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  • Red/Green/Blue (RGB) images « CIMSS Satellite Blog
    Winter weather No Comments Satellite views of snow cover produced by a strong early season Nor easter November 9th 2012 Suomi NPP VIIRS 0 64 µm visible channel and false color Red Green Blue RGB images The first Nor easter storm of the 2012 2013 winter season as seen on 07 November 2012 MODIS images produced snowfall amounts as high as 13 inches in parts of New Jersey and Connecticut HPC storm summary After the clouds had cleared in the wake of the departing system the areal extent of the remaining snow on the ground which ranged from 1 6 inches at some locations across New Jersey New York Connecticut and Massachusetts was shown in an AWIPS comparison of 375 meter resolution re projected onto a 1 km AWIPS grid Suomi NPP VIIRS 0 64 µm visible channel and false color Red Green Blue RGB images at 17 25 UTC 12 25 PM local time on 09 November 2012 above In the false color VIIRS RGB image snow on the ground was enhanced in shades of pink Note to National Weather Service forecast offices as a part of our participation in GOES R Proving Ground activities CIMSS is able to provide a limited set of VIIRS imagery for display in your local AWIPS via LDM feed Additional detail could be seen in 250 meter resolution MODIS true color and false color RGB images at 18 02 UTC 1 08 PM local time from the SSEC MODIS Today site below In the MODIS false color RGB image the snow cover appeared as shades of cyan MODIS true color and false color Red Green Blue RGB images Posted in MODIS Red Green Blue RGB images Suomi NPP VIIRS Winter weather No Comments High elevation snow cover remaining from Superstorm Sandy November 2nd 2012 MODIS 0 65 µm visible channel and false color Red Green Blue RGB images Cold air and upslope flow on the western side of Hurricane Sandy conributed to some very impressive snowfall totals across parts of the central Appalachain Mountains in the eastern US HPC storm summary Once some of the cloud cover began to clear from the region on 02 November 2012 a comparison of AWIPS images of visible channel data and false color Red Green Blue RGB composites from MODIS at 16 09 UTC or 12 09 PM local time above and again at 17 55 UTC or 1 55 PM local time below revealed the extent of the remaining high elevation snow cover On the false color RGB images created using the 2 1 µm snow ice channel on MODIS and the 1 61 µm snow ice channel on VIIRS as the Green and Blue components of the image composites snow cover appeared as the darker red features which also appeared white on the corresponding visible images Data from the National Operational Hydrologic Information Center observed snow depth model derived snow depth indicated that some sites still had a snow depth in excess of 20 inches

    Original URL path: http://cimss.ssec.wisc.edu/goes/blog/archives/category/redgreenblue-rgb-images (2012-11-14)
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  • Blowing dust in northern Mexico, southwestern Texas, and southeastern New Mexico « CIMSS Satellite Blog
    11 45 µm IR channel images Posted in Air quality Google Earth MODIS Suomi NPP VIIRS No Comments Leave a Reply Click here to cancel reply Name required Mail will not be published required Website Webmaster Follow us on Search for Pages About this site CIMSS Satellite Proving Ground Contact us Mobile users POES AVHRR in AWIPS SatePedia Suomi NPP JPSS Proving Ground VISIT SHyMet Training Topics November 2012 M T W T F S S Oct 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Categories Air quality Antarctic Arctic AVHRR Aviation AWIPS II Calibration Anomalies Cloud Top Cooling Convective Initiation Fire detection Fog detection General interpretation GOES sounder GOES 10 GOES 11 GOES 12 GOES 13 GOES 14 GOES 15 GOES R Google Earth Heavy rain flooding Historical Hydrology Lightning Marine weather McIDAS V Meteosat MODIS MTSAT Other Satellites POES Red Green Blue RGB images Satellite winds Severe convection Suomi NPP Synthetic satellite imagery Training Tropical cyclones VIIRS Volcanic activity Web Map Server