{"id":9861,"date":"2025-07-20T15:20:29","date_gmt":"2025-07-20T07:20:29","guid":{"rendered":"https:\/\/tommykwan.com\/blog\/?p=9861"},"modified":"2025-07-20T20:23:29","modified_gmt":"2025-07-20T12:23:29","slug":"dew-point-dew-point-spread","status":"publish","type":"post","link":"https:\/\/tommykwan.com\/blog\/aviation\/dew-point-dew-point-spread\/","title":{"rendered":"Dew point, Dew Point Spread"},"content":{"rendered":"<h3>What&#8217;s Dew Point?<\/h3>\n<p>Dew point, given in degrees, is the <strong>temperature at which the air can hold no more moisture.<\/strong> When the temperature of the air is reduced to the dew point, the air is completely saturated and moisture begins to condense out of the air in the form of fog, dew, frost, clouds, rain, or snow.<\/p>\n<ul>\n<li>High Dew Point -&gt; warmer air, high water content, less dense air -&gt; more uncomfortable<\/li>\n<li>Air can has same relative humidity, but different dew point<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<p><a href=\"https:\/\/youtu.be\/gLmYP18-Fhg?si=6kL63Wsn6vQ72CNJ\">https:\/\/youtu.be\/gLmYP18-Fhg?si=6kL63Wsn6vQ72CNJ<\/a><\/p>\n<div class=\"embed-container\"><iframe loading=\"lazy\" title=\"Weather 101: Humidity VS Dewpoint\" width=\"1170\" height=\"658\" src=\"https:\/\/www.youtube.com\/embed\/gLmYP18-Fhg?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/div>\n<h3><\/h3>\n<h3>Dew Point Spread<\/h3>\n<p>The dew point spread, also known as <strong>dew point depression<\/strong>, is the<strong> difference between the air temperature and the dew point temperature.<\/strong> A smaller dew point spread indicates higher humidity, while a larger spread suggests drier air. When the dew point spread is small, especially less than 2\u00b0C\u00a0 to 3\u00b0C, fog is more likely to form as the air is nearly saturated.<\/p>\n<p><a href=\"https:\/\/youtu.be\/Ysf3dfVPZk4?si=JqI24UjqHDfgHRqK\">https:\/\/youtu.be\/Ysf3dfVPZk4?si=JqI24UjqHDfgHRqK<\/a><\/p>\n<div class=\"embed-container\"><iframe loading=\"lazy\" title=\"Aviation Weather-Temperature Dewpoint Spread Why does it matter when flying helicopters or aircraft?\" width=\"1170\" height=\"658\" src=\"https:\/\/www.youtube.com\/embed\/Ysf3dfVPZk4?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/div>\n<p><a href=\"https:\/\/youtu.be\/KHSJZmPMQiU?si=zg3CdoU5XagqzXUY\">https:\/\/youtu.be\/KHSJZmPMQiU?si=zg3CdoU5XagqzXUY<\/a><\/p>\n<div class=\"embed-container\"><iframe loading=\"lazy\" title=\"Temperature\/Dew Point Spread | Water Vapor in the Atmosphere | Lowest Condensation Level\" width=\"1170\" height=\"658\" src=\"https:\/\/www.youtube.com\/embed\/KHSJZmPMQiU?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/div>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<h3>Application of Dew Point (DP)?<\/h3>\n<div class=\"embed-container\">\n<blockquote class=\"wp-embedded-content\" data-secret=\"vLXmDMXfFn\"><p><a href=\"https:\/\/tommykwan.com\/blog\/aviation\/how-to-find-the-dew-point-how-to-find-relative-humidity-rh\/\">How to find the Dew Point? How to find Relative Humidity (RH)?<\/a><\/p><\/blockquote>\n<p><iframe loading=\"lazy\" class=\"wp-embedded-content\" sandbox=\"allow-scripts\" security=\"restricted\" style=\"position: absolute; clip: rect(1px, 1px, 1px, 1px);\" title=\"&#8220;How to find the Dew Point? How to find Relative Humidity (RH)?