High- and Low-Pressure Zones, January
WorldPhysical EnvironmentLocations of high- and low-atmospheric pressure at mean sea level during January.
natureA map illustrates high- and low-pressure zones worldwide for January, with high-pressure zones marked in red and low-pressure zones in blue.
High-Pressure Zones are found in Western North America (1,022 millibars), Northwest Africa (1,024 millibars), North-central Asia (1,044 millibars), Southeast Pacific (1,018 millibars), South Atlantic (1,022 millibars), South Indian Ocean (1,022 millibars) Low-Pressure Zones are found in North Pacific near the Aleutian Islands (984 millibars), North Atlantic near Greenland and Iceland (992 millibars), along the equator in the Central Pacific Ocean, Central Africa, and Western Pacific Ocean, and around the coasts of Antarctica (three lows at 980 millibars).
High | No data | Arid and low water use | Low (<10%) | Low-medium (10-20%) | Medium-high (20-40%) | High (40-80%) | Extremely high (>80%) | Cleveland | Hood | Hualalai | Kilauea | Mauna Loa | Novarupta | Okmok | Redoubt | Shishaldin | Spurr | St. Helens | Vsevidof | Westdahl | Yellowstone | Settled by 400 CE | Settled by 800 CE | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Arizona | 3.34% | 9.37% | 6.97% | 0.448% | 4.52% | |||||||||||||||||||
Utah | 1 | 20.8% | 13.7% | 0.313% | 0.420% | 49.5% | ||||||||||||||||||
Yukon | 0.923% | 99.0% | ||||||||||||||||||||||
Northwest Territories | 0.342% | 3.62% | ||||||||||||||||||||||
District of Columbia | 100% | |||||||||||||||||||||||
Florida | 10.4% | 12.0% | 0.279% | 0.266% | 0.590% | |||||||||||||||||||
Idaho | 0.772% | 13.8% | 28.4% | 8.83% | 44.9% | |||||||||||||||||||
New Hampshire | 17.2% | 33.7% | 40.5% | 8.46% | ||||||||||||||||||||
Rhode Island | 0.183% | 86.5% | 6.09% | |||||||||||||||||||||
Vermont | 7.27% | 88.3% | 4.41% | |||||||||||||||||||||
Nunavut | 0.979% | 18.2% | ||||||||||||||||||||||
Montana | 28.7% | 2.60% | 14.6% | 5.24% | 35.2% | |||||||||||||||||||
Maine | 94.9% | 2.65% | 0.228% | 0.817% | ||||||||||||||||||||
North Dakota | 7.38% | 3.22% | 4.45% | 0.249% | 9.67% | 36.7% | ||||||||||||||||||
Kentucky | 76.6% | 17.7% | 5.68% | |||||||||||||||||||||
Nova Scotia | 0.182% | 80.1% | ||||||||||||||||||||||
Virginia | 11.9% | 0.775% | 16.4% | 1.64% | ||||||||||||||||||||
Delaware | 0.105% | 37.7% | 61.1% | |||||||||||||||||||||
Prince Edward Island | 98.5% | |||||||||||||||||||||||
Saskatchewan | 4.25% | 59.9% | 2.62% | 2.54% | 2.67% | 0.868% | ||||||||||||||||||
Mississippi | 74.5% | 1.57% | 23.9% | |||||||||||||||||||||
West Virginia | 63.6% | 17.6% | 14.6% | |||||||||||||||||||||
Nebraska | 0.605% | 3.54% | 22.3% | 73.5% | ||||||||||||||||||||