What the heck is this Winter weather Other blogs of interest AccuWeather Blogs CIMSS GOES Gallery CIMSS TPARC Support CIRA GOES R Proving Ground Blog EUMETSAT Image Gallery Geographic Information Network of Alaska GOES R and JPSS National Centers Perspective GOES R Fog Product Examples GOES R Hazardous Weather Testbed METSUL blog NOAA NESDIS Operational Significant Event Imagery NSSTC Collaborative Weather Blog PREDICT Field Experiment Blog The GOES R Proving Ground at the Aviation Weather Testbed The Wide World of SPoRT UMBC U S Air Quality The Smog Blog US Severe Weather Blog VIIRS Imagery and Visualization Team Blog VISIT Meteorological Interpretation Weather Channel Blogs Weather Underground Blogs WGN Weather Center Blog Satellite imagery

    Original URL path: http://cimss.ssec.wisc.edu/goes/blog/archives/11837 (2012-11-14)
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  • Air quality « CIMSS Satellite Blog
    accident that closed Interstate 35 near Blackwell Oklahoma MODIS true color image displayed using Google Earth MODIS 0 64 µm visible channel and 11 12 µm IR brightness temperature difference BTD product A comparison of the MODIS 0 64 µm visible channel data with the corresponding 11 12 µm IR brightness temperature difference BTD product above demonstrated that the BTD product did a better job at depicting the broad areal extent of the airborne dust lighter blue to cyan color enhancement at 20 13 UTC 3 13 PM local time There was one pilot report of moderate to severe turbulence over northeastern Oklahoma near the leading edge of the dust plume 19 October Update The MODIS BTD product was then able to follow the movement of the dust plume during the subsequent overnight hours when visible channel imagery was no longer available the plume became more narrow and less dense as it continued to move southeastward across Arkansas and then over northern Mississippi and Alabama by 08 10 UTC 4 10 AM local time on 19 October below MODIS 11 12 µm IR brightness temperature difference BTD product After sunrise on the morning of 19 October the hazy signature of the airborne dust could be seen on GOES 14 0 63 µm visible channel images over the southeastern US below There were pilot reports of flight visibility being restricted to 2 miles at an altitude of 1000 feet over southeastern Tennessee GOES 13 visible image MODIS BTD image and 3 miles at an altitude of 3500 feet over northern Alabama GOES 13 visible image MODIS BTD image GOES 14 0 63 µm visible channel images Posted in Air quality Fire detection GOES 13 Google Earth MODIS Red Green Blue RGB images Suomi NPP VIIRS No Comments VIIRS Day Night Band nocturnal detection of wildfire smoke aloft September 26th 2012 Suomi NPP VIIRS 0 7 µm Day Night Band 11 45 µm IR and IR difference fog stratus product images A comparison of AWIPS images of Suomi NPP VIIRS 0 7 µm Day Night Band 11 45 µm IR and IR difference fog stratus product data above revealed that the Day Night Band DNB can be used for nocturnal detection of dense layers of wildfire smoke aloft in this case over parts of Montana Wyoming North Dakota South Dakota and Nebraska The brighter DNB signal of the elevated smoke layer was not correlated with any features seen on either the IR image or the fog stratus product image at 08 04 UTC 2 04 AM local time on 26 September 2012 The MODIS aerosol optical depth AOD product below showed that high ADO values were found over that region during the afternoon hours 20 UTC on 25 September Forward trajectories from the IDEA I site indicated that the majority of this smoke would be drifting slowly eastward MODIS aerosol optical depth AOD product The hazy signal of this veil of smoke aloft could also be seen on GOES 14 0 63

    Original URL path: http://cimss.ssec.wisc.edu/goes/blog/archives/category/air-quality (2012-11-14)
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  • Google Earth « CIMSS Satellite Blog
