Friday, March5, 2021
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Marine Weather and Tides
Johns, NE

Version 3.4
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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 7:08AMSunset 6:40PM Friday March 5, 2021 12:57 PM CST (18:57 UTC) Moonrise 1:21AMMoonset 10:55AM Illumination 54% Phase: Third Quarter Moon; Moon at 22 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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7 Day Forecast for Marine Location Near Johns, NE
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location: 42.73, -100     debug


Area Discussion for - North Platte, NE
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FXUS63 KLBF 051722 AFDLBF

Area Forecast Discussion National Weather Service North Platte NE 1122 AM CST Fri Mar 5 2021

UPDATE. Issued at 354 AM CST Fri Mar 5 2021

Will go ahead and hoist a dense fog advisory for parts of ncntl Nebraska. This is based on satellite and NDOR camera shots.

SHORT TERM. (Today through Saturday) Issued at 336 AM CST Fri Mar 5 2021

A backdoor cold front across ncntl Nebraska this morning will be the focus for areas of fog. The models have been backed down on the wrn extent of the front and fog development. The latest model blend indicates the fog will remain east of highway 83.

Nearly full sun conditions are expected by 18z today and throughout the day Saturday. The temperature forecast leans on the bias corrected guidance which was warmer than the straight guidance. Temperatures aloft at h850mb warm a degree or two today and again Saturday. Highs in the mid to upper 60s are in place today and upper 60s to lower 70s are in place Saturday. H850mb temperatures rise to around 10C this afternoon and then to around 11-12C Saturday.

LONG TERM. (Saturday night through Thursday) Issued at 336 AM CST Fri Mar 5 2021

The models are in very good agreement dropping a weak Pacific cold front into wrn and ncntl Nebraska Sunday but this front is expected to have only a modest impact on the temperature forecast. The models all show h700mb temperatures falling a couple of degrees Sunday but h850mb temperatures continue their gradually rise toward 15C Sunday through Tuesday. Temperatures were marked up a few degrees Sunday and Monday for highs around 70. There are indications in the models that a long wave trof will drop into the wrn U.S. spurring an increase in winds aloft across the Colorado which could lead to the formation of mountain cirrus. If these clouds form, they could partially disrupt the daytime heating cycle across Nebraska. The temperature forecast Sunday through Tuesday is modest for this reason.

A lead short wave will move through the Central Plains Tuesday night and Wednesday pulling cooler air into wrn and ncntl Nebraska. Temperatures aloft cool about 15C at both the h850mb and h700mb levels putting an end to the protracted spell of mild weather.

Rain and snow chances are in place for this front and a second reinforcing front Wednesday as well as Thursday and Friday. The rain and snow chances are 20 percent throughout this period for this forecast as WPC suggested little or no measureable precipitation from these disturbances across wrn and ncntl Nebraska. The predictability of the system Tuesday night and Wednesday is moderate. The GFS and ECM ensembles both track a disturbance through SD which could brush nrn Nebraska with light rain and snow. Beyond Wednesday, these ensemble solutions suggest the disturbances are poorly focused.

AVIATION. (For the 18Z TAFS through 18Z Saturday afternoon) Issued at 1122 AM CST Fri Mar 5 2021

Mostly clear skies and generally light/variable winds will keep VFR through tonight for western and north central Nebraska. Potential exists for another round of fog invof KONL Saturday morning, while south/southwest surface winds begin to strengthen after sunrise.

FIRE WEATHER. Issued at 336 AM CST Fri Mar 5 2021

A Fire Weather Watch is in effect Saturday afternoon which includes all zones. The watch assumes the recent snow and rain across Colorado and KS will have little impact on the dryness of the air moving into Nebraska from those regions.

The fire weather watch area of concern is west of highway 183 where precipitable water falls to 0.25 inches or less Saturday. The blended model forecast plus bias correction suggested dew points in the lower to mid 20s and sustained south winds of 20 to 23 mph, which is very close to 500m AGl winds shown in the models. Gusts to 30 to 35 mph should develop given winds at 850-750mb are 25 to 30 kts and the NAM and GFS soundings agree on a mixing height around 750mb.

LBF WATCHES/WARNINGS/ADVISORIES. Fire Weather Watch from Saturday afternoon through Saturday evening for NEZ204-206-208>210-219.



UPDATE . CDC SHORT TERM . CDC LONG TERM . CDC AVIATION . Snively FIRE WEATHER . CDC


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Ainsworth Regional Airport, NE10 mi63 minE 510.00 miFair60°F32°F35%1024.7 hPa

Link to 5 minute data for KANW

Wind History from ANW (wind in knots)
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Last 24hrSE3SE8SE5SE4SE7SE6SE6E6E5SE4CalmCalmCalmCalmW3W4W3CalmS4SW4W4CalmCalmS3
1 day agoSW4S6SW9SW6W5CalmCalmN5N6CalmCalmCalmCalmCalmW5W4W3W3CalmW3CalmCalmE5E7
2 days agoNW16
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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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