2023年4月4日 · The air pressure everywhere on this map is 300 millibars. The lines represent the height, in meters, of the altitude where the air pressure is 300 mb. An air pressure of 300 millibars is said to occur near 30,000 feet (9,100 meters) in elevation, but the height ranges from near 27,000 to 32,000 feet

3 天之前 · Jet Stream Winds at ~30,000 ft (GFS 10‑day Forecast) Local Weather. Local weather by ZIP or City Local area snow depth CURRENT WEATHER MAPS Fronts & Pressure Centers Current U.S. Temperatures Northwest U.S. Northeast U.S. Mid-Atlantic U.S. Midwest U.S. Central Plains U.S. Southeast U.S. Southern Plains U.S. Southwest U.S. Alaska

Updated: (1 September 2023) SPC is now recreating the UA maps one hour later since Mexican UA data sometimes arrives late. The UA maps are generated at 0101, 0201, 1301, and 1401 UTC (i.e. during Central Daylight Time this is 8:01 pm, 9:01 pm, 8:01 am, and 9:01 am). All 03/09/25 maps available. Data should exist back to around 11/30/98.

Look at the 300 mb chart in this section labeled "Time 1". A jet streak exists from Colorado to Montana. The highest wind speeds in the jet streak (aka jet core, jet surge) are 130 knots (150 miles per hour) in southern Wyoming. Parcels within the jet streak are diving to the southeast.

Current Analysis Maps of Jet Stream, 300mb, 500mb, 700mb, 850mb levels. Balloon Soundings & Aviation related charts.

Current Weather Map 300 mb observed fields for geopotential height, wind speed and wind vectors. 300 mb charts depict conditions in the upper troposphere (roughly 9000 meters) where most of the weather producing phenomena occur, otherwise known as the jet stream level.

The 300 millibar (mb) map plots a variety of information collected by weather balloons and represents atmospheric conditions at an altitude of approximately 9300 meters (30,000 feet). The map displays: The height of the 300 mb level (meters) in black contours at 60-meter intervals.

The 300 mb map features height contours in black, wind barbs (also in black, and isotachs (lines of constant wind speed) represented by the progressively "hotter" colors. This map and the others...

300 mb Height (m), Divergence, Wind/Isotach (kt) Click on image to open 6-frame loop.

View GFS weather model forecast map image for 300 mb Height, Wind in Continental US on pivotalweather.com.