    observed that there were a number of pilot reports of moderate to severe turbulence near the western periphery of the cloud shield of Sandy where there were also hints of a transvese banding structure Two notable pilot reports are displayed on Suomi NPP VIIRS 11 45 µm IR and MODIS 6 7 µm water vapor channel images below Suomi NPP VIIRS 11 45 µm IR image with pilot report of severe turbulence MODIS 6 7 µm water vapor channel image with pilot report of moderate turbuence Posted in AVHRR Aviation GOES 14 Google Earth MODIS POES Red Green Blue RGB images Suomi NPP Tropical cyclones VIIRS No Comments Strong winds and blowing dust across Nebraska Kansas and Oklahoma October 18th 2012 Suomi NPP VIIRS 0 64 µm visible channel images AWIPS images of Suomi NPP VIIRS 0 64 µm visible channel data above showed the hazy signature of a dense plume of blowing dust along the southwestern periphery of a large mid latitude cyclone that was centered over Minnesota and Wisconsin on 18 October 2012 Surface winds gusted as high as 73 mph in Nebraska and 56 mph in Kansas reducing visibility to near zero in areas of dense blowing dust An animation of AWIPS 4 panel images of GOES 13 0 63 µm visible channel 6 5 µm water vapor channel 10 7 µm IR channel and 3 9 µm shortwave IR data below click image to play animation showed 1 the evolution of the dense plume of blowing dust on visible imagery as it developed and moved southeastward across Nebraska Kansas and Oklahoma 2 a well defined dry region yellow color enhancement on water vapor imagery that highlighted strong middle tropospheric subsidence that initiated the downward transfer of momentum leading to the subsequent strong winds at the surface and 3 the appearance of wildfire hot spots black to yellow to red color enhancement on the shortwave IR imagery in northeastern Colorado and southwestern Nebraska GOES 13 0 63 µm visible 6 5 µm water vapor 10 7 µm IR and 3 9 µm shortwave IR images click image to play animation An Aqua MODIS true color Red Green Blue RGB image from the SSEC MODIS Today site below showed the tan light brown signature of the most dense portion of the blowing dust plume The blowing dust reduced surface visibility to near zero in a number of areas forcing road closures across parts of Nebraska and Kansas including a multiple vehicle accident that closed Interstate 35 near Blackwell Oklahoma MODIS true color image displayed using Google Earth MODIS 0 64 µm visible channel and 11 12 µm IR brightness temperature difference BTD product A comparison of the MODIS 0 64 µm visible channel data with the corresponding 11 12 µm IR brightness temperature difference BTD product above demonstrated that the BTD product did a better job at depicting the broad areal extent of the airborne dust lighter blue to cyan color enhancement at 20 13 UTC 3 13

    Original URL path: http://cimss.ssec.wisc.edu/goes/blog/archives/category/google-earth (2012-11-14)
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  • Suomi NPP « CIMSS Satellite Blog
    the ground was enhanced in shades of pink Note to National Weather Service forecast offices as a part of our participation in GOES R Proving Ground activities CIMSS is able to provide a limited set of VIIRS imagery for display in your local AWIPS via LDM feed Additional detail could be seen in 250 meter resolution MODIS true color and false color RGB images at 18 02 UTC 1 08 PM local time from the SSEC MODIS Today site below In the MODIS false color RGB image the snow cover appeared as shades of cyan MODIS true color and false color Red Green Blue RGB images Posted in MODIS Red Green Blue RGB images Suomi NPP VIIRS Winter weather No Comments Fog over the southeast US November 5th 2012 VIIRS DayNight Band on Suomi NPP GOES R IFR Probabilities and surface observations Click image to play animation The animation above showing the VIIRS Day Night Band on Suomi NPP as well as the GOES R IFR Probability field that fuses together information from GOES East and the Rapid Refresh is offered as testimonial to the use of the Day Night band in detecting the presence of low clouds The Day Night Band that is night time visible which band uses reflected moonlight as an illumination source and the 6 5 µm water vapor imagery and the traditional brightness temperature difference 10 7 µm 3 9 µm both show the presence