Texas | 4.07% | 3.41% | 2.84% | 1.94% | 22.5% | 2.71% | ||||||||||||||||||
Missouri | 45.5% | 14.9% | 0.131% | 5.37% | ||||||||||||||||||||
Louisiana | 54.5% | 20.6% | 5.75% | |||||||||||||||||||||
North Carolina | 0.116% | 12.2% | 54.7% | 3.14% | 0.982% | |||||||||||||||||||
New Brunswick | 99.5% | |||||||||||||||||||||||
Alabama | 92.6% | 5.45% | 0.987% | |||||||||||||||||||||
New Mexico | 30.3% | 0.128% | 7.32% | 21.7% | ||||||||||||||||||||
Kansas | 0.176% | 1.82% | 13.8% | 68.4% | ||||||||||||||||||||
Wisconsin | 5.67% | 25.0% | 40.8% | 9.68% | ||||||||||||||||||||
British Columbia | 92.0% | 1.55% | 0.285% | |||||||||||||||||||||
Newfoundland and Labrador | 74.5% | |||||||||||||||||||||||
New Jersey | 0.162% | 3.07% | 94.0% | 1.76% | ||||||||||||||||||||
South Carolina | 0.748% | 24.6% | 36.2% | |||||||||||||||||||||
Michigan | 56.0% | 3.00% | 4.63% | 9.70% | ||||||||||||||||||||
Alberta | 3.52% | 56.8% | 0.267% | 4.01% | 3.67% | 11.4% | ||||||||||||||||||
Connecticut | 0.460% | 29.6% | 24.9% | 23.8% | 1.35% | |||||||||||||||||||
Pennsylvania | 1.42% | 27.8% | 49.9% | 3.96% | ||||||||||||||||||||
Colorado | 0.795% | 9.40% | 85.2% | |||||||||||||||||||||
Nevada | 8.21% | 0.731% | 1.40% | 0.413% | 2.80% | 24.0% | ||||||||||||||||||
Massachusetts | 0.206% | 0.166% | 33.6% | 8.30% | 30.7% | |||||||||||||||||||
Georgia | 8.71% | 47.0% | 37.9% | |||||||||||||||||||||
New York | 25.4% | 5.89% | 56.3% | 5.19% | 0.401% | |||||||||||||||||||
Maryland | 0.151% | 4.45% | 64.3% | 1.05% | 8.49% | |||||||||||||||||||
Québec | 99.1% | 0.240% | ||||||||||||||||||||||
Manitoba | 0.656% | 83.1% | 11.7% | 2.04% | 1.39% | |||||||||||||||||||
Oklahoma | 11.4% | 5.60% | 4.28% | 17.9% | 30.0% | |||||||||||||||||||
Tennessee | 90.1% | 5.50% | ||||||||||||||||||||||
Ontario | 97.2% | 1.67% | 1.13% | |||||||||||||||||||||
California | 0.688% | 12.5% | 0.232% | 17.8% | 2.26% | 1.00% | ||||||||||||||||||
Arkansas | 12.6% | 46.8% | 33.2% | 6.01% | ||||||||||||||||||||
South Dakota | 32.7% | 3.47% | 37.3% | 22.0% | ||||||||||||||||||||
Ohio | 3.42% | 0.721% | 29.0% | |||||||||||||||||||||
Indiana | 0.434% | 1.19% | 8.61% | 4.78% | ||||||||||||||||||||
Minnesota | 21.0% | 3.81% | 13.1% | 23.4% | 22.0% | |||||||||||||||||||
Iowa | 26.6% | 12.5% | 44.0% | 16.3% | 0.628% | |||||||||||||||||||
Illinois | 30.9% | 0.187% | 44.1% | 9.75% | ||||||||||||||||||||
Alaska | 0.132% | 87.9% | 0.193% | 0.154% | 1.32% | 1 | 1 | 1 | 1 | 2 | 1 | 1 | 1 | |||||||||||
Washington | 72.6% | 3.37% | 5.42% | 0.287% | 6.53% | 2 | ||||||||||||||||||
Wyoming | 21.7% | 0.541% | 70.3% | 1 | ||||||||||||||||||||
Oregon | 14.3% | 48.2% | 11.8% | 4.82% | 0.772% | 0.847% | 2 | |||||||||||||||||
Hawaii | 7.82% | 1 | 14 | 3 | 2.28% | 58.3% | ||||||||||||||||||