National Weather Service United States Department of Commerce
 

This is the home page for emergency managers to do a self briefing.  For information on a particular hazard, just click on the appropriate tab below.

24-hour Day 1 Minimum Relative Humidity

Today's Minimum Relative Humidity

Map displays 24 hour minimum relative humidity values for Day 1.

Map is updated every time the forecaster issues a new forecast.

24 Hour Day 2 Minimum Relative Humidity
 

Tomorrow's Minimum Relative Humidity

Map displays 24 hour minimum relative humidity values for Day 2.

Map is updated every time the forecaster issues a new forecast.

       

Storm Prediction Center Fire Outlook Day 1
Day 1 Fire Weather Discussion

Today's Outlook

The Day 1 Outlook covers the 24-hour period from 12Z on the morning of product issuance to 12Z the following morning, with the update covering the 19-hour period from 17Z at issuance to 12Z the following morning.

Storm Prediction Center Fire Outlook Day 2Day 2 Fire Weather Discussion

Tomorrow's Outlook

The Day 2 Outlook covers the following 24-hour period after Day 1 out to 48 hours. The Day 2 Fire Weather Outlook is scheduled for issuance at 10Z and is updated at 20Z.

       
Storm Prediction Center Fire Outlook Days 3-8Day 3-8 Fire Wx Discussion

Day 3-8 Outlook

The Day 3-8 Outlook covers the period of 48 to 192 hours from 12Z on the morning of product issuance. The Day 3-8 Fire Weather Outlook is scheduled for issuance at 22Z.

Short Range Ensemble Forecast (SREF) Products
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Short-Range Ensemble Forecast (SREF)

Short-Range Ensemble Forecast  is produced by postprocessing the 21 members NCEP SREF plus the operational WRF-NAM for a total of 22 members. Special emphasis is placed on high-impact, mesoscale guidance including fire weather.

       

Weather Hazards MapHazards Assessment

Weather Hazards

Map displays active watch, warnings, advisories and short term forecasts in the lower 48 states. Map automatically refreshes every five minutes.

Loop of sea-level pressures and fronts through day 7

Surface Analysis

The Weather Prediction Center (WPC) produces surface maps which depicts the analysis of  highs, lows, fronts, troughs, outflow boundaries, squall lines, and drylines.
 

AHPS

River Forecast Points

Map displays river points in Pennsylvania, Ohio, West Virginia and Maryland.  Just click on the point where you want a forecast.

Map is updated every time a new observation or forecast is generated.
Observed Precipitation

Observed Precipitation

Ohio River Forecast Center
Rain Gauge Totals.

Observed Precipitation Page

       
24 Hour Total Precipitation Forecast

24 Hour Total Precipitation Forecast

Map displays 24hr forecasted precipitation amounts.

Map is updated every time the forecaster issues a new forecast.

3 Day Precipitation Forecast

3 Day Total Precipitation Forecast

Map displays 3 Day forecasted precipitation amounts.

Map is updated every time the forecaster issues a new forecast.

       
Flash Flood Guidance

Flash Flood Guidance

Flash Flood Guidance is an estimate of the amount of rainfall required over a given area during a given duration to cause small streams to flood issued by Ohio River Forecast Center.

Flash Flood Guidance Graphics

Departure From Normal

Precipitation / Departure

The precipitation totals used in these graphics and the accompanying text products are from the 6-hourly county mean areal precipitation calculated for use in the NERFC's Community Hydrologic Prediction System.

Precipitation/Departure Graphics

       
Hazards

Weather Hazards

Map displays active watch, warnings, advisories and short term forecasts in the lower 48 states. Map automatically refreshes every five minutes.

Significant Flood Outlook

Significant River Flood Outlook

This Flood Outlook is intended to provide a general outlook for significant river flooding. It is not intended to depict all areas of minor flooding or small-scale events such as localized flooding and/or flash flooding.
       
Historical Streamflow

Historical Streamflow

Map of real-time streamflow compared to historical streamflow for the day of the year.

Snow Analyses

National Snow Analyses

Includes data on snow water equivalent, snow depth and more. The data can be view for a day or animated for a two week period or a seaon.

CONUS & Southern Great Lakes & Allegheny Front & MidWest

24hr Max Apparant T

24 Hour Maximum Apparent Temperature

Map displays the 24 hour maximum apparent temperatures. Map gets updated every time the NWS in Pittsburgh produces a new grid.

Max T

Today's Maximum Temperature

Map displays the maximum temperature for day one.

Map is updated every time the forecaster issues a new forecast.

       
Max T

Tomorrow's Maximum Temperature

Map displays the maximum temperature for day two.

Map is updated every time the forecaster issues a new forecast.

