weatherCCB Posted Wednesday at 06:07 PM Share Posted Wednesday at 06:07 PM 95/75 10 mile bike ride . The heat is legit. Be careful and smart 1 1 Link to comment Share on other sites More sharing options...
Eskimo Joe Posted Wednesday at 06:15 PM Share Posted Wednesday at 06:15 PM DCA getting river winded to death and still managing the mid 90s is a testament to the urban heat island. Link to comment Share on other sites More sharing options...
MN Transplant Posted Wednesday at 06:21 PM Share Posted Wednesday at 06:21 PM Temps are running on the low side of (the crazy) guidance but that is being overwhelmed by the DPs being higher. 1 Link to comment Share on other sites More sharing options...
Terpeast Posted Wednesday at 06:21 PM Share Posted Wednesday at 06:21 PM Hey everyone, hope you all are doing well! I know I haven't been around much lately, just dealing with some changes. But anyway, came here to say that, yeah it's really hot. 99 already with a dewpoint of 76. 6 Link to comment Share on other sites More sharing options...
MN Transplant Posted Wednesday at 06:22 PM Share Posted Wednesday at 06:22 PM 6 minutes ago, Eskimo Joe said: DCA getting river winded to death and still managing the mid 90s is a testament to the urban heat island. 105 HI on the first day of a heat wave with a river wind is something else. Link to comment Share on other sites More sharing options...
Pityflakes Posted Wednesday at 06:24 PM Share Posted Wednesday at 06:24 PM 7 minutes ago, Eskimo Joe said: DCA getting river winded to death and still managing the mid 90s is a testament to the urban heat island. South wind can't be beat at DCA. They won't get the "goods" until the westerly component picks up tomorrow/Friday. Also when the atmosphere dries out a bit, yeesh. Link to comment Share on other sites More sharing options...
Eskimo Joe Posted Wednesday at 06:26 PM Share Posted Wednesday at 06:26 PM 3 minutes ago, MN Transplant said: 105 HI on the first day of a heat wave with a river wind is something else. Yea that doesn't bode well for the next two days. Link to comment Share on other sites More sharing options...
pazzo83 Posted Wednesday at 06:36 PM Share Posted Wednesday at 06:36 PM 95/75 at DCA is pretty brutal. Link to comment Share on other sites More sharing options...
Eskimo Joe Posted Wednesday at 06:48 PM Share Posted Wednesday at 06:48 PM Churchville in Harford County is getting the smallest bit of help from a bay breeze. 91/81. Link to comment Share on other sites More sharing options...
pazzo83 Posted Wednesday at 06:51 PM Share Posted Wednesday at 06:51 PM not sure a low 80s dewpoint is much help lol 1 Link to comment Share on other sites More sharing options...
yoda Posted Wednesday at 06:53 PM Author Share Posted Wednesday at 06:53 PM X Zone Forecast Product National Weather Service Baltimore MD/Washington DC 226 PM EDT Wed Jul 1 2026 DCZ001-012200- District of Columbia- Including the cities of Adams Morgan and Washington 226 PM EDT Wed Jul 1 2026 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM EDT THIS EVENING... ...EXTREME HEAT WARNING IN EFFECT FROM 10 AM TO 8 PM EDT THURSDAY... ...EXTREME HEAT WARNING IN EFFECT FROM 10 AM TO 8 PM EDT FRIDAY... .THIS AFTERNOON...Sunny, hot with highs in the upper 90s. Southwest winds 5 to 10 mph with gusts up to 20 mph. Heat index values up to 109. .TONIGHT...Mostly clear. Isolated showers and thunderstorms in the evening. Lows in the upper 70s. Southwest winds 5 to 10 mph. Chance of rain 20 percent. .THURSDAY...Sunny, hot with highs around 103. West winds around 5 mph. Heat index values up to 111. .THURSDAY NIGHT...Clear. Lows around 80. Southwest winds around 5 mph in the evening, becoming light and variable. .FRIDAY...Sunny, hot with highs around 104. Northwest winds around 5 mph. Heat index values up to 113. .FRIDAY NIGHT...Partly cloudy. Lows around 80. .INDEPENDENCE DAY...Mostly sunny with a chance of showers and thunderstorms. Hot with highs around 100. Chance of rain 50 percent. Heat index values up to 110. .SATURDAY NIGHT...Mostly cloudy with a chance of showers and thunderstorms. Lows in the upper 70s. Chance of rain 50 percent. .SUNDAY...Showers likely with a chance of thunderstorms. Hot with highs in the upper 90s. Chance of rain 60 percent. Heat index values up to 110. Link to comment Share on other sites More sharing options...
SnowtoRain Posted Wednesday at 06:54 PM Share Posted Wednesday at 06:54 PM 94.1/79.5, feels like 113. Link to comment Share on other sites More sharing options...
pazzo83 Posted Wednesday at 06:54 PM Share Posted Wednesday at 06:54 PM lol "including the cities of Adams Morgan and Washington" - need to check that! DC has not had any separate municipalities since the late 1800s! 2 Link to comment Share on other sites More sharing options...
