The dew point in Mombasa today is 77 degrees

I was in Mombasa and witnessed World XC in 2007. It was quite a site with over 25% of the athletes from the four races combined dropping out (82 to be exact I believe). The heat was oppressive.

The med tent was completely taken over and bodies were everywhere and anywhere close to the finish line area.

I have seen a lot of races in my time, but that day was like none other. The atmosphere of 30-40,000 people crammed into every square inch of that course combined with the heat, the noise and competition was like nothing we will ever see in the USA. It was almost out of control when it was all over. Like a cross country riot!

Of course the Kenyans ruled on their home turf and it was a bad day to be an Ethiopian, even Bekele dropped out with 1k to go. The people went crazy when that happened!

The entire experience was a site to behold and yes above else it was EXTREMELY HOT!!!!!!!!!!!!!!!!!!!!!!!!!!

If you think that's bad, imagine a marathon in those conditions, 40,000 runners. That was Chicago '07. You could slice the air like butter.

An 85 degree day with a dew point of 77, is much worse than a 40 degree day with a dew point of 77.

We've had a record string of days in the 90s in Louisville this year. Also high DP.

http://www.wunderground.com/US/KY/Louisville.html

Highest DP today was 78 and the temp was 81 and it was sunny.

Louisville, KY Temp/Dew Point and other data for this week:

http://www.wunderground.com/cgi-bin/wxStationGraphAll?day=19&year=2010&month=7&ID=KKYLOUIS35&type=2&width=500&showuv=1&showtemp=1&showpressure=1&showwind=1&showwinddir=1&showrain=1

Last week:

http://www.wunderground.com/cgi-bin/wxStationGraphAll?day=12&year=2010&month=7&ID=KKYLOUIS35&type=2&width=500&showuv=1&showtemp=1&showpressure=1&showwind=1&showwinddir=1&showrain=1

In fact....

DP was below 70 for only 3 days since July 4th.

DP was below 70 for only 10 days in June.

Since June 1st, only 13 days have NOT reached 90 degrees. On avg we have about two weeks in the 90s each year. We've about tripled that this year.

And I've been running most days around 1-2pm outdoors.

Alan

not the same thing wrote:

An 85 degree day with a dew point of 77, is much worse than a 40 degree day with a dew point of 77.

It wasn't 40 degrees. It was 88.

Just ran the last few days in Ocean City, Maryland between 8 and 9 a.m. I need to check out what the dew point was because it felt every bit as bad to me as running in Miami. The dew point had to be well in the 70's.

Ironically I witnessed that event as well. I watched person about person peal off somewhere around 15 1/2 miles (closest turn to downtown and the start/finish). It was a very bad day. Only 4-5 guys broke 2:20.

i ran Chicago 07 wrote:

not the same thing wrote:

An 85 degree day with a dew point of 77, is much worse than a 40 degree day with a dew point of 77.

It wasn't 40 degrees. It was 88.

Whatever.

But even an 85 degree day with a dew point of 77,

is much worse than a 40 degree day with a dew point of 77.

Would never happen. If it's 40 degrees with a dew point of 40, the relative humidity is 100%. For most practical purposes the dew point at the earth's surface is never higher than the temperature. A super-saturated environment can occur, for example, in the updraft of a thunderstorm but even then by only a slight margin.

A temperature of 40 and a dew point of 77 is nonsensical. You might be confusing dew point and humidity.

I'm in middle NC right now, and the DP has been consistently between 70-75 for the past month. For about a week stretch it was over 75. Needless to say the 2 afternoon runs I done in the past 30 days were not fun.

I'd love for some of these letsrun pussies to come hang out, and work out, with people whose lives depends on the weather and the dew point.

Pussy-f****** on letsrun.

You guys don't know how easy you have it. I have the misfortune of living in Singapore where the dew point is above 75 degrees EVERY DAY OF THE FREAKING YEAR! Running is hell here (actually, hell probably has better running weather than Singapore). December is as bad as March is as bad as July...you get the idea. It never cools down.

i ran Chicago 07 wrote:

If you think that's bad, imagine a marathon in those conditions, 40,000 runners. That was Chicago '07. You could slice the air like butter.

Does anyone have an actual recorded dew point for chicago 07?

I seem to remember it not being anywhere near as bad at 77, but if I'm wrong, please correct me.

big al wrote:

Would never happen. If it's 40 degrees with a dew point of 40, the relative humidity is 100%. For most practical purposes the dew point at the earth's surface is never higher than the temperature. A super-saturated environment can occur, for example, in the updraft of a thunderstorm but even then by only a slight margin.

A temperature of 40 and a dew point of 77 is nonsensical. You might be confusing dew point and humidity.

you got it

I agree that it was nowhere near a 77 dew point in Chigago. There is a incredibly huge difference between 70 and 77 dew points and I think Chicago was more in the high 60's range?

"In Dhahran, Saudi Arabia on July 8, 2003, the dewpoint was 35 °C (95 °F) while the temperature was 42 °C (108 °F). The heat index at that time was 78 °C (172 °F)."

Singapore Sling wrote:

You guys don't know how easy you have it. I have the misfortune of living in Singapore where the dew point is above 75 degrees EVERY DAY OF THE FREAKING YEAR! Running is hell here (actually, hell probably has better running weather than Singapore). December is as bad as March is as bad as July...you get the idea. It never cools down.

going through 4-5 months of that here in Taiwan

Dewpoint 23-25, sometimes 30. Regularly 35-38 for a high

We had heat index days of >60 degrees: Temp 40C DP of 28, RH 58%.

I just ran 22km in a mild 31 degrees, 63% RH, HI 35 (~96F), at 8pm.

You get used to it....after 15yrs or so.

Not sure if I trust humidity sensors in such extreme values, but when the Gulf is pushing 35C is it certainly feasible for dew points to climb in that direction.

on the runs wrote:

"In Dhahran, Saudi Arabia on July 8, 2003, the dewpoint was 35 °C (95 °F) while the temperature was 42 °C (108 °F). The heat index at that time was 78 °C (172 °F)."

any idea what it is usually for the marathon des sables?