Max T

Day 3 Maximum Temperature

Map displays the maximum temperature for day three.

Map is updated every time the forecaster issues a new forecast.

       

Weather Hazards MapHazards Assessment

Weather Hazards

Map displays active watch, warnings, advisories and short term forecasts in the lower 48 states. Map automatically refreshes every five minutes.

Loop of sea-level pressures and fronts through day 7

Surface Analysis

The Weather Prediction Center (WPC) produces surface

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Great Lakes Radar

Radar

WSR-88D Doppler Radar

Pittsburgh | Cleveland
State College | Charleston, WVy

Great Lakes Sector | Loop
Nationwide | Loop

Storm Prediction Center

Storm Prediction Center Overview Graphic / Map

Radar of the contiguous United States with Storm Prediction Center (SPC) products - Day 1.

SPC & its Products

       

SPC Outlook Day 1

About Convective Outlooks

Convection Outlooks 

Convective outlook  for organized severe thunderstorms over the contiguous United States.

Day 1 Outlook
Day 2 Outlook
Day 3 Outlook
Days 4-8 Outlook

Current Watches

About Severe Weather Watches

Current Watches

Graphic showing any severe thunderstorm and tornado watches which are in effect over the contiguous United States.

Severe & Tornado Watches

       

Latest Surface AnalysisNational Forecast Maps

Surface Analysis

The Weather Prediction Center (WPC) produces surface maps which depicts the analysis of  highs, lows, fronts, troughs, outflow boundaries, squall lines, and drylines.

PA Regional Observations
OH Regional Observations
WV Regional Observations
MD Regional Observations
Rainfall Reports

Mesoscale Discussions

Mesoscale Discussions

Describe what is currently happening, what is expected in the next few hours, the meteorological reasoning for the forecast, and when / where SPC plans to issue the watch.

Current Mesoscale Discussions

       
Upper Air Sounding Map

Upper Air Soundings

Skew-T charts for all observed soundings across the United States. An archive of seven days of data is available.

Observed Soundings

Storm Reports

Monthly / Annual Summaries

Storm Reports

These reports are preliminary and are plotted and listed "as is" from NWS Local Storm Reports usually sent in realtime.

Pittsburgh's Preliminary Local Storm Reports

       

Upper Air Map

Forecast Tools

Including upper air mapsupper air soundingsmesoanalysis graphics, Short-Range Ensemble Forecast (SREF), Storm-Scale Ensemble of Opportunity (SSEO) and Compmap.

SPC Mesoscale Sectors

Mesoscale Analysis

Nine fixed regional sectors and a national sector provide hourly gridded mesoanalysis graphics across the CONUS.

Northeast Sector

NOAA's 2013 Atlantic Basin Hurricane Outlook

 

NHC Active Tropical Cyclones

Active Tropical Cyclones

Indicates areas/chances of tropical/sub-tropical cyclone development over the next 48  hours.

Atlantic Tropical Weather Discussion

NHC Data in GIS Formats

Graphical Tropical Weather Outlook

Graphical Tropical Weather Outlook

Highlights the location of areas of disturbed weather and shows the 48 hour probabilistic genesis potential.

Atlantic Tropical Weather Outlook

       

Tropical Cyclone Potential Impacts Graphics

Tropical Cyclone Potential Impacts

The TCI Graphics web site is an internet-based decision-support service consisting of at least four graphics: high wind impacts, coastal flooding impacts, inland flooding impacts, and tornado impacts.

Hurricane Local Statement - Interactive Text Reader

Hurricane Local Statement Interactive Text Reader

It is active whenever tropical cyclone watches/warnings are in effect locally, and refreshed with each issuance of the HLS by your local forecast office.

       

Tropical Atlantic Weather Map

Tropical Atlantic Weather Map

Surface analysis of weather features across the tropical Atlantic.

 Tropical Atlantic Infrared Satellite

Tropical Atlantic Satellite Imagery

NHC Aircraft Reconnaissance Plans & Data

       

Latest Surface Analysis Short Range Forecast Maps

Surface Analysis

The Weather Prediction Center (WPC) produces surface maps which depicts the analysis of  highs, lows, fronts, troughs, outflow boundaries, squall lines, and drylines.

NOAA nowCOAST - GIS mapping Portal

Great Lakes Radar

Radar

WSR-88D Doppler Radar

Pittsburgh | State College
Dual-Pol Data | Training
Great Lakes Sector | Loop
Southeast Sector | Loop
Nationwide
| Loop

       

Weather Hazards Map

National Forecast Maps

Weather Hazards

Map displays active watch, warnings, advisories and short term forecasts in the lower 48 states. Map automatically refreshes every five minutes.

