Alert archive / Ohio / Flash Flood Watches in 2021

Flash Flood Watch 5, NWS Pittsburgh, PA

August 30, 20218 counties in Pennsylvania; 9 counties in West Virginia; 11 counties in Ohio

NWS Pittsburgh, PA issued this flash flood watch at Aug 30, 2021, 4:33 AM EDT for 8 counties in Pennsylvania; 9 counties in West Virginia; 11 counties in Ohio. It took effect at Sep 1, 2021, 2:00 AM EDT. It was in force for 11 hr.

The area

The counties it named.

The facts

Issued
Aug 30, 2021, 4:33 AM EDT (08:33 UTC)
In effect from
Sep 1, 2021, 2:00 AM EDT
Expired
Sep 1, 2021, 1:24 PM EDT
In force
11 hr
Issued by
NWS Pittsburgh, PA
Flood severity
None
All 28 counties

Belmont County, OH, Carroll County, OH, Columbiana County, OH, Coshocton County, OH, Guernsey County, OH, Harrison County, OH, Jefferson County, OH, Monroe County, OH, Muskingum County, OH, Noble County, OH, Tuscarawas County, OH, Allegheny County, PA, Armstrong County, PA, Beaver County, PA, Butler County, PA, Fayette County, PA, Greene County, PA, Washington County, PA, Westmoreland County, PA, Brooke County, WV, Hancock County, WV, Marion County, WV, Marshall County, WV, Monongalia County, WV, Ohio County, WV, Preston County, WV, Tucker County, WV, Wetzel County, WV

The radar

The Pittsburgh radar (KPBZ), 54 km from the middle of the area, began a volume at 08:33 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Pittsburgh, PA (KPIT), launched 00:00Z, 8.6 hours before the alert went out and 51 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Pittsburgh, PA at 00:00Z on 2021-08-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 472 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Pittsburgh, PA at 00:00Z on 2021-08-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 70 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
472 J/kg
Mixed-layer CIN
-118 J/kg
Mixed-layer LCL
1249 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
70 m²/s²
0-3 km storm-relative helicity
115 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.8

Open this sounding in Storm Lab

The text

As transmitted.

227 
WGUS61 KPBZ 300833
FFAPBZ

URGENT - IMMEDIATE BROADCAST REQUESTED
Flood Watch
National Weather Service Pittsburgh PA
433 AM EDT Mon Aug 30 2021

OHZ059-068-069-PAZ021>023-029-031-073>076-WVZ002>004-012-021-509>514-
301645-
/O.NEW.KPBZ.FF.A.0005.210901T0600Z-210902T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Belmont-Noble-Monroe-Allegheny-Armstrong-Indiana-Washington-
Greene-Westmoreland-Higher Elevations of Westmoreland-Fayette-
Higher Elevations of Fayette-Brooke-Ohio-Marshall-Wetzel-Marion-
Monongalia-Ridges of Eastern Monongalia and Northwestern Preston-
Preston-Eastern Preston-Western Tucker-Eastern Tucker-
Including the cities of Canonsburg, Thomas, New Kensington,
Caldwell, Pittsburgh Metro Area, New Martinsville, Greensburg,
Ligonier, Hazelton, Hendricks, Indiana, Rowlesburg, Terra Alta,
Champion, Coopers Rock, Murrysville, St. Clairsville, Kittanning,
Uniontown, Moundsville, Ford City, Morgantown, Kingwood, Parsons,
Woodsfield, Latrobe, Monessen, Canaan Valley, Davis, Wheeling,
Wellsburg, Lower Burrell, Saint George, Donegal, Washington,
Waynesburg, Fairmont, Martins Ferry, Bruceton Mills, Ohiopyle,
and Follansbee
433 AM EDT Mon Aug 30 2021

...FLASH FLOOD WATCH IN EFFECT FROM LATE TUESDAY NIGHT THROUGH LATE 
WEDNESDAY NIGHT...

The National Weather Service in Pittsburgh has issued a

* Flash Flood Watch for Portions of east central Ohio, including the 
  following areas, Belmont, Monroe and Noble. Portions of 
  Pennsylvania, including the following areas, Allegheny, Armstrong, 
  Fayette, Greene, Higher Elevations of Fayette, Higher Elevations 
  of Westmoreland, Indiana, Washington and Westmoreland. Portions of 
  West Virginia, including the following areas, Brooke, Eastern 
  Preston, Eastern Tucker, Marion, Marshall, Monongalia, Ohio, 
  Preston, Ridges of Eastern Monongalia and Northwestern Preston, 
  Western Tucker and Wetzel.

* From late Tuesday night through late Wednesday night.

* Heavy rainfall associated with the remnants of Hurricane Ida will 
  result in an increased risk of flash flooding. Rainfall totals of 
  2 to 4 inches are expected, with locally higher amounts of around 
  6 inches possible.

* In addition to flash flooding, considerable river flooding is also 
  possible. The greatest risk will occur along small streams in 
  southwest Pennsylvania and northern West Virginia in the higher 
  terrain of the Allegheny Mountains.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

You should monitor later forecasts and be prepared to take action 
should Flash Flood Warnings be issued.

