Portions of Fayette and Westmoreland counties in Pennsylvania were added to the Severe Drought (D2) areas of the Drought Monitor on July 23rd. Conditions have gradually deteriorated through the region, with Severe Drought continuing into September.
Every event with a place to put it; 3 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS PBZ wrote it up.
Portions of Fayette and Westmoreland counties in Pennsylvania were added to the Severe Drought (D2) areas of the Drought Monitor on July 23rd. Conditions have gradually deteriorated through the region, with Severe Drought continuing into September.
The local office's own words before the first event, 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 the first event at Jul 23, 6:44 AM EST, 16 minutes earlier.
Area Forecast Discussion National Weather Service Pittsburgh PA 744 AM EDT Tue Jul 23 2024 .SYNOPSIS... Seasonable temperature in an unsettled pattern will continue until a Thursday cold front moves through. A warm-up is expected into the weekend with dry weather returning. && .NEAR TERM /THROUGH TONIGHT/... KEY MESSAGES: - Patchy fog but otherwise dry in the morning. - Isolated to widely scattered showers and thunderstorms possible in the late afternoon and evening; best chances across northern West Virginia. ______________________________________________________________ Patchy fog has developed across much of the area early this morning, with the greatest coverage and most dense fog occurring in areas that saw appreciable rainfall during the day Monday. This fog should dissipate by mid to late morning, with the first half of today remaining otherwise dry. Upper troughing remains in place over the central CONUS to kick off the forecast, with the trough axis oriented roughly northeast-southwest from the Great Lakes into northern Texas. This feature remains generally unchanged over the next 24 hours, save for a series of weak embedded shortwaves that ripple their way through the flow. Just downstream from this trough, the local area remains firmly entrenched under a deep layer west- southwest flow, maintaining status quo with regard to the existing above-normal regional moisture and temperature trends. Two distinct features will drive rain chances today, both of which are weak shortwaves but coming in from different sources areas. One wave lifts quickly from AL/MS northeastward through WV and the mid-Atlantic coast. The other wave simultaneously rotates from the upper Midwest eastward across the Great Lakes to our north. The result is enhanced forcing to the south of the local area (central WV) and to the north of the local area (closer to Lake Erie). These will be the areas with the greatest chance of seeing showers and thunderstorms this afternoon and evening, while the rest of us stuck between them (including most of southwest PA, eastern OH, and the northern WV panhandle) will see weaker forcing and thus a lesser coverage and lower chances. Rain chances generally taper everywhere overnight, with the exception being areas southeast of Pittsburgh over northeast WV where a weak 500mb jet continues to support scattered convection into Wednesday morning. && .SHORT TERM /WEDNESDAY THROUGH WEDNESDAY NIGHT/... KEY MESSAGES: - Precipitation chances continue ahead of an approaching upper trough and attendant cold front. - Temperatures and moisture continue to trend above normal. _________________________________________________________________ The larger upper trough system that had remained in place over the central CONUS (mentioned above in the Near Term discussion) finally begins to advance eastward Wednesday and will be centered more over southern Ontario and the Ohio Valley by Thursday morning. Weak surface cyclogenesis occurs in southern Ontario and the resulting surface low lifts northeast across eastern Canada into Wednesday night, with a trailing cold front advancing southeastward across the Great Lakes. A weak pre- frontal trough that advances into the local area ahead of the approaching front could serve as a focus for scattered thunderstorm activity late Wednesday afternoon and evening. Marginal instability (HREF suggests SBCAPE ranging from roughly 500-1000 J/kg) and better organized flow aloft with the approaching trough could lead to a low-end threat for damaging winds, particularly if storms can organize into line segments as some of the CAMs might suggest. The Storm Prediction Center has areas northwest of Pittsburgh highlighted in a Marginal Risk (Level 1 out of 5) for this threat, in general agreement with machine learning damaging wind probabilities. Rain chances continue through Wednesday night in a moisture-rich environment under unsettled flow, though thunderstorm chances (and the associated severe threat) would diminish after dark with the loss of daytime heating and surface-based instability. && .LONG TERM /THURSDAY THROUGH MONDAY/... KEY MESSAGES: - A cold front will pass Thursday and provide the highest chance of rain this week. - Dry, warm weather is forecast for the weekend. ________________________________________________________________ The surface cold front mentioned above in the Short Term discussion is expected to pass through the local area during the daytime hours on Thursday. The front will serve as the best source of lift we will see this week and therefore brings with it the highest rain chances of the week. At this time, roughly