| estações: 2532
|
nebulosidade |
base |
| Puvirnituq (23 m, Quebec) |
6 |
|
| McGhee Tyson Airport (299 m, Tennessee) |
4 |
|
| Calhoun County Airport (9 m, Texas) |
0 |
|
| Revelstoke Airport (443 m, Colúmbia Britânica) |
8 |
|
| Decorah Aeroporto (353 m, Iowa) |
8 |
|
| Arthur N. Neu Airport (375 m, Iowa) |
4 |
|
| Charlottetown Aeroporto (79 m, Ilhas do Príncipe Eduardo) |
6 |
|
| Victoria Int. Airport (19 m, Colúmbia Britânica) |
6 |
|
| Charlottesville- Albemarle Airport (195 m, Virgínia) |
0 |
|
| McGuire AFB (41 m, Nova Jersey) |
0 |
|
| Keokuk Municipal Airport (205 m, Iowa) |
0 |
|
| Michel-Pouliot Gaspé Airport (35 m, Quebec) |
6 |
|
| Ephrata Municipal Airport (383 m, Washington) |
8 |
|
| Atlantic Municipal Airport (360 m, Iowa) |
0 |
|
| Grant County Regional Airport (1127 m, Oregon) |
8 |
|
| Eastern Iowa Airport (256 m, Iowa) |
4 |
|
| Fort Smith Airport (205 m, Territórios do Noroeste) |
6 |
|
| Rickenbacker Intl. Airport (227 m, Ohio) |
4 |
|
| Waterloo Regional Airport (268 m, Iowa) |
8 |
|
| Ashland Aeroporto (166 m, Kentucky) |
8 |
|
| Kokomo Municipal Airport (253 m, Indiana) |
0 |
|
| Shelbyville Municipal Airport (245 m, Indiana) |
2 |
|
| Reno Stead Airport (1539 m, Nevada) |
0 |
|
| Walker Aeroporto (411 m, Minnesota) |
0 |
|
| Winnemucca Aeroporto (1322 m, Nevada) |
8 |
|
| Delaware (286 m, Indiana) |
4 |
|
| Evansville Aeroporto (118 m, Indiana) |
0 |
|
| Logan County Airport (178 m, Illinois) |
6 |
|
| Pittsfield (216 m, Illinois) |
4 |
|
| Havre-Saint-Pierre (34 m, Quebec) |
2 |
|
| Aurora Municipal Airport (215 m, Illinois) |
0 |
|
| Rock Falls Aeroporto (197 m, Illinois) |
4 |
|
| Moosonee Aeroporto (9 m, Quebec) |
8 |
|
| Reno (1341 m, Nevada) |
2 |
|
| Salem-Leckrone (174 m, Illinois) |
0 |
|
| Southern Illinois Airport (125 m, Illinois) |
0 |
|
| Aeroporto Internacional Midway (190 m, Illinois) |
8 |
|
| Savanna Aeroporto (188 m, Illinois) |
4 |
|
| Rochelle Municipal Airport (238 m, Illinois) |
4 |
|
| Wahoo Municipal Airport (373 m, Nebraska) |
0 |
|
| Winchester Regional Airport (222 m, Virgínia) |
0 |
|
| Fort St. John Airport (695 m, Colúmbia Britânica) |
6 |
|
| Carmi Aeroporto (118 m, Illinois) |
0 |
|
| Cairo Aeroporto (98 m, Illinois) |
6 |
|
| Robert R Wells Jr (74 m, Texas) |
0 |
|
| University of Illinois Willard Airport (230 m, Illinois) |
2 |
|
| Hebron Aeroporto (447 m, Nebraska) |
0 |
|
| Veterans Airport of Southern Illinois (144 m, Illinois) |
0 |
|
| Aeroporto Municipal de Renton (9 m, Washington) |
8 |
|
| Tacoma Narrows Airport (89 m, Washington) |
8 |
|
| Challis Aeroporto (1546 m, Idaho) |
8 |
|
| McCall Municipal Airport (1530 m, Idaho) |
0 |
|
| Mirabel Aeroporto (82 m, Quebec) |
6 |
|
| Arlington Aeroporto (42 m, Washington) |
8 |
|
| Gray Army Airfield (89 m, Washington) |
8 |
|
| Lemhi (1233 m, Idaho) |
8 |
|
| Washington Aeroporto (197 m, Geórgia) |
0 |
|