&&

$$

Brown
10 follow-up statements
299 
WGUS61 KPBZ 301515
FFAPBZ

Flood Watch
National Weather Service Pittsburgh PA
1115 AM EDT Mon Aug 30 2021



OHZ059-068-069-PAZ021>023-029-031-073>076-WVZ002>004-012-021-
509>514-310000-
/O.CON.KPBZ.FF.A.0005.210901T0600Z-210902T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Belmont-Noble-Monroe-Allegheny-Armstrong-Indiana-Washington-
Greene-Westmoreland-Higher Elevations of Westmoreland-Fayette-
Higher Elevations of Fayette-Brooke-Ohio-Marshall-Wetzel-Marion-
Monongalia-Ridges of Eastern Monongalia and Northwestern Preston-
Preston-Eastern Preston-Western Tucker-Eastern Tucker-
Including the cities of Martins Ferry, St. Clairsville, Caldwell,
Woodsfield, Pittsburgh Metro Area, Kittanning, Ford City, 
Indiana, Washington, Canonsburg, Waynesburg, Murrysville, 
Greensburg, New Kensington, Lower Burrell, Latrobe, Monessen, 
Ligonier, Donegal, Uniontown, Champion, Ohiopyle, Follansbee, 
Wellsburg, Wheeling, Moundsville, New Martinsville, Fairmont, 
Morgantown, Coopers Rock, Kingwood, Bruceton Mills, Terra Alta, 
Rowlesburg, Hazelton, Parsons, Hendricks, Saint George, Davis, 
Thomas, and Canaan Valley
1115 AM EDT Mon Aug 30 2021

...FLASH FLOOD WATCH REMAINS IN EFFECT FROM LATE TUESDAY NIGHT
THROUGH LATE WEDNESDAY NIGHT...

The Flash Flood Watch continues for

* Portions of east central Ohio, Pennsylvania, and West Virginia.

* From late Tuesday night through late Wednesday night

* Heavy rainfall associated with the remnants of Hurricane Ida 
  will result in an increased risk of flash flooding. Rainfall 
  totals of 2 to 4 inches are expected, with locally higher 
  amounts of around 6 inches possible. 

* In addition to flash flooding, river flooding is also possible
  along the Monongahela and Youghiogheny, as well as flooding
  along small streams in southwest Pennsylvania and northern West
  Virginia in the higher terrain of the Allegheny Mountains. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.

&&

$$
221 
WGUS61 KPBZ 302337
FFAPBZ

Flood Watch
National Weather Service Pittsburgh PA
737 PM EDT Mon Aug 30 2021

OHZ059-068-069-PAZ021>023-029-031-073>076-WVZ002>004-012-021-509>514-
310745-
/O.CON.KPBZ.FF.A.0005.210901T0600Z-210902T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Belmont-Noble-Monroe-Allegheny-Armstrong-Indiana-Washington-
Greene-Westmoreland-Higher Elevations of Westmoreland-Fayette-
Higher Elevations of Fayette-Brooke-Ohio-Marshall-Wetzel-Marion-
Monongalia-Ridges of Eastern Monongalia and Northwestern Preston-
Preston-Eastern Preston-Western Tucker-Eastern Tucker-
Including the cities of Canonsburg, Thomas, New Kensington,
Caldwell, Pittsburgh Metro Area, New Martinsville, Greensburg,
Ligonier, Hazelton, Hendricks, Indiana, Rowlesburg, Terra Alta,
Champion, Coopers Rock, Murrysville, St. Clairsville, Kittanning,
Uniontown, Moundsville, Ford City, Morgantown, Kingwood, Parsons,
Woodsfield, Latrobe, Monessen, Canaan Valley, Davis, Wheeling,
Wellsburg, Lower Burrell, Saint George, Donegal, Washington,
Waynesburg, Fairmont, Martins Ferry, Bruceton Mills, Ohiopyle,
and Follansbee
737 PM EDT Mon Aug 30 2021

...FLASH FLOOD WATCH REMAINS IN EFFECT FROM LATE TUESDAY NIGHT 
THROUGH LATE WEDNESDAY NIGHT...

The Flash Flood Watch continues for

* Portions of east central Ohio, including the following areas, 
  Belmont, Monroe and Noble. Portions of Pennsylvania, including the 
  following areas, Allegheny, Armstrong, Fayette, Greene, Higher 
  Elevations of Fayette, Higher Elevations of Westmoreland, Indiana, 
  Washington and Westmoreland. Portions of West Virginia, including 
  the following areas, Brooke, Eastern Preston, Eastern Tucker, 
  Marion, Marshall, Monongalia, Ohio, Preston, Ridges of Eastern 
  Monongalia and Northwestern Preston, Western Tucker and Wetzel.

* From late Tuesday night through late Wednesday night.

* Remnants of Ida will bring 1-3 inches of rain, potentially more in 
  some areas southeast of Pittsburgh, which may result in flash 
  flooding.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

You should monitor later forecasts and be prepared to take action 
should Flash Flood Warnings be issued.

