COUNTY WARNING AREA SHAPEFILE CHANGE HISTORY: 22 DEC 2023 Effective 05 March 2024 (w_05mr24.*) Per SCN 23-113, Due to adjustments state wide, features may be slightly different in AK DKR ------------------------------------------------ 14 FEB 2023 Effective 08 March 2023 (w_08mr23.*) Per SCN 22-124 Change for LWX in Maryland around the Sassafras River Per SCN 22-123 Changes for American Samoa (WSO PPG) Per SCN 22-128, 22-129, 22-130 Due to removal of lagoons state wide, features may be slightly different in AK for AJK, AFC, AFG DKR -------------------------------------------------------------- 13 Jan 2022 Effective 22 March 2022 Per SCN 21-102 Changes made to AK CWA. DKR --------------------------------------------------------------- 28 SEP 2020 Effective 10 November 2020 Per SCN 20-31 Cecil and Garrett counties and corresponding zones in Maryland now fall under the LWX WFO. DKR ---------------------------------------------------------------- 29 May 2020 The move of Cecil and Garrett county to the LWX CWA has been postponed DKR ------------------------------------------------------------------- Effective 02 June 2020 25 February 2020 (fz02jn20.zip) Per SCN 20- Cecil and Garrett county in Maryland now fall under the LWX WFO. DKR -------------------------------------------------------------------- Effective 03 March 2020 04 Feb 2020 (w_02oc18.zip) Per SNC 19-112 Reconfigure of EKA and STO CWA DKR ------------------------------------------------------------- Effective 02 October 2018 23 July 2018 (w_02oc18.zip) Per SNC 18-73 moved two counties/zones from MEG to LZK. DKR ------------------------------------------------------------------ Effective 11 August 2016 12 July 2016 (w_11au15.zip) Per SCN 16- Land/water areas adjusted in WFO OKX to add Governor's Island ----------------------------------------------------------------------- Effective 5 April 2016 26 February 2016 (w_05ap16.zip) Per SCN 16- CHS zone AMZ330 enlarged - land area modified accordingly. 18 April 2016 (w_05ap16a.zip) Due to vital changes needed for warnings in WFO BUF, Unity Island added to Erie county and land/water areas adjusted. ------------------------------------------------------------------------ Effective 10 November 2015 8 October 2015 Per SCN 15-48 the coastline along in MFR were adjusted. ------------------------------------------------------------------------------------ Effective 16 April 2015 per SCN 15-25 15 April 2015 (w_16ap15.zip) New attributes added to CWA boundary shapefile 8 May 2015 (w_16ap15a.zip) Minor change to LIX/LCH boundary due to adjustment of the St. Mary/Terrebonne Parishes LA boundaries. ---------------------------------------------------------------------------------------- Effective 3 December 2014 per SCN 14-48 17 September 2014 (w_03de14.zip) Counties in BOX and GYX counties switching WFOs. -------------------------------------------------------------------------------------------- Effective 4 June 2014 per SCN 14-33 30 May 2014 (w_04jn14.zip) Land/water interface changed for LWX marine zones; affects land in PHI and AKQ. 20 June 2014 (w_12jn14b.zip) Important fix in BUF to cut off the Salmon River portion of LOZ045 which created bad results when issuing a Special Marine Warning. The land opening for the water in the BUF polygon was filled. --------------------------------------------------------------------------------- Effective 1 April 2014 Per SCN 14-08 27 January 2014 (w_01ap14.zip) Original version New island added in MFL 25 March 2014 (w_01ap14a.zip) Numerous checks for gaps/ovelaps/segment lengths and general cleanup ---------------------------------------------------------------------------------- Effecive 5 February 2014 per SCN 13-76 22 November 2014 (w_05fe14.*) Original Version Per SCN 13- Benton county TN moved from OHX to MEG ---------------------------------------------------------------------------------- Effective 3 December 2013 Per SCN 13-49 12 Novenmber 2013 (w_03de13.zip) Original version Modifications to W Fl coast due to marine zone changes in TBW ----------------------------------------------------------------------------------- Effective 15 August 2013 Per SCN 13-45 15 July 2013 (w_15au13.zip) Original version Land areas modified for AKQ. ------------------------------------------------------------------------------------ Effective 2 April 2-13 Per SCN 13-18 4 March 2013 (w_02ap13.zip) Original version CWA boundary in ILM modified to include new "land" area along coast. ----------------------------------------------------------------------------------- Effective 11 October 2012 Per SCN 12-31 10 September 2012 (w_11oc12.zip) Original version Portion of HGX carved out for expansion of marine zone GMZ335 ---------------------------------------------------------------------------------- 7 May 2010 ----------- (w_07jn12.*) The coastline of Georgetown SC ILM per SCN-12-. Winyah Bay currently in marine zone AMZ256 was clipped out of the marine zone and merged in to the CWA land area. 24 February 2011 ---------------- (w_01de10.