{"id":69,"date":"2016-06-11T21:35:37","date_gmt":"2016-06-12T02:35:37","guid":{"rendered":"https:\/\/inside.nssl.noaa.gov\/facets\/?p=69"},"modified":"2016-06-12T13:33:43","modified_gmt":"2016-06-12T18:33:43","slug":"phi-out-west","status":"publish","type":"post","link":"https:\/\/inside.nssl.noaa.gov\/facets\/2016\/06\/phi-out-west\/","title":{"rendered":"PHI out west"},"content":{"rendered":"

As the final week of the PHI Prototype experiment wrapped up, the weather pattern become favorable for active severe weather over the northern Rockies\/Plains regions. \u00a0This enabled our project to center real time operations over parts of northern Idaho and Montana, focusing on the WFO Missoula area on Wednesday and the WFO Glasgow area on Thursday. Wednesday evening’s primary severe weather threat was large hail, and hence forecaster and the EM\/media groups focused on producing and using PHI for severe storms and lightning. \u00a0Along with using product streams like MRMS, a key tool PHI HWT forecasters utilize in analysis and producing PHI is CIMSS\u00a0ProbSevere<\/a>. \u00a0ProbSevere provides the initial probabilistic values for severe weather and lightning for storm objects – forecasters can then adjust the algorithm values when creating their PHI plumes.<\/p>\n

\"AWIPS
AWIPS 2 display of MRMS Maximum Estimated Hail Size swath overlaid with PHI plume forecasts of probability of severe thunderstorms, focused on a severe storm near Taft, MT.<\/figcaption><\/figure>\n

On Thursday evening, supercells moved across parts of central and eastern Montana producing damaging winds and large hail. \u00a0While conditions were not overly favorable for tornadoes, one particular supercell near Jordan, MT had a persistent wall cloud along with some reports of funnel clouds. \u00a0Along with monitoring the typical severe weather data, HWT forecasters also were able to see realtime video and pictures from storm chasers in the region. \u00a0This data was utilized to produce PHI for tornado potential, with most of the PHI objects giving information about lower probabilities than might typically be associated with tornado warning situations. \u00a0The forecaster and EM\/media groups then discussed how this probabilistic information might be utilized to help improve decision making and provision of severe weather information for the public.<\/p>\n

\"PHI
PHI plume for tornado probability for a supercell storm southeast of Jordan, MT. The text in the pop-up window is a potential text product based on NWS Hazard Simplification project prototypes. The yellow outlined box is the representation of a legacy severe thunderstorm warning derived from severe thunderstorm PHI data.<\/figcaption><\/figure>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

As the final week of the PHI Prototype experiment wrapped up, the weather pattern become favorable for active severe weather over the northern Rockies\/Plains regions. \u00a0This enabled our project to… <\/p>\n

Read more \u00bb<\/a><\/p>\n","protected":false},"author":68,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-69","post","type-post","status-publish","format-standard","hentry","category-news"],"_links":{"self":[{"href":"https:\/\/inside.nssl.noaa.gov\/facets\/wp-json\/wp\/v2\/posts\/69","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/inside.nssl.noaa.gov\/facets\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/inside.nssl.noaa.gov\/facets\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/inside.nssl.noaa.gov\/facets\/wp-json\/wp\/v2\/users\/68"}],"replies":[{"embeddable":true,"href":"https:\/\/inside.nssl.noaa.gov\/facets\/wp-json\/wp\/v2\/comments?post=69"}],"version-history":[{"count":3,"href":"https:\/\/inside.nssl.noaa.gov\/facets\/wp-json\/wp\/v2\/posts\/69\/revisions"}],"predecessor-version":[{"id":74,"href":"https:\/\/inside.nssl.noaa.gov\/facets\/wp-json\/wp\/v2\/posts\/69\/revisions\/74"}],"wp:attachment":[{"href":"https:\/\/inside.nssl.noaa.gov\/facets\/wp-json\/wp\/v2\/media?parent=69"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/inside.nssl.noaa.gov\/facets\/wp-json\/wp\/v2\/categories?post=69"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/inside.nssl.noaa.gov\/facets\/wp-json\/wp\/v2\/tags?post=69"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}