&&

$$

JL
994 
WGUS61 KPBZ 310735
FFAPBZ

Flood Watch
National Weather Service Pittsburgh PA
335 AM EDT Tue Aug 31 2021

OHZ059-068-069-PAZ021>023-029-031-073>076-WVZ002>004-012-021-509>514-
311545-
/O.CON.KPBZ.FF.A.0005.210901T0600Z-210902T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Belmont-Noble-Monroe-Allegheny-Armstrong-Indiana-Washington-
Greene-Westmoreland-Higher Elevations of Westmoreland-Fayette-
Higher Elevations of Fayette-Brooke-Ohio-Marshall-Wetzel-Marion-
Monongalia-Ridges of Eastern Monongalia and Northwestern Preston-
Preston-Eastern Preston-Western Tucker-Eastern Tucker-
Including the cities of Canonsburg, Thomas, New Kensington,
Caldwell, Pittsburgh Metro Area, New Martinsville, Greensburg,
Ligonier, Hazelton, Hendricks, Indiana, Rowlesburg, Terra Alta,
Champion, Coopers Rock, Murrysville, St. Clairsville, Kittanning,
Uniontown, Moundsville, Ford City, Morgantown, Kingwood, Parsons,
Woodsfield, Latrobe, Monessen, Canaan Valley, Davis, Wheeling,
Wellsburg, Lower Burrell, Saint George, Donegal, Washington,
Waynesburg, Fairmont, Martins Ferry, Bruceton Mills, Ohiopyle,
and Follansbee
335 AM EDT Tue Aug 31 2021

...FLASH FLOOD WATCH REMAINS IN EFFECT FROM LATE TONIGHT THROUGH 
LATE WEDNESDAY NIGHT...

The Flash Flood Watch continues for

* Portions of east central Ohio, including the following areas, 
  Belmont, Monroe and Noble. Portions of Pennsylvania, including the 
  following areas, Allegheny, Armstrong, Fayette, Greene, Higher 
  Elevations of Fayette, Higher Elevations of Westmoreland, Indiana, 
  Washington and Westmoreland. Portions of West Virginia, including 
  the following areas, Brooke, Eastern Preston, Eastern Tucker, 
  Marion, Marshall, Monongalia, Ohio, Preston, Ridges of Eastern 
  Monongalia and Northwestern Preston, Western Tucker and Wetzel.

* From late tonight through late Wednesday night.

* Remnants of Ida will bring 1-4 inches of rain, potentially more in 
  some areas southeast of Pittsburgh, which may result in flash 
  flooding.

* In addition to flash flooding, considerable river flooding is also 
  possible. The greatest risk will occur along small streams in 
  southwest Pennsylvania and northern West Virginia in the higher 
  terrain of the Allegheny Mountains.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

You should monitor later forecasts and be prepared to take action 
should Flash Flood Warnings be issued.

&&

$$
847 
WGUS61 KPBZ 311543
FFAPBZ

Flood Watch
National Weather Service Pittsburgh PA
1143 AM EDT Tue Aug 31 2021

OHZ059-068-069-PAZ021>023-029-031-073>076-WVZ002>004-012-021-509>514-
312345-
/O.CON.KPBZ.FF.A.0005.210901T0600Z-210902T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Belmont-Noble-Monroe-Allegheny-Armstrong-Indiana-Washington-
Greene-Westmoreland-Higher Elevations of Westmoreland-Fayette-
Higher Elevations of Fayette-Brooke-Ohio-Marshall-Wetzel-Marion-
Monongalia-Ridges of Eastern Monongalia and Northwestern Preston-
Preston-Eastern Preston-Western Tucker-Eastern Tucker-
Including the cities of Canonsburg, Thomas, New Kensington,
Caldwell, Pittsburgh Metro Area, New Martinsville, Greensburg,
Ligonier, Hazelton, Hendricks, Indiana, Rowlesburg, Terra Alta,
Champion, Coopers Rock, Murrysville, St. Clairsville, Kittanning,
Uniontown, Moundsville, Ford City, Morgantown, Kingwood, Parsons,
Woodsfield, Latrobe, Monessen, Canaan Valley, Davis, Wheeling,
Wellsburg, Lower Burrell, Saint George, Donegal, Washington,
Waynesburg, Fairmont, Martins Ferry, Bruceton Mills, Ohiopyle,
and Follansbee
1143 AM EDT Tue Aug 31 2021

...FLASH FLOOD WATCH REMAINS IN EFFECT FROM LATE TONIGHT THROUGH 
LATE WEDNESDAY NIGHT...

The Flash Flood Watch continues for

* Portions of east central Ohio, including the following areas, 
  Belmont, Monroe and Noble. Portions of Pennsylvania, including the 
  following areas, Allegheny, Armstrong, Fayette, Greene, Higher 
  Elevations of Fayette, Higher Elevations of Westmoreland, Indiana, 
  Washington and Westmoreland. Portions of West Virginia, including 
  the following areas, Brooke, Eastern Preston, Eastern Tucker, 
  Marion, Marshall, Monongalia, Ohio, Preston, Ridges of Eastern 
  Monongalia and Northwestern Preston, Western Tucker and Wetzel.

* From late tonight through late Wednesday night.

* Excessive rainfall associated with the remnants of Hurricane Ida 
  will result in an increased risk of significant flash flood 
  impacts across the watch area. Rainfall totals of 2 to 6 inches 
  are likely, with localized higher amounts possible.

* In addition to flash flooding, considerable river flooding is also 
  possible. The greatest risk will occur along small streams in 
  southwest Pennsylvania and northern West Virginia in the higher 
  terrain of the Allegheny Mountains.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

You should monitor later forecasts and be prepared to take action 
should Flash Flood Warnings be issued.

