JakkelWx Posted July 16, 2019 Share Posted July 16, 2019 Let's see if I can make a run at an 80 degree low or higher Sat and Sun. That would be a big achievement for the heavily rural area here. Something I haven't seen since August 13, 2016. Link to comment Share on other sites More sharing options...
yoda Posted July 16, 2019 Share Posted July 16, 2019 Well that was interesting... poured for about three minutes just now... checked radar, saw nothing... zoomed in and there is a tiny shower right over me that popped up... another one is right over La Plata 1 Link to comment Share on other sites More sharing options...
JakkelWx Posted July 16, 2019 Share Posted July 16, 2019 85/77. Way soupier than yesterday at this time. Link to comment Share on other sites More sharing options...
yoda Posted July 16, 2019 Share Posted July 16, 2019 From the morning HWO for the areas along the I95 corridor (metro areas) and into SE MD: Quote Heat indices around 105 degrees are possible Wednesday and Thursday during the afternoon and early evening hours. Increasing heat and tropical moisture may result in thunderstorms capable of producing a few damaging wind gusts or isolated instances of flooding Wednesday and Thursday. Dangerous heat and humidity are likely Friday through Sunday across the entire area. Heat indices of 110 to 115 degrees are possible during the afternoon and evening hours each day, and heat indices may hold in the 80s and 90s at night. If the prolonged heat and humidity is realized, it will become a significant threat to anyone exposed to the heat for an extended period of time. Link to comment Share on other sites More sharing options...
yoda Posted July 16, 2019 Share Posted July 16, 2019 Updated morning AFD from LWX mentions perhaps a few days over 100 degrees as well .LONG TERM /FRIDAY THROUGH MONDAY/... Dangerous heat is becoming increasingly likely Friday through this weekend. 850/925 hPa temps of 25/30 C respectively are expected Friday through the weekend. Full mixing would result in surface temperatures exceeding 100 degrees F. Given uncertainties in just how much we mix, not willing to go quite that high this far out in the forecast, but the potential is there for multiple days near or exceeding 100. This combined with high humidity will likely result in dangerous heat, with heat index values of 105 to 115 well within the realm of possibility. Given the fact that high heat and humidity will likely occur for multiple days in a row, this compounds the danger of excessive heat. Please visit www.weather.gov/safety/heat for tips to beat the heat. A rather strong trough and associated surface cold front approaches early next week, and when it collides with the heat and humidity in place, it seems possible that strong thunderstorms may result. Link to comment Share on other sites More sharing options...
George BM Posted July 16, 2019 Author Share Posted July 16, 2019 https://twitter.com/islivingston/status/1151137077431422976 1 Link to comment Share on other sites More sharing options...
MN Transplant Posted July 16, 2019 Share Posted July 16, 2019 GFS is struggling with the urban heat island. Significant difference between DCA and IAD. The Euro- I don’t know. Edit - Saturday afternoon. Euro is 105ish, all the other globals are 98-101. Link to comment Share on other sites More sharing options...
H2O Posted July 16, 2019 Share Posted July 16, 2019 1 hour ago, MN Transplant said: GFS is struggling with the urban heat island. Significant difference between DCA and IAD. The Euro- I don’t know. Edit - Saturday afternoon. Euro is 105ish, all the other globals are 98-101. you realize what you are saying? Whats the difference between 100 or 105 when your flesh is sizzling and crackling like frying up chicharrones? 1 5 Link to comment Share on other sites More sharing options...
JakkelWx Posted July 16, 2019 Share Posted July 16, 2019 93/75 with scattered cumulus mediocris around Link to comment Share on other sites More sharing options...
Eskimo Joe Posted July 16, 2019 Share Posted July 16, 2019 14:00 on 7/16/19: Baltimore Inner Harbor (KDMH): 97/72 Stafford, VA (KRMN): 99/72 Fredericksburg, VA (KEZF): 95/73 RMN and EZF are both reporting full sun and have west or southwest winds, while we have some filtered high clouds so the higher temps aren't unbelievable, IMO. Link to comment Share on other sites More sharing options...
mattie g Posted July 16, 2019 Share Posted July 16, 2019 I don't mind heat all that much, but when the nighttime lows aren't actually low...that's when I get annoyed. Link to comment Share on other sites More sharing options...