*) This version of the shapefile has no boundry/name changes. It is however derived from a new data source (TIGER 2000) and is now at a 1:100,000 resolution resulting in finer detail but larger file size in the .shp portion. 1 June 2009 ----------- (w_07my09.*) Modified Anchorage and Fairbanks boundaries to reflect changes in zones per SCN 0-06. 2 April 2009 ------------- (w_15jl09.*) Boundaries in AKQ, LWX and PHI modifed to incorporate new "land" areas as a result of LWX marine zone changes per 02 October 2008 --------------- (w_03oc08.*) Modified areas in LCH to accomodate new marine zones per SCN 08-44. 28 Febrary 2006 --------------- (w_16mr06.*) In acordance with SCN 05-35, CWA identifier for Key West FL changed from EYW to KEY. 23 December 2004 ---------------- (w_28de04.*) In accordance with SCN 04-57, the counties of Bear Lake and Franklin in the state of ID were transferred from SLC to PIH which resulted in the CWA boundary change. 03 November 2004 ---------------- (w_02nv04.*) Because of the removal of the "land" area of Lake Okeechobee FL was removed, the CWA boundaries of the affected WFOs (MFL and MLB) were affected also. 20 July 2004 ------------ (w_02au04.) In accordance with SCN 04-44 and the reconfiguring of Public Forecast Zones CA 29 and CA 60, the CWA boudary between WFOs SGX and VEF was modified. 29 August 2003 -------------- Boundaries of OHX (Nashville) and HUN (Huntsville) modified because of the transfer of Three counties (Franklin, Moore, and Lincoln, TN) being transferred from OHX to HUN. 01 August 2003 -------------- (w_01au03.*) In accordance with SCN 03- With the zone ownership of NV zone 13 being transferred from VEF (Las Vegas, NV) to LKN (Elko, NV), the boundaries of both offices were modified. 3 December 2002 --------------- (w_10de02.*) Created new CWA area for Huntsville AL (HUN). 1 May 2001 ---------- (w_25ap02.*) The office identifier for WSO Pago Pago, American Samoa has been changed to PPG. 3 December 2001 --------------- (w_03de01.*) Portion of boundary between TWC (Tuscon, AZ) and PSR (Phoenix, AZ) modified due to modification of AZ Public Forecast Zones 28 amd 29. 29 June 2001 ------------ (w_30jn01.*) In response to SCN 01-27, Marengo County AL was transferred from MOB (Mobile AL) to BMX (Birmingham, AL). 24 Jan 2001 ----------- (w_24ja01.*) In TAE's area, an erroneous "gap" at the border of Gulf and Bay Counties, FL, from the Gulf of Mexico to East Bay was repaired. 25 Sep 2000 (w_25se00.*) No changes in this version. 02 Sep 2000 ----------- (w_02se00.*) RIW CWA boundaries extended to include all of Natrona County with the portion of WY zone 64 (CYS) now in WY zone 15. 14 Jun 2000 ----------- (w_05jn00.*) Border of GJT and PUB altered slightly due to adjustment between Hinsdale and Mineral counties and Archuleta and Conejos counties. 23 March 2000 ------------ (w_20mr00.*) Coastline altered slightly in Ventura County, CA. 08 March 2000 ------------ (w_06mr00.*) The CWA boundaries were modified due to the transfer of counties/zones Decatur County, TN from OHX to MEG per SCN 0035 effective 14 March, 2000. 17 November 1999: ----------------- (w_18nv99.*) 1. The CWA boundaries for LSX and DVN were modified due to the transfer of counties/zones Scotland and Clark from LSX to DVN per OM SCN #99-91, effective 30 November 1999 06 October 1999: ---------------- (w_06oc99.*) 1. Adjustments made to PSR zone boundaries at their request which modified CWA border between PSR, FGZ, and TWC. 15 September 1999: ------------------ (w_15se99.*) 1. The county warning areas for BMX, TAE, FFC, and MOB were modified as a result of OM SCNs #99-38r, #99-39r, and #99-40c, all effective September 22, 1999. 30 July 1999: ------------- (w_30jl99.*) 1. Due to the change of ownership of the Florida zones from MFL to EYW, the CWA for both has been updated. 2. Guam CWA modified due to addition of several zones (GUZ005 - GUZ010) and removal of the Northern Marianas from GUZ004. 20 July 1999: ------------- (w_20jl99.*) 1. Due to the change of ownership of the Maine zones from GYX to CAR, the CWA for both has been updated. 15 July 1999: ------------- (w_15jl99.*) 1. CWA boundaries for VEF, PSR, and SGX modified due to adjustment made to Joshua Tree National Park boundary. 2. SJT and MAF CWA boundaries modified due to transfer of Mitchell County, TX, from SJT to MAF per PSN #99-47. 17 June 1999: ------------- (w_17je99.*) Modifcation made to CWA boundaries for PSR, SGX, and VEF as a result of PSR zone boundary changes to CA zones 30 and 32 at request of PSR. 27 April 1999: -------------- Correction: Four northern-most Florida Keys moved from EYW to MFL CWA following consultation with WFOs. 05 April 1999: -------------- Changes: Colorado, Utah Correction: Maine 01 Dec 98: ---------- Reassignment: TN Counties Cumberland & Fentress from MRX to OHX, Bledsoe, Marion & Sequatchie from OHX to MRX. Realignment: STO, REV shape by changing "Ownership" of Lassen National Volcano Park (see zones)