&&

$$

Brown
758 
WGUS61 KPBZ 312154
FFAPBZ

URGENT - IMMEDIATE BROADCAST REQUESTED
Flood Watch
National Weather Service Pittsburgh PA
554 PM EDT Tue Aug 31 2021

OHZ039>041-048>050-057-058-PAZ014-020-WVZ001-010600-
/O.EXA.KPBZ.FF.A.0005.210901T0600Z-210902T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Tuscarawas-Carroll-Columbiana-Coshocton-Harrison-Jefferson OH-
Muskingum-Guernsey-Butler-Beaver-Hancock-
Including the cities of Coshocton, Cambridge, New Philadelphia,
Cadiz, Zanesville, Weirton, Steubenville, Salem, Carrollton,
Columbiana, Monaca, East Liverpool, Butler, Beaver Falls,
Malvern, Aliquippa, Ambridge, and Dover
554 PM EDT Tue Aug 31 2021

...FLASH FLOOD WATCH IN EFFECT FROM 2 AM EDT WEDNESDAY THROUGH LATE 
WEDNESDAY NIGHT...

The National Weather Service in Pittsburgh has expanded the

* Flash Flood Watch to include Portions of east central Ohio, 
  including the following areas, Carroll, Columbiana, Coshocton, 
  Guernsey, Harrison, Jefferson OH, Muskingum and Tuscarawas. 
  Portions of Pennsylvania, including the following areas, Beaver 
  and Butler. Portions of northern West Virginia, including the 
  following area, Hancock.

* From 2 AM EDT Wednesday through late Wednesday night.

* Excessive rain associated with the remnant of Hurricane Ida may  
  result in significant flash flood impacts across the watch area. 
  Rainfall totals of 2 to 6 inches are likely.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

You should monitor later forecasts and be prepared to take action 
should Flash Flood Warnings be issued.

&&

$$

OHZ059-068-069-PAZ021>023-029-031-073>076-WVZ002>004-012-021-509>514-
010600-
/O.CON.KPBZ.FF.A.0005.210901T0600Z-210902T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Belmont-Noble-Monroe-Allegheny-Armstrong-Indiana-Washington-
Greene-Westmoreland-Higher Elevations of Westmoreland-Fayette-
Higher Elevations of Fayette-Brooke-Ohio-Marshall-Wetzel-Marion-
Monongalia-Ridges of Eastern Monongalia and Northwestern Preston-
Preston-Eastern Preston-Western Tucker-Eastern Tucker-
Including the cities of Canonsburg, Thomas, New Kensington,
Caldwell, Pittsburgh Metro Area, New Martinsville, Greensburg,
Ligonier, Hazelton, Hendricks, Indiana, Rowlesburg, Terra Alta,
Champion, Coopers Rock, Murrysville, St. Clairsville, Kittanning,
Uniontown, Moundsville, Ford City, Morgantown, Kingwood, Parsons,
Woodsfield, Latrobe, Monessen, Canaan Valley, Davis, Wheeling,
Wellsburg, Lower Burrell, Saint George, Donegal, Washington,
Waynesburg, Fairmont, Martins Ferry, Bruceton Mills, Ohiopyle,
and Follansbee
554 PM EDT Tue Aug 31 2021

...FLASH FLOOD WATCH REMAINS IN EFFECT FROM 2 AM EDT WEDNESDAY 
THROUGH LATE WEDNESDAY NIGHT...

The Flash Flood Watch continues for

* Portions of east central Ohio, including the following areas, 
  Belmont, Monroe and Noble. Portions of Pennsylvania, including the 
  following areas, Allegheny, Armstrong, Fayette, Greene, Higher 
  Elevations of Fayette, Higher Elevations of Westmoreland, Indiana, 
  Washington and Westmoreland. Portions of West Virginia, including 
  the following areas, Brooke, Eastern Preston, Eastern Tucker, 
  Marion, Marshall, Monongalia, Ohio, Preston, Ridges of Eastern 
  Monongalia and Northwestern Preston, Western Tucker and Wetzel.

* From 2 AM EDT Wednesday through late Wednesday night.

* Excessive rainfall associated with the remnant of Hurricane Ida 
  may  result in a significant flash flood impacts across the watch 
  area. Rainfall totals of 2 to 6 inches are likely.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

You should monitor later forecasts and be prepared to take action 
should Flash Flood Warnings be issued.

&&

$$
282 
WGUS61 KPBZ 010524
FFAPBZ

Flood Watch
National Weather Service Pittsburgh PA
124 AM EDT Wed Sep 1 2021

OHZ039>041-048>050-057>059-068-069-PAZ014-020>023-029-031-073>076-
WVZ001>004-012-021-509>514-011330-
/O.CON.KPBZ.FF.A.0005.210901T0600Z-210902T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Tuscarawas-Carroll-Columbiana-Coshocton-Harrison-Jefferson OH-
Muskingum-Guernsey-Belmont-Noble-Monroe-Butler-Beaver-Allegheny-
Armstrong-Indiana-Washington-Greene-Westmoreland-Higher
Elevations of Westmoreland-Fayette-Higher Elevations of Fayette-
Hancock-Brooke-Ohio-Marshall-Wetzel-Marion-Monongalia-Ridges of
Eastern Monongalia and Northwestern Preston-Preston-Eastern
Preston-Western Tucker-Eastern Tucker-
Including the cities of Canonsburg, Thomas, New Kensington,
Caldwell, Pittsburgh Metro Area, New Martinsville, Greensburg,
Hendricks, Steubenville, Ligonier, Indiana, Butler, Beaver Falls,
Aliquippa, Coshocton, Terra Alta, Champion, New Philadelphia,
Coopers Rock, Hazelton, Murrysville, Weirton, St. Clairsville,
Rowlesburg, Bruceton Mills, Carrollton, Kittanning, Woodsfield,
Moundsville, Malvern, Ford City, Morgantown, Ambridge, Kingwood,
Cadiz, Parsons, Uniontown, Latrobe, Monessen, Columbiana, Canaan
Valley, East Liverpool, Davis, Monaca, Wheeling, Wellsburg,
Dover, Lower Burrell, Cambridge, Saint George, Donegal,
Zanesville, Washington, Waynesburg, Fairmont, Martins Ferry,
Salem, Ohiopyle, and Follansbee
124 AM EDT Wed Sep 1 2021

...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH LATE TONIGHT...

