4.8.1.4 Wind shear is not included in the METAR/SPECI code form in the U.S remarks. This difference is also applicable to Table A3.2, METAR and SPECI.
4.8.1.5 Sea.surface temperature, the state of the sea and state of the runway are not provided in the METAR/SPECI code form in the U.S. remarks. This difference is also applicable to Table A3.2, METAR and SPECI.
APPENDIX 4 Technical specifications related to aircraft observations and reports
3.1.4 The United States MWOs do not issue special air reports.
APPENDIX 5 Technical specifications related to forecasts
1.2.2 Forecast visibility increments used consist of 1/4 mile from 0 (zero) to 1 mile, 1/2 mile from 1 to 2 miles, and 1 mile above 2 miles. Note: miles are statute miles.
1.2.3 Practices require forecast of non.convective low.level wind shear within 2,000 feet of the ground in the Optional Group. The forecast consists of WS (wind shear); heights of the wind shear in hundreds of feet; and wind speed and direction above the wind shear height, using METAR and TAF coding regulations.
1.2.4 The United States does not use CAVOK and NSC in the TAF. This difference is also applicable to Table A5.1, Template for TAF. The non.application of the use of NSC also applies to App 5. 1.3.1 i)
1.3.1 e) Change groups and amendment criteria below 1/2 statute mile (800 meters) are not used. This difference is also applicable to Table A5.1, Template for TAF.
1.3.1 j) The 100.foot (30 meter) change group and amendment criterion is not used. This difference is also applicable to Table A5.1, Template for TAF.
1.3.2 The United States does not use the change indicator “BECMG”. This difference is also applicable to Table A5.1, Template for TAF and to other subsequent sections including 1.3.3 and 1.3.4 where BECMG is referenced.
1.4 The United States does not use “PROB 40” in the TAF. “PROB 30” will not be used in the first nine (9) hours of every TAF’s valid period, including amendments. This difference is also applicable to Table A5.1, Template for TAF. Note also that Military TAFs do not use the “PROB” groups.
4.1 i) Practice is not to include thunderstorms information in Area Forecasts. See difference filed for Part I 6.6 that the United States does not provide the GAMET but does provide an Area Forecast.
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