of high level cirrus over central and southern Florida This high cloud deck will prevent the traditional fog detection algorithm from returning a useful signal The comparison between the DayNight Band and the IFR probabilities is especially simple using this simple applet Where the IFR Probabilities are large in regions free of cirrus the Day Night band does suggest the presence of clouds As with other methods using satellites to detect fog whether of not the cloud is at the surface is difficult to discern Note that IFR Probabilities are smaller underneath the cirrus clouds Both predictors satellite and Rapid Refresh must show strong signals for the highest IFR probability to occur and that cannot happen underneath a cirrus canopy More examples of the GOES R Fog detection algorithm including a more detailed write up on this Florida case can be found at the Fog Blog A Day Night band image over the southeast with limited fog over coastal South Carolina and northern Florida is here Posted in Fog detection GOES R Suomi NPP VIIRS No Comments Older Entries Webmaster Follow us on Search for Pages About this site CIMSS Satellite Proving Ground Contact us Mobile users POES AVHRR in AWIPS SatePedia Suomi NPP JPSS Proving Ground VISIT SHyMet Training Topics November 2012 M T W T F S S Oct 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Categories Air quality Antarctic Arctic AVHRR Aviation AWIPS II

    Original URL path: http://cimss.ssec.wisc.edu/goes/blog/archives/category/suomi_npp (2012-11-14)
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  • Satellite views of snow cover produced by a strong early season Nor’easter « CIMSS Satellite Blog
    Today site below In the MODIS false color RGB image the snow cover appeared as shades of cyan MODIS true color and false color Red Green Blue RGB images Posted in MODIS Red Green Blue RGB images Suomi NPP VIIRS Winter weather No Comments Leave a Reply Click here to cancel reply Name required Mail will not be published required Website Webmaster Follow us on Search for Pages About this site CIMSS Satellite Proving Ground Contact us Mobile users POES AVHRR in AWIPS SatePedia Suomi NPP JPSS Proving Ground VISIT SHyMet Training Topics November 2012 M T W T F S S Oct 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Categories Air quality Antarctic Arctic AVHRR Aviation AWIPS II Calibration Anomalies Cloud Top Cooling Convective Initiation Fire detection Fog detection General interpretation GOES sounder GOES 10 GOES 11 GOES 12 GOES 13 GOES 14 GOES 15 GOES R Google Earth Heavy rain flooding Historical Hydrology Lightning Marine weather McIDAS V Meteosat MODIS MTSAT Other Satellites POES Red Green Blue RGB images Satellite winds Severe convection Suomi NPP Synthetic satellite imagery Training Tropical cyclones VIIRS Volcanic activity Web Map Server What the heck is this Winter weather Other blogs of interest AccuWeather Blogs CIMSS GOES Gallery CIMSS TPARC Support CIRA GOES R Proving Ground Blog EUMETSAT Image Gallery Geographic Information Network of Alaska GOES R and JPSS National Centers Perspective GOES R Fog Product Examples GOES R Hazardous Weather Testbed METSUL blog NOAA NESDIS Operational Significant Event Imagery NSSTC Collaborative Weather Blog PREDICT Field Experiment Blog The GOES R Proving Ground at the Aviation Weather Testbed The Wide World of SPoRT UMBC U S Air Quality The Smog

    Original URL path: http://cimss.ssec.wisc.edu/goes/blog/archives/11821 (2012-11-14)
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  • TOWARD BERMUDA NATIONAL WEATHER SERVICE RADAR AND SURFACE OBSERVATIONS INDICATE MODERATE TO HEAVY PRECIPITATION TO THE NORTH AND WEST OF THE SURFACE LOW PRECIPITATION IS FALLING IN THE FORM OF RAIN ACROSS SOUTHERN NEW ENGLAND AND LONG ISLAND SNOW IS CONFINED TO INTERIOR NORTHERN NEW ENGLAND A STRONG PRESSURE GRADIENT IS PRODUCING SUSTAINED WINDS OF 15 TO 25 MPH ACROSS NEW ENGLAND WITH GUSTS BETWEEN 40 AND 50 MPH ALONG THE COAST SELECTED STORM TOTAL SNOWFALL IN INCHES FROM 700 AM EST WED NOV 07 THROUGH 900 AM EST THU NOV 08 CONNECTICUT CLINTONVILLE 13 5 HAMDEN 12 0 MONROE 11 5 DANBURY 9 