The Flash Flood Watch continues for

* Portions of east central Ohio, including the following areas, 
  Belmont, Carroll, Columbiana, Coshocton, Guernsey, Harrison, 
  Jefferson OH, Monroe, Muskingum, Noble and Tuscarawas. Portions of 
  Pennsylvania, including the following areas, Allegheny, Armstrong, 
  Beaver, Butler, Fayette, Greene, Higher Elevations of Fayette, 
  Higher Elevations of Westmoreland, Indiana, Washington and 
  Westmoreland. Portions of West Virginia, including the following 
  areas, Brooke, Eastern Preston, Eastern Tucker, Hancock, Marion, 
  Marshall, Monongalia, Ohio, Preston, Ridges of Eastern Monongalia 
  and Northwestern Preston, Western Tucker and Wetzel.

* Through late tonight.

* Excessive rainfall associated with the remnant of Hurricane Ida 
  may  result in a significant flash flood impacts across the watch 
  area. Rainfall totals of 1 to 5 inches are likely.


* In addition to flash flooding, considerable river flooding is also 
  possible. The greatest risk will occur along small streams in 
  southwest Pennsylvania and northern West Virginia in the higher 
  terrain of the Allegheny Mountains.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

You should monitor later forecasts and be prepared to take action 
should Flash Flood Warnings be issued.

&&

$$
497 
WGUS61 KPBZ 011303
FFAPBZ

Flood Watch
National Weather Service Pittsburgh PA
903 AM EDT Wed Sep 1 2021

OHZ039>041-048-057-058-011415-
/O.CAN.KPBZ.FF.A.0005.000000T0000Z-210902T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Tuscarawas-Carroll-Columbiana-Coshocton-Muskingum-Guernsey-
Including the cities of Coshocton, Cambridge, New Philadelphia,
Zanesville, Salem, Carrollton, Columbiana, East Liverpool,
Malvern, and Dover
903 AM EDT Wed Sep 1 2021

...FLASH FLOOD WATCH IS CANCELLED...

The Flash Flood Watch for A portion of east central Ohio, including 
the following areas, Carroll, Columbiana, Coshocton, Guernsey, 
Muskingum and Tuscarawas. has been cancelled.

The Flood Watch is cancelled.

$$

OHZ049-050-059-068-069-PAZ014-020>023-029-031-073>076-WVZ001>004-012-
021-509>514-012115-
/O.CON.KPBZ.FF.A.0005.000000T0000Z-210902T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Harrison-Jefferson OH-Belmont-Noble-Monroe-Butler-Beaver-
Allegheny-Armstrong-Indiana-Washington-Greene-Westmoreland-Higher
Elevations of Westmoreland-Fayette-Higher Elevations of Fayette-
Hancock-Brooke-Ohio-Marshall-Wetzel-Marion-Monongalia-Ridges of
Eastern Monongalia and Northwestern Preston-Preston-Eastern
Preston-Western Tucker-Eastern Tucker-
Including the cities of Canonsburg, Thomas, New Kensington,
Caldwell, Pittsburgh Metro Area, New Martinsville, Greensburg,
Hendricks, Steubenville, Ligonier, Beaver Falls, Butler, Indiana,
Aliquippa, Rowlesburg, Terra Alta, Champion, Coopers Rock,
Hazelton, Murrysville, Weirton, St. Clairsville, Kittanning,
Woodsfield, Moundsville, Ford City, Morgantown, Ambridge,
Kingwood, Cadiz, Parsons, Uniontown, Latrobe, Monessen, Canaan
Valley, Davis, Monaca, Wheeling, Wellsburg, Lower Burrell, Saint
George, Donegal, Washington, Waynesburg, Fairmont, Martins Ferry,
Bruceton Mills, Ohiopyle, and Follansbee
903 AM EDT Wed Sep 1 2021

...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH LATE TONIGHT...

The Flash Flood Watch continues for

* Portions of east central Ohio, including the following areas, 
  Belmont, Harrison, Jefferson OH, Monroe and Noble. Portions of 
  Pennsylvania, including the following areas, Allegheny, Armstrong, 
  Beaver, Butler, Fayette, Greene, Higher Elevations of Fayette, 
  Higher Elevations of Westmoreland, Indiana, Washington and 
  Westmoreland. Portions of West Virginia, including the following 
  areas, Brooke, Eastern Preston, Eastern Tucker, Hancock, Marion, 
  Marshall, Monongalia, Ohio, Preston, Ridges of Eastern Monongalia 
  and Northwestern Preston, Western Tucker and Wetzel.

* Through late tonight.

* Excessive rainfall associated with the remnant of Hurricane Ida 
  may  result in a significant flash flood impacts across the watch 
  area. Additional rainfall totals of 1 to 2 inches are likely.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

You should monitor later forecasts and be prepared to take action 
should Flash Flood Warnings be issued.

