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<p style='margin-top:0px; margin-bottom:1.5rem; font-family:"Avenir Next W01", "Avenir Next W00", "Avenir Next", Avenir, "Helvetica Neue", sans-serif; font-size:16px;'><span style='font-family:inherit; font-weight:bold;'>Dates of Images:</span></p><p style='margin-top:0px; margin-bottom:1.5rem; font-family:"Avenir Next W01", "Avenir Next W00", "Avenir Next", Avenir, "Helvetica Neue", sans-serif; font-size:16px;'><span style='font-family:inherit;'>July 4, 2025</span></p><p style='margin-top:0px; margin-bottom:1.5rem; font-family:"Avenir Next W01", "Avenir Next W00", "Avenir Next", Avenir, "Helvetica Neue", sans-serif; font-size:16px;'><span style='font-family:inherit; font-weight:bold;'>Date of Next Image:</span></p><p style='margin-top:0px; margin-bottom:1.5rem; font-family:"Avenir Next W01", "Avenir Next W00", "Avenir Next", Avenir, "Helvetica Neue", sans-serif; font-size:16px;'><span style='font-family:inherit;'>None Expected</span></p><p style='margin-top:0px; margin-bottom:1.5rem; font-family:"Avenir Next W01", "Avenir Next W00", "Avenir Next", Avenir, "Helvetica Neue", sans-serif; font-size:16px;'><span style='font-family:inherit; font-weight:bold;'>Summary:<br /></span></p><p><span style='color:#404040;'>All imagery is for July 4, 2025. The GEOS-FP meteorology data, depending
on the product, are available in real time. The IMERG Late precipitation data
are available within 12 hours. The following are the descriptions, per layer.</span></p><p style='text-indent:-.25in;'></p><ul><li><span style='color:#404040;'><i>Total Column
Water Vapor</i> from GEOS5 FP 2d time-averaged single level
diagnostics, in (kg/m^2). Together with winds at 850 mb, this layer manifests
convergence and elevated amounts of water vapor over Texas. These amounts are
comparable to what can be seen over the Tropical Depression Chantal, located off the east coast of Florida
at that time.</span></li><li><span style='color:#404040;'><i>UV850.07.04.2025</i> reports wind field at 850 mb, from GEOS5 FP 2d
time-averaged single level diagnostics. The wind field explains the advection and
consecutively convergence of water vapor over the parts of Texas known as the “Flash
Flood Alley”</span></li><li><span style='color:#404040;'><i>Total Daily
Precipitation</i> from IMERG Daily Late dataset, in (inch), for July 4. It
should be noted that IMERG effectively represents 10-km spatial
averaging and hence cannot be compared with extremes observed by local rain
gauges.</span></li><li><span style='color:#404040;'><i>Day Equivalent</i> displays a</span>ccumulated precipitation for July 4, from IMERG Late, expressed as
expected daily precipitation for July, based on 1998-2024 base period. It can
also be called "daily equivalent" - values like "30" mean
that amounts equivalent to expected 30 days precipitation were received.</li><li><i>1 Day Ranking</i> displays the ranking of accumulated precipitation on July 4, 2025. Rankings are shown as percentiles in each grid cell, comparing to the values of July observations in the corresponding grid cell from the base period 1998-2024. Areas in gray show where record daily accumulations occurred on that day, not seen in the 27 years of the base period.</li></ul><div><b>Suggested Use</b></div><div>The wind vector field can be overlayed with the water vapor to understand the convergence of large amounts of water vapor over Texas. The wind field also manifests strong persistent ridging (the clockwise circulation), east from the event, and that ridging played major role in the stalling of the weather disturbance. The extreme amounts of precipitation align with the extremes in the total column water vapor. Precipitation amounts equivalent to normally expected 30-45 days were received actually for less than a day, in fact for about 12 hours, upstream from Kerrville over the Guadalupe River. </div><div><br /></div><div><b>Resolution</b></div><div><div>Spatial: 0.1 ° x 0.1 °</div><div><br /></div></div><div><b>Sensor</b></div><div><div><i>Input precipitation data from:</i></div><div>Huffman, G.J., E.F. Stocker, D.T. Bolvin, E.J. Nelkin, Jackson Tan (2024), GPM IMERG Late Precipitation L3 1 day 0.1 degree x 0.1 degree V07, Edited by Andrey Savtchenko, Greenbelt, MD, Goddard Earth Sciences Data and Information Services Center (GES DISC), Accessed: July 5, 2025, 10.5067/GPM/IMERGDL/DAY/07 </div><div><br /></div><div><i>Input winds and water vapor data is at 0.3x0.25 (lon,lat) deg resolution, from:</i></div><div><a href='https://opendap.nccs.nasa.gov/dods/GEOS-5/fp/0.25_deg/assim/tavg1_2d_slv_Nx' rel='nofollow ugc' target='_blank'>https://opendap.nccs.nasa.gov/dods/GEOS-5/fp/0.25_deg/assim/tavg1_2d_slv_Nx </a></div><div>Rienecker, M.M., M.J. Suarez, R. Todling, J. Bacmeister, L. Takacs, H.-C. Liu, W. Gu, M. Sienkiewicz, R.D. Koster, R. Gelaro, I. Stajner, and J.E. Nielsen, 2008. The GEOS-5 Data Assimilation System - Documentation of Versions 5.0.1, 5.1.0, and 5.2.0. Technical Report Series on Global Modeling and Data Assimilation, 27.<br /><br /><b>Credits:</b></div><div><div>GPM data acquired from NASA Goddard Earth Sciences Data and Information Services Center (GES DISC). Data from Original imagery and statistical analysis by Dr. A. Savtchenko, NASA/GSFC/ADNET, Code 619.</div><div style='font-weight:bold;'><br /></div><div><b>Esri REST Endpoint:</b></div><div><b><br /></b></div><div>See URL to the right</div><div><br /></div><div><b>WMS Endpoint:</b></div><div><b><br /></b></div><div><a href='https://maps.disasters.nasa.gov/ags03/services/texas_flood_202507/GPM_Analysis/MapServer/WMSServer' rel='nofollow ugc' target='_blank'>https://maps.disasters.nasa.gov/ags03/services/texas_flood_202507/GPM_Analysis/MapServer/WMSServer</a></div><div><br /></div><div><b>Data Download:</b></div></div><div style='font-weight:bold;'><br /></div></div><div><a href='https://maps.disasters.nasa.gov/download/gis_products/event_specific/2025/texas_flood_202507/gpm_analysis/' rel='nofollow ugc' target='_blank'>https://maps.disasters.nasa.gov/download/gis_products/event_specific/2025/texas_flood_202507/gpm_analysis/</a></div> |