Thursday, September23, 2021
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Marine Weather and Tides
Gary, IN

Version 3.4
NOTICE
3/30/2021 -- ANZ330 has been split into ANZ331 and ANZ332. Click EDIT in Marine Forecast and select your new zone.
1/26/2021 -- The West Coast Satellite images havd been updated. They now use GEOS-17.
1/1/2021 -- The 7 day forecast are now working well. Thank you NOAA for your support.

Sunrise 6:37AMSunset 6:46PM Thursday September 23, 2021 7:08 PM CDT (00:08 UTC) Moonrise 8:15PMMoonset 9:10AM Illumination 93% Phase: Waning Gibbous; Moon at 17 days in cycle
NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.
Marine Forecasts
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LMZ744 Expires:202109240330;;070559 Fzus53 Klot 232021 Nshlot Nearshore Marine Forecast National Weather Service Chicago/romeoville Il 321 Pm Cdt Thu Sep 23 2021 For Waters Within Five Nautical Miles Of Shore On Lake Michigan Waves Are Provided As A Range Of Significant Wave Heights, Which Is The Average Of The Highest 1/3 Of The Waves, Along With The Average Height Of The Highest 10 Percent Of The Waves Which Will Occasionally Be Encountered. Lmz743>745-240330- Calumet Harbor To Gary-gary To Burns Harbor- Burns Harbor To Michigan City- 321 Pm Cdt Thu Sep 23 2021
.small craft advisory in effect through late Friday night...
Tonight..Northwest winds to 30 kt easing to 10 to 20 kt early this evening, then becoming west in the late evening and overnight. Partly cloudy in the evening then clearing. Waves 7 to 10 ft occasionally to 13 ft subsiding to 4 to 7 ft occasionally to 9 ft.
Friday..Southwest winds 10 to 20 kt increasing to 20 to 25 kt in the afternoon. Sunny. Waves 3 to 5 ft subsiding to 2 to 4 ft in the afternoon.
Friday night..South winds to 30 kt becoming west after midnight. Chance of showers and slight chance of Thunderstorms through the night. Waves 2 to 4 ft.
Saturday..West winds 15 to 20 kt. Sunny. Waves 2 to 4 ft.
LMZ744


7 Day Forecast for Marine Location Near Gary, IN
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location: 41.69, -87.32     debug


Area Discussion for - Chicago, IL
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FXUS63 KLOT 240007 AFDLOT

Area Forecast Discussion National Weather Service Chicago/Romeoville, IL 707 PM CDT Thu Sep 23 2021

SHORT TERM. 256 PM CDT

Through Friday night .

A vertically stacked storm system over eastern Lower Michigan has remained just far enough east of the area to keep the showers today over Lake Michigan and adjacent areas of Lake and Porter counties in IN. However, the Chicago metro area has been on the far western periphery of the large cloud shield associated with this system. This has resulted in a bit a temperature contrast across the area. Locations west of the city have seen a good deal of sun through the day, thus allowing their temperatures to climb into the upper 60s to around 70. However, places under the cloud shield, especially into northwestern IN are only in the upper 50s to the low 60s. The lingering showers over Porter county IN will dissipate later this afternoon and skies will clear area- wide, setting up a seasonably chilly night across the area. Expect low temperatures to fall into the 40s outside of the Chicago metro area.

On Friday winds will turn southwesterly and become rather gusty into the afternoon in response to a strengthening surface gradient in advance of an approaching cold frontal trough. Wind gusts are likely to gust up to 35 mph from the southwest during the afternoon and evening. A warmer airmass will filter into the area via these gusty winds, which will support highs area-wide reaching into the upper 70s on Friday afternoon.

Mild and breezy conditions will continue Friday evening as the front begins to shift into northwestern IL. The front will shift across all of northern IL by around, or shortly after midnight, then across my northwestern IN counties by 4 am. While low-level moisture will be rather sparse tomorrow, with surface dewpoints likely in the 40s, dewpoints look to pool a bit into the low to mid 50s along the frontal boundary Friday evening. Given the sharp mid-level trough with decent height falls aloft shifting overhead, the expectation continues to be that a period of showers with some embedded thunderstorms will develop with the frontal boundary. Severe weather is not anticipated, and any showers and storms should end from northwest to southeast following the frontal passage. Cooler temperatures will follow the frontal boundary into Saturday.

KJB

LONG TERM. 110 PM CDT

Saturday through Thursday .

A trend of pleasant and warming conditions through the weekend and into next week is expected.

The cold front that will bring us rain chances Friday night is expected to clear the area by Saturday morning as high pressure begins to move in and dry us out. Winds behind the front will be westerly at 10-15 MPH. Most of us on Saturday will see sunny conditions with the exception of a few clouds near the lake with afternoon highs in the lower 70s.

High pressure will continue to move east heading into Sunday which will turn our winds out of the south and transport warmer air northward to the Great Lakes. Winds will remain light through the period with speeds of 5 to 10 MPH. High temperatures Sunday through Thursday will reach the mid to upper 70s with some places possibly getting into the lower 80s. In addition to the warm temperatures, high pressure will keep us dry with no rain chances and mostly cloud-free skies with the exception of a few passing clouds from time to time.