&&

$$
057 
WGUS61 KPBZ 011439
FFAPBZ

Flood Watch
National Weather Service Pittsburgh PA
1039 AM EDT Wed Sep 1 2021

OHZ049-050-059-068-069-PAZ014-020-WVZ001>004-012-011545-
/O.CAN.KPBZ.FF.A.0005.000000T0000Z-210902T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Harrison-Jefferson OH-Belmont-Noble-Monroe-Butler-Beaver-Hancock-
Brooke-Ohio-Marshall-Wetzel-
Including the cities of Ambridge, Moundsville, Cadiz, Caldwell,
Weirton, St. Clairsville, Martins Ferry, Steubenville, New
Martinsville, Monaca, Woodsfield, Beaver Falls, Butler, Wheeling,
Wellsburg, Aliquippa, and Follansbee
1039 AM EDT Wed Sep 1 2021

...FLASH FLOOD WATCH IS CANCELLED...

The Flash Flood Watch for Portions of east central Ohio, including 
the following areas, Belmont, Harrison, Jefferson OH, Monroe and 
Noble. Portions of Pennsylvania, including the following areas, 
Beaver and Butler. Portions of West Virginia, including the 
following areas, Brooke, Hancock, Marshall, Ohio and Wetzel. has 
been cancelled.

The Flood Watch is cancelled.

$$

PAZ021>023-029-031-073>076-WVZ021-509>514-012245-
/O.CON.KPBZ.FF.A.0005.000000T0000Z-210902T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Allegheny-Armstrong-Indiana-Washington-Greene-Westmoreland-Higher
Elevations of Westmoreland-Fayette-Higher Elevations of Fayette-
Marion-Monongalia-Ridges of Eastern Monongalia and Northwestern
Preston-Preston-Eastern Preston-Western Tucker-Eastern Tucker-
Including the cities of Canonsburg, Thomas, New Kensington,
Pittsburgh Metro Area, Greensburg, Ligonier, Hazelton, Hendricks,
Indiana, Rowlesburg, Terra Alta, Champion, Coopers Rock,
Murrysville, Kittanning, Uniontown, Ford City, Morgantown,
Kingwood, Parsons, Latrobe, Monessen, Canaan Valley, Davis, Lower
Burrell, Saint George, Donegal, Washington, Waynesburg, Fairmont,
Bruceton Mills, and Ohiopyle
1039 AM EDT Wed Sep 1 2021

...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH LATE TONIGHT...

The Flash Flood Watch continues for

* Portions of Pennsylvania, including the following areas, 
  Allegheny, Armstrong, Fayette, Greene, Higher Elevations of 
  Fayette, Higher Elevations of Westmoreland, Indiana, Washington 
  and Westmoreland. Portions of northern West Virginia, including 
  the following areas, Eastern Preston, Eastern Tucker, Marion, 
  Monongalia, Preston, Ridges of Eastern Monongalia and Northwestern 
  Preston and Western Tucker.

* Through late tonight.

* Excessive rainfall associated with the remnant of Hurricane Ida 
  may  still result in areas of flash flooding.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

You should monitor later forecasts and be prepared to take action 
should Flash Flood Warnings be issued.

&&

$$
547 
WGUS61 KPBZ 011603
FFAPBZ

Flood Watch
National Weather Service Pittsburgh PA
1203 PM EDT Wed Sep 1 2021

PAZ021-022-029-031-011715-
/O.CAN.KPBZ.FF.A.0005.000000T0000Z-210902T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Allegheny-Armstrong-Washington-Greene-
Including the cities of Canonsburg, Pittsburgh Metro Area,
Washington, Waynesburg, Kittanning, and Ford City
1203 PM EDT Wed Sep 1 2021

...FLASH FLOOD WATCH IS CANCELLED...

The Flash Flood Watch for Portions of southwest and western 
Pennsylvania, including the following areas, in southwest 
Pennsylvania, Greene and Washington. In western Pennsylvania, 
Allegheny and Armstrong. has been cancelled.

Heavy rainfall associated with the remnant of Ida is developing 
eastward.

$$

PAZ023-073>076-WVZ021-509>514-020015-
/O.CON.KPBZ.FF.A.0005.000000T0000Z-210902T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Indiana-Westmoreland-Higher Elevations of Westmoreland-Fayette-
Higher Elevations of Fayette-Marion-Monongalia-Ridges of Eastern
Monongalia and Northwestern Preston-Preston-Eastern Preston-
Western Tucker-Eastern Tucker-
Including the cities of Thomas, New Kensington, Greensburg,
Ligonier, Indiana, Hendricks, Hazelton, Fairmont, Terra Alta,
Champion, Coopers Rock, Murrysville, Uniontown, Morgantown,
Kingwood, Parsons, Latrobe, Monessen, Canaan Valley, Davis, Lower
Burrell, Saint George, Donegal, Rowlesburg, Bruceton Mills, and
Ohiopyle
1203 PM EDT Wed Sep 1 2021

...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH LATE TONIGHT...

The Flash Flood Watch continues for

* Portions of Pennsylvania, including the following areas, Fayette, 
  Higher Elevations of Fayette, Higher Elevations of Westmoreland, 
  Indiana and Westmoreland. Portions of northern West Virginia, 
  including the following areas, Eastern Preston, Eastern Tucker, 
  Marion, Monongalia, Preston, Ridges of Eastern Monongalia and 
  Northwestern Preston and Western Tucker.

* Through late tonight.

