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Short Citation:
Office for Coastal Management, 2023: Weather Radar Impact Zones,

Item Identification

Title: Weather Radar Impact Zones
Status: Completed
Publication Date: 2015-09-01

These data represent an inventory of the national impacts of wind turbine interference with NEXRAD radar stations. This inventory was developed by the NOAA Radar Operations Center (ROC) to establish variable zones that delineate the possible impacts that wind turbines may have on radar operations. The inventory scheme includes four zones that take in to account terrain, distance, and the number of elevation angles impacted. ROC requests various degrees of consultation with the developer depending on the zone. No Build - No wind turbines permitted Mitigation Zone - Significant impacts likely Consultation Zone - Significant impacts possible Notification Zone - Impacts not likely


To support ocean planning activities pursuant to the Executive Order Regarding the Ocean Policy to Advance the Economic, Security, and Environmental Interests of the United States, the Energy Policy Act, the National Environmental Policy Act, the Rivers and Harbors Act, and the Coastal Zone Management Act.

Supplemental Information:

Bureau Code: 006:48, Program Code: 006:055


Theme Keywords

Thesaurus Keyword
Global Change Master Directory (GCMD) Science Keywords
ISO 19115 Topic Category
ISO 19115 Topic Category
None Doppler
None Renewable energy planning

Spatial Keywords

Thesaurus Keyword
Global Change Master Directory (GCMD) Location Keywords
None Territorial Sea
None United States of America

Physical Location

City: Charleston
State/Province: SC

Data Set Information

Data Set Scope Code: Data Set
Maintenance Frequency: None Planned
Entity Attribute Overview:

siteIdentifier, siteName, impactZone

Distribution Liability:

Data Set Credit: NOAA NEXRAD Radar Operations Center

Support Roles

Point of Contact

CC ID: 1097458
Date Effective From: 2021
Date Effective To:
Contact (Organization): Office for Coastal Management (OCM)
Address: 2234 South Hobson Avenue
Charleston, SC 29405-2413


Currentness Reference: Publication Date

Extent Group 1

Extent Group 1 / Geographic Area 1

CC ID: 868752
W° Bound: -166.234711
E° Bound: 145.033035
N° Bound: 65.807668
S° Bound: 13.231009

Extent Group 1 / Time Frame 1

CC ID: 868751
Time Frame Type: Discrete
Start: 2015-09-01

publication date

Spatial Information

Spatial Representation

Representations Used

Grid: No
Vector: Yes
Text / Table: No
Stereo Model: No
Video: No

Vector Representation 1

CC ID: 1192768
Curve Object Present?: Yes

Reference Systems

Reference System 1

CC ID: 1192769

Coordinate Reference System

CRS Type: Geographic 2D
EPSG Code: EPSG:4269
EPSG Name: NAD83
See Full Coordinate Reference System Information

Access Information

Security Class: Unclassified
Data Use Constraints:

For coastal and ocean planning

Distribution Information

Distribution 1

CC ID: 1121206
Download URL:
Description: Data Registry

Data Quality



Horizontal Positional Accuracy:

Compiled to meet 10 meters horizontal accuracy at 95% confidence level

Completeness Report:


Conceptual Consistency:

These data are logically consistent



Radar Impact Zones

CC ID: 868743
Contact Role Type: Originator
Contact Type: Organization
Contact Name: NEXRAD Radar Operations Center
Extent Type: Discrete
Extent Start Date/Time: 2015-07-01
Citation URL:
Citation URL Name: Source Online Linkage
Citation URL Description:

URL where the source data were originally accessed.

Source Contribution:

Original shapefiles were provided by ROC, and were combined and condensed by NOAA OCM.

Process Steps

Process Step 1

CC ID: 868744

1) Original source data was provided by NOAA Radar Operations Center

2) Import 4 shapefiles into a file geodatabase

3) Project 4 feature classes into NAD83

4) Update attribute names to siteID and siteName

5) Add impactZone field to each feature class

6) Populate the fields so that GREEN = Notification Zone, YELLOW = Consultation Zone, ORANGE = Mitigation Zone and RED = No Build Zone

7) Dissolve each feature class based on siteID, siteName, and impactZone, unselecting multi-part features

8) Integrate each feature class at 1 foot tolerance to clean up most of the slivers in the data

9) Dissolve each feature class again based on siteID, siteName, and impactZone, unselecting multi-part features

10) Erase RED from ORANGE and Merge the new hollow ORANGE with RED

11) Union this new ORANGE-RED, and split and merge overlaps in the Mitigation Zone only

12) Erase the new ORANGE-RED from YELLOW and Merge the new hollow YELLOW with ORANGE-RED

13) Union this new YELLOW-ORANGE-RED, and split and merge overlaps in the Consultation Zone only

14) Erase the new YELLOW-ORANGE-RED from GREEN and Merge the new hollow GREEN with YELLOW-ORANGE-RED

15) Union this new GREEN-YELLOW-ORANGE-RED, and split and merge overlaps in the Notification Zone only

16) Delete from the No Build Zone features: Camp Humphreys, Kadena AB, Kunsan AB, Lajes AB and Langley Hill

17) Select by Attributes where siteID = 'PAHG', and populate so that all features have siteName = 'Kenai FAA (RDA1)'

18) Integrate new feature class at 20 feet tolerance to further clean up data slivers

19) Check geometry and project data into WGS 1984 Auxiliary Sphere

Process Date/Time: 2015-07-01 00:00:00

Child Items

Rubric scores updated every 15m

Rubric Score Type Title
Entity Weather Radar Impact Zones

Catalog Details

Catalog Item ID: 57239
GUID: gov.noaa.nmfs.inport:57239
Metadata Record Created By: Jesse Brass
Metadata Record Created: 2019-08-20 09:40+0000
Metadata Record Last Modified By: SysAdmin InPortAdmin
Metadata Record Last Modified: 2023-05-30 18:09+0000
Metadata Record Published: 2019-08-20
Owner Org: OCM
Metadata Publication Status: Published Externally
Do Not Publish?: N
Metadata Last Review Date: 2019-08-20
Metadata Review Frequency: 1 Year
Metadata Next Review Date: 2020-08-20