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Kelly Hereid

@kellyhereid

Climate scientist, geologist, and catastrophe modeler, Liberty Mutual. Posts on all things hurricane, wildfire, flood, earthquake, tornado. Sassy takes are mine not employer's. πŸ“Oakland, CA Website: hereidk.strikingly.com

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Latest posts by Kelly Hereid @kellyhereid

National Water Prediction Service - NOAA

Tonight, I was looking at water.noaa.gov to see where the US is flooding. My 11-year old pointed to the ongoing major flooding in North Dakota, and I said "Oh, that's Devils Lake. It's always flooding there." They asked "Why?" and a rabbit hole yawned before me.

10.03.2026 02:07 πŸ‘ 92 πŸ” 24 πŸ’¬ 3 πŸ“Œ 2
Preview
This Public Power Movement is Raising a Billion Dollar Question Who should pay to manage wildfire risk in California? As the climate gets warmer and weirder, it’s getting harder to safely move hundreds of gigawatts of electricity across millions of miles of pow…

Meredith Fowlie, our utility wildfire risk maven, discusses how new CA legislation that produces barriers to creating a municipal utility might shift the burden of wildfire prevention and damages.
energyathaas.wordpress.com/2026/03/09/t...

09.03.2026 23:50 πŸ‘ 5 πŸ” 3 πŸ’¬ 0 πŸ“Œ 2
Screenshot of USGS event page, M6.0 373km under Naples

Screenshot of USGS event page, M6.0 373km under Naples

Not seeing eqsky get nearly riled up enough yet about this absolute weirdo. 373km depth??? earthquake.usgs.gov/earthquakes/... βš’οΈ

09.03.2026 23:53 πŸ‘ 19 πŸ” 5 πŸ’¬ 1 πŸ“Œ 0

State level rating is more actuaries than me. But strong building codes cut catastrophe portion of annual loss - esp hurricane. Cat is varying part of total premium.

In high hazard areas, something like putting on @ibhs.org FORTIFIED roof (and telling insurer) is a powerful tool to get best rates.

09.03.2026 23:18 πŸ‘ 2 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

Glad you found it too! But yeah stronger for HU (and I'd bet EQ, although that doesn't touch homeowners as much due to low take up)

09.03.2026 22:38 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
Economic Effectiveness of Implementing a Statewide Building Code: The Case of Florida on JSTOR Kevin M. Simmons, Jeffrey Czajkowski, James M. Done, Economic Effectiveness of Implementing a Statewide Building Code: The Case of Florida, Land Economics, Vol. 94, No. 2 (May 2018), pp. 155-174

My favorite insurance paper that not nearly enough people have read - FL building code cutting wind claims by 72(???!!?)%

Written w @climate-done.bsky.social, great example of an *incredibly valuable* NCAR collaboration.
www.jstor.org/stable/26449...

09.03.2026 22:02 πŸ‘ 4 πŸ” 1 πŸ’¬ 1 πŸ“Œ 0

Signal likely muddied by hail risk, where building code has much smaller impact on losses, and states like TX where year built has little relationship to code improvements (no statewide building code, just a patchwork of locals)

09.03.2026 21:49 πŸ‘ 6 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
IBHS Rating the States report

IBHS Rating the States report

Excellent and thoughtful paper, as usual.

One point of clarification re: home age. Insurers typically aren't using as proxy for maintenance, but rather building code.

Bet you'd see stronger association looking at year built in hurricane states with strong statewide codes ibhs.org/public-polic...

09.03.2026 21:47 πŸ‘ 6 πŸ” 0 πŸ’¬ 4 πŸ“Œ 0
Preview
Who Would Want to Kill the New Chevy Bolt? A test drive provided tantalizing evidence that a great, cheap EV is possible for the U.S.

When @andrewmoseman.bsky.social got behind the wheel of the new Chevy Bolt, all he could think was, β€œWho would want to kill this car?”

Read more about his test drive and what it says about the future of affordable EVs:

heatmap.news/electric-veh...

09.03.2026 20:05 πŸ‘ 12 πŸ” 5 πŸ’¬ 2 πŸ“Œ 2

Sorry probably need to click to expand and see all 4

09.03.2026 21:04 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
Post image

Excited to share a new @nber.org paper w/Blonz/Hossain/Mulder/Weill where we show credit scores impact homeowners insurance premiums as much as disaster risk.

Here’s what happened in WA when they banned credit scoring:

09.03.2026 20:19 πŸ‘ 36 πŸ” 13 πŸ’¬ 2 πŸ“Œ 1
Preview
Exclusive: Joint Typhoon Warning Center dataset withdrawal prompts search for alternatives A dataset created by U.S. military forecaster Joint Typhoon Warning Center that insurers used to settle contracts has been taken offline, with the U.S. Navy telling The Insurer that it had never been ...

The β€œpublic facing not assured” seems to stem from this kerfuffle: www.theinsurer.com/ti/news/excl...

09.03.2026 20:37 πŸ‘ 5 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Wonder if these are what they meant by 4 populated areas? Because it… misses a few

09.03.2026 20:30 πŸ‘ 4 πŸ” 1 πŸ’¬ 2 πŸ“Œ 0
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More than 30 years ago, I began teaching courses on data analysis in the earth sciences. 20 years ago, I started thinking about writing textbooks. Now there are six textbooks and many different course formats for you. Here are the options for you:

mres.uni-potsdam.de/2025/10/15/o...

