Climate Crisis, Biosphere & Societal Collapse

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National Oceanic and Atmospheric Association (NOAA) Global Temperature Rankings Outlook (US) - Tool that is updated each month, concurrent with the release of the monthly global climate report.

Canadian Wildland Fire Information System - Government of Canada

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Wet-bulb globe temperature (WBGT) warnings for the U.S. today (sopuli.xyz)

submitted 10 months ago* (last edited 10 months ago) by [email protected] to c/[email protected]

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Source: https://digital.mdl.nws.noaa.gov/?zoom=4&lat=37&lon=-96.5&layers=F000BTTTFTT®ion=0&element=8&mxmz=false&barbs=false&subl=TFFFFF&units=english&wunits=nautical&coords=latlon&tunits=localt

If you live in any of these areas, stay safe and healthy and remember to look out for your friends and neighbours who might be vulnerable.

edit: thanks for the correction Deme.
edit2: the temperatures were in Fahrenheit, I guess I switched to Celcius and took the screenshot before the change had loaded. The website seems to reeeeeally struggle with switching units, so I'm going to leave it in (properly marked) Fahrenheit. I don't know, I thought the National Weather Service was going straight to the source, but their website is really shit.

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[–] [email protected] 27 points 10 months ago* (last edited 10 months ago) (1 children)

*Wet-bulb globe temperature (WBGT) warnings.

Wet-bulb is a part of a measurement instrument (the wet-bulb thermometer).

Wet-bulb temperature (WBT) is the lowest temperature that can be reached through evapourative cooling in the present ambient temperature and humidity. A high WBT results in your body starting to overheat as sweating looses effectiveness.

WBGT is an index for measuring heat stress in direct sunshine. It takes into account the effects of wind speed and solar radiation.

Here's the map for WBT for that timestamp from windy.com using ECMWF data:

The highest WBT I could find there was around 29°C.

[–] droans 6 points 10 months ago

Fortunately it doesn't seem to be deadly levels. But it's still in the "don't exert yourself too much, carry water, take frequent breaks" level.

[–] [email protected] 20 points 10 months ago* (last edited 10 months ago) (1 children)

@0101010001110100 Thanks for the warning! FYI, wet bulb *globe* temperatures (which this map reports) aren't the same thing as wet bulb temperatures.

When you hear about certain wet bulb temperatures being unsurvivable, the assumption is one has already found shade and that is the wet bulb temperature out of direct sunlight. Or put another way, those fatality limits are if the wet bulb temperature in shade is over a threshold, then it's fatal.

Wet-bulb *globe* temperatures are slightly different: they're the weather forecast in direct sunlight. Moving to shade helps get you into a lower wet-bulb temperature.

So this is Bad, but it's not *quite* as catastrophic as it sounds like.

[–] [email protected] 5 points 10 months ago (2 children)

Is there a site that shows actual wet bulb risk forecasts globally based on accumulated weather data sets? I'm guessing this will become more and more relevant, especially around the equator.