| Toccoa Airport (304 m, Geórgia) |
0 |
|
| Thomson Aeroporto (152 m, Geórgia) |
0 |
|
| La Ronge Aeroporto (379 m, Saskatchewan) |
8 |
|
| Hazlehurst Aeroporto (78 m, Geórgia) |
0 |
|
| Fitzgerald Aeroporto (111 m, Geórgia) |
0 |
|
| W. H. 'Bud' Barron Airport (94 m, Geórgia) |
0 |
|
| Crisp County (95 m, Geórgia) |
0 |
|
| Claxton Aeroporto (34 m, Geórgia) |
0 |
|
| Cherokee County Regional Airport (372 m, Geórgia) |
0 |
|
| Blakely Aeroporto (65 m, Geórgia) |
0 |
|
| Statesboro- Bulloch County Airport (57 m, Geórgia) |
0 |
|
| Springbank (1201 m, Alberta) |
2 |
|
| Minot Air Force Base (497 m, Dakota do Norte) |
8 |
|
| Coast Guard Air Station Port Angeles (4 m, Washington) |
8 |
|
| Waycross (46 m, Geórgia) |
0 |
|
| Base aérea Robins (90 m, Geórgia) |
0 |
|
| Andrews Aeroporto (967 m, Texas) |
0 |
|
| Dobbins Air Reserve Base (326 m, Geórgia) |
2 |
|
| Base aérea Malmstrom (1056 m, Montana) |
2 |
|
| Condado de Maury Aeroporto (208 m, Tennessee) |
0 |
|
| Tri-State Airport (255 m, Virgínia Ocidental) |
6 |
|
| Lakeland Linder Intl. Airport (1 m, Flórida) |
4 |
|
| Metropolis Municipal Airport (117 m, Illinois) |
8 |
|
| Morris Aeroporto (178 m, Illinois) |
6 |
|
| Tampa Executive Airport (7 m, Flórida) |
0 |
|
| Buckhannon Aeroporto (498 m, Virgínia Ocidental) |
4 |
|
| L. M. Clayton Airport (605 m, Montana) |
0 |
|
| Hettinger Municipal Airport (824 m, Dakota do Norte) |
2 |
|
| Aeroporto Internacional de Birmingham-S (192 m, Alabama) |
4 |
|
| Aeroporto Internacional de Jacksonville (11 m, Flórida) |
6 |
|
| Groton (3 m, Connecticut) |
0 |
|
| Aeroporto Memorial Sikorsky (5 m, Connecticut) |
0 |
|
| Dillon Aeroporto (1597 m, Montana) |
8 |
|
| Nucla (1811 m, Colorado) |
0 |
|
| Havre (792 m, Montana) |
0 |
|
| Buena Vista Aeroporto (2422 m, Colorado) |
8 |
|
| Boulder Municipal Airport (1612 m, Colorado) |
0 |
|
| Pryor Field Regional Airport (180 m, Alabama) |
6 |
|
| Meeker (1948 m, Colorado) |
0 |
|
| Skyhaven Airport (243 m, Missouri) |
0 |
|
| Jim Hamilton (59 m, Carolina do Sul) |
0 |
|
| Abingdon (631 m, Virgínia) |
8 |
|
| Dare County Gunnery Range (3 m, Carolina do Norte) |
0 |
|
| Lamoni (342 m, Iowa) |
0 |
|
| São Pedro (24 m, Saint-Pierre e Miquelon) |
7 |
>2500m |
| Fairfield Municipal Airport (244 m, Iowa) |
2 |
|
| Zanesville Municipal Airport (274 m, Ohio) |
0 |
|
| Pickle Lake(Man) (386 m, Ontário) |
0 |
|
| Atoka (180 m, Oklahoma) |
8 |
|
| Lowe Army Heliport (74 m, Alabama) |
0 |
|
| London Madison County Airport (330 m, Ohio) |
6 |
|
| Havre-Saint-Pierre (37 m, Quebec) |
2 |
|
| Sedalia Regional Airport (277 m, Missouri) |
0 |
|
| Colorado Springs Airport (1881 m, Colorado) |
4 |
|
| Pueblo Memorial Airport (1439 m, Colorado) |
0 |
|
| Little Rock Air Force Base (103 m, Arkansas) |
4 |
|
| Graham Aeroporto (342 m, Texas) |
4 |
|
| Fulton County Airport (269 m, Nova Iorque) |
0 |
|