half of ensembles continue to depict around 500 J/kg to 1000 J/kg SBCAPE and roughly 20kts of bulk shear, suggesting that storms that form along and ahead of the front may remain sub- severe, but worth monitoring. Temperatures on Thursday remain near-average, but are followed by seasonably cool temperatures Thursday night with fog potentially returning in areas that see skies clear out and that saw rain during the afternoon/evening. Ensemble clusters are in good agreement on a building ridge into the weekend and early next week that would signal high confidence in a return to a drier pattern with seasonably warm temperatures. && .AVIATION /12Z TUESDAY THROUGH SATURDAY/... Dense fog and low stratus are in place across much of southwest PA and northern WV, with patchier, more valley-based coverage in southeast Ohio. Expect IFR/LIFR conditions to continue initially before improvement in the 13Z-14Z timeframe due to increased heating/mixing, although some cirrus southeast of PIT may briefly delay a return to VFR at MGW. Scattered to broken cumulus development will follow the dissipation of fog later this morning, with areawide VFR conditions forecast by 16Z, along with a light southwest wind. Scattered showers and a few thunderstorms are expected to develop this afternoon in modest instability. For now, maintained VCSH mention at locations with the higher threat, mainly the I-80 terminals (FKL/DUJ) and MGW, closer to the ridges. Most precipitation should cease by late evening, with a broken deck of mid and high clouds persisting through the night. .Outlook... Scattered showers and thunderstorms and restrictions, especially during the afternoon and evening hours, are expected through Wednesday, as shortwaves embedded in southwest flow cross the region. Showers and thunderstorms are likely on Thursday with the passage of a cold front. VFR returns Friday under high pressure. && .PBZ WATCHES/WARNINGS/ADVISORIES... PA...None. OH...None. WV...None. && SYNOPSIS...Cermak/Milcarek NEAR TERM...Cermak SHORT TERM...Cermak LONG TERM...Cermak/Milcarek AVIATION...MLB/CL
Hazardous Weather Outlook National Weather Service Pittsburgh PA 338 AM EDT Tue Jul 23 2024 OHZ039>041-048>050-057>059-068-069-PAZ007>009-013>016-020>022-029- 031-073>078-WVZ001>004-012-021-509>514-240745- Tuscarawas-Carroll-Columbiana-Coshocton-Harrison-Jefferson OH- Muskingum-Guernsey-Belmont-Noble-Monroe-Mercer-Venango-Forest- Lawrence-Butler-Clarion-Jefferson PA-Beaver-Allegheny-Armstrong- Washington-Greene-Westmoreland-Higher Elevations of Westmoreland- Fayette-Higher Elevations of Fayette-Indiana- Higher Elevations of Indiana-Hancock-Brooke-Ohio-Marshall-Wetzel- Marion-Monongalia- Ridges of Eastern Monongalia and Northwestern Preston-Preston- Eastern Preston-Western Tucker-Eastern Tucker- 338 AM EDT Tue Jul 23 2024 This Hazardous Weather Outlook is for east central Ohio, western Pennsylvania, and northern West Virginia. .DAY ONE...Today and tonight. No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. TC
Special Weather Statement National Weather Service Pittsburgh PA 429 AM EDT Tue Jul 23 2024 OHZ039>041-048>050-057>059-068-069-PAZ007>009-013>016-020>022-029- 031-073>078-WVZ001>004-012-021-509>514-231300- Tuscarawas-Carroll-Columbiana-Coshocton-Harrison-Jefferson OH- Muskingum-Guernsey-Belmont-Noble-Monroe-Mercer-Venango-Forest- Lawrence-Butler-Clarion-Jefferson PA-Beaver-Allegheny-Armstrong- Washington-Greene-Westmoreland-Higher Elevations of Westmoreland- Fayette-Higher Elevations of Fayette-Indiana- Higher Elevations of Indiana-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 New Philadelphia, Dover, Carrollton, Malvern, East Liverpool, Salem, Columbiana, Coshocton, Cadiz, Steubenville, Zanesville, Cambridge, Martins Ferry, St. Clairsville, Caldwell, Woodsfield, Sharon, Hermitage, Grove City, Oil City, Franklin, Tionesta, New Castle, Ellwood City, Butler, Clarion, Punxsutawney, Brookville, Aliquippa, Beaver Falls, Ambridge, Monaca, Pittsburgh Metro Area, Kittanning, Ford City, Washington, Canonsburg, Waynesburg, Murrysville, Greensburg, New Kensington, Lower Burrell, Latrobe, Monessen, Ligonier, Donegal, Uniontown, Champion, Ohiopyle, Indiana, Armagh, Weirton, 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 429 AM EDT Tue Jul 23 2024 ...PATCHY DENSE FOG THIS MORNING... Patchy dense fog is ongoing early this morning, with the highest concentration occurring in and around river valleys as well as areas that received heavier rainfall on Monday. Expect rapid changes in visibility over short distances, potentially down to a quarter mile or less at times. Remain alert and use extra caution if traveling. Remember to slow down, increase the distance between you and the vehicle ahead of you, and use low beam headlights. Fog should begin to dissipate by or shortly after 9AM EDT. TC
The national radar mosaic for the moment the first event began.
3 drought. Local standard time, as filed.
Severe Drought conditions started July 23rd and continued in the end of September.
Severe Drought conditions started July 23rd and continued in the end of September.
Severe Drought conditions started July 23rd and continued in the end of September.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Pennsylvania in 2024Every state in 2024This day in weather historyWarnings in Pennsylvania, July 2024
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 1206894, 1206895, 1206896.