Flash Flood Warning 17, NWS Pittsburgh, PA

000 
WGUS71 KPBZ 060608
FFSPBZ

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE PITTSBURGH PA
207 AM EDT MON AUG 6 2007

PAC003-060830-
/X.CON.KPBZ.FF.W.0017.000000T0000Z-070806T0830Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ALLEGHENY PA-
207 AM EDT MON AUG 6 2007

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 430 AM EDT FOR
ALLEGHENY COUNTY...

AT 206 AM EDT...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED 
THUNDERSTORMS PRODUCING FLASH FLOODING OVER THE WARNED AREA. SOME 
EVACUATIONS WERE REPORTED IN THE MILLVALE AREA DUE TO FLASH FLOODING 
ALONG GURTYS RUN.

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO WEXFORD...
SPRINGDALE...SEWICKLEY...RUSSELLTON...PLUM...PERRYSVILLE...PENN
HILLS...NATRONA HEIGHTS...MOON...GIBSONIA...FRANKLIN PARK AND FOX
CHAPEL

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. MOVE
UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS
SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. MOVE TO HIGHER GROUND.

LAT...LON 4062 8016 4068 8015 4065 7970 4057 7979
      4053 7970 4044 7970 4039 7977 4026 7979
      4020 7985 4021 7997 4026 7995 4033 8019
      4048 8036
TIME...MOT...LOC 0607Z 180DEG 0KT 4047 7981

$$

000 
WGUS71 KPBZ 060822
FFSPBZ

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE PITTSBURGH PA
420 AM EDT MON AUG 6 2007

PAC003-060830-
/X.EXP.KPBZ.FF.W.0017.000000T0000Z-070806T0830Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ALLEGHENY PA-
420 AM EDT MON AUG 6 2007

...THE FLASH FLOOD WARNING WILL EXPIRE AT 430 AM EDT FOR ALLEGHENY
COUNTY...

FLOOD WATERS WATER HAVE RECEDED ACROSS THE COUNTY. SHOWERS AND 
THUNDERSTORMS WITH HEAVY RAIN HAVE LEFT THE COUNTY WITH ONLY LIGHT 
RAIN SHOWERS EXPECTED EARLY THIS MORNING.

LAT...LON 4062 8016 4068 8015 4065 7970 4057 7979
      4053 7970 4044 7970 4039 7977 4026 7979
      4020 7985 4021 7997 4026 7995 4033 8019
      4048 8036
TIME...MOT...LOC 0820Z 180DEG 0KT 4047 7981

$$

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PITTSBURGH PA
741 PM EDT SUN AUG 5 2007

.SYNOPSIS...
A WARM FRONT ORIENTED WEST TO EAST WILL REMAIN NEAR THE UPPER OHIO
VALLEY FOR MUCH OF THIS WEEK. THIS FRONT WILL MAINTAIN VERY WARM AND
HUMID CONDITIONS ACROSS THE AREA ALONG WITH A THREAT OF SHOWERS AND
THUNDERSTORMS MOST DAYS.

&&

.NEAR TERM /UNTIL 6 AM MONDAY MORNING/...
SHOWERS HAVE WEAKENED AND BECOME LESS NUMEROUS ACROSS THE FORECAST
AREA. WILL KEEP A RISK OF SCATTERED SHOWERS AND A POSSBILE TSTM
OVERNIGHT...BUT THUNDER WILL BE PRETTY WIDELY SCATTERED. ADDITONAL
RAINFALL OVERNIGHT WILL BE GENERALLY LESS THAN O.25 INCHES.

THERE CAN BE PATCHY FOG DEVELOPMENT LATE TONIGHT CONSIDERING THE
WET GROUND FROM THE PREVIOUS RAINFALL.

&&

.SHORT TERM /6 AM MONDAY MORNING THROUGH TUESDAY/...
BASED ON RECENT SREF MODEL RUNS, EXPECT PATCHY FOG TO DISSIPATE
QUICKLY IN THE MORNING AND CHANCES OF SHOWERS AND THUNDERSTORMS TO
BE DECREASING ACROSS THE UPPER OHIO VALLEY MONDAY WITH LITTLE CHANCE
MONDAY NIGHT AND TUESDAY. EVEN THOUGH THE WARM FRONT WILL
STILL BE LINGERING JUST TO THE SOUTH OF INTERSTATE 70. EXPECT HIGH
TEMPERATURES TO REACH THE UPPER 80S MONDAY AND THEN AROUND 90
TUESDAY AS SUGGESTED BY GFS AND NAM MOS VALUES.