JakkelWx Posted Wednesday at 06:57 PM Share Posted Wednesday at 06:57 PM 94/79 with a couple of 80 dews nearby. off the charts humid. Link to comment Share on other sites More sharing options...
kgottwald Posted Wednesday at 07:01 PM Share Posted Wednesday at 07:01 PM IAD stalled at 95 for the past few hours Link to comment Share on other sites More sharing options...
H2O Posted Wednesday at 07:04 PM Share Posted Wednesday at 07:04 PM 99.5/75.6/114.4 Link to comment Share on other sites More sharing options...
Eskimo Joe Posted Wednesday at 07:05 PM Share Posted Wednesday at 07:05 PM Mesonet network record max heat index of 114° set at College Park mesonet station as of 3pm on 7/1. 5 Link to comment Share on other sites More sharing options...
EC609 Posted Wednesday at 07:08 PM Share Posted Wednesday at 07:08 PM 98 on the hour at KCHO. Link to comment Share on other sites More sharing options...
pazzo83 Posted Wednesday at 07:15 PM Share Posted Wednesday at 07:15 PM CHO is kind of our regional EWR - gets hot as hell out on that tarmac. 1 Link to comment Share on other sites More sharing options...
pazzo83 Posted Wednesday at 07:17 PM Share Posted Wednesday at 07:17 PM 5min ob HI at DCA of nearly 110F. Link to comment Share on other sites More sharing options...
MN Transplant Posted Wednesday at 07:19 PM Share Posted Wednesday at 07:19 PM 13 minutes ago, Eskimo Joe said: Mesonet network record max heat index of 114° set at College Park mesonet station as of 3pm on 7/1. I like the pink lines for 110+. Color gradient gets tough at that point. Link to comment Share on other sites More sharing options...
Eskimo Joe Posted Wednesday at 07:21 PM Share Posted Wednesday at 07:21 PM Just now, MN Transplant said: I like the pink lines for 110+. Color gradient gets tough at that point. That's what you get when you hire @wxmeddler! Link to comment Share on other sites More sharing options...
CAPE Posted Wednesday at 07:23 PM Share Posted Wednesday at 07:23 PM 2 hours ago, SnowenOutThere said: I agree, and the whole study of microclimatology is concerned with that ground heat transfer. The 2m standard was picked for both its "human height" and because it is high enough to not be extremely linked to the ground. However, when forecasting I think it's important to do the overcomplicating bit to account for circumstance. If you're caring for livestock, crops, or forested areas then the best possible forecast would account for what that specific area feels. Especially when it comes to frost and crops there is a multimillion dollar industry of figuring out cold pool drainage at 50cm from the ground. To reiterate, I am not calling the 2m standard bad or useless, but just pointing out its real world limits. Its good that you are thinking about these specific and different circumstances. There is rarely one right answer. However, there are agreed upon accepted official standards, both national and international, about how measurements should be carried out, including the specific measurement techniques, calibration, and uncertainty analysis. As someone who teaches metrology, what caught my eye in your OP was questioning why official air temperature is measured in shade(whether it's at a height of 5, 8, or 10 meters is less important). That's what I was focused on. Hopefully you understand that now. Keep up the good work. Always dig deeper for a more profound understanding. There are specific situations that call for some deviation from accepted norms. The context is important. 1 Link to comment Share on other sites More sharing options...
GATECH Posted Wednesday at 07:26 PM Share Posted Wednesday at 07:26 PM 100, dp 78, HI 119!!! F this sh!t 1 1 Link to comment Share on other sites More sharing options...
CAPE Posted Wednesday at 07:29 PM Share Posted Wednesday at 07:29 PM Currently 94/73. That's the high for the day. Feels pretty sultry and miserable out there if you move a little with the high DP. Standing in the shade and not doing anything feels ok for awhile. 2 Link to comment Share on other sites More sharing options...
87storms Posted Wednesday at 07:30 PM Share Posted Wednesday at 07:30 PM Just now, GATECH said: 100, dp 78, HI 119!!! F this sh!t Dang, I thought it wasn’t supposed to hit 100 until tomorrow. Gonna get spicy in Vegas by the weekend…already getting chippy, but it’s desert dry…probably because it’s the Mojave. Link to comment Share on other sites More sharing options...
Eskimo Joe Posted Wednesday at 07:33 PM Share Posted Wednesday at 07:33 PM Air temp in Poolesville hit 97°, new record high temperature for the site. Link to comment Share on other sites More sharing options...
WVclimo Posted Wednesday at 07:44 PM Share Posted Wednesday at 07:44 PM 97/78 on my station. HI of 114. 2 Link to comment Share on other sites More sharing options...
Mrs.J Posted Wednesday at 07:46 PM Share Posted Wednesday at 07:46 PM 99/75 heat index of 114. No thank you. All the blinds are closed up. 2 Link to comment Share on other sites More sharing options...
EC609 Posted Wednesday at 07:47 PM Share Posted Wednesday at 07:47 PM 31 minutes ago, pazzo83 said: CHO is kind of our regional EWR - gets hot as hell out on that tarmac. Yeah just not sure if some of the Newark numbers over the years are legit. Link to comment Share on other sites More sharing options...
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