Weather Alerts For Cheswick, PA

A Weather Alert has been issued for a nearby area. While your current location is outside of the impacted area, please stay alert and monitor weather conditions. # HEADLINE -------------------- FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 545 AM EDT EARLY THIS MORNING FOR NORTHEASTERN JEFFERSON OH, SOUTHERN ALLEGHENY, CENTRAL WASHINGTON, BROOKE AND HANCOCK COUNTIES # SUMMARY -------------------- At 447 AM EDT, local law enforcement reported flooding from recent thunderstorms that produced heavy rainfall in the warned area. Between 0.5 and 2 inches of rain have fallen. Flooding impacts will continue, but no additional rainfall is expected. # DETAILS -------------------- HAZARD Flash flooding caused by thunderstorms. SOURCE Law enforcement reported. IMPACT Flash flooding of small creeks and streams, urban areas, highways, streets and underpasses as well as other poor drainage and low-lying areas. SOME LOCATIONS THAT WILL EXPERIENCE FLASH FLOODING INCLUDE Mount Lebanon, Bethel Park, McMurray, Weirton, Washington, Canonsburg, Gastonville, Baldwin, Upper St. Clair, Scott Township, Whitehall, South Park Township, Cecil-Bishop, Jefferson Hills, Castle Shannon, Pleasant Hills, Clairton, Bridgeville and Toronto. ISSUED AT Friday, September 4, 2026 at 4:47 AM EDT ISSUED BY National Weather Service Pittsburgh PA HEADER Flash Flood Statement # PRECAUTIONARY/PREPAREDNESS ACTIONS -------------------- Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Be especially cautious at night when it is harder to recognize the dangers of flooding. # AREAS AFFECTED -------------------- Allegheny PA, Brooke WV, Hancock WV, Jefferson OH, Washington PA

There is a Marginal Severe Storm Risk for your location. Continue reading for today's outlook from the National Weather Service's Storm Prediction Center. -------------------- National Severe Storm Outlook THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THIS EVENING ACROSS PART OF THE MID ATLANTIC INTO MIDDLE OHIO VALLEY...AND ACROSS PARTS OF THE UPPER MIDWEST SUMMARY Scattered strong thunderstorm development, posing mainly a risk for severe wind and hail, remains possible into the overnight hours across parts of the Mid Atlantic and Upper Midwest into the Great Lakes. Mid Atlantic A convectively generated or augmented mid-level perturbation continues to migrate east-southeastward across the upper Ohio Valley, toward the northern Mid Atlantic, along the southern fringe of broadly cyclonic flow overspreading the Northeast. This continues to provide support for a clustering of stronger convective development currently in a corridor across east central Ohio into south central Pennsylvania. Although this activity appears to have waned some in intensity from earlier, updraft inflow emanating from a more moist environment, along and south of a diffuse remnant outflow boundary across the central Maryland through Delmarva Peninsula vicinity, might reinvigorate activity later this evening into the overnight hours. Upper Midwest into Great Lakes region Convective evolution into and through the overnight hours remains a bit unclear. An initial cluster of convection, supported by a short wave impulse now progressing toward the Minnesota/Ontario border vicinity and Lake Superior, is undergoing substantial weakening as inflow becomes more stable to the cool side of a quasi-stationary frontal zone, which roughly extends from the Red River Valley through southern Great Lakes region. Upstream, near the crest of building mid/upper ridging, lower/mid-tropospheric warm advection is supporting scattered renewed thunderstorm development across northwestern and west central Minnesota. Closer to the frontal zone, where the inflow environment is characterized by moderate to strong instability, there still appears potential for the evolution of a small organizing cluster across the Brainerd MN vicinity through mid to late evening. As this progresses eastward, it is not clear that this will be maintained overnight. A strengthening southwesterly low-level jet may focus additional upscale growing thunderstorm development downstream, across parts of northeastern Wisconsin into Lower Michigan, but, elevated to the cool side of the frontal zone, it is not clear that the environment will support more than very limited potential for severe hail and wind.

Pollen Index: 10 Pollen Level: high Predominant Pollen: Ragweed, Chenopods and Nettle. The amount of pollen in the air for Friday will be falling in the moderate range. Since the weather has a major influence on pollen dispersal, this decrease is due in part to falling temperatures, rising humidity, and expected precipitation in the morning, afternoon and evening which tends to wash pollen out of the air. With this amount of reduction in pollen levels, tomorrow should be better for allergy sufferers.