Loop of sea-level pressures and fronts through day 7

National Data Buoy Center

National Data Buoy Center

NDBC provides hourly observations from a network of about 90 buoys and 60 Coastal Marine Automated Network stations. All stations measure wind (speed/direction/gust) and barometric pressure and air temperature.

       

Storm Surge

Storm Surge Products

Storm Surge

Along the coast, storm surge is often the greatest threat to life and property from a hurricane. The size of a storm surge for a particular location depends on a number of factors. Storm surge is very sensitive to the shape of the coast, and to changes in storm track, intensity, forward speed, and size. Tidal height at the time of maximum storm surge is an important factor.

Category

Winds
mph
Depression <39
T. Storm 39-73
Hurricane 1 74-95
Hurricane 2 96-110
Hurricane 3 111-129
Hurricane 4 130-156
Hurricane 5 > 156

Saffir-Simpson Hurricane Wind Scale

Category 1 to 5 rating based on a hurricane's sustained wind speed.

Effects and Damage Estimates

       

Number of Tropical Cyclones per 100 Years

Tropical Cyclone Names

NWS JetStream
Tropical Weather

Tropical Cyclone Climatology

The official hurricane season for the Atlantic Basin (the Atlantic Ocean, the Caribbean Sea, and the Gulf of Mexico) is from June 1st to November 30th.

The peak of the season is from mid-August to late October. However, deadly hurricanes can occur anytime in the hurricane season.

Tropical Cyclones - pdf brochure Updated April 2013

Hurricane Tracks

Historical Hurricane Tracks

NOAA Historical Hurricane Tracks Tool - interactive database.

More than 6,000 tropical cyclones, ranging from 1842 and occurring in over seven major ocean basins around the world,  are now searchable thanks to the incorporation of NOAA’s International Best Track Archive for Climate Stewardship (IBTrACS) data set.

Complete Winter Weather Page from the National Weather Service office in Pittsburgh, PA

 

PBZ Storm Total Snow

Storm Total Snow Forecast

Shows current Storm Total Snow forecast. The time is variable as it pertains to each specific storm.

Map is updated every time the forecaster issues a new forecast.

Storm Total Ice Forecast

Storm Total Ice Forecast

Shows current Storm Total Ice forecast. The time is variable as it pertains to each specific storm.

Map is updated every time the forecaster issues a new forecast.

       
24hr Snow Forecast

24hr Total Snow Forecast

Shows forecasted snowfall accumulations for the first 24 hours of the forecast.

Map is updated every time the forecaster issues a new forecast.

Snowfall / Rainfall Reports

24hr Ice Forecast

24hr Total Ice Forecast

Shows forecasted ice accumulations for the first 24 hours of the forecast.

Map is updated every time the forecaster issues a new forecast.

       
24 Hour Total Precipitation Forecast

24 Hour Total Precipitation Forecast

Shows forecasted precipitation for the first day of the forecast.

Map is updated every time the forecaster issues a new forecast.

3 Day Total Precipitation Forecast

3 Day Total Precipitation Forecast

Shows forecasted precipitation for the first three days of the forecast.

Map is updated every time the forecaster issues a new forecast.

       
Max T

Today's Maximum Temperature

Map displays the maximum temperature for day one. Map gets updated every time the NWS in Burlington produces a new grid.

Map is updated every time the forecaster issues a new forecast.

Min Temp Day 1

Today's Minimum Temperature

Shows forecasted minimum temperature for the first day of the forecast.

Map is updated every time the forecaster issues a new forecast.

       
Max Temp Day 2

Tomorrow's Maximum Temperature

Map displays the maximum temperature for day two. Map gets updated every time the NWS in Burlington produces a new grid.

Map is updated every time the forecaster issues a new forecast.

Min Temp Day 2

Tomorrow's Minimum Temperature

Shows forecasted minimum temperature for the second day of the forecast.

Map is updated every time the forecaster issues a new forecast.

       

Minimum Wind Chill Temperature

Today's Minimum Wind Chill Temperature

Shows forecasted minimum wind chill temperatures for the first day of the forecast.

Map is updated every time the forecaster issues a new forecast.

Radar Great Lakes

Radar

WSR-88D Doppler Radar

Pittsburgh | Cleveland
State College | Charleston WV

Great Lakes Sector | Loop
Nationwide | Loop
       
National Snow AnalysesU.S. Snow Monitoring

National Snow Analyses

Includes data on snow water equivalent, snow depth and more. The data can be view for a day or animated for a two week period or a season.

CONUS & Allegheny Front & Southern Great Lakes & Midwest

Hourly Weather Graph

Hourly Weather Graph

Shows hourly information for any location in Pennsylvania, Ohio, West Virginia or Maryland.