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NOTE: The date of this change has changed.
The new date is September 13th, 2022 at 4:00 PM EDT
Zone Changes
Effective 4 PM EDT, Wednesday, September 13, 2022, four county public forecast zones for the National Weather Service Northern Indiana office (IWX) will be reconfigured into different zones. Please read the overview sections below for details or if you prefer, jump to the images or table below.
Overview (public zones)
The National Weather Service Northern Indiana office (IWX) will add 4 new county segments within our land area for the County Warning Area (CWA).
Complete Service Change notification is available online.
In Michigan
In Indiana
Zone Changes
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 Figure 2: New zone alignment changes. |
Justification
Climatologically, several counties across northern Indiana and southwest Michigan are affected by lake effect snow events, depending on prevailing wind direction off lake Michigan. This climatology of lake effect snows provides unique boundaries that can assist in dividing the county into additional zones that will more accurately represent forecast weather and expected hazards.
| Current Zone Name / Current UGZ (Z) | New Public Zone Name / New UGZ (Z) |
| Berrien (MIZ077) | Northern Berrien (MIZ177) Southern Berrien (MIZ277) |
| La Porte (INZ003) | Northern La Porte (INZ103) Southern La Porte (INZ203) |
| St. Joseph (INZ004) | Eastern St. Joseph (INZ104) Western St. Joseph (INZ204) |
| Kosciusko (INZ016) | Northern Kosciusko (INZ116) Southern Kosciusko (INZ216) |
| Product Name | WMO Header | AWIPS ID |
|
Special Weather Statement |
WWUS83 KIWX | SPSIWX |
|
Zone Forecast Product |
FPUS53 KIWX | ZFPIWX |
|
Hazardous Weather Outlook |
FLUS43 KIWX | HWOIWX |
|
Non-Precipitation Watch/Warning/Advisory |
WWUS73 KIWX | NPWIWX |
|
Winter Weather Watch/Warning/Advisory |
WWUS43 KIWX | WSWIWX |
|
Area Forecast Matrices |
FOUS53 KIWX | AFMIWX |
|
Point Forecast Matrices |
FOUS53 KIWX | PFMIWX |
|
Fire Weather Message |
FNUS53 KIWX | FWFIWX |
|
Fire Weather Watch/Red Flag Warning |
WWUS83 KIWX | RFWIWX |
|
Flood Watch/Warning/Advisory |
WGUS63 KIWX | FFAIWX |
|
Hydrologic Outlook |
FGUS73 KIWX | ESFIWX |
|
Hydrologic Statement |
FGUS83 KIWX | RVSIWX |
|
Hydrologic Summary |
SRUS43 KIWX | RVAIWX |
|
Daily River and Lake Summary |
FGUS53 KIWX | RVDIWX |
|
Public Information Statement |
NOUS43 KIWX | PNSIWX |
|
Area Forecast Discussion |
FXUS63 KIWX | AFDIWX |
|
Air Quality Alert |
AEUS73 KIWX | AQAIWX |
|
Surf Zone Forecast |
FZUS53 KIWX | SRFIWX |
|
Coastal Hazard Message |
WHUS43 KIWX | CFWIWX |
If you are affected by these changes, take the appropriate action so your system(s) recognize the new zone (Z) Universal Geographic Codes (UGC) and the new zone alignments.
Shape Files
Updated public and fire zone map shapefiles are available for download
at: https://www.weather.gov/gis/PublicZones
The proposed changes to the IWX zone boundaries have been closely coordinated with local partners and customers to be ready for implementation on September 12th, 2022.
If you have any questions concerning this change, please contact:
|
Michael Lewis |
Kimberly McMahon |
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