09.03.2026 09:29 πŸ‘ 14 πŸ” 4 πŸ’¬ 0 πŸ“Œ 0

Got an answer here, guess it means yet another day trying to figure out fresh data holes

09.03.2026 19:34 πŸ‘ 3 πŸ” 0 πŸ’¬ 2 πŸ“Œ 0

At 9 months along there is truly no other word for it

09.03.2026 17:59 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Here’s the word from Levi Cowan at JTWC: β€œThe new policy outlined by the notice took effect as of March 5th, and the notice was then removed from JTWC’s web pages.”

09.03.2026 16:35 πŸ‘ 4 πŸ” 1 πŸ’¬ 1 πŸ“Œ 1

Thanks for investigating, good idea to pitch this to TS list.

09.03.2026 17:58 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Oh weather's not nice enough to bike?

She just biked to the hospital while catastrophically pregnant and brought home a newborn, in the grossest time of year in Minnesota. Excuses not valid.

09.03.2026 16:25 πŸ‘ 14 πŸ” 2 πŸ’¬ 1 πŸ“Œ 0

Cycling flex cc @davidho.bsky.social

09.03.2026 16:23 πŸ‘ 35 πŸ” 4 πŸ’¬ 2 πŸ“Œ 0

Interestingly, end of last week the Joint Typhoon warning center had a service advisory up saying that they were cutting forecast frequency in half in most of the Southern Hemisphere.

Today advisory is gone. Does anyone know if that means they rescinded the change or just took down the notice??

09.03.2026 13:35 πŸ‘ 25 πŸ” 6 πŸ’¬ 3 πŸ“Œ 0

This was the first book of hers that I read, so don't have a basis for comparison, but found this book lovely and thoughtful.

09.03.2026 00:48 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

Meanwhile as a renter I choose an energy provider that is 100% renewable - but am pinned to PG&E rates + an extra load, so I get to pay for those gas peakers anyway.

Hope y'all are enjoying your solar panels.

09.03.2026 00:13 πŸ‘ 17 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0

This story has everything, a focus on desal that led to overlooking other water sources, a city manager making $400K/yr saying don’t panic, a former water system manager saying residents should absolutely panic, and magical thinking: β€œThe last hope to avert disaster was a 20- to 30-inch rainfall.”

08.03.2026 21:17 πŸ‘ 351 πŸ” 176 πŸ’¬ 11 πŸ“Œ 14
Flowers for Algernon, Daniel Keyes

Flowers for Algernon, Daniel Keyes

Flowers for Algernon, Daniel Keyes

Jumped from the last read that was basically a fluffed up blog post to some proper literature.

Some aspects are a product of their time (although the manic pixie dream girl still shows up nowadays).

But the rest... woof. Heartbreaking. Beautiful.

17/

08.03.2026 22:50 πŸ‘ 4 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Actually super useful for getting a gut feel for how different regions make energy.

Lots of oil? Good chance it's an island
Hydro? Think topography, dominates several grids in South America
Mostly geothermal? Instant Iceland tell

08.03.2026 15:47 πŸ‘ 3 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
 Growth of N(t) ( by model modality, 2019–2025, on a log scale.

Text-only variants remain the largest class, but multimodal models exhibit the steepest relative growth, signaling imminent attribution challenges in image+text domains.

Growth of N(t) ( by model modality, 2019–2025, on a log scale. Text-only variants remain the largest class, but multimodal models exhibit the steepest relative growth, signaling imminent attribution challenges in image+text domains.

If GenAI, such as a large language model, is used in a cyberattack or disinformation campaigns, can it be specifically identified? Can we tell which one was it?
The alarming answer is: probably not (and it's likely to get worse). πŸ§ͺ

Link: journals.plos.org/complexsyste...

08.03.2026 07:48 πŸ‘ 17 πŸ” 8 πŸ’¬ 2 πŸ“Œ 0
Preview
GloMarGridding: A Python Toolkit for Flexible Spatial Interpolation in Climate Applications Global surface climate datasets contain structural uncertainty that is difficult to attribute to individual processing steps. We present GloMarGridding, a Python package that isolates the spatial int....

And now the paper describing the open source software used to create DCENT-I is published too.

rmets.onlinelibrary.wiley.com/doi/10.1002/...

08.03.2026 13:07 πŸ‘ 11 πŸ” 4 πŸ’¬ 0 πŸ“Œ 0

Its kinda dark that international women's day is the day that is 23/24 the length of a typical day

08.03.2026 14:23 πŸ‘ 9 πŸ” 4 πŸ’¬ 0 πŸ“Œ 1
Screenshot of Griddle, aka Wordle for energy mix

Screenshot of Griddle, aka Wordle for energy mix

If that's how you pub quiz, that means you've definitely seen @jmelville.science's Griddle, right??

(Wordle for electricity grid energy mix)

jmelville.science/griddle/

08.03.2026 14:17 πŸ‘ 8 πŸ” 3 πŸ’¬ 1 πŸ“Œ 1