* Excessive rainfall associated with the remnant of Hurricane Ida 
  may  still result in areas of flash flooding.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

You should monitor later forecasts and be prepared to take action 
should Flash Flood Warnings be issued.

&&

$$
087 
WGUS61 KPBZ 011724
FFAPBZ

Flood Watch
National Weather Service Pittsburgh PA
124 PM EDT Wed Sep 1 2021

PAZ023-073>076-WVZ021-509>514-011830-
/O.CAN.KPBZ.FF.A.0005.000000T0000Z-210902T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Indiana-Westmoreland-Higher Elevations of Westmoreland-Fayette-
Higher Elevations of Fayette-Marion-Monongalia-Ridges of Eastern
Monongalia and Northwestern Preston-Preston-Eastern Preston-
Western Tucker-Eastern Tucker-
Including the cities of Thomas, New Kensington, Greensburg,
Ligonier, Indiana, Hendricks, Hazelton, Fairmont, Terra Alta,
Champion, Coopers Rock, Murrysville, Uniontown, Morgantown,
Kingwood, Parsons, Latrobe, Monessen, Canaan Valley, Davis, Lower
Burrell, Saint George, Donegal, Rowlesburg, Bruceton Mills, and
Ohiopyle
124 PM EDT Wed Sep 1 2021

...FLASH FLOOD WATCH IS CANCELLED...

The Flash Flood Watch for Portions of Pennsylvania, including the 
following areas, Fayette, Higher Elevations of Fayette, Higher 
Elevations of Westmoreland, Indiana and Westmoreland. Portions of 
northern West Virginia, including the following areas, Eastern 
Preston, Eastern Tucker, Marion, Monongalia, Preston, Ridges of 
Eastern Monongalia and Northwestern Preston and Western Tucker. has 
been cancelled.

The Flood Watch is cancelled. Areas of high water will gradually 
recede through the afternoon.  Please continue to heed remaining 
road closures.

$$

What forecasters said that day

The local office's own words before this flash flood watch went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Pittsburgh, PA wrote its last area forecast discussion before this flash flood watch went out at Aug 30, 2:07 AM EDT, 2 hours 26 minutes earlier.

Area forecast discussion, Aug 30, 2:07 AM EDT, 2 hours 26 minutes before
Area Forecast Discussion
National Weather Service Pittsburgh PA
207 AM EDT Mon Aug 30 2021

.SYNOPSIS...
Moisture on the van of the hurricane Ida remnant is expected to fuel
widespread and enhanced rainfall across the Upper Ohio Valley Region
on Tuesday night and Wednesday. In the meantime, warm and humid
weather continues with periodic scattered showers and storms.

&&

.NEAR TERM /THROUGH TONIGHT/...
Another warm and humid day is on deck for the Upper Ohio Valley and
Allegheny Mountains. Some shower activity may be ongoing around dawn
as overnight convection wanes, but may not diminish entirely given a
warm/moist airmass characterized by PWATs above the 90th percentile
and MLCAPE near 1000 J/kg. As a result, have kept low-end POPs
through the morning hours.

As the morning progresses, insolation will lead to another day with
temps in the 80s and dewpoints in the 70s. This heating will yield
MLCAPE increasing to around or possibly in excess of 2000 J/kg by
mid-afternoon. At the same time, a cold front dropping south from the
Great Lakes should advance to near the I-80 corridor. HREF members
focus convective activity farther south towards and south of I-70
today along a pre-frontal trough, likely the outflow boundary from
the overnight convection, coincident with the passage of a shortwave
trough. Given the orientation of the sfc trough to cloud-bearing wind
aloft, west-to-east training storms are definitely possible as the
system inches southward with system motion. Very high PWAT air / warm
cloud depths will lend itself to efficient rain processes, leading
to high rain rates. This could lead to instances of flash flooding
where convection segments train.

North of I-70, showers/storms should initiate near the cold front
boundary as well as it drops southward given the destabilized
airmass. However, HREF members and probs are indicating less coverage
with the sfc front during the day.

Previous Discussion concerning current overnight period...

1145 PM Update: Regional radars show a line of thunderstorms
extending along the Erie lakefront from the Buffalo area through
Cleveland and southwestward from there. Despite a nocturnally-cooled
sfc layer, mesoanalysis depicts MLCAPE upwards of 1000 J/kg between
the Pittsburgh Metro and the current placement of the line,
decreasing significantly east of I-79. The shortwave that helped
initiate and sustain the convection will dampen as it approaches the
Pittsburgh area that has/had been under the mid/upper- level ridge.
So current thinking is that the convective line will continue to
advance towards east-central Ohio, the northern WV Panhandle, and
western PA given modest instability and weak shear, but will lose
steam towards dawn as it advances close to the I-70 corridor and
Allegheny Mtns.

While severe weather is not expected, recent radar imagery of cells
ahead of the line have exhibited reasonably strong updrafts... thus
perhaps very small hail, brief heavy downpours, and some modestly
fast gusts may accompany the strongest of storms.

Otherwise, it'll be another warm night with temps struggling to drop
below 70. Any areas that manage to clear out for more than a couple
hours may see fog development in the typically-favored valley-type
locales.