| George M. Bryan Airport (101 m, Mississippi) |
8 |
|
| Lonesome Pine Airport (817 m, Virgínia) |
8 |
|
| Willoughby (191 m, Ohio) |
4 |
|
| Batesville Aeroporto (141 m, Arkansas) |
0 |
|
| Marion (350 m, Arkansas) |
0 |
|
| McComb- Pike County Airport (126 m, Mississippi) |
4 |
|
| Safford Regional Airport (950 m, Arizona) |
0 |
|
| Drake Field (381 m, Arkansas) |
0 |
|
| Monticello Municipal Airport (36 m, Arkansas) |
0 |
|
| Tillamook Airport (11 m, Oregon) |
6 |
|
| Bridgeport Municipal Airport (260 m, Texas) |
6 |
|
| Grider Field (63 m, Arkansas) |
4 |
|
| Glencoe Aeroporto (302 m, Minnesota) |
4 |
|
| Jonesboro Municipal Airport (80 m, Arkansas) |
0 |
|
| Covington Aeroporto (247 m, Geórgia) |
0 |
|
| Fillmore County Airport (389 m, Minnesota) |
8 |
|
| Lancaster Regional Airport (153 m, Texas) |
8 |
|
| Shelby Aeroporto (258 m, Carolina do Norte) |
0 |
|
| Crystal Airport (265 m, Minnesota) |
0 |
|
| Sugar Land Regional Airport (25 m, Texas) |
0 |
|
| Pearland Regional Airport (13 m, Texas) |
2 |
|
| Ellington Field Joint Reserve Base (10 m, Texas) |
6 |
|
| Austin Municipal Airport (375 m, Minnesota) |
6 |
|
| Darke County Airport (307 m, Ohio) |
6 |
|
| Stephenville Intl. Airport (9 m, Terra Nova) |
2 |
|
| Cambridge Aeroporto (287 m, Minnesota) |
8 |
|
| Longville Municipal Airport (407 m, Minnesota) |
0 |
|
| Mc Gregor (180 m, Texas) |
8 |
|
| Winkler Aeroporto (855 m, Texas) |
0 |
|
| Taylor (448 m, Wisconsin) |
8 |
|
| Grand Rapids (413 m, Minnesota) |
0 |
|
| Two Harbors (328 m, Minnesota) |
0 |
|
| Marfa Municipal Airport (1473 m, Texas) |
0 |
|
| Canadian Aeroporto (730 m, Texas) |
8 |
|
| Albert Lea Municipal Airport (383 m, Minnesota) |
4 |
|
| St. Paul Downtown Airport (219 m, Minnesota) |
0 |
|
| Hutchinson Municipal Airport (323 m, Minnesota) |
0 |
|
| Cook Muni Arpt (402 m, Minnesota) |
0 |
|
| La Grange (99 m, Texas) |
0 |
|
| Huntsville Regional Airport (111 m, Texas) |
8 |
|
| Aeroporto Internacional de Minneapolis- (255 m, Minnesota) |
2 |
|
| Western Carolina Regional Airport (517 m, Carolina do Norte) |
6 |
|
| Mackinac Island Airport (226 m, Michigan) |
6 |
|
| Harbor Springs Municipal Airport (209 m, Michigan) |
8 |
|
| Fremont Municipal Airport (235 m, Michigan) |
0 |
|
| Pellston Regional Airport (217 m, Michigan) |
8 |
|
| Sault Ste. Marie Municipal Airport (218 m, Michigan) |
0 |
|
| Grove Municipal Airport (254 m, Oklahoma) |
0 |
|
| Manistee (189 m, Michigan) |
4 |
|
| Bad Axe (234 m, Michigan) |
0 |
|
| West Michigan Regional Airport (210 m, Michigan) |
4 |
|
| Coleman A. Young Intl. Airport (191 m, Michigan) |
0 |
|
| Provincetown Aeroporto (2 m, Massachusetts) |
0 |
|
| Duplin (42 m, Carolina do Norte) |
0 |
|
| Aurora State Airport (60 m, Oregon) |
8 |
|
| Martha's Vineyard Airport (21 m, Massachusetts) |
0 |
|
| Donaldson Center Airport (291 m, Carolina do Sul) |
0 |
|
