Category Archives: Surface Weather Map

November 14, 2015 – 12z

A cold front has moved southeast across New England and New York state overnight.  High pressure centers are found over northwest Alabama and northwest Colorado.  A cold front has moved onshore the Pacific Northwest.  Another cold front is approaching the northern North Dakota border.

Temperatures have dropped below 32 degrees from the western Great Lakes to the Southeast U.S.  In Tennessee, most temperatures are in the 20′s this morning.  Sub-32 degree temperatures are also found across the Rockies and Central Great Basin.

There are areas of moderate to occasionally heavy rain over southwest Texas and across Washington.  Otherwise, any precipitation across the country is spotty and very light.

November 14, 2015 – 0z

A filling area of low pressure is located just northeast of Maine.  Cold air / temperatures in the 20′s / is filtering southward across the northern Great Lakes.  The center of surface high pressure has moved into Arkansas, and another center is located over northwest Colorado.  A trough has moved across the Pacific Northwest and is now located across western portions of the Northern Intermountain region.  Warm air is beginning to move back to the northeast across California and the Southwest U.S.

The coldest air is found across Minnesota and Wisconsin where temperatures are sub-32 degrees.

Heavy rain is still occurring across western Washington and northwest Oregon.  Lighter precipitation extends eastward into western Montana.  A few showers are found over southwest Texas, and showers and thunderstorms are occurring across far south Florida.  Some light precipitation continues to fall from northwest Pennsylvania northeastward into New England.

November 13, 2015 – 12z

There are a couple of deep surface lows this morning just north of New York state and over eastern Maine.  The cold front which was moving across the country over the past couple of days has now left the domain of this map.  Cool high pressure has a couple of centers, one over Oklahoma and another over northwest Colorado.  A warming down slope wind is found over Montana, and a stationary front extends from California to Arizona.  A trough of low pressure is located over central sections of Washington and Oregon.

Freezing temperatures cover most of the Northern and Central Plains, as well as the Central and Southern Rockies, and from the Northern Intermountain region to the Southwest U.S.

There are light showers over east Texas, and a mix of light rain and snow extends from the Great Lakes eastward across New England.  Light precipitation extends from Montana westward to the Washington coast where the rain becomes quite heavy.

November 13, 2015 – 0z

A deep (989 mb) cyclone is located just northeast of Lake Huron.  A cold front arcs southeastward across New York and then southward across the Mid-Atlantic and Southeastern U.S.  A reinforcing surge of cold air is pushing south to the west of the low, approaching northern Minnesota and Upper Michigan.  Light snow is falling across northern Minnesota, and light rain extends from the Great Lakes, eastward across New England.

Warmer air is beginning to make a return northward across California and Arizona.  This is impinging on a large area of high pressure that extends from the Northern Intermountain region southeastward to the Lower Mississippi Valley.  Most of the sub-32 degree temperatures across the country are found from Montana southward into Colorado.

Finally, a trough moving onshore of the Pacific Northwest is generating heavy precipitation across western Washington and northwest Oregon.

November 12, 2015 – 12z

The dominant weather feature this morning continues to be the deep cyclone (988 mb) located near Green Bay, Wisconsin.  A cold front extends southward across the Ohio Valley and Tennessee Valley to southern Mississippi.  Cool, high pressure has become established across the western 1/3 of the country.  Sub-freezing temperatures are being observed across this area and the cold air has spilled eastward across the High Plains and Upper Mississippi Valley.  Rain is falling over much of the Great Lakes region, and this precipitation extends southward across the Ohio Valley and south to the Lower Mississippi Valley.


November 12, 2015 – 0z

There is only one significant weather maker on the map this evening, but it’s an impressive one.  A 989 mb cyclone is located over Iowa with a dry line and cold front extending from the low to the Southern Plains.  Severe thunderstorms this afternoon produced several tornadoes in Iowa.  Strong to severe storms are currently moving across eastern Iowa and northwest Illinois.  Other showers and thunderstorms extend southwestward from Illinois and Indiana to eastern Texas.  The air behind the cold front is not particularly cold, with sub-freezing temperatures being observed in the Rocky Mountains and part of North Dakota.

November 11, 2015 – 12z

The big weather story on the morning map is a rapidly deepening cyclone near the Kansas/Colorado border.  A cold front is pushing eastward and freezing temperatures are common from the Northern Plains to the Southwest U.S.  Snow is falling over parts of Colorado and adjacent areas of Utah, Wyoming and Nebraska.  Very strong north winds are developing just west and north of the cyclone center.

Light rain is being observed over parts of Oregon and Washington, and light rain is falling from New York to New England as a weak warm front lifts northeastward across the area.

The air mass over the Southern Plains is seasonably warm and moist as south winds increase in front of the deepening system.

November 11, 2015 – 0z

Low pressure has deepened off the New Jersey coast this afternoon, and this has started a westward movement of cool air which has spread across New England and New York state.  A weakening high pressure ridge extends from the Ohio Valley into the Southeast U.S.  Rain continues to fall from southern New England westward to Lake Erie.

A cold front is moving southeastward across the Northern and Central Plains, Central Rockies and Southwest U.S.  Rapid cyclogenesis is underway over Colorado.  A warm front is taking shape across Kansas and moist air has been moving northward across Texas and Oklahoma.  Freezing temperatures are confined to the Central and Northern Rockies and part of the Northern Plains.  Some light precipitation is falling from western South Dakota to northern Arizona.  Light precipitation is also accompanying a trough approaching the Pacific Northwest.

November 10, 2015 – 12z

A wave of low pressure is found along the front over southern Maryland.  Showers and thunderstorms have been occurring from near Washington D.C. to North Carolina.  Lighter precipitation extends northwestward from the Capitol into southeast Michigan.  A high pressure ridge extends from the Great Lakes region southward across the Tennessee Valley.

A front extends from the Northern Plains to the Central Rockies and Central Great Basin.  Several waves of low pressure are located along this front.  Scattered areas of light rain and snow extend from California to the Northern Rockies.

Sub-freezing air extends from the Middle Mississippi Valley, northeastward across the Great Lakes and New England.  Sub-freezing air is found across the Northern Plains, Rockies, as well as across the Northern Intermountain region and Central Great Basin.

November 10, 2015 – 0z

The past 12 hours have seen a transition from high to lower pressures across the U.S.  A warm front has moved onshore along the Georgia, South Carolina and North Carolina coasts.  A cold front continues to make southeastward progress across the Central Great Basin.  In between, high pressure has been weakening and the center has now moved off the coast of Massachusetts.  A southerly component to the wind is seen across most of the Plains.   Heavy precipitation, including snow and thunderstorms has been observed across central and northern California.  Lighter activity extends northeastward from there to the Northern Rockies.  Widespread rainfall has been occurring across the Mid-Atlantic with precipitation extending westward into the Ohio Valley.  There are only spotty areas / at mountain locations / observing sub-freezing temperatures.