Alert archive / Ohio / Flash Flood Watches in 2021
Flash Flood Watch 5, NWS Pittsburgh, PA
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.
- 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
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 MPHThe office that day
Everything else NWS Pittsburgh, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 30, 2:11 AM EDT | Areal Flood Warning | PBZ | Indiana, Jefferson | 117 min |
| Aug 30, 11:19 AM EDT | River Flood Watch | PBZ | Fayette | 4 days |
| Aug 30, 11:19 AM EDT | River Flood Watch | PBZ | Fayette, Greene | 3 days |
| Aug 30, 11:19 AM EDT | River Flood Watch | PBZ | Allegheny | 4 days |
| Aug 30, 11:19 AM EDT | River Flood Watch | PBZ | Fayette, Washington, Westmoreland | 4 days |
| Aug 30, 11:19 AM EDT | River Flood Watch | PBZ | Fayette, Greene | 3 days |
| Aug 30, 11:19 AM EDT | River Flood Watch | PBZ | Westmoreland | 3 days |
| Aug 30, 11:19 AM EDT | River Flood Watch | PBZ | Allegheny, Washington | 4 days |
| Aug 30, 11:23 AM EDT | River Flood Advisory | PBZ | Allegheny | 58 hr |
| Aug 29, 11:27 PM EDT | Special Weather Statement | PBZ | Muskingum | 33 min |
| Aug 30, 5:42 PM EDT | Special Weather Statement | PBZ | Noble | 33 min |
| Aug 30, 6:28 PM EDT | Areal Flood Advisory | PBZ | Noble | 2 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.