&&

.LONG TERM /TUESDAY NIGHT THROUGH SUNDAY/...
EXPECT CHANCES OF THUNDERSTORMS TO INCREASE TUESDAY NIGHT AS MOST
GFS ENSEMBLE MEMBERS SHOW A LOW PRESSURE CENTER MOVING EASTWARD
ALONG THE WARM FRONT THROUGH THE GREAT LAKES AND UPPER OHIO VALLEY.
AFTER THAT, GFS OPERATIONAL MODEL AND SEVERAL ENSEMBLE MEMBERS SHOW
THE NEXT REAL CHANCE OF SHOWERS AND THUNDERSTORMS WILL BE
THURSDAY INTO FRIDAY AS ANOTHER LOW PRESSURE CENTER PASSES ALONG THE
WARM FRONT AND HUMID AIR MASS STILL HOVERING NEAR THE UPPER OHIO
VALLEY.

FORECASTED TEMPERATURES WILL BE WARMER THAN NORMAL AS SUPPORTED BY
H8 TEMPERATURES NEAR 20C AND HPC AND GFS MOS GUIDANCE.

&&

.AVIATION /00Z MONDAY THROUGH FRIDAY/...
RADAR AND SURFACE DATA SHOW SCATTERED SHOWERS AND ISOLATED
THUNDERSTORMS WILL MOVE THROUGH THE UPPER OHIO VALLEY
OVERNIGHT AND BRING MVFR CONDITIONS AND PERIODIC IFR. MVFR AND
ISOLATED IFR CONDITIONS CAN BE EXPTECTED TOWARD DAYBREAK AS FOG FURTHER
REDUCES VISIBILITIES.

EXPECT VFR CONDITIONS TO BECOME PREVALENT MONDAY AS FOG DISSIPATES
AND SHOWER CHANCES DIMINISH.

DUE TO HIGH HUMIDITY THERE CAN BE SOME FLIGHT RESTRICTIONS TO MVFR
AND ISOLATED IFR SEVERAL LATE NIGHTS THIS WEEK IN FOG AND HAZE. ALSO
FOR THE EXTENDED PORTION UNSETTLED WEATHER CONDITIONS WILL BE THE
RULE. THUNDERSTORMS TUESDAY NIGHT AND LATE WEEK CAN BRING SCATTERED
IFR CONDITIONS.

&&

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

&&

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE PITTSBURGH PA
511 AM EDT SUN AUG 5 2007

MDZ001-OHZ039>041-048>050-057>059-068-069-PAZ007>009-013>016-020>023-
029>032-WVZ001>004-012-021>023-041-060915-
GARRETT-TUSCARAWAS-CARROLL-COLUMBIANA-COSHOCTON-HARRISON-
JEFFERSON OH-MUSKINGUM-GUERNSEY-BELMONT-NOBLE-MONROE-MERCER-VENANGO-
FOREST-LAWRENCE-BUTLER-CLARION-JEFFERSON PA-BEAVER-ALLEGHENY-
ARMSTRONG-INDIANA-WASHINGTON-WESTMORELAND-GREENE-FAYETTE-HANCOCK-
BROOKE-OHIO-MARSHALL-WETZEL-MARION-MONONGALIA-PRESTON-TUCKER-
511 AM EDT SUN AUG 5 2007

THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN MARYLAND...EAST
CENTRAL OHIO...NORTHWEST PENNSYLVANIA...SOUTHWEST
PENNSYLVANIA...WEST CENTRAL 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...MONDAY THROUGH SATURDAY

VERY WARM AND HUMID CONDITIONS MONDAY WILL ALLOW SCATTERED
THUNDERSTORMS TO FORM NEAR A WARM FRONT. A FEW OF THESE STORMS
COULD BE SEVERE WITH DAMAGING WINDS AND POSSIBLE LARGE HAIL.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED MONDAY.