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North America - Pressure tendency (hPa last 3 hours)
Thursday 25 Aug 2016 19:00 BST

Stations: 870 SLP tendency
Abbotsford Airport (58 m, British Columbia) - 1.1
Aberdeen Airport (397 m, South Dakota) - 0.8
Abilene Airport (546 m, Texas) - 0.6
Adak (5 m, Alaska) - 0.3
Agassiz (15 m, British Columbia) - 1.4
Akron- Canton Airport (377 m, Ohio) - 0.5
Albany Airport (89 m, New York) - 1.6
Albuquerque Airport (1618 m, New Mexico) - 0.4
Alert (65 m, Nunavut) - 0.4
Algonquin Provincial Park (410 m, Ontario) - 0.2
Allen Army Airfield (391 m, Alaska) - 0.0
Alpena (211 m, Michigan) - 0.3
Amqui (166 m, Quebec) - 1.1
Aniak Airport (26 m, Alaska) - 1.0
Annette Island Airport (110 m, Alaska) - 1.4
Apalachicola Airport (6 m, Florida) - 1.4
Arcata-Eureka Airport (18 m, California) - 0.3
Argentia (15 m, Newfoundland) - 0.5
Armstrong (243 m, Ontario) - 2.1
Armstrong (243 m, Ontario) - 0.1
Armstrong Airport (323 m, Ontario) - 0.3
Arviat (10 m, Nunavut) - 0.0
Asheville Regional Airport (661 m, North Carolina) - 1.2
Assiniboia Airport (726 m, Saskatchewan) - 0.9
Astoria Regional Airport (7 m, Oregon) - 0.6
Athens Ben Epps Airport (247 m, Georgia) - 1.7
Atikokan (389 m, Ontario) - 0.3
Atlanta Airport (315 m, Georgia) - 1.5
Atlantic City Airport (20 m, New Jersey) - 1.6
Augusta Regional Airport (45 m, Georgia) - 1.8
Austin (189 m, Texas) - 0.7
Austin Straubel Intl. Airport (209 m, Wisconsin) - 0.3
Badger (103 m, Newfoundland) - 1.0
Baie Comeau Climate (28 m, Quebec) - 0.2
Baie-Comeau (130 m, Quebec) - 0.3
Baie-Comeau Airport (22 m, Quebec) - 0.2
Baie-D'Urfé (39 m, Quebec) - 0.4
Baker Lake (51 m, Nunavut) - 0.2
Baker Lake Airport (18 m, Nunavut) - 0.3
Ballenas Island (13 m, British Columbia) - 0.8
Baltimore Airport (47 m, Maryland) - 1.5
Bancroft (331 m, Ontario) - 0.5
Banff (1397 m, Alberta) - 1.1
Barkley Regional Airport (126 m, Kentucky) - 0.3
Barrhead (648 m, Alberta) - 0.0
Barrie-Oro (289 m, Ontario) - 0.6
Bas Caraquet (5 m, New Brunswick) - 1.6
Bathurst Inlet (929 m, Northwest Territories) - 1.7
Beatrice Climate (297 m, Ontario) - 0.4
Beauceville (229 m, Quebec) - 0.7
Beaven Island (16 m, Nova Scotia) - 1.2
Beaver Mines (1257 m, Alberta) - 0.1
Beaverlodge (745 m, Alberta) - 0.9
Bella Bella (43 m, British Columbia) - 1.0
Berens River (222 m, Manitoba) - 0.1
Beresford Airport (59 m, New Brunswick) - 2.1
Bethel Airport (44 m, Alaska) - 1.0
Bettles Airport (196 m, Alaska) - 0.1
Big Trout Lake (222 m, Ontario) - 0.8
Big Trout Lake (222 m, Ontario) - 0.9
Billings Logan Intl. Airport (1088 m, Montana) - 1.0
Bismarck Airport (505 m, North Dakota) - 0.8
Bisset (165 m, Nunavut) - 0.7
Blackcomb Base Sliding Center (937 m, British Columbia) - 0.7
Blackcombe Mtn Base (659 m, British Columbia) - 1.2
Blanc-Sablon Airport (32 m, Quebec) - 2.0
Blosser Airport (452 m, Kansas) - 0.5
Blue Grass Airport (301 m, Kentucky) - 0.4
Blue River (683 m, British Columbia) - 1.3