Yack

FIRE WEATHER. 256 PM CDT

Southwest winds should quickly increase later Friday morning into the afternoon. Currently looks like a few hours of peak 20ft winds around 15-20 mph with higher gusts. Current forecasts for minimum afternoon RH values northwest of I-55 are between 30-40 percent, but it is worth noting that set-ups like Friday's forecast set-up can sometime see RH values dropping lower than forecast due to deep mixing and strong winds tapping into dry air above the surface. The 10-hour fuel stick moisture values should remain just above critical thresholds as well, so at this time it appears the threat of reaching red flag criteria is quite low. However, the strong winds, low RH, and antecedent dry conditions should result in a heightened (mainly grass) fire danger, particularly northwest of I-55 across northern Illinois.

- Izzi

AVIATION. For the 00Z TAFs .

A weak lake breeze has stalled in the vicinity of the Chicago terminals causing winds to veer to northerly and north- northeasterly for a time at MDW. The boundary could possibly bring a brief period of light NNE winds under 10kts to ORD over the next hour or two. Winds will then back to light westerly later this evening and will remain as such through the night. Winds will pick up through the morning and afternoon on Friday with SW winds gusting upwards of 25-30kts, primarily between 18Z and 02Z.

An approaching cold front will move through the area Friday evening and provide rain showers as early as 00Z with the highest probability for rain being closer to 03Z over the Chicago terminals. There also appears to be a non-zero chance for thunder Friday evening, however probability was deemed far too low to include in the TAF at this time. Winds will veer to NW with the passing of the front which appears to be around 03Z Saturday for both ORD and MDW. The front will also cause VFR ceilings to lower and thicken up through the day Friday with high MVFR conditions possible within the 03-05Z Saturday timeframe.

Doom

LOT WATCHES/WARNINGS/ADVISORIES. IL . Beach Hazards Statement . ILZ006-ILZ103-ILZ104 until 7 PM Thursday.

IN . Beach Hazards Statement . INZ001-INZ002 until 4 AM Friday.

Lakeshore Flood Warning . INZ001-INZ002 until 7 PM Thursday.

LM . Small Craft Advisory . nearshore waters until 1 AM Saturday.



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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
BHRI3 - Burns Harbor, IN 10 mi88 min N 6 G 8 63°F 1014.6 hPa
CMTI2 - 9087044 - Calumet, IL 12 mi50 min N 2.9 G 5.1 1012.7 hPa
JAKI2 15 mi128 min NNE 6 G 8 64°F
45170 19 mi28 min NW 16 G 21 5 ft
45198 19 mi38 min NW 3.9 G 7.8 63°F 64°F5 ft47°F
CNII2 19 mi113 min NNE 8 G 15 64°F 44°F
MCYI3 - Michigan City, IN 22 mi48 min WNW 15 G 17 63°F 1013.7 hPa42°F
OKSI2 22 mi128 min ENE 2.9 G 2.9 63°F
45174 36 mi28 min N 1.9 G 5.8 65°F6 ft1012.6 hPa
45026 - St. Joseph, MI 42 mi28 min NW 18 G 29 60°F 61°F5 ft1013.7 hPa47°F

Wind History for Calumet Harbor, IL
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Last
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W10
G17
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G18
W7
G14
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G10
W10
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G11
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N13
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G15
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G26
N15
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N16
G22
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G19
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N17
G25
N17
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SE10
G14
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G18
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G23
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G20
S14
G22
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G20
S12
G16
S8
G11
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G10
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G11
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G7
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G19
NW8
G13
N9
G16
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G12
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G11
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G12
N14
G18
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G17
N11
G18
N10
G14

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Gary Regional Airport, IN7 mi83 minNNE 610.00 miFair63°F45°F52%1014.2 hPa
Lansing Municipal Airport, IL16 mi73 minN 010.00 miFair63°F42°F46%1014.2 hPa
Valparaiso Porter County Municipal Airport, IN23 mi72 minNNW 410.00 miMostly Cloudy64°F42°F45%1014.3 hPa
Chicago, Chicago Midway Airport, IL24 mi75 minNW 810.00 miA Few Clouds67°F33°F29%1013.5 hPa

Link to 5 minute data for KGYY

Wind History from GYY (wind in knots)
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Last 24hrN20
G30
N20
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G27
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G28
NW19
G25
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NW13
G26
NW12
G26
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G26
NW12
G26
NW11NW8NW9NW9N10N8N6N6
1 day agoN14N14N14N15
G18
NE14
G22
N17
G24
NE17
G23
NE17
G23
NE12
G22
NE13
G19
S4
G25
NE16
G25
N14
G21
N17
G24
NE12
G20
NE15
G26
--NE20N25
G40
N20
G40
NW15
G30
NW15
G30
NW15
G30
NW20
G30
2 days agoSE13S15--S8
G15
S12
G17
S10
G17
S10
G17
S6S3SW8S3SW4SW4CalmN11CalmCalmN7N12N10N17NW12NW12N10

Tide / Current Tables for
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NOTE: This section has been updated as of 1/26/2021. If the image you are expecting is not showing, please let me know. You may use the EDIT function to update your location.
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