River Flood Warning 16, NWS Pittsburgh, PA

Area Forecast Discussion
National Weather Service Pittsburgh PA
752 AM EDT Sat Jul 29 2017

.SYNOPSIS...
Rain and flood threat will continue to trend downward through
midday. Building high pressure will return dry and seasonable
weather for the later half of Saturday through the start of the
work week.

&&

.NEAR TERM /UNTIL 8 PM THIS EVENING/...
High water will continue to cause problems over a significant
part of the forecast area.

Rain continues this morning as the upper-level low is very slow to
move southeast of the area. Wrap-around flow is continuing to pull
moisture westward into the forecast area from eastern PA. The result
of this will be very gradual dissipation of rain across our
southeastern counties.

While rain rates have generally lowered over the last several hours,
the antecedent conditions and steady efficient rain have continued
to cause high water issues from Allegheny County and southward. The
mode by which high water is being reported seems to have changed in
the last few hours. We're seeing less flash flood reports and more
general high water issues from hours of persistent rainfall. Thus,
we have transitioned most flash flood warnings to areal flood
warnings and will cancel the duration of the Flash Flood Watch.
Despite the cancellation of the Watch, flooding is expected to
continue for many locations through today.

General downward trend in rain rates and coverage will continue
through the day as the slow moving upper low pinwheels to our
southeast. Guidance has been consistent showing all rain ending
areawide by about late this afternoon/evening. This seems prudent,
given the eastward pull of the coastal low, and building heights
through our region. This will begin a period of much needed dry
weather that will continue through the short term.

&&

.SHORT TERM /8 PM THIS EVENING THROUGH MONDAY/...
Great Lakes surface high will advance eastward over the weekend,
resulting in much drier conditions. Clouds will erode quickly
overnight, leaving clear and calm conditions. This could lead to
the generation of fog, especially in warmer river valleys.

Sunday will be warm and dry with high pressure fully dominating.
Fair conditions will spill into early next week, although
northwest flow aloft may help support additional cloud cover.

Temperatures through the latter part of the weekend will be near
average.

&&

.LONG TERM /MONDAY NIGHT THROUGH FRIDAY/...
High pressure will keep conditions dry through Tuesday with the
next chance for precipitation coming with the approach of a
front late Wednesday/Thursday. Some timing differences were
noted among deterministic guidance, so the Superblend was used
heavily for the latter half of next week. Near seasonal
temperatures are forecast.

&&

.AVIATION /12Z SATURDAY THROUGH WEDNESDAY/...
Conditions will slowly rise back to VFR in the early afternoon.
By early afternoon all locations should be back to VFR
conditions and will continue into the evening hours.

.OUTLOOK...
No widespread restrictions expected.

&&

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

&&

Hazardous Weather Outlook
National Weather Service Pittsburgh PA
755 AM EDT Sat Jul 29 2017

OHZ039>041-048>050-057>059-068-069-PAZ007>009-013>016-020-022-
WVZ001>004-301200-
Tuscarawas-Carroll-Columbiana-Coshocton-Harrison-Jefferson-Muskingum-
Guernsey-Belmont-Noble-Monroe-Mercer-Venango-Forest-Lawrence-Butler-
Clarion-Beaver-Armstrong-Hancock-Brooke-Ohio-Marshall-
755 AM EDT Sat Jul 29 2017

This Hazardous Weather Outlook is for east central Ohio, northwest
Pennsylvania, west central Pennsylvania, western Pennsylvania,
northern West Virginia and northern panhandle of West Virginia.

.DAY ONE...Today and Tonight.

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

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

MDZ001-PAZ021-023-029-031-073>076-WVZ012-021-509>514-301200-
Garrett-Allegheny-Indiana-Washington-Greene-Westmoreland-
Westmoreland Ridges-Fayette-Fayette Ridges-Wetzel-Marion-Monongalia-
Ridges of Eastern Monongalia and Northwestern Preston-Preston-
Eastern Preston-Western Tucker-Eastern Tucker-
755 AM EDT Sat Jul 29 2017

This Hazardous Weather Outlook is for western Maryland, southwest
Pennsylvania, west central Pennsylvania and northern West Virginia.

.DAY ONE...Today and Tonight.

Persistent rainfall this morning will continue to cause flooding in
areas that received several inches of rain overnight. Additional
flood warnings may be necessary today.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

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

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PITTSBURGH PA
917 AM EDT SAT JUL 29 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0914 AM     FLOOD            HENDRICKS               39.08N  79.63W
07/29/2017                   TUCKER             WV   PUBLIC

            WATER CONDITIONS ON THE BLACKWATER RIVER IS HIGH AND
            OUT OF ITS BANKS AT MANY LOCATIONS.

&&

EVENT NUMBER PBZ1701949

JD

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PITTSBURGH PA
927 AM EDT SAT JUL 29 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0925 AM     FLOOD            OAKLAND                 39.41N  79.41W
07/29/2017                   GARRETT            MD   EMERGENCY MNGR

            NUMEROUS ROADS HAVE BEEN CLOSED DUE TO FLOODING IN AND
            AROUND OAKLAND

&&

EVENT NUMBER PBZ1701950

JD

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PITTSBURGH PA
1028 AM EDT SAT JUL 29 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1023 AM     FLOOD            MANNINGTON              39.53N  80.34W
07/29/2017                   MARION             WV   EMERGENCY MNGR

            FLOODING IS ON GOING IN THE TOWN OF MANNINGTON WITH
            NUMEROUS STREETS CLOSED

&&

EVENT NUMBER PBZ1701951

JD

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PITTSBURGH PA
1030 AM EDT SAT JUL 29 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1029 AM     HEAVY RAIN       LOWER BURRELL           40.58N  79.71W
07/29/2017  M3.75 INCH       WESTMORELAND       PA   TRAINED SPOTTER

            STORM TOTAL

&&

EVENT NUMBER PBZ1701952

AMILLER

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PITTSBURGH PA
1048 AM EDT SAT JUL 29 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1047 AM     HEAVY RAIN       VENETIA                 40.25N  80.04W
07/29/2017  M4.83 INCH       WASHINGTON         PA   TRAINED SPOTTER

            IN 24 HOURS

&&

EVENT NUMBER PBZ1701953

AMILLER

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PITTSBURGH PA
1110 AM EDT SAT JUL 29 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0900 AM     FLOOD            HARMAR HEIGHTS          40.56N  79.82W
07/29/2017                   ALLEGHENY          PA   EMERGENCY MNGR

            200 BLOCK OF HERRON AVE FLOODING FROM LOCALIZED RUNOFF

&&

EVENT NUMBER PBZ1701954

JD