Boise Airport (872 m, Idaho) - 0.4
Bonavista (26 m, Newfoundland) - 0.7
Bonilla Island (17 m, British Columbia) - 1.0
Bouctouche (36 m, New Brunswick) - 1.7
Bow Valley (1298 m, Alberta) - 0.9
Bradley Intl. Airport (55 m, Connecticut) - 1.5
Brandon Airport (416 m, Manitoba) - 0.1
Bratt'S Lake (580 m, Saskatchewan) - 0.6
Brier Island (16 m, Nova Scotia) - 1.0
Broadview AP (600 m, Saskatchewan) - 0.4
Brockville (121 m, Ontario) - 0.5
Brooks (747 m, Alberta) - 0.0
Broughton Island (584 m, Nunavut) - 0.2
Brownsville/South Padre (8 m, Texas) - 0.9
Buffalo Narrows Airport (440 m, Saskatchewan) - 0.4
Buffalo Niagara Intl. Airport (219 m, New York) - 0.4
Burgeo (11 m, Newfoundland) - 0.4
Burlington Intl. Airport (104 m, Vermont) - 1.2
Burlington Piers (AUT) (77 m, Ontario) - 0.4
Burns Airport (1271 m, Oregon) - 0.8
Burns Bog (84 m, British Columbia) - 1.0
Burns Lake Campbell Scientific (713 m, British Columbia) - 1.6
Burwash Landing (57 m, Yukon) - 3.1
Burwash Landing Airport (807 m, Yukon) - 3.1
Buttonville Airport (198 m, Ontario) - 0.8
CFB Bagotville (159 m, Quebec) - 0.0
CFB Borden (224 m, Ontario) - 0.7
CFB Valcartier Airport (168 m, Quebec) - 0.8
Calgary Intl. Airport (1084 m, Alberta) - 1.0
Callaghan Valley (884 m, British Columbia) - 0.8
Cambridge Bay (19 m, Nunavut) - 1.2
Cambridge Bay Airport (23 m, Nunavut) - 1.2
Cameron Falls (AUT) (233 m, Ontario) - 0.3
Campsie (647 m, Alberta) - 0.3
Cap D'Espoir (15 m, Quebec) - 2.1
Cap Tourmente National Wildlife Area (6 m, Quebec) - 0.5
Cap-Chat (5 m, Quebec) - 0.6
Cape Dorset Airport (50 m, Nunavut) - 1.3
Cape Hooper (393 m, Nunavut) - 1.6
Cape Kiglapait (834 m, Newfoundland) - 1.0
Cape Mercy (583 m, Nunavut) - 2.6
Cape Race (27 m, Newfoundland) - 0.7
Cape St James CS (92 m, British Columbia) - 0.9
Cape Stallworthy (72 m, Alberta) - 0.8
Capital Region Intl. Airport (266 m, Michigan) - 0.2
Caribou (187 m, Ontario) - 0.5
Caribou Airport (191 m, Maine) - 1.4
Caribou Point (AUT) (2 m, Nova Scotia) - 0.8
Carmacks (543 m, Yukon) - 1.6
Cartwright Airport (15 m, Newfoundland) - 0.0
Carway Airport (513 m, Alberta) - 0.1
Casper (1612 m, Wyoming) - 0.9
Castlegar Airport (495 m, Nova Scotia) - 1.0
Cathedral Point (31 m, British Columbia) - 1.2
Center for Earth Resources Observations (482 m, South Dakota) - 0.2
Central Nebraska Regional Airport (566 m, Nebraska) - 0.0
Channel-Port aux Basques (40 m, Newfoundland) - 0.8
Chapleau Airport (447 m, Ontario) - 0.4
Charleston Intl. Airport (15 m, South Carolina) - 1.5
Charlevoix (Mrc) (719 m, Quebec) - 0.5
Charlotte Douglas Intl. Airport (234 m, North Carolina) - 1.9
Charlottetown Airport (79 m, Prince Edward Island) - 1.1
Chatham-Kent (178 m, Ontario) - 0.2
Chattanooga Metropolitan Airport (210 m, Tennessee) - 1.9
Chevery (8 m, Quebec) - 1.3
Cheyenne Regional Airport (1872 m, Wyoming) - 0.6
Chicoutimi (163 m, Quebec) - 0.0
Churchill Airport (29 m, Manitoba) - 0.1
Claresholm (1012 m, Alberta) - 0.3
Clayton Municipal Airpark (1515 m, New Mexico) - 0.1
