Aviation Digital Data Service (ADDS)

Output produced by TAFs form (2037 UTC 20 July 2018)
found at http://www.aviationweather.gov/adds/tafs/
 
Forecast for: KNHK (PATUXENT RIVER , MD, US)
Text: TAF KNHK 2015/2115 12008KT 9999 SCT030 BKN260 QNH2995INS
Forecast period: 1500 UTC 20 July 2018 to 0600 UTC 21 July 2018
Forecast type: FROM: standard forecast or significant change
Winds: from the ESE (120 degrees) at 9 MPH (8 knots; 4.2 m/s)
Visibility: 6 or more miles (10+ km)
Ceiling: 26000 feet AGL
Clouds: scattered clouds at 3000 feet AGL
broken clouds at 26000 feet AGL
Weather: no significant weather forecast for this period
Text: BECMG 2106/2108 07009KT 9999 VCSH FEW020 BKN040 OVC100 QNH2991INS
Forecast period: 0600 to 1500 UTC 21 July 2018
Forecast type: BECOMING: Conditions expected to become as follows by 0800 UTC 21 July 2018
Winds: from the ENE (70 degrees) at 10 MPH (9 knots; 4.7 m/s)
Visibility: 6 or more miles (10+ km)
Ceiling: 4000 feet AGL
Clouds: few clouds at 2000 feet AGL
broken clouds at 4000 feet AGL
overcast cloud deck at 10000 feet AGL
Weather: VCSH  (showers in vicinity)
Text: TEMPO 2109/2115 6000 -SHRA BR BKN020 OVC040 T29/2018Z T20/2109Z FN20002
Forecast period: 0900 to 1500 UTC 21 July 2018
Forecast type: TEMPORARY: The following changes expected for less than half the time period
Winds: from the SSW (200 degrees) at 2 MPH (2 knots; 1.0 m/s)
Visibility: 4 miles (6 km)
Ceiling: 2000 feet AGL
Clouds: broken clouds at 2000 feet AGL
overcast cloud deck at 4000 feet AGL
Weather: -SHRA BR  (light rain showers, mist)