| Northern Aroostook Regional Airport (301 m, Maine) |
0 |
|
| Auburn/Lewiston Municipal Airport (88 m, Maine) |
0 |
|
| Caribou Aeroporto (191 m, Maine) |
0 |
|
| Allen Parish Airport (33 m, Luisiana) |
8 |
|
| Hartsville Regional Airport (111 m, Carolina do Sul) |
6 |
|
| False River Regional Airport (12 m, Luisiana) |
0 |
|
| Gage Airport (667 m, Oklahoma) |
0 |
|
| Thomas P. Stafford Airport (489 m, Oklahoma) |
0 |
|
| Bogalusa (36 m, Luisiana) |
4 |
|
| Bastrop Aeroporto (51 m, Luisiana) |
6 |
|
| Laurens County Airport (212 m, Carolina do Sul) |
0 |
|
| Hammond Northshore Regional Airport (13 m, Luisiana) |
0 |
|
| Monroe Regional Airport (24 m, Luisiana) |
6 |
|
| Lafayette Regional Airport (13 m, Luisiana) |
0 |
|
| Harnett Regional Jetport Airport (60 m, Carolina do Norte) |
0 |
|
| Charlotte- Monroe Executive Airport (207 m, Carolina do Norte) |
0 |
|
| Michael J. Smith Field (3 m, Carolina do Norte) |
0 |
|
| Lake Havasu City Aeroporto (238 m, Arizona) |
0 |
|
| Baton Rouge Metropolitan Airport (21 m, Luisiana) |
0 |
|
| Marana Regional Airport (619 m, Arizona) |
0 |
|
| Aeroporto do Nordeste de Filadél (37 m, Pensilvânia) |
0 |
|
| Middlesborough Aeroporto (352 m, Kentucky) |
6 |
|
| Portland- Troutdale Airport (11 m, Oregon) |
8 |
|
| London-Corbin Airport (362 m, Kentucky) |
0 |
|
| Colonel James Jabara Airport (433 m, Kansas) |
0 |
|
| Cheyenne Regional Airport (1872 m, Wyoming) |
0 |
|
| Yellowstone Regional Airport (1553 m, Wyoming) |
2 |
|
| Summerville Aeroporto (17 m, Carolina do Sul) |
4 |
|
| Rawlins Municipal Airport (2077 m, Wyoming) |
0 |
|
| Altoona (458 m, Pensilvânia) |
0 |
|
| Union County Airport (311 m, Ohio) |
4 |
|
| Susanville Municipal Airport (1263 m, Califórnia) |
0 |
|
| Sacramento McClellan Airport (23 m, Califórnia) |
0 |
|
| Pickle Lake Airport (391 m, Ontário) |
0 |
|
| Solon Springs Muni (336 m, Wisconsin) |
8 |
|
| Sioux Lookout Airport (390 m, Ontário) |
2 |
|
| San Bernardino Intl. Airport (353 m, Califórnia) |
8 |
|
| Greenville- Spartanburg Intl. Airport (296 m, Carolina do Sul) |
0 |
|
| Ralph Wenz Field (2160 m, Wyoming) |
8 |
|
| Burlington Intl. Airport (104 m, Vermont) |
6 |
|
| Madera Municipal Airport (77 m, Califórnia) |
0 |
|
| Ramona Aeroporto (424 m, Califórnia) |
2 |
|
| Alturas Aeroporto (1341 m, Califórnia) |
6 |
|
| Vernal Regional Airport (1608 m, Utah) |
4 |
|
| Nut Tree Airport (34 m, Califórnia) |
0 |
|
| Wiarton Airport (223 m, Ontário) |
6 |
|
| Windsor Aeroporto (190 m, Ontário) |
6 |
|
| Muskrat Dam Airport (278 m, Ontário) |
0 |
|
| Marine Corps Air Station Miramar (134 m, Califórnia) |
0 |
|
| Chesterfield County Airport (72 m, Virgínia) |
0 |
|
| Greater Sudbury (190 m, Ontário) |
8 |
|
| Price/Carbon (1799 m, Utah) |
8 |
|
| Logan-Cache Airport (1358 m, Utah) |
8 |
|
| Orange County Airport (111 m, Nova Iorque) |
0 |
|
| Montgomery-Gibbs Executive Airport (129 m, Califórnia) |