Clearwater (438 m, British Columbia) - 2.4
Cleveland Hopkins Intl. Airport (245 m, Ohio) - 1.2
Clinton (1057 m, British Columbia) - 0.4
Clinton AP (1027 m, British Columbia) - 0.4
Clyde AP (27 m, Nunavut) - 0.8
Cobourg (78 m, Ontario) - 0.7
Cold Bay Airport (31 m, Alaska) - 1.0
Cold Lake Airport (541 m, Alberta) - 0.3
Collingwood (180 m, Ontario) - 0.5
Collins Bay (492 m, Saskatchewan) - 0.4
Columbia Metropolitan Airport (69 m, South Carolina) - 2.0
Columbia Regional Airport (274 m, Missouri) - 0.4
Colville Lake (259 m, Northwest Territories) - 1.6
Comox (26 m, British Columbia) - 1.1
Concord Airport (105 m, New Hampshire) - 1.7
Coral Harbour (238 m, Nunavut) - 0.6
Coral Harbour Airport (64 m, Nunavut) - 0.6
Corner Brook (152 m, Newfoundland) - 0.7
Coronach (756 m, Saskatchewan) - 0.7
Coronation (791 m, Alberta) - 0.8
Corpus Christi Intl. Airport (15 m, Texas) - 0.7
Cove Island (181 m, Ontario) - 0.3
Covington Airport (267 m, Kentucky) - 0.2
Craig (1915 m, Colorado) - 1.0
Cranbrook Airport (939 m, British Columbia) - 0.6
Cranbrook Airport (930 m, British Columbia) - 0.8
Creston Campbell Scientific (646 m, British Columbia) - 1.5
Croker Rvr (69 m, Northwest Territories) - 1.3
Cumshewa (17 m, British Columbia) - 1.4
Cypress Hills Park (1271 m, Saskatchewan) - 0.4
Cypress River (374 m, Manitoba) - 0.1
Dallas/Fort Worth Intl. Airport (182 m, Texas) - 0.3
Dane County Regional Airport (264 m, Wisconsin) - 0.7
Daniel's Harbour Airport (18 m, Newfoundland) - 1.6
Dauphin (305 m, Manitoba) - 0.1
Dauphin Airport (305 m, Manitoba) - 0.1
Dawson Creek Airport (655 m, British Columbia) - 1.0
Dawson Y. T. AP (370 m, Yukon) - 1.2
Dayton Intl. Airport (306 m, Ohio) - 0.0
Deadman Valley (283 m, Northwest Territories) - 2.1
Dease Lake (816 m, British Columbia) - 2.0
Dease Lake Airport (803 m, British Columbia) - 1.9
Debert (39 m, Nova Scotia) - 1.7
Deer Lake Airport (29 m, Newfoundland) - 1.4
Deerwood Rcs (341 m, Manitoba) - 0.4
Del Rio Airport (314 m, Texas) - 0.5
Delhi (232 m, Ontario) - 0.6
Deline (213 m, Northwest Territories) - 1.2
Denver Intl. Airport (1656 m, Colorado) - 0.1
Des Moines Intl. Airport (294 m, Iowa) - 0.3
Detroit Metropolitan Wayne County Airpo (202 m, Michigan) - 0.5
Dillingham Airport (29 m, Alaska) - 0.6
District (281 m, Ontario) - 0.3
Dodge City Regional Airport (790 m, Kansas) - 0.6
Dryden Airport (413 m, Ontario) - 1.1
Dubuque Regional Airport (329 m, Iowa) - 0.8
Duluth Airport (432 m, Minnesota) - 0.8
Ear Falls (355 m, Ontario) - 1.1
East Point (8 m, Prince Edward Island) - 0.8
Eastend Cypress (1080 m, Saskatchewan) - 0.4
Eastern Oregon Regional Airport (456 m, Oregon) - 0.7
Eastern Sierra Regional Airport (1263 m, California) - 1.3
Edmonton (IAP) (707 m, Alberta) - 0.2
Edmonton Municipal Cr10 (671 m, Alberta) - 0.1
Edmonton Namao (685 m, Alberta) - 0.1
Edson (925 m, Alberta) - 0.7
Edson (927 m, Alberta) - 0.6
Egbert CS (251 m, Ontario) - 0.5
Egg Island (215 m, Alberta) - 0.6