9 NEW HAVEN 9 0 TOLLAND 9 0 BRIDGEPORT 8 0 MANCHESTER 8 0 NEW MILFORD 7 0 GREENWICH 6 0 MILLBROOK 4 5 MASSACHUSETTS SOUTHBRIDGE 8 0 SPENCER 6 4 FOXBORO 5 6 WORCESTER AIRPORT 5 2 NORTH ATTLEBORO 5 0 MAINE HOPE 4 0 PORTLAND 6 WNW 3 5 NEW HAMPSHIRE CHICHESTER 1 SSW 3 0 NEW JERSEY FREEHOLD 13 0 MANCHESTER TWP 12 0 CHEESEQUAKE 7 8 RIDGEFIELD 7 5 NEWARK AIRPORT 6 2 JERSEY CITY 6 0 WASHIGNTON TWP 6 0 MANALAPAN 5 5 HOPEWELL 5 0 TOMS RIVER 4 0 ATLANTIC CITY AIRPORT 2 5 NEW YORK BRONXVILLE 9 5 ALBERTSON 8 0 NORTH VALLEY STREAM 8 0 BAYSIDE 7 9 HOWARD BEACH 6 0 PARKCHESTER 5 0 CENTRAL PARK 4 7 JFK AIRPORT 4 3 ISLIP AIRPORT 4 0 BRONX 2 5 RHODE ISLAND CUMBERLAND 5 0 PROVIDENCE 2 3 SELECTED STORM TOTAL RAINFALL IN INCHES FROM 700 AM EST WED NOV 07 THROUGH 900 AM EST THU NOV 08 MASSACHUSETTS KINGSTON 3 WNW 2 28 EAST FALMOUTH 1 ESE 1 60 HARWICH 3 NW 1 59 YARMOUTH 2 SSE 1 53 SELECTED PEAK WIND GUSTS IN MILES PER HOUR

    Original URL path: http://cimss.ssec.wisc.edu/goes/blog/wp-content/uploads/2012/11/121108_hpc_storm_summary.text (2012-11-14)
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  • GOES-R PG: VIIRS Imagery and Products in D-2D
    used to process VIIRS files there is no preprocess script and subsequently there is no entry in the LDADinfo txt file The VIIRS files are filed in their LDM state compressed on ls1 but moved to px1 for processing and filing This is done by setting and running a cron task at least once hourly which will be done in the following steps It is important to assure this cron task exists and is executing properly or VIIRS products may quickly overwhelm ls1 The process script writes to a file in the log directory data logs fxa As fxa on px1 Create the directory data local localapps VIIRS Copy processVIIRS pl into the new directory and assign executable permissions As root on px1 Add a cron task to etc cron d SITEpx1cron and etc ha d cron d SITEpx1cron As root on px2 Add the same cron task to etc ha d cron d SITEpx1cron in case of a failover Your operations should roughly follow this outline su fxa cd data local localapps Choose the directory you wish mkdir VIIRS mv tmp processVIIRS pl gz VIIRS cd MODIS Move to that directory gunzip processVIIRS pl gz chmod 775 processVIIRS pl su root vi etc cron d SITEpx1cron Make cron change in two files vi etc ha d cron d SITEpx1cron After the first file complete ssh px2 vi etc ha d cron d SITEpx1cron In case px1 fails Page Up vi command to move to bottom of file a vi command to append Enter vi command to add blank line Process VIIRS products from CIMSS SSEC 5 20 35 50 fxa csh c data local localapps VIIRS processVIIRS pl dev null Esc vi command to stop append mode wq vi command to write and quit A zip file of these is available Required AWIPS Customizations Perform the following actions to configure your Advanced Weather Interactive Processing System AWIPS workstations servers For east CONUS WFOs in FXA CUSTOM FILES as fxa should be mounted on any workstation server Append to localDataKeys txt to map product keys to directory locations Append to localDepictKeys txt and modify the 127x color table keys for visualization Append to localImageStyle txt to provide sampling Append to localProductButtons txt to label the menu items Append to localPurgeInfo txt to keep only recent files Append to otherSatMenus txt or dataMenus txt see Known Pitfalls for selection A zip file of these is available For west CONUS WFOs in FXA CUSTOM FILES as fxa should be mounted on any workstation server Append to localDataKeys txt to map product keys to directory locations Append to localDepictKeys txt and modify the 127x color table keys for visualization Append to localImageStyle txt to provide sampling Append to localProductButtons txt to label the menu items Append to localPurgeInfo txt to keep only recent files Append to otherSatMenus txt or dataMenus txt see Known Pitfalls for selection A zip file of these is available For Alaska Region WFOs in FXA CUSTOM FILES as fxa

    Original URL path: http://cimss.ssec.wisc.edu/goes_r/proving-ground/awips/snpp/index.html (2012-11-14)
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