE AT THE SURFACE AND NORTHWEST FLOW ALOFT WILL
PROVIDE A COMFORTABLE FRIDAY WITH PLENTY OF SUNSHINE.

MORE ZONAL FLOW IS PROJECTED BY SATURDAY IN RESPONSE TO LOW PRES
DIGGING TWD THE NRN PLNS. SWD DIPPING JET IS LIKELY TO INCRS DEEP
LYR SHEAR OVR THE REGION AND CONT TO SPPRT TSTM CHCS SHOULD
TIMING/INSTRABILITY PARAMETERS COOPERATE.

&&

.LONG TERM /SATURDAY NIGHT THROUGH WEDNESDAY/...
PHASING OF THE AFOREMENTIONED LOW WITH A JAMES BAY LOW IS
PROGGED TO DVLP A HIGH AMPLITUDE TROF OVR THE ERN CONUS. GENLY DRY
AND COOL CONDITIONS ARE THUS THE TREND FOR THE EXTENDED PD.

&&

.AVIATION /11Z THURSDAY THROUGH MONDAY/...
MVFR AND LOW END VFR STRATOCU DVLPMNT IS ANTICIPATED TDA AS COLD
AVCTN CONTS OVR THE UPR OH REGION. DRY ADVCTN AND WEAKENING FLOW
BY LATE DAY WL SPPRT MORE DECISIVE VFR...WHICH WL CONT THROUGH FRIDAY.

OUTLOOK.../FRIDAY THROUGH MONDAY/...
RESTRICTIONS ARE LIKELY LATER SATURDAY AND SUNDAY AS LOW PRES
SPREADS SHWRS AND TSTMS OVR THE UPR OH REGION. THE POTENTIAL WL
CONT INTO MONDAY WITH PASSAGE OF THAT SYSTEMS CDFNT.

&&

.PBZ WATCHES/WARNINGS/ADVISORIES...
MD...NONE.
OH...NONE.
PA...NONE.
WV...NONE.

&&

$$

15



USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.