JakkelWx Posted July 16, 2019 Share Posted July 16, 2019 23 minutes ago, Eskimo Joe said: 14:00 on 7/16/19: Baltimore Inner Harbor (KDMH): 97/72 Stafford, VA (KRMN): 99/72 Fredericksburg, VA (KEZF): 95/73 RMN and EZF are both reporting full sun and have west or southwest winds, while we have some filtered high clouds so the higher temps aren't unbelievable, IMO. Stafford airport recorded a dewpoint of 82 degrees around 10 AM. Link to comment Share on other sites More sharing options...
Eskimo Joe Posted July 16, 2019 Share Posted July 16, 2019 7 minutes ago, JakkelWx said: Stafford airport recorded a dewpoint of 82 degrees around 10 AM. Huh, well then it's likely suspect. 1 Link to comment Share on other sites More sharing options...
JakkelWx Posted July 16, 2019 Share Posted July 16, 2019 1 minute ago, Eskimo Joe said: Huh, well then it's likely suspect. Sometimes during the summer when the sun comes up strong, the rapid rise in temperature can cause the dewpoint to rise fast before falling back down. Link to comment Share on other sites More sharing options...
Eskimo Joe Posted July 16, 2019 Share Posted July 16, 2019 Just now, JakkelWx said: Sometimes during the summer when the sun comes up strong, the rapid rise in temperature can cause the dewpoint to rise fast before falling back down. True, also it's not terrible far from the Potomac River. The Td is right in line with surrounding sites and EZF is hot too which is why I initially didn't discount the reading. Link to comment Share on other sites More sharing options...
yoda Posted July 16, 2019 Share Posted July 16, 2019 I see AKQ and PHL have issued HA's for tomorrow for pretty much all of their zones... wonder if LWX will issue one along the I95 corridor/metro areas tomorrow morning Link to comment Share on other sites More sharing options...
CAPE Posted July 16, 2019 Share Posted July 16, 2019 26 minutes ago, yoda said: I see AKQ and PHL have issued HA's for tomorrow for pretty much all of their zones... wonder if LWX will issue one along the I95 corridor/metro areas tomorrow morning Forecast high for for tomorrow here was 93 this morning, now its 96. Dews expected to be about the same. HA or not, its gonna be hot. Forecast high for Sat is 99 here now. Pretty confident that will bust low. I don't think I have seen a high in my yard exceeding 97 since I have lived here. No urbanization whatsoever. Just farms and trees. Love to see 100 just for the hell of it. Link to comment Share on other sites More sharing options...
CAPE Posted July 16, 2019 Share Posted July 16, 2019 35 minutes ago, losetoa6 said: 88/75 currently. 88/73 here. I would love to see 100/80 Fri and or Sat lol. I always bust low here with these Atlantic heat ridge setups. The wildcard is the remnant tropical air mass getting injected from Barry. 1 Link to comment Share on other sites More sharing options...
JakkelWx Posted July 16, 2019 Share Posted July 16, 2019 8 minutes ago, C.A.P.E. said: 88/73 here. I would love to see 100/80 Fri and or Sat lol. I always bust low here with these Atlantic heat ridge setups. The wildcard is the remnant tropical air mass getting injected from Barry. You sure your weather station (if you have one) isn't under a bunch of trees? Seems kinda low for today's temps. Like under a whole forest. A couple trees is fine. Link to comment Share on other sites More sharing options...
CAPE Posted July 16, 2019 Share Posted July 16, 2019 40 minutes ago, JakkelWx said: You sure your weather station (if you have one) isn't under a bunch of trees? Seems kinda low for today's temps. Like under a whole forest. A couple trees is fine. That was the current temp and dp readings. Not the high. Official temp is supposed to be taken without influence from direct sun, so shade/trees are not relevant. My station is 3-4 ft off the ground. It does get "sun soaked" for about 6-8 hours this time of year btw. It's designed well enough that the sun has little influence though- I check my station temp against an auxiliary temp sensor I keep on the north side of the house(no sun at all) and its within a couple degrees. High temps were 91 and 93 from the 2 sensors today, respectively. Link to comment Share on other sites More sharing options...
JakkelWx Posted July 16, 2019 Share Posted July 16, 2019 7 minutes ago, C.A.P.E. said: That was the current temp and dp readings. Not the high. Official temp is supposed to be taken without influence from direct sun, so shade/trees are not relevant. My station is 3-4 ft off the ground. It does get "sun soaked" for about 6-8 hours this time of year btw. It's designed well enough that the sun has little influence though- I check my station temp against an auxiliary temp sensor I keep on the north side of the house(no sun at all) and its within a couple degrees. High temps were 91 and 93 from the 2 sensors today, respectively. Ah. I misread. I live basically right in the middle of a neighborhood so my readings are gonna be slightly higher. However I only have one station, so I might invest in another thermometer. 92/74 here currently, the dewpoint fell a little after a high of 95. 1 Link to comment Share on other sites More sharing options...
