Due to a reduction in staff, NOAA GLERL's communications services will be taking an indefinite hiatus. Please follow @ciglr_um to stay updated on GLERL and CIGLR's collective Great Lakes science.

Congratulations to NOAA GLERL Director Deborah Lee on her retirement this week, after over 40 yrs of civil service! 🎉 Throughout her career, Lee's work managing freshwater resources has profoundly benefited America's citizens, environment & economy. https://t.co/oUUJPULV0j

This #InvasiveSpecies week, check out the Great Lakes Aquatic Nonindigenous Species Information System (@GLANSIS_news), a fantastic, "one-stop shop" tool for Great Lakes invasive species info. https://t.co/jiRYV0sO7e #NISAW #GreatLakes #GreatLakesSci

Check out @NOAAClimate's latest Polar Vortex Blog! Though parts of the U.S. have been very cold and snowy, experts do not think there's much evidence that the #polarvortex is the main driver of our #winter #weather so far this year. 🔗: https://t.co/UbfoxNOCF4

After a near record warmth day… Temperatures cool along with chances of scattered rain and snow showers to the region tonight/Tuesday morning. Even a glaze of ice for localized areas cannot be ruled out at this time. #miwx

Flood Safety Awareness Week in Wisconsin: A Flood Warning means take action. Flooding is occurring and you may need to evacuate. A Flood Watch means be prepared and stay tuned for more information.

It's National Invasive Species Awareness Week! Today at 2:30pm ET, check out what @NOAA is doing to Support Biosecurity in Marine and Great Lakes Environments: https://t.co/abI7tmZKBG #NISAW

It wouldn't be #ValentinesDay without mentioning the lake that's #Superior to all other lakes in our 💙... ...& the lake that's superior to other #GreatLakes in surface area, depth, volume, & cold temperatures, but who's counting? Happy V-Day from MN Sea Grant! @LakeSuperior

Hey Valentine, are you hypoxia? Because you take my breath away! Happy Valentine's Day from NOAA GLERL! https://t.co/BNPGpgPvG6

Here’s a look at current #GreatLakes ice cover for this wintry week! Great Lakes total: 30.8% Superior: 17.5% Michigan: 22.0% Huron: 38.9% Erie: 92.9% Ontario: 15.2% Access current ice graphs & data: https://t.co/YrIG39u7qE

Life without you? What a load of carp!🐟 This #ValentinesDay, let’s celebrate the people who make our lives fin-tastic! Share this with someone to say they're o-fish-ally your favorite! 🎣💕

Happy #ValentinesDay...well, Valentine's Week! We love large lakes and we cannot lie - join us in celebrating our love of water (and puns) all week long!💙 Tag someone you're hooked on below 👀🎣

PLEASE SHARE! 📢 #CIGLR is excited to announce the opening of our 2025 #GreatLakes Summer Fellow applications! There are 7 full-time, 12-week positions paying $10,000 each. Applications are due 09 Feb 2025 at 11:59 pm EST! Eligibility & how to apply: https://t.co/64i6oFP84m

Hold onto your hats!! Strong winds are creating big waves in the #GreatLakes today and tonight, reaching up to 22 feet in #LakeSuperior and #LakeOntario. Latest NCEP WaveWatch III graphics: https://t.co/N96b0gybxE #GreatLakes #GreatLakesSci

Strong winds will continue area-wide today with gusts up to 45 mph (locally up to 50 mph possible). The winds in combination with dry conditions will also make for an elevated brush fire risk for areas along and north of I-80. #ILwx #INwx

A snow squall is a brief period of heavy snowfall with reduced winds & low visibility. Snow squalls are possible today (1/27) through Wednesday for the Great Lakes, Mid-Atlantic, & Northeast. Get 4 tips on how to stay safe during a snow squall: https://t.co/4uaFqKXyCa @NWS

Heading into the weekend with 23.2% ice cover on the #GreatLakes. #LakeErie has seen rapid ice growth this week, jumping from 38% on Monday to 85% now! Current ice on the rest of the lakes: Sup: 8.2% Mich: 21.5% Hur: 25.3% Ont: 13.4% Ice graphs & stats: https://t.co/YrIG39uFgc

Brrr... 🥶 We hope you're staying warmer than the #GreatLakes are this week! Ice cover on the lakes is currently at 20.8%, just about average for this time of year. Ice cover by lake: Superior: 9.5% Michigan: 20.3% Huron: 26.7% Erie: 58.2% Ontario: 7.1% https://t.co/YrIG39uFgc

Minimum wind chills from this morning, 15 to 25 below zero.

With the ongoing cold, many ponds and lakes may have become ice-covered. That doesn't mean it's safe to walk on! Long-periods of extended cold are necessary to create ice thick enough (4+ inches) to support activity. If you don't know, don't go!