&#8221; &#8212; Tommy&#039;s Diaries\" src=\"https:\/\/tommykwan.com\/blog\/aviation\/how-to-find-the-dew-point-how-to-find-relative-humidity-rh\/embed\/#?secret=elVi8W0LhO#?secret=vLXmDMXfFn\" data-secret=\"vLXmDMXfFn\" width=\"600\" height=\"338\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\"><\/iframe><\/div>\n<div class=\"embed-container\">\n<blockquote class=\"wp-embedded-content\" data-secret=\"S0ktdvFYjV\"><p><a href=\"https:\/\/tommykwan.com\/blog\/aviation\/dew-point-application-calculate-cloud-base\/\">Dew Point Application &#8211; Calculate Cloud Base<\/a><\/p><\/blockquote>\n<p><iframe loading=\"lazy\" class=\"wp-embedded-content\" sandbox=\"allow-scripts\" security=\"restricted\" style=\"position: absolute; clip: rect(1px, 1px, 1px, 1px);\" title=\"&#8220;Dew Point Application &#8211; Calculate Cloud Base&#8221; &#8212; Tommy&#039;s Diaries\" src=\"https:\/\/tommykwan.com\/blog\/aviation\/dew-point-application-calculate-cloud-base\/embed\/#?secret=8lLXDRJzsh#?secret=S0ktdvFYjV\" data-secret=\"S0ktdvFYjV\" width=\"600\" height=\"338\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\"><\/iframe><\/div>\n<div class=\"embed-container\">\n<blockquote class=\"wp-embedded-content\" data-secret=\"XFnEvvns6d\"><p><a href=\"https:\/\/tommykwan.com\/blog\/aviation\/calculation-of-freezing-height\/\">Calculation of Freezing Height<\/a><\/p><\/blockquote>\n<p><iframe loading=\"lazy\" class=\"wp-embedded-content\" sandbox=\"allow-scripts\" security=\"restricted\" style=\"position: absolute; clip: rect(1px, 1px, 1px, 1px);\" title=\"&#8220;Calculation of Freezing Height&#8221; &#8212; Tommy&#039;s Diaries\" src=\"https:\/\/tommykwan.com\/blog\/aviation\/calculation-of-freezing-height\/embed\/#?secret=3d2LYimrYH#?secret=XFnEvvns6d\" data-secret=\"XFnEvvns6d\" width=\"600\" height=\"338\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\"><\/iframe><\/div>\n","protected":false},"excerpt":{"rendered":"<p>What&#8217;s Dew Point? Dew point, given in degrees, is the temperature at which the air can hold no more moisture. When the temperature of the air is reduced to the dew point, the air is completely saturated and moisture begins to condense out of the air in the form of fog, dew, frost, clouds, rain,<a class=\"read-more \" href=\"https:\/\/tommykwan.com\/blog\/aviation\/dew-point-dew-point-spread\/\" title=\"Read More\"> <span class=\"button default\">Read More<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[64,72],"tags":[],"class_list":["post-9861","post","type-post","status-publish","format-standard","hentry","category-aviation","category-meteorology"],"_links":{"self":[{"href":"https:\/\/tommykwan.com\/blog\/wp-json\/wp\/v2\/posts\/9861","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/tommykwan.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/tommykwan.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/tommykwan.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/tommykwan.com\/blog\/wp-json\/wp\/v2\/comments?post=9861"}],"version-history":[{"count":15,"href":"https:\/\/tommykwan.com\/blog\/wp-json\/wp\/v2\/posts\/9861\/revisions"}],"predecessor-version":[{"id":9900,"href":"https:\/\/tommykwan.com\/blog\/wp-json\/wp\/v2\/posts\/9861\/revisions\/9900"}],"wp:attachment":[{"href":"https:\/\/tommykwan.com\/blog\/wp-json\/wp\/v2\/media?parent=9861"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/tommykwan.com\/blog\/wp-json\/wp\/v2\/categories?post=9861"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/tommykwan.com\/blog\/wp-json\/wp\/v2\/tags?post=9861"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}