texas_flood_202507/GPM_Analysis (MapServer)

View In: ArcGIS JavaScript ArcGIS Online Map Viewer ArcGIS Earth ArcMap ArcGIS Pro

View Footprint In: ArcGIS Online Map Viewer

Service Description:

Dates of Images:

July 4, 2025

Date of Next Image:

None Expected

Summary:

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.

Total Column Water Vapor 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.
UV850.07.04.2025 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”
Total Daily Precipitation 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.
Day Equivalent displays accumulated 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.
1 Day Ranking 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.

Suggested Use

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.

Resolution

Spatial: 0.1 ° x 0.1 °

Sensor

Input precipitation data from:

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

Input winds and water vapor data is at 0.3x0.25 (lon,lat) deg resolution, from:

https://opendap.nccs.nasa.gov/dods/GEOS-5/fp/0.25_deg/assim/tavg1_2d_slv_Nx

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.

Credits:

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.

Esri REST Endpoint:

See URL to the right

WMS Endpoint:

https://maps.disasters.nasa.gov/ags03/services/texas_flood_202507/GPM_Analysis/MapServer/WMSServer

Data Download:

https://maps.disasters.nasa.gov/download/gis_products/event_specific/2025/texas_flood_202507/gpm_analysis/

Map Name: gpm_analysis

Legend

All Layers and Tables

Dynamic Legend

Dynamic All Layers

Layers:

Description: Dates of Images:July 4, 2025Date of Next Image:None ExpectedSummary: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.Total Column Water Vapor 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.UV850.07.04.2025 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”Total Daily Precipitation 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.Day Equivalent displays accumulated 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.1 Day Ranking 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.Suggested UseThe 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. ResolutionSpatial: 0.1 ° x 0.1 °SensorInput precipitation data from: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 Input winds and water vapor data is at 0.3x0.25 (lon,lat) deg resolution, from:https://opendap.nccs.nasa.gov/dods/GEOS-5/fp/0.25_deg/assim/tavg1_2d_slv_Nx 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.Credits: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.Esri REST Endpoint:See URL to the rightWMS Endpoint:https://maps.disasters.nasa.gov/ags03/services/texas_flood_202507/GPM_Analysis/MapServer/WMSServerData Download:https://maps.disasters.nasa.gov/download/gis_products/event_specific/2025/texas_flood_202507/gpm_analysis/

Service Item Id: a59f6b50c3884a0b8fc08f98411f5279

Copyright Text: 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.

Spatial Reference: 4326 (4326)

Single Fused Map Cache: false

Initial Extent:

Full Extent:

Units: esriDecimalDegrees

Supported Image Format Types: PNG32,PNG24,PNG,JPG,DIB,TIFF,EMF,PS,PDF,GIF,SVG,SVGZ,BMP

Document Info:

Supports Dynamic Layers: true

MaxRecordCount: 2000

MaxImageHeight: 4096

MaxImageWidth: 4096

Supported Query Formats: JSON, geoJSON, PBF

Supports Query Data Elements: true

Min Scale: 0

Max Scale: 0

Supports Datum Transformation: true

Child Resources: Info Dynamic Layer

Supported Operations: Export Map Identify QueryLegends QueryDomains Find Return Updates