Dave Grogan

Husband, father, grandfather, son, brother, friend. Geologist, naturalist, wanabee mountaineer, astronomer, physicist. Loyal fan of Skins, Orioles, Terps, Caps!

[Dave Grogan @grogandave]

#AuroraBorealis Carroll County, Maryland @TamithaSkov

[Dave Grogan @grogandave]

#AuroraBorealis north-central Maryland @TamithaSkov

[Matthew Johnson @KSL_Matt]

The Lake Tahoe region in the Sierra Nevada has been seeing their snowiest season in 70 years. In the recent 3 day blizzard they’ve picked up 83” of snow and 12.5 feet in the last week! This video of a local’s driveway says it all. #cawx

📍: Soda Springs, CA
📸: Janelle Potvin

[Massimo @Rainmaker1973]

Photographer Mark Smith captured the stunning moment when an osprey emerges from the ocean clawed onto its prey, a barracuda

[more videos: https://t.co/fSMzFAvqyR]
[site: https://t.co/gmccdmRHkG]

[Dr. Tamitha Skov @TamithaSkov]

Direct Hit! An Earth-directed #solarstorm is on its way. NASA & NOAA predictions show the time window for impact begins the afternoon of February 17. Once the storm hits, #aurora is possible to mid-latitudes. Expect amateur #radio & #GPS reception issues on Earth's nightside.

[Massimo @Rainmaker1973]

Horsetail Fall in Yosemite National Park, is a seasonal waterfall that occurs on the east side of El Capitan. If the weather conditions are just right, In February the setting sun makes it glow orange and red

[📹Brandon Angliss: https://t.co/r2KDepdjHo]
https://t.co/OVXCCCRe1u

[The Spectator Index @spectatorindex]

BREAKING: Record low temperature recorded in the US as wind chill in New Hampshire drops to -105°F (-76°C).

[Peter Forister 🍁🍂🍁 @forecaster25]

INSANE conditions on Mt Washington, NH. 120mph+ winds and -95°F wind chill. It is above the tropopause, meaning that these are stratospheric winds.

Footage from the summit live stream 2:30-2:40pm. #nhwx

[NOAA Education @NOAAeducation]

NEW from NOAA SOS: This dataset shows the tsunami wave caused by the asteroid that hit Earth 66 million years ago. The wave was so impressive because the asteroid is estimated to have been 6+ miles (10+ km) in diameter! Want to learn more? https://t.co/MHCGQ1VDEa
#dataviz #Data

[Simon Kuestenmacher @simongerman600]

No country has a more easily recognizable population density as Egypt. The Nile is everything to the nation. Source: https://t.co/07gsbemOVv HT: @researchremora

[Vala Afshar @ValaAfshar]

The shockwaves from volcano eruption pushes the clouds away 🌋☁️

[Cliff Pickover @pickover]

Mathematics.

Why circles, right-angle triangles, angles, sin, and cos, are all related. https://t.co/xHwkcv3x46

[Maryland Terrapins @umterps]

RT and Like if this is the best state flag

[Joshua Stevens @jscarto]

The configuration of the #PolarVortex may have played a role in unleashing bitter cold followed by record warmth in North America last week.

2022 ended in weather whiplash for many in the U.S.

The latest from @avoiland and me: https://t.co/nYatTHM0UU #maps #dataviz

[Dave Grogan @grogandave]

@stokdog Looks familiar

[Dave Grogan @grogandave]

View looking east across 18th green @RWGC_MD in Mt. Airy MD yesterday evening

[Dave Grogan @grogandave]

@nemerevermore Hold the sardines please

[NFL on CBS 🏈 @NFLonCBS]

Retweet if you can name all of these players without looking at the comments.

[Dave Grogan @grogandave]

@stokdog A cowasaki I presume?

[USGS Earthquakes @USGS_Quakes]

Notable quake, preliminary info: M 7.0 - Vanuatu region https://t.co/J1xLeJA2ng