20260323
11584400
1.0
FALSE
NOAA_Sed
-
-
Relationship
-
FFRA_500_Year_NOAA_Sed
Relationship
002
Geographic
GCS_WGS_1984
Angular Unit: Degree (0.017453)
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20260223
16064800
20260223
16064800
150000000
5000
dataset
20260223
File Geodatabase Table
Esri ArcGIS 13.3.0.52636
NOAA_Sed
This table represents the total number of historic flash flood record sites with recorded (non-zero) monetary damages or fatalities located.
<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN STYLE="text-decoration:underline;">FFRA_Grid</SPAN><SPAN>: This is a foreign key that relates to the Unique_ID field in the FFRA_Grid table. </SPAN></P><P><SPAN STYLE="text-decoration:underline;">NOAA_SED_Total</SPAN><SPAN>: Represents the total number of historic flash flood sites with recorded (non-zero) monetary damages or fatalities located within the pixel. This is a priority dataset that reflects historic flooding and corresponding damage or fatalities that would benefit from an outdoor emergency flood warning system.</SPAN></P><P><SPAN STYLE="text-decoration:underline;">NOAA_SED_500_Year_Total</SPAN><SPAN>: Represents the total number of historic flash flood sites with recorded (non-zero) monetary damages or fatalities located within the 500-Year floodplain within the pixel. This is a priority dataset that reflects historic flooding and corresponding damage or fatalities that would benefit from an outdoor emergency flood warning system.</SPAN></P><P><SPAN STYLE="text-decoration:underline;">NOAA_SED_500m_of_500_Year</SPAN><SPAN>: Represents whether the NOAA SED point is within 500 meters of a 500-Year floodplain.</SPAN></P></DIV></DIV></DIV>
This data was generated by AtkinsRéalis, using the National Oceanic and Atmospheric Administration (NOAA) National Weather Service (NWS) Storm Events Database (SED).
NOAA SED
<DIV STYLE="text-align:Left;"><P STYLE="font-size:16ptmargin:0 0 11 0;"><SPAN>S NOAA SED data is provided in point location format, historic flash flooding events may extend beyond the pixels identified as containing the NOAA SED point.</SPAN></P><P STYLE="font-size:16ptmargin:0 0 11 0;"><SPAN>The FFRA is provided for the 30-county area at a spatial resolution of 1-kilometer by 1-kilometer for better computational efficiency as well as to align with input data with the coarsest resolution among those that were used in this study. In addition, the selection of the 1-kilometer by 1-kilometer pixel grid for processing FFRA can avoid confusion about the intent of the product – a finer resolution may give a false impression about the precision or intent of this study. This study is not intended to site sirens as part of outdoor warning siren systems but to identify flash flood-prone areas that warrant sirens. FFRA with a resolution of 1x1 kilometer can adequately serve as foundational information for identifying flash flood-prone areas that warrant sirens given the audible radius for outdoor warning sirens typically ranging from approximately 1 to 2 miles.</SPAN></P></DIV>
0
EPSG
6.2(3.0.1)
NOAA_Sed
Table
83551
OBJECTID
OBJECTID
OID
4
0
0
Internal feature number.
Esri
Sequential unique whole numbers that are automatically generated.
FFRA_Grid
FFRA_Grid
String
100
0
0
NOAA_SED_Total
NOAA_SED_Total
Integer
4
0
0
NOAA_SED_500_Year_Total
NOAA_SED_500_Year_Total
Integer
4
0
0
NOAA_SED_500m_of_500_Year
NOAA_SED_500m_of_500_Year
String
1
0
0