Training showers created isolated flooding in portions of the region early Monday morning (April 1st). Convection originated in the Midwest along a stationary boundary.
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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.
Training showers created isolated flooding in portions of the region early Monday morning (April 1st). Convection originated in the Midwest along a stationary boundary. With zonal flow over Illinois, Indiana, and Ohio, due to an elongated trough over the West Coast, convection trained from west to east. CoCoRaHS observers measured 1.50 to 2 inches of rain along I-70.
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 Apr 1, 5:29 AM EST, 2 hours 21 minutes earlier.
Area Forecast Discussion National Weather Service Pittsburgh PA 629 AM EDT Mon Apr 1 2024 .SYNOPSIS... Several rounds of showers and thunderstorms are expected through Wednesday, followed by continued unsettled conditions and cooler temperatures through the end of the week. && .NEAR TERM /UNTIL 6 PM THIS EVENING/... KEY MESSAGES: - Widespread showers this morning followed by a mainly dry afternoon. --------------------------------------------------------------- Warm advection and lift ahead of a wave of low pressure passing south of the region along a quasi- stationary frontal boundary will result in widespread rain this morning. Rates have largely remained relatively low for much of the region with totals so far around 050" or less. The exception being areas in the vicinity of the mentioned boundary where more robust convection and with embedded storms where localized areas in excess of 1.5" were observed over several hours. (Note: radar has been severely underestimating amounts in these areas) While there may be localized minor flooding as a result in locations prone to flooding, these amounts should be largely non-problematic with additional precipitation this morning remaining on the light side. Any additional periods of more moderate rain will need to be monitored given current 3hr and 6hr FFG values sitting around 1.75" and 2.25" respectively. Shortwave ridging will bring an end to precipitation during the afternoon, with daytime highs in the low to mid 60s. && .SHORT TERM /6 PM THIS EVENING THROUGH TUESDAY NIGHT/... KEY MESSAGES: - Showers and thunderstorms return tonight, with increasing flood potential mainly south of PGH through the period. - Marginal risk for severe storms Tuesday. ----------------------------------------------------------------- Another disturbance will move along the quasi- stationary boundary tonight, bringing another round of widespread rainfall with higher flooding rain potential given the previous rainfall. By this time, portions of the local area may have already seen upwards of 1.0-1.5 inches of rainfall, meaning soils could be saturated with more runoff potential and a heightened risk for areal flooding. As far as severe potential for tonight, SPC has maintained the sliver of marginal risk across southern portions of the CWA for Day 1. Instability is marginal at best, but there could be just enough support for a low-end damaging wind and hail threat. Most of the efficient rainfall and stronger convection should wane or drop off to the southeast Tuesday morning. Surface heating should result in increasing instability through the day Tuesday. Strong shear is also progged through peak heating, as the surface low's associated cold front approaches. While SPC has trimmed the slight risk back to south of the forecast area for Tuesday, there remains a marginal risk for severe storms during the afternoon and evening across at least the southern half of the region, with greater focus along and south of I-70. Model ensembles indicate warm front should continue lifting north across the region Tuesday evening, as a surface low tracks toward the Lower Great Lakes and Upper Ohio Valley region. Ongoing locally heavy rain is possible, continuing the flood potential. && .LONG TERM /WEDNESDAY THROUGH SUNDAY/... KEY MESSAGES: - Colder and windy for the second half of the week with rain and snow showers. ------------------------------------------------------------------- The front should cross the area by early Wednesday morning as the parent shortwave trough closes into an upper low across the Lower Great Lakes and Upper Ohio Valley region. Rain and snow showers are expected through at least Thursday as model ensembles indicate the low will persist across the region. The upper low should exit the region Friday, with dry weather returning as high pressure settles in for Saturday. && .AVIATION /12Z MONDAY THROUGH FRIDAY/... A wide range of flight conditions exists this morning, from VFR to LIFR. Showers continue as a surface wave of low pressure was moving along a stationary front from srn OH to SW PA. Generally expect MVFR, and eventually IFR, to become prevalent this morning as low level moisture has increased with overnight rain and thunderstorms. Showers will exit from W-E through the morning as the surface wave exits, and the front drops southward to the Ohio Valley. IFR should gradually improve to MVFR cigs through the afternoon with some limited mixing. Deterioration to MVFR and IFR is expected in showers/isolated thunderstorms again tonight as a stronger surface low tracks along the front, and pulls it north as a warm front. Included a prob30 mention of thunder for now for ports south of a PHD-AGC-LBE line, where elevated instability is expected. .Outlook... Restrictions in showers and embedded thunderstorms are expected on Tuesday as surface low pressure tracks across the Lower Great Lakes, initially pulling a warm front northward Tuesday morning. The low's associated cold front will cross in the afternoon and evening, with additional showers and thunderstorms. Restrictions and