Tuesday, August20, 2019 L-36.com


Marine Weather and Tides
Johns, NE

Version 3.4
NOTICE
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 6:56AMSunset 8:36PM Tuesday August 20, 2019 7:22 PM CDT (00:22 UTC) Moonrise 10:17PMMoonset 10:37AM Illumination 72% Phase: Waning Gibbous; Moon at 20 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 202340
afdlbf
area forecast discussion
national weather service north platte ne
640 pm cdt Tue aug 20 2019

Short term (this evening through Wednesday night)
issued at 258 pm cdt Tue aug 20 2019
the primary forecast challenges through tomorrow deal with
thunderstorms and a modest cooldown. A cold front is currently
draped across the sandhills and will be the focus for convective
development through tonight. High temps tomorrow will likely be
limited to the 70s.

Generally followed a blend of the more aggressive cams for precip
potential and timing, mainly the namnest and href. The environment
is definitely favorable for organized convection with a forcing
mechanism nearby, abundant instability, and some deep layer shear.

Highs near 90 this afternoon coupled with dew points in the 60s to
lower 70s and nearly dry adiabatic lapse rates in the mid levels are
resulting in MLCAPE values of 3000+ j kg. Forecast soundings suggest
keeping at least 1000+ j kg of MUCAPE into the nocturnal hours while
the low level jet develops. Veering winds in the lowest 3km may
support supercells upon convective initiation (early evening),
leading to a large hail threat. Can't completely rule out a tornado,
but the limiting factor may be widespread supportive shear. Deep
layer shear ranges from 20 to 40 kts across the CWA and 0-3km shear
from 5 to 20 kts. The mean cloud layer wind and storm motion almost
mirrors the front position overnight, which will likely turn the
focus to a linear system or at least multicell clusters. Forecast
dcape values of 1000+ j kg also favor damaging wind potential. Will
also need to monitor the torrential rainfall threat. Seasonably high
pwat values coupled with relatively low storm motion and forecast
convective mode may result in a swath of 1" rain totals (and locally
higher). Many locations are reeling with a very wet summer and are
still saturated from storms days ago. Remnants of the potential mcs
should exit the forecast area by 18z Wednesday, but lingering post
frontal thunderstorms will affect western nebraska through the
afternoon. Temperature-wise, trended cooler with MAX temps for
Wednesday with lower mid 70s in the sandhills where cloud cover will
be thickest and upper 70s elsewhere.

Long term (Thursday through Tuesday)
issued at 258 pm cdt Tue aug 20 2019
over the next several days, nebraska lies on the periphery of the
upper ridge centered over the desert southwest and longwave
trough digging into the northern plains. Near the surface, passing
frontal boundaries provide the focus for periodic thunderstorms
to keep the overall wet pattern alive. Clouds precip coupled with
seasonably cool h85 temps around 15c (or lower) will maintain
highs in the 70s for Thursday. Weak WAA in the low levels on
Friday and then a warm front lifting north on Saturday will
rebound temps into the 80s for the weekend.

Aviation (for the 00z tafs through 00z Wednesday evening)
issued at 640 pm cdt Tue aug 20 2019
a broad swath of showers and thunderstorms is expected to track
across most of western and north central nebraska overnight. At
this time, the strongest storms should track across the sandhills
or between the klbf and kvtn terminals. For klbf, thunderstorms
should approach the terminal after 05z with the threat continuing
through 13z Wednesday. After 13z, low ceilings and showers are
expected for Wednesday morning with ceilings below 1000 ft agl.

MVFR ceilings will develop Wednesday afternoon and are forecast
around 1500 ft agl. For the kvtn terminal: the threat for
thunderstorms will be during the 07z to 11z time frame. MVFR
ceilings of 1500 ft agl will develop after 11z, then scatter out
during the mid afternoon Wednesday.

Lbf watches warnings advisories
None.

Short term... Snively
long term... Snively
aviation... Buttler


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Ainsworth Regional Airport, NE10 mi68 minENE 710.00 miFair79°F66°F66%1018.6 hPa

Link to 5 minute data for KANW

Wind History from ANW (wind in knots)
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Last 24hrS9S7S9------W3W3W4--W3NW6NW3N7NE10NE12
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1 day agoE8SE5SE5------S5S6S8S6S7S10S10S11S15
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2 days agoW5NW3N10
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N4CalmCalmCalmCalmCalmE4SE6E5E5

Tide / Current Tables for
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Tide / Current Tables for
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Weather Map and Satellite Images
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GOES Local Image of    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for North Platte, NE (20,4,5,8)
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Ground Weather Radar Station North Platte, NE
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Disclaimer:
The information on this web site has not been checked for accuracy. It is for entertainment purposes only and should be independently verified before using for any other reason. There are five sources. 1) Documents and manuals from a variety of sources. These have not been checked for accuracy and in many cases have not even been read by anyone associated with L-36.com. I have no idea of they are useful or accurate, I leave that to the reader. 2) Articles others have written and submitted. If you have questions on these, please contact the author. 3) Articles that represent my personal opinions. These are intended to promote thought and for entertainment. These are not intended to be fact, they are my opinions. 4) Small programs that generate result presented on a web page. Like any computer program, these may and in some cases do have errors. Almost all of these also make simplifying assumptions so they are not totally accurate even if there are no errors. Please verify all results. 5) Weather information is from numerious of sources and is presented automatically. It is not checked for accuracy either by anyone at L-36.com or by the source which is typically the US Government. See the NOAA web site for their disclaimer. Finally, tide and current data on this site is from 2007 and 2008 data bases, which may contain even older data. Changes in harbors due to building or dredging change tides and currents and for that reason many of the locations presented are no longer supported by newer data bases. For example, there is very little tidal current data in newer data bases so current data is likely wrong to some extent. This data is NOT FOR NAVIGATION. See the XTide disclaimer for details. In addition, tide and current are influenced by storms, river flow, and other factors beyond the ability of any predictive program.