&&

.SHORT TERM /TUESDAY THROUGH WEDNESDAY/...
By Tuesday morning, the aforementioned cold front will have
progressed to somewhere around the I-70 corridor. At this point, the
frontal boundary will become essentially stationary or at least very
slow-moving as we become sandwiched in a baroclinic zone between cool
northerlies from high pressure centered across Canada and warm,
tropical-like southerlies from the advancing remnants of tropical
disturbance Ida. 00z HRRR and NAM Nest both show scattered convection
initiating by the early-afternoon on Tuesday right along the sfc
front. The limiting factor to coverage and intensity of Tuesday's
storms will be the upper-level cloud cover from Ida. The less cloud
cover to begin the day, the greater we destabilizing and the
thunderstorm threat is in the afternoon... but if we remain clouded
in from the start, then thunderstorms will struggle with limited
CAPE. As far as temperature on Tuesday, look for a cooler day as
areas north of Pittsburgh will finally see some cold air advection...
while areas south of Pittsburgh will be underneath cloud cover
and/or rain.

Tuesday Night and Wednesday... here comes Ida.

The weakening tropical system Ida will begin to move northward
across the TN Valley Tuesday night and accelerate in response to a
northern stream trough digging southeastward from the Midwest. Rain
from the northern side of Ida will overspread northern West Virginia
and SW PA (and perhaps barely into SE Ohio close to the Ohio River)
overnight and continue through much of Wednesday as Ida moves
northeastward through Appalachia. This will pose a significant flood
threat to locations south and east of Pittsburgh and anyone in that
area needs to remain weather aware for the next few days.

How much rain and where exactly? That's the biggest question. Recent
model guidance has trended slightly farther SE, painting the axis of
heaviest rainfall somewhere between SW PA and the higher terrain of
WV, with Morgantown being near the center axis in several models.
Across the heaviest rainband, look for amounts between 3 and 6 inches
with localized higher amounts. Farther north, amounts should drop
off precipitously w/ areas north of Pittsburgh likely receiving less
than an inch. Where does this put the immediate Pittsburgh metro? In
an area of high uncertainty. Model guidance ranges from roughly just
1 inch upwards to about 5 inches for Allegheny County and
surrounding area, all dependent on the exact track of the system. We
should be able to hone in on these details by the evening suite of
model guidance.

Rain will come to an end by dusk or shortly thereafter on Wednesday
as the remnants of Ida depart eastward, with much cooler, drier air
filtering in behind the system.

&&

.LONG TERM /WEDNESDAY NIGHT THROUGH SUNDAY/...
Cooler and drier conditions are anticipated late week and into the
Labor Day Weekend with building high pressure.

&&

.AVIATION /06Z MONDAY THROUGH FRIDAY/...
A broken line of shra and tsra will continue to advance east to west as
a trough advances off the Great Lakes. Periods of MVFR to IFR within
convection are likely. Showers and storms should wrap up after 12Z.
However, restrictions may prevail under a warm, moist atmosphere into
the late morning; expected MVFR fog and MVFR to IFR stratus deck.

Convection is likely again later today along an encroaching frontal
boundary.

.Outlook...
Rain chances and widespread restrictions are likely late Tuesday
into Wednesday with the remnants of Ida.

VFR and dry weather is expected after the remnants exit Thursday.

&&

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

&&

In the hours before

Special weather statement, Aug 29, 11:27 PM EDT, 5 hours 6 minutes before
Special Weather Statement
National Weather Service Pittsburgh PA
1127 PM EDT Sun Aug 29 2021

OHZ057-058-300400-
Guernsey OH-Muskingum OH-
1127 PM EDT Sun Aug 29 2021

...A STRONG THUNDERSTORM WILL IMPACT WEST CENTRAL GUERNSEY AND
NORTHEASTERN MUSKINGUM COUNTIES THROUGH MIDNIGHT EDT...

At 1127 PM EDT, Doppler radar was tracking a strong thunderstorm 8
miles northwest of New Concord, or 11 miles northeast of Zanesville,
moving east at 20 mph.

HAZARD...Wind gusts up to 40 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations impacted include...
Otsego and Boden.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4002 8191 4013 8192 4015 8165 4001 8163
TIME...MOT...LOC 0327Z 269DEG 18KT 4008 8186

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH

The office that day

Everything else NWS Pittsburgh, PA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 30, 2:11 AM EDTAreal Flood WarningPBZIndiana, Jefferson117 min
Aug 30, 11:19 AM EDTRiver Flood WatchPBZFayette4 days
Aug 30, 11:19 AM EDTRiver Flood WatchPBZFayette, Greene3 days
Aug 30, 11:19 AM EDTRiver Flood WatchPBZAllegheny4 days
Aug 30, 11:19 AM EDTRiver Flood WatchPBZFayette, Washington, Westmoreland4 days
Aug 30, 11:19 AM EDTRiver Flood WatchPBZFayette, Greene3 days
Aug 30, 11:19 AM EDTRiver Flood WatchPBZWestmoreland3 days
Aug 30, 11:19 AM EDTRiver Flood WatchPBZAllegheny, Washington4 days
Aug 30, 11:23 AM EDTRiver Flood AdvisoryPBZAllegheny58 hr
Aug 29, 11:27 PM EDTSpecial Weather StatementPBZMuskingum33 min
Aug 30, 5:42 PM EDTSpecial Weather StatementPBZNoble33 min
Aug 30, 6:28 PM EDTAreal Flood AdvisoryPBZNoble2 hr

Nearby

Flash Flood Watches in Ohio, 2021Flash Flood Watches in West Virginia, 2021Flash Flood Watches in Pennsylvania, 2021Every flash flood watch in 2021

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.