El Paso Intl. Airport (1194 m, Texas) - 0.1
Elbow (595 m, Saskatchewan) - 0.4
Elkins/Randolph Field AP (609 m, West-Virginia) - 0.8
Elora (376 m, Ontario) - 0.5
Ely Airport (1909 m, Nevada) - 0.7
Emerson (242 m, Manitoba) - 1.4
Entrance Isl. (5 m, British Columbia) - 0.9
Erie Intl. Airport (225 m, Pennsylvania) - 0.5
Erik Nielsen Whitehorse Intl. Airport (706 m, Yukon) - 2.4
Eskasoni (658 m, Nova Scotia) - 0.7
Estevan Airport (584 m, Saskatchewan) - 0.4
Estevan Point (7 m, British Columbia) - 0.3
Esther 1 (707 m, Alberta) - 1.2
Eugene Airport (114 m, Oregon) - 1.0
Eureka Airport (11 m, Nunavut) - 1.1
Evansville Airport (118 m, Indiana) - 0.1
Fairbanks Intl. Airport (135 m, Alaska) - 0.3
Falls Intl. Airport (362 m, Minnesota) - 0.4
Fanny Island (8 m, British Columbia) - 1.5
Faro Airport (716 m, Yukon) - 1.9
Ferolle Point (AUT) (6 m, Newfoundland) - 1.9
Fisher Branch (253 m, Manitoba) - 0.6
Flagstaff Airport (2131 m, Arizona) - 0.6
Flagstaff/Belemont (2181 m, Arizona) - 0.4
Flin Flon (304 m, Manitoba) - 1.0
Fort Chipewyan (238 m, Alberta) - 0.1
Fort Chipewyan (232 m, Alberta) - 0.0
Fort Good Hope (82 m, Northwest Territories) - 1.8
Fort Liard (213 m, Northwest Territories) - 1.5
Fort McMurray CS (369 m, Alberta) - 0.5
Fort Montmorency Rc RCS (673 m, Quebec) - 0.5
Fort Nelson Airport (389 m, British Columbia) - 1.3
Fort Providence (162 m, Northwest Territories) - 1.5
Fort Reliance (AUT) (168 m, Northwest Territories) - 0.8
Fort Ross (10 m, Nevada) - 0.8
Fort Simpson Airport (169 m, Northwest Territories) - 1.6
Fort Simpson Climate (168 m, Northwest Territories) - 1.7
Fort Smith (203 m, Northwest Territories) - 0.7
Fort Smith Airport (205 m, Northwest Territories) - 0.9
Fort Smith Regional Airport (141 m, Arkansas) - 0.9
Fort St. John AP (695 m, British Columbia) - 1.2
Fort Vermilion (289 m, Alberta) - 0.7
Fort Wayne Intl. Airport (252 m, Indiana) - 0.1
Fredericton (35 m, New Brunswick) - 1.7
Fredericton Intl. Airport (31 m, New Brunswick) - 1.7
Frelighsburg (152 m, Quebec) - 0.9
Fresno Yosemite Intl. Airport (100 m, California) - 0.0
Ft Severn (15 m, Ontario) - 1.2
Gagetown Awos A (51 m, New Brunswick) - 1.6
Gander Airport (151 m, Newfoundland) - 0.4
Gander Airport (151 m, Newfoundland) - 0.4
Gateshead (20 m, Nunavut) - 1.0
General Mitchell Intl. Airport (211 m, Wisconsin) - 1.3
George Bush Intercontinental Airport (33 m, Texas) - 0.8
Gerald R. Ford Intl. Airport (245 m, Michigan) - 0.9
Geraldton AP (349 m, Ontario) - 0.4
Gillam Airport (146 m, Manitoba) - 1.0
Gimli (230 m, Manitoba) - 0.8
Gjoa Haven Airport (46 m, Nunavut) - 1.0
Glasgow Airport (693 m, Montana) - 0.9
Goderich (214 m, Ontario) - 0.2
Goodland Airport (1124 m, Kansas) - 0.3
Goose (49 m, Newfoundland) - 0.0
Grand Junction Regional Airport (1472 m, Colorado) - 0.9
Grand Manan Sar CS (78 m, New Brunswick) - 1.5
Grand Rapids (223 m, Manitoba) - 0.4
Grande Prairie Airport (669 m, Alberta) - 0.8
Great Falls (1131 m, Montana) - 1.2