0 |
|
| Salinas Municipal Airport (26 m, Califórnia) |
0 |
|
| North Bay (370 m, Ontário) |
6 |
|
| Wawa (287 m, Ontário) |
8 |
|
| Front Royal-warren County (216 m, Virgínia) |
0 |
|
| Toronto Islands Aeroporto (77 m, Ontário) |
0 |
|
| Palmdale Regional Airport (774 m, Califórnia) |
0 |
|
| Greater Binghamton Airport (497 m, Nova Iorque) |
0 |
|
| New Orleans Downtown (9 m, Luisiana) |
2 |
|
| Double Eagle II Airport (1779 m, Novo México) |
4 |
|
| Derby Field (1190 m, Califórnia) |
2 |
|
| Livermore Municipal Airport (121 m, Califórnia) |
0 |
|
| Williams Lake Airport (942 m, Colúmbia Britânica) |
6 |
|
| Buchanan Field Airport (7 m, Califórnia) |
0 |
|
| Chino Airport (199 m, Califórnia) |
8 |
|
| Santa Maria Public Airport (73 m, Califórnia) |
0 |
|
| Holloman AFB (1248 m, Novo México) |
2 |
|
| Aeroporto Internacional de São F (5 m, Califórnia) |
0 |
|
| Deming Municipal Airport (1313 m, Novo México) |
0 |
|
| Meadows Field Airport (150 m, Califórnia) |
0 |
|
| Wharton Regional Airport (31 m, Texas) |
0 |
|
| Madison Aeroporto (250 m, Indiana) |
4 |
|
| Moosonee (9 m, Ontário) |
8 |
|
| Seminole Aeroporto (1010 m, Texas) |
0 |
|
| Yakima Aeroporto (325 m, Washington) |
8 |
|
| Ionia Aeroporto (249 m, Michigan) |
0 |
|
| Perry Municipal Airport (309 m, Iowa) |
0 |
|
| Saglek Bay Airport (483 m, Terra Nova) |
6 |
|
| Saglek Bay (501 m, Califórnia) |
6 |
|
| Brevoort Island Airport (376 m, Nunavut) |
4 |
|
| Saguache (2385 m, Colorado) |
0 |
|
| Scappoose Industrial Airpark Airport (16 m, Oregon) |
8 |
|
| Instalação de Voo Wallops (12 m, Virgínia) |
0 |
|
| McMinnville Municipal Airport (159 m, Oregon) |
8 |
|
| Roanoke Aeroporto (358 m, Virgínia) |
0 |
|
| La Grande/Union County Airport (826 m, Oregon) |
8 |
|
| Meacham (1134 m, Oregon) |
2 |
|
| Roseburg Regional Airport (160 m, Oregon) |
2 |
|
| Newport Municipal Airport (37 m, Oregon) |
6 |
|
| Hillsboro Airport (62 m, Oregon) |
8 |
|
| Brookings Aeroporto (140 m, Oregon) |
0 |
|
| Lehigh Valley Intl. Airport (117 m, Pensilvânia) |
0 |
|
| Aeroporto Internacional de Richmond (54 m, Virgínia) |
2 |
|
| Aeroporto Internacional de Pittsburgh (373 m, Pensilvânia) |
4 |
|
| Griffin Aeroporto (292 m, Geórgia) |
0 |
|
| Williamsport Regional Airport (160 m, Pensilvânia) |
8 |
|
| Capital City Airport (106 m, Pensilvânia) |
0 |
|
| Bradford Aeroporto (653 m, Pensilvânia) |
0 |
|
| Pittsburgh-Butler Regional Airport (380 m, Pensilvânia) |
0 |
|
| DuBois Aeroporto (554 m, Pensilvânia) |
0 |
|
| Venango Regional Airport (469 m, Pensilvânia) |
0 |
|
| Indiana (429 m, Pensilvânia) |
0 |
|
| Lancaster Aeroporto (123 m, Pensilvânia) |
0 |
|
| Arnold Palmer Regional Airport (361 m, Pensilvânia) |
0 |
|
| Muir Army Airfield (149 m, Pensilvânia) |
2 |
|
| Reading Regional Airport (105 m, Pensilvânia) |
0 |
|
| University Park Airport (378 m, Pensilvânia) |
0 |