gusty WSW-WNW winds are expected Wednesday and Thursday with rain and snow showers under an upper low. Restrictions are possible Friday under cold NW flow and an upper trough. && .HYDROLOGY... Widespread rounds of rain will periodically continue through Tuesday. The initial rounds should act to saturate the ground, resulting in an increased flood potential as additional showers and thunderstorms occur, especially Monday night and Tuesday. Ensemble probabilities for at least 2 inches of total rainfall range from 30-60 percent, with the highest values seen across WV and the Laurel Highlands. In general, 1-3 inches of total rainfall is expected through the period, with localized higher amounts possible across WV. The highest rainfall rates are expected to fall Monday night into Tuesday morning. This may result in areas of flooding. Our area remains in a Marginal Risk (1/5) for excessive rainfall during this period. Model ensembles also continue to indicate rises on area rivers as runoff from the rainfall occurs. && .PBZ WATCHES/WARNINGS/ADVISORIES... PA...Flood Watch through Tuesday evening for PAZ031-075-076. OH...Flood Watch through Tuesday evening for OHZ057>059-068-069. WV...Flood Watch through Tuesday evening for WVZ004-012-021-509>514. && SYNOPSIS...88 NEAR TERM...Craven/Kramar/88 SHORT TERM...Cermak/88 LONG TERM...Cermak/88 AVIATION...WM HYDROLOGY...MLB
Hazardous Weather Outlook National Weather Service Pittsburgh PA 333 AM EDT Mon Apr 1 2024 PAZ007>009-013>016-022-077-078-020745- Mercer-Venango-Forest-Lawrence-Butler-Clarion-Jefferson PA-Armstrong- Indiana-Higher Elevations of Indiana- 333 AM EDT Mon Apr 1 2024 This Hazardous Weather Outlook is for western Pennsylvania. .DAY ONE...Today and tonight. No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Several rounds of rain through Tuesday could result in localized areas of flooding Tuesday. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to Standard Operating Procedures. OHZ039>041-048>050-PAZ020-021-029-073-074-WVZ001>003-020745- Tuscarawas-Carroll-Columbiana-Coshocton-Harrison-Jefferson OH-Beaver- Allegheny-Washington-Westmoreland-Higher Elevations of Westmoreland- Hancock-Brooke-Ohio- 333 AM EDT Mon Apr 1 2024 This Hazardous Weather Outlook is for east central Ohio, southwest Pennsylvania, western Pennsylvania, and northern West Virginia. .DAY ONE...Today and tonight. Hazardous weather is not expected at this time. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Rainfall totals ranging from 1 to 3 inches are possible by Tuesday evening, which could result in areas of flooding, along with elevated river levels. In addition, there is a marginal risk of severe thunderstorms Tuesday. Damaging wind and large hail will be the main hazards. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to Standard Operating Procedures. PAZ075-076-020745- Fayette-Higher Elevations of Fayette- 333 AM EDT Mon Apr 1 2024 ...FLOOD WATCH REMAINS IN EFFECT FROM 2 AM EDT MONDAY THROUGH TUESDAY EVENING... This Hazardous Weather Outlook is for southwest Pennsylvania. .DAY ONE...Today and tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Flood Watch. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Flood Watch. Rainfall totals ranging from 1 to 3 inches are possible by Tuesday evening, which could result in areas of flooding, along with elevated river levels. In addition, there is a marginal risk of severe thunderstorms Tuesday. Damaging wind and large hail will be the main hazards. Snow showers will be possible beginning late Wednesday, with accumulations of up to 1-3 inches possible in the WV ridges (locally higher in eastern Tucker County, WV) by Friday morning. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to Standard Operating Procedures. OHZ057>059-068-069-PAZ031-WVZ004-012-021-509>514-020745- Muskingum-Guernsey-Belmont-Noble-Monroe-Greene-Marshall-Wetzel- Marion-Monongalia- Ridges of Eastern Monongalia and Northwestern Preston-Preston- Eastern Preston-Western Tucker-Eastern Tucker- 333 AM EDT Mon Apr 1 2024 ...FLOOD WATCH REMAINS IN EFFECT FROM 2 AM EDT MONDAY THROUGH TUESDAY EVENING... This Hazardous Weather Outlook is for east central Ohio, southwest Pennsylvania, and northern West Virginia. .DAY ONE...Today and tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Flood Watch. Flood Watch. In addition, there is a marginal risk of severe thunderstorms this afternoon and evening with damaging wind and large hail the main hazards. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Flood Watch. Flood Watch. Rainfall totals ranging from 1 to 3 inches are possible through Tuesday. This could result in flooding, along with elevated river levels through midweek. Severe thunderstorms are possible again on Tuesday. Damaging wind and large hail are expected to be the main hazards. Snow showers will be possible late Wednesday through Friday, with accumulations of up to 1-3 inches possible in the WV ridges (locally higher in eastern Tucker County, WV). .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to Standard Operating Procedures.
The Pittsburgh radar (KPBZ), 111 km away, was scanning. The volume nearest the first event began at 12:49 UTC.
3 flood, 1 flash flood. Local standard time, as filed.
A trained spotter reported downtown roads in Quaker City have 2 feet of water. Route 513 |just north of town is nearly impassable.
Broadcast media reported flooding along McMahon Creek and Williams Creek.
A emergency manager reported Pipe Creek out of its banks and flooding along Pipe Creek Road.
Reports of flooded fields and streams out of their banks near Lore City, OH.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Ohio in 2024Every state in 2024This day in weather historyWarnings in Ohio, April 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: 1171424, 1171426, 1171427, 1171428.