CAPE Posted July 16, 2019 Share Posted July 16, 2019 2 minutes ago, JakkelWx said: Ah. I misread. I live basically right in the middle of a neighborhood so my readings are gonna be slightly higher. However I only have one station, so I might invest in another thermometer. 92/74 here currently, the dewpoint fell a little after a high of 95. That makes a difference. I am totally in the woods, with no neighbors nearby, but the back yard does get some decent sun. 1 Link to comment Share on other sites More sharing options...
CAPE Posted July 16, 2019 Share Posted July 16, 2019 The sacrifice I make is there is no way to get decent wind readings with all the trees and the location of my station. I really don't care about that though. 1 Link to comment Share on other sites More sharing options...
JakkelWx Posted July 16, 2019 Share Posted July 16, 2019 Serious weather situation storm developing in the movie Twister right now. 1 2 Link to comment Share on other sites More sharing options...
high risk Posted July 17, 2019 Share Posted July 17, 2019 really impressive lightning show to my southeast on that northern PG County cell Link to comment Share on other sites More sharing options...
Stormpc Posted July 17, 2019 Share Posted July 17, 2019 Speaking of lightning, we got blitzed today by an afternoon storm that was absolutely charged. Unreal lighting down this way. (Currituck NC) 2 1 Link to comment Share on other sites More sharing options...
WxUSAF Posted July 17, 2019 Share Posted July 17, 2019 Can hear thunder but looks like rain might just miss. Link to comment Share on other sites More sharing options...
yoda Posted July 17, 2019 Share Posted July 17, 2019 4 hours ago, yoda said: I see AKQ and PHL have issued HA's for tomorrow for pretty much all of their zones... wonder if LWX will issue one along the I95 corridor/metro areas tomorrow morning There it is URGENT - WEATHER MESSAGE National Weather Service Baltimore MD/Washington DC 849 PM EDT Tue Jul 16 2019 DCZ001-MDZ011-013-014-016>018-504-506-508-VAZ052>057-170900- /O.NEW.KLWX.HT.Y.0001.190717T1500Z-190718T0000Z/ District of Columbia-Southern Baltimore-Prince Georges- Anne Arundel-Charles-St. Marys-Calvert- Central and Southeast Montgomery-Central and Southeast Howard- Southeast Harford-Prince William/Manassas/Manassas Park-Fairfax- Arlington/Falls Church/Alexandria-Stafford-Spotsylvania- King George- Including the cities of Washington, Baltimore, Bowie, Suitland-Silver Hill, Clinton, College Park, Greenbelt, Laurel, Camp Springs, Glen Burnie, Annapolis, Severn, South Gate, Severna Park, Arnold, Odenton, St. Charles, Waldorf, Lexington Park, California, Chesapeake Beach, Huntingtown, Dunkirk, North Beach, Lusby, Prince Frederick, Bethesda, Rockville, Gaithersburg, Silver Spring, Columbia, Ellicott City, Aberdeen, Dale City, Manassas, Woodbridge, Lake Ridge, Montclair, Reston, Herndon, Annandale, Centreville, Chantilly, McLean, Franconia, Arlington, Alexandria, Falls Church, Falmouth, Fredericksburg, and Dahlgren 849 PM EDT Tue Jul 16 2019 ...HEAT ADVISORY IN EFFECT FROM 11 AM TO 8 PM EDT WEDNESDAY... The National Weather Service in Baltimore MD/Washington has issued a Heat Advisory, which is in effect from 11 AM to 8 PM EDT Wednesday. * HEAT INDEX VALUES...Around 105 degrees with temperatures in the middle 90s and dewpoints in the lower to middle 70s. * IMPACTS...The heat and humidity may cause heat stress during outdoor exertion or extended exposure. Link to comment Share on other sites More sharing options...
JakkelWx Posted July 17, 2019 Share Posted July 17, 2019 82/77 heat index still around 90F. Link to comment Share on other sites More sharing options...
dailylurker Posted July 17, 2019 Share Posted July 17, 2019 Short term models have a nice batch of rain and storm coming through the area this evening. The wet conditions continue. Link to comment Share on other sites More sharing options...
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