National Weather Service United States Department of Commerce

Tropical Moisture Brings Slight Risk of Excessive Rainfall to the Southwest; Strong to Locally Severe Storms on the Plains

Heavy rain and flash flooding are possible across portions of the Southwest through Friday, where Flood Watches are in effect. Strong to locally severe thunderstorms are possible today across portions of the Plains. A tropical wave is causing heavy rainfall in Puerto Rico and the Virgin Islands, which may cause urban and small stream flooding and landslides today. Read More >

Overview

June 22nd was a highly unstable day, and became the busiest and most widespread severe weather day of the year so far. A thunderstorm wind gust/squall estimated at 60 mph occurred at the NWS Office in State College. This squall lasted almost 2 minutes, and was accompanied by pea size hail at the office. Numerous large hail reports also came in from many locations in and around the rest of State College. Many trees were downed, as the storms were mainly bow echoes, with occasional rotation present. Numerous reports of large hail also came in from across Central PA.

Image
Balloon Sounding from KLWX (Washington DC). See the Positive Area (a.k.a. "B+" or "CAPE") is almost 2800 J/kg! That is Highly Unstable.
nws logo Media use of NWS Web News Stories is encouraged!
Please acknowledge the NWS as the source of any news information accessed from this site.
nws logo