|
| Washington (361 m, Pensilvânia) |
0 |
|
| Port Meadville Airport (427 m, Pensilvânia) |
0 |
|
| Penn Valley Airport (137 m, Pensilvânia) |
8 |
|
| Heritage Field Airport (89 m, Pensilvânia) |
0 |
|
| Doylestown Airport (120 m, Pensilvânia) |
0 |
|
| York Airport (144 m, Pensilvânia) |
0 |
|
| Aeroporto internacional de Norfolk (9 m, Virgínia) |
2 |
|
| Wings Field (92 m, Pensilvânia) |
0 |
|
| Allentown Queen City Municipal Airport (122 m, Pensilvânia) |
0 |
|
| New Castle Municipal Airport (327 m, Pensilvânia) |
0 |
|
| Quakertown Airport (160 m, Pensilvânia) |
0 |
|
| Aeroporto Internacional Rhode (19 m, Rhode Island) |
2 |
|
| North Central State Airport (134 m, Rhode Island) |
0 |
|
| Newport State Airport (52 m, Rhode Island) |
0 |
|
| Westerly State Airport (25 m, Rhode Island) |
0 |
|
| Aeroporto Metropolitano de Colúm (69 m, Carolina do Sul) |
0 |
|
| Caledonia County Airport (362 m, Vermont) |
0 |
|
| Rock Hill/York (204 m, Carolina do Sul) |
0 |
|
| William H. Morse State Airport (252 m, Vermont) |
0 |
|
| Greenwood (192 m, Carolina do Sul) |
0 |
|
| Aiken Regional Airport (161 m, Carolina do Sul) |
0 |
|
| Morrisville- Stowe State Airport (223 m, Vermont) |
6 |
|
| Woodward Field (92 m, Carolina do Sul) |
2 |
|
| Chester Catawba Regional Airport (200 m, Carolina do Sul) |
0 |
|
| Kingstree Aeroporto (20 m, Carolina do Sul) |
0 |
|
| Lancaster County Airport (148 m, Carolina do Sul) |
2 |
|
| Mount Pleasant Regional Airport (4 m, Carolina do Sul) |
6 |
|
| Pickens County Airport (309 m, Carolina do Sul) |
0 |
|
| Spartanburg Downtown Memorial Airport (246 m, Carolina do Sul) |
0 |
|
| Sumter Aeroporto (56 m, Carolina do Sul) |
0 |
|
| Bathurst Arpt(Awrs) (59 m, Nova Brunswick) |
8 |
|
| Edward F. Knapp State Airport (355 m, Vermont) |
4 |
|
| Avenger Field (725 m, Texas) |
0 |
|
| Chattanooga Metropolitan Airport (210 m, Tennessee) |
4 |
|
| Oak Ridge (277 m, Tennessee) |
8 |
|
| Tri-Cities Regional Airport (457 m, Tennessee) |
2 |
|
| Millington-Memphis Airport (98 m, Tennessee) |
4 |
|
| Sandersville Aeroporto (134 m, Geórgia) |
0 |
|
| Pecos Municipal Airport (796 m, Texas) |
6 |
|
| Mount Pleasant Aeroporto (111 m, Texas) |
8 |
|
| Harrison County Airport (109 m, Texas) |
8 |
|
| Hebbronville Aeroporto (202 m, Texas) |
8 |
|
| Aeroporto William P. Hobby (14 m, Texas) |
6 |
|
| Texas Gulf Coast Regional Airport (8 m, Texas) |
0 |
|
| Dalhart Municipal Airport (1216 m, Texas) |
8 |
|
| Houston County Airport (106 m, Texas) |
6 |
|
| Beeville Aeroporto (82 m, Texas) |
0 |
|
| Bay City Municipal Airport (14 m, Texas) |
6 |
|
| Houston Southwest Airport (21 m, Texas) |
0 |
|
| Hutchinson (931 m, Texas) |
8 |
|
| Skylark Field (258 m, Texas) |
6 |
|
| Gainesville Municipal Airport (256 m, Texas) |
8 |
|
| Suwannee County Airport (32 m, Flórida) |
8 |
|
| Weaverville (716 m, Califórnia) |
0 |
|
norte - sul