Independent weather & climate research · south-central Pennsylvania
The weather, examined more closely.
Live satellite, rivers, radar and severe weather for Pennsylvania, alongside the historical data and research tools that explain what the sky has done here for the last 130 years.
GOES-19 GeoColor · Northeastlatest
NWS forecast · Harrisburg areaLoading forecast…
SPC day 1 · HarrisburgcheckingChecking Pennsylvania alerts…
Rivers · Pennsylvania—Loading gauges…
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Live · 5 min
Satellite & Lightning
GOES-19 GeoColor, visible, infrared, water vapor, air-mass and Sandwich loops, GLM lightning, and a map with radar, lightning density and warnings.
Live · NWPSRivers & Flooding
350+ Pennsylvania forecast points with flood category, 7-day hydrograph, official forecast, local impacts and record crests.
LivePA Severe Weather Desk
Radar, warnings, storm reports, surface obs, SPC outlooks and mesoanalysis on one page.
MRMS · hourlyRainfall Point Map
Tap anywhere in PA or the surrounding states for radar-and-gauge rainfall: this week, the last four weeks, any day of the past year or any range.
StationCamp Hill station
Local conditions and station history from the lab's own weather station.
Dig into an event
Rainfall, storms, soundings
Forecast · GEFS
Ensemble Meteogram
All 31 GEFS members for any spot in PA: temperature plumes, rain and snow odds, wind and a day-by-day probability table out to 16 days.
Research · RRFSPrecip48
48-hour rain as events, with low, central and high scenarios taken from whole model runs. Validated case and workbench preview.
Updated hourlyForecast Verification
How well HRRR forecast each hour's rain over Pennsylvania, scored against MRMS: skill by lead time, case maps and ensemble reliability.
MRMSMRMS Precip Forensics
Build a rainfall-event packet, drilling from event totals to 1-hour windows.
MRMSMRMS Severe Products
Rotation tracks, hail size, lightning and VIL grids for storm surveys.
Storm reportsCentral PA Storm Catalog
14,646 NWS State College storm reports, 1996–2025, filterable on a map.
SPCSPC Mesoanalysis Downloader
Archived mesoanalysis images for any event window.
SoundingsBufkit Explorer
HRRR soundings with Skew-T, hodograph and indices, plus cross-sections.
ModelsForecast Model Packet
NOAA outlooks, model maps and soundings gathered into one offline packet.
Take the long view
Climate history since 1880
Records · ACIS
Climate Records
Daily records, 1991–2020 normals, monthly rankings and climate-index trends for 100+ Pennsylvania stations back to the 1800s.
ReanalysisReanalysis Switchboard
One front door to NOAA PSL reanalysis maps, composites and 20th Century Reanalysis.
HistoryHarrisburg Climate Atlas
130 climate years, 1895–2025: every season's snow, rain, dry spells and monthly ranks, one page per year.
SnowSnow Season Explorer
Every snow season since 1880 for seven Pennsylvania and Maryland cities.
Snow · statsNortheast Snow Workbench
Compare snowfall records across PA and 7 neighbouring states: extremes, trends, decorrelation and spatial patterns.
ACIS · dataACIS Data Studio
Every RCC-ACIS service in one place: station metadata, daily and hourly data, gridded data and boundaries, with maps and downloads.
SnowHarrisburg Winter Dashboard
73 storms since 2000 with snowfall maps, wind, ice and records.
DroughtPA Drought Intelligence
Drought index history 1895–2025, persistence and the 2024–25 drought.
StationsStation Network History
How Pennsylvania's observing network grew and thinned since the 1800s.
ResearchResearch & Learn
Guides, case studies and deeper investigations of weather data.
CPA Weather Lab · independent research from south-central Pennsylvania. Data from NOAA/NESDIS, the National Weather Service, NWPS, SPC, USGS, the Iowa Environmental Mesonet and others. Not an official forecast or warning source.