Monday, September27, 2021
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Marine Weather and Tides
Johns, NE

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 7:34AMSunset 7:32PM Monday September 27, 2021 10:55 PM CDT (03:55 UTC) Moonrise 10:08PMMoonset 1:13PM Illumination 58% Phase: Waning Gibbous; Moon at 21 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 272352 AFDLBF

Area Forecast Discussion National Weather Service North Platte NE 652 PM CDT Mon Sep 27 2021

SYNOPSIS. Issued at 337 PM CDT Mon Sep 27 2021

H5 analysis this morning had an area of closed low pressure straddling the New Mexico/Arizona border. North of this feature, a low amplitude ridge extended north from northern Wyoming into northern portions of Saskatchewan and Manitoba. West of this ridge, low pressure was located just east of the southeastern Alaska panhandle. A trough of low pressure extended south of this feature to approximately 700 miles west off of the coast of northern California. East of the ridge, closed low pressure was located over central Quebec with a trough extending south of this feature into New England. At the surface, high pressure was anchored over the northern Great Lakes with a weak frontal boundary draped across northeastern Nebraska into eastern South Dakota. Winds were variable across the area this afternoon with easterly winds from southwestern into northeastern Nebraska, southerly winds in the central and northern Sandhills and southwesterly winds in the eastern Panhandle. Temperatures as of 2 PM CDT, under mostly clear skies, ranged from 88 at O'Neill to 94 at Valentine.

SHORT TERM. (This evening through Tuesday night) Issued at 337 PM CDT Mon Sep 27 2021

Precipitation chances are the main forecasting challenge over the next 36 hours. For tonight, the H5 low mentioned above, will track northeast into south central Colorado. North and northeast of this feature, a surface trough of low pressure will deepen overnight. Southerly winds will increase toward Tuesday morning and increased moisture, will lead to warmer low temperatures tonight. Forecasted lows will be in the lower to middle 50s, which was 3-5 degrees cooler than the NBM guidance. Tuesday will be windy and warm across the area as low pressure deepens off to the northwest of the forecast area. Mixed winds tomorrow indicate some gust potential up to 30 MPH. Fortunately enough low level moisture will flow into the area, keeping the area from reaching critical fire weather criteria. With good mixing, temps will reach into upper 80s to around 90 tomorrow. This is slightly cooler than the last couple of days and reflects the slightly increased relative humidity across the area. By early Tuesday evening, a surface trough will begin to track east into eastern Colorado. The latest CAM's do initiate some weak and ragged convection across SW Nebraska and NW Kansas after 00z Wednesday with no convective signatures before that time. That being said, have delayed the onset of isolated pops in the southwestern forecast area until 00z Wednesday. Overnight weak mid level lift will lift north into central and north central Nebraska. As this lift transitions northeast, it will encounter slightly more favorable moisture for showers and weak thunderstorms. Given the diurnal timing of this lift overnight, not expecting significant coverage of showers and storms. That being said, have limited pops to the 20 to 30 percent range overnight.

LONG TERM. (Wednesday through Monday) Issued at 337 PM CDT Mon Sep 27 2021

On Wednesday, a strong cold front will enter far northwestern Nebraska around daybreak, traversing the western half of the forecast area by midday. This feature will then approach central and eastern Nebraska Wednesday afternoon into the evening hours. As the front encounters decent low level moisture along and east of highway 83, a line of showers and thunderstorms is expected to initiate midday along this route and slowly track east with the front into Wednesday night. In advance of the front, model PWAT's reach 1-1.5 inches Wednesday afternoon with surface dew points well into the mid and upper 50s. With mid level flow parallel to the front, we could see some training issues and heavy rain potential in the eastern forecast area Wednesday evening. Given this area has been very dry over the past 6 months, ie. Garfield, Wheeler, Holt and Boyd counties, am not thinking there will be much of a flash flood threat ATTM. Precipitation chances will continue into Friday as a persistent mid level trough of low pressure remains west of the area. Beyond Friday, there are some indications in the mid range models of a persistent area of low pressure aloft over the northern plains into the weekend and early next week. If this were to verify, increased precipitation chances would result. Stay tuned on that one.

AVIATION. (For the 00Z TAFS through 00Z Tuesday evening) Issued at 651 PM CDT Mon Sep 27 2021

Dry conditions are expected through the next day. The only major aviation concern will be some strong winds Tuesday afternoon with gusts up to 20 to 25 knots.

LBF WATCHES/WARNINGS/ADVISORIES. None.

SYNOPSIS . Buttler SHORT TERM . Buttler LONG TERM . Buttler AVIATION . Kulik


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Ainsworth Regional Airport, NE10 mi60 minSSE 1010.00 miFair73°F50°F45%1011.8 hPa

Link to 5 minute data for KANW

Wind History from ANW (wind in knots)
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Last 24hrW3W4CalmW4W3SW3CalmW7CalmCalmCalmCalmSW3SW6S7SE10
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1 day agoS7S11SW10SW11S11S12S11SW11SW9SW5SW6W8NW8NW7NW6NW8NW7N9
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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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