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Baltimore Wash International Airport Baltimore, MD, United States	About this Station Station Home Page Data Inventories DATA Station History State Climatologist Regional Climate Center Information at Other Sites National Weather Service - Eastern Region Headquarters - Regional Forecast Office - Current Weather Conditions - Current Weather Forecast - Current Precipitation/Flood Warning Current Radar Current Satellite Sunrise/Sunset
ASOS Photographs Other Stations in Baltimore List Stations in Division MD-04 List Stations in Anne Arundel County List Stations within 5, 10, 25, or 50 miles Type* : LAND SURFACE COOP AB ASOS ASOS-NWS Call Sign/ICS* : BWI (BAL) / KBWI WBAN* : 93721 COOP ID* : 180465 Climate Division* : MD-04 - Upper Southern WMO ID* : 72406 In Service* : 01 Jun 1950 to Present Elevation* : 47.5m (156') above s/l Lat/Lon* : 39°10'N / 76°41'W County* : Anne Arundel

Other Stations in Baltimore

About this Station

Baltimore-Washington International Airport lies in a region about midway between the rigorous climates of the North and the mild climates of the South, and adjacent to the modifying influences of the Chesapeake Bay and Atlantic Ocean to the east and the Appalachian Mountains to the west. Since this region is near the average path of the low pressure systems which move across the country, changes in wind direction are frequent and contribute to the changeable character of the weather. The net effect of the mountains to the west and the bay and ocean to the east is to produce a more equable climate compared with other continental locations farther inland at the same latitude.

Rainfall distribution throughout the year is rather uniform, however, the greatest intensities are confined to the summer and early fall months, the season for hurricanes and severe thunderstorms. Moisture deficiencies for crops occur occasionally during the growing season, but severe droughts are rare. Rainfall during the growing season occurs principally in the form of thunderstorms, and rainfall totals during these months vary appreciably.

The average date for the last occurrence in spring of temperatures as low as 32 degrees is mid-April. The average date for the first occurrence in fall of temperatures as low as 32 degrees is late October. The freeze-free period is approximately l94 days.

In summer, the area is under the influence of the large semi-permanent high pressure system commonly known as the Bermuda High and centered over the Atlantic Ocean near 30 degrees N Latitude. This pressure system brings warm humid air to the area. The proximity of large water areas and the inflow of southerly winds contribute to high relative humidities during much of the year. January is the coldest month, and July, the warmest. Snowfall occurs on about eleven days per year on the average, however, an average of only about six days annually produces snowfalls of 1 inch or greater. Snow is frequently mixed with rain and sleet, and snow seldom remains on the ground more than a few days.

Glaze or freezing rain which is hazardous to highway traffic occurs on an average of two to three times per year, generally in January or February. Some years pass without the occurrence of freezing rain, while in others it occurs on as many as eight to ten days. Sleet is observed on about five days annually with the greatest frequency of occurrence in January.

The annual prevailing wind direction is from the west. Winter and spring months have the highest average wind speed. Destructive velocities are rare and occur mostly during summer thunderstorms. Only rarely have hurricanes in the vicinity caused widespread damage, then primarily through flooding.

Data Inventories

Please note that additional data (digital and non-digital) may be available for this station. Contact NCDC if additional details are needed.


Click on the following where available:


• DAT to obtain digital ascii data (charges may apply),
  Please do not order these data if you do not know what a Digital ASCII File is.
  
• INV to view inventory, or
  
• DOC to view documentation

Surface
DAT INV DOC 3200 -Cooperative Summary Of The Day
DAT INV DOC 3210 -Summary Of The Day - First Order
DAT INV DOC SOD -Daily Surface Data (TD3200/3210 combined)
DAT INV DOC 3220 -Summary Of The Month (SOM) Cooperative
DAT INV DOC 3240 -Hourly Precipitation Data
DAT INV DOC 3280 -Surface Airways Hourly And Airways Solar Radiation
DAT INV DOC 3290 -Summary Observation
DAT INV DOC 3292 -Weather Duration
DAT INV DOC 9950 -DATSAV 2 Surface (see Global Surface Station Information).

DATA

Additional data products may be available for this station. If you can't find what you are looking for here, please try our Most Popular Products page.

Forms, Publications, and Web Pages
Graphs and Other Images
Digital ASCII Files


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Forms, Publications, and Web Pages

Most of these products are publications that have been converted to on-line access. As such, these documents have column headings and are displayed in an easy-to-read format.

For additional information and product samples, click on the icon next to the desired product.

Hourly Precipitation Data for Delaware/Maryland
Daily/Monthly/Annual Delaware/Maryland Climatological Data
Record of Climatological Observations
Annual Climatological Summary
Storm Data Publication


Miscellaneous Storm Events in Anne Arundel County
    *All Drought Dust Storm Flood Fog Hail Hurricane & Tropical Storm Lightning Tornado Wild/Forest Fire Ocean/lake Surf Precipitation Snow & Ice Temperature Extremes Thunderstorm & High Wind

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Graphs and Other Images

Includes contour maps, time series, NEXRAD radar mosaics, and satellite images.

For additional information and product samples, click on the icon next to the desired product.

National Mosaic Reflectivity Images
Miscellaneous Satellite Images


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Digital ASCII Files

These files may or may not contain column headers. In order to use these files, you will need to import them into a spreadsheet or database package for presentation. Please do not order these data if you do not know what a Digital ASCII File is. A sample Digital ASCII File is available for viewing but content varies a great deal depending on your request. Other digital files are available Offline that may contain data for this station.

For additional information and product samples, click on the icon next to the desired product.

SOD -Daily Surface Data (TD3200/3210 combined)
3220 -Summary Of The Month (SOM) Cooperative
3240 -Hourly Precipitation Data

Station History

Please Note that this station shares the same COOP ID Number and the same Data as
Baltimore.

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