Greater Binghamton Airport (497 m, New York) - 0.4
Greater Rochester Intl. Airport (169 m, New York) - 0.7
Greater Sudbury (190 m, Ontario) - 0.2
Greenville- Spartanburg Intl. Airport (296 m, South Carolina) - 1.5
Greenwood (28 m, Nova Scotia) - 1.7
Gretna (253 m, Manitoba) - 1.5
Grey Islet (8 m, British Columbia) - 1.1
Gulkana Airport (481 m, Alaska) - 1.0
Haines Junction (595 m, Yukon) - 2.6
Halifax Airport (145 m, Nova Scotia) - 1.4
Hall Beach (8 m, Nunavut) - 0.4
Hamilton Airport (238 m, Ontario) - 0.4
Harrington Cda (53 m, Prince Edward Island) - 1.1
Harrow CDA (AUT) (192 m, Ontario) - 0.4
Hart Island (AUT) (8 m, Nova Scotia) - 0.8
Hat Isl. (36 m, Nunavut) - 1.0
Havre (792 m, Montana) - 1.0
Havre-Saint-Pierre (37 m, Quebec) - 0.9
Hay River (164 m, Northwest Territories) - 1.5
Hay River Airport (170 m, Northwest Territories) - 1.8
Hector Intl. Airport (274 m, North Dakota) - 1.0
Helena Regional Airport (1188 m, Montana) - 1.6
Hendrickson Creek (1448 m, Alberta) - 0.6
Herbert Isl. (17 m, British Columbia) - 0.9
Herschel Island (1 m, Yukon) - 0.8
High Level Airport (338 m, Alberta) - 0.8
Hilo Intl. Airport (10 m, Hawaii) - 0.9
Holman CS (30 m, Northwest Territories) - 1.6
Honolulu Intl. Airport (5 m, Hawaii) - 0.9
Hope (39 m, British Columbia) - 2.2
Hope Aerodrome (39 m, British Columbia) - 2.2
Huntsville Intl. Airport (196 m, Alabama) - 1.3
Huron Airport (393 m, South Dakota) - 0.1
Iliamna Airport (49 m, Alaska) - 0.4
Indian Head CDA (579 m, Saskatchewan) - 0.3
Indianapolis Intl. Airport (246 m, Indiana) - 0.3
Ingonish Beach CS (8 m, Nova Scotia) - 0.4
Inukjuak (25 m, Quebec) - 0.0
Inuvik Climate (103 m, Northwest Territories) - 1.0
Iqaluit (34 m, Nunavut) - 0.9
Isachsen (58 m, Nunavut) - 0.7
Island Falls (297 m, Saskatchewan) - 1.0
Island Lake Airport (235 m, Manitoba) - 0.9
Ivvavik National Park (244 m, Yukon) - 1.5
Jack Brooks Regional Airport (7 m, Texas) - 0.9
Jackson (91 m, Mississippi) - 1.2
Jacksonville Intl. Airport (11 m, Florida) - 1.0
Jasper Warden (1020 m, Alberta) - 0.9
Jimmy Lake (636 m, Saskatchewan) - 0.2
John F. Kennedy Intl. Airport (7 m, New York) - 1.5
Jonquière (128 m, Quebec) - 0.1
Junction Airport (522 m, Texas) - 0.8
Juneau Intl. Airport (7 m, Alaska) - 1.5
Kahului Airport (20 m, Hawaii) - 1.3
Kamloops (345 m, British Columbia) - 1.6
Kamloops Airport (345 m, British Columbia) - 1.6
Kansas City Intl. Airport (313 m, Missouri) - 0.1
Kapuskasing (227 m, Ontario) - 0.8
Kapuskasing (218 m, Ontario) - 0.7
Kejimkujik 1 (165 m, Nova Scotia) - 1.7
Kelowna Intl. Airport (456 m, British Columbia) - 1.2
Kelsey Dam CS (183 m, Manitoba) - 1.0
Kemptville (99 m, Ontario) - 0.7
Kenora Airport (406 m, Ontario) - 1.9
Kentville (49 m, Nova Scotia) - 1.7
Key Lake Airport (237 m, Saskatchewan) - 0.1
Key West Airport (5 m, Florida) - 0.9
Kindersley Regional Airport (698 m, Saskatchewan) - 0.7
King Salmon Airport (14 m, Alaska) - 0.7

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2016