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Mr. Junker started career in meteorology in NESDIS in 1979 and transferred to the Hydormeteorological Prediction Center in 1983. He has been involved in quantitative precipitation forecasting since then. His numerous articles and preprints are listed below. He has given numerous seminars at NWS training courses such as the old National Flash Flood training course and at current courses at COMET (Hyrodmeteorology, Numerical Weather Prediction, and Mesoscale), the National Heavy Precipitation Workshops, AMS and NWA meetings, and at local WFOs and RFCs. He lectured in China as part of the Protocol Agreement with the Peoples Republic of China. He also was involved with the USWRP team looking into the challenges of quantitative precipitation forecasting. Mr Junker is a senior Branch Forecaster who works rotating shifts at the Hydrometeorological Prediction Center at NCEP. He routinely provides outstanding guidance to field forecasters in the area of QPF, heavy snow , flash flood potential and the performance of the NCEP numerical models.
Mr. Junker is an active participant of the NWA and AMS. He has received awards from both the NWA and AMS. He has been a member of several national committees including the U.S. Weather Research Working Group on QPF and has served as the Chair of AMS Committee of Weather and Forecasting. He has served as program chairperson for the 13th and 16th Conferences on Weather Analysis and Forecasting and for the 12th Conference on Numerical Weather Prediction. He is both past Vice-President and President of the NWA and has served as program chairman of several sessions at national meetings.
1991 AMS Special Editors Award, 1991 AMS Award for an exceptional specific prediction of a record breaking Midwestern snowstorm., 1982 NWA Award for Outstanding Achievement in Operational Performance, 1993 modernization award as part of the ETA evaluation team, 1993 received a Dept. of Commerce Award for Unusually Outstanding Performance.
Burtt, Junker, 1976: A typically rapidly developing extratropical cyclone. Mon. Wea. Rev.
Junker and Haller, 1980: Estimation of surface pressures from satellite cloud patterns, Mariners Weather Log.
Junker, 1985: Recognizing characteristic model errors and incorporating them into precipitation forecasts. Sixth Conference of Hydrometeorology at Indianapolis.
Junker, Hoke and Grumm, 1989: Performance of NMC's regonal models, Weather and Forecasting, 4, 368-390.
Junker and Hoke, 1989: An examination of the NGM precipitation forecasts in the presence of moderate-to-strong southerly inflow. Wea. and Forecasting, 5, 333-344.
Mostek and Junker, 1989: Quantitative precipitation verification at the National Meteorological Center. Preprints, Twelfth Conference on Weather and Forecasting, Monterey, CA.
Bohl and Junker, Using climatological favored thickness to locate the axis of heaviest rainfall. Weather Digest, 12, 5-10.
Junker, Bell and Grumm, 1990: Development, maintenance and strengthening of a cyclonic circulation system by coupled jets. Conference of Severe Local Storms, Alberta Canada.
Corfidi, Junker and Glass, 1990: The Louisiana/Mississippi flash flood and severe weather outbreak of 15-16 November 1987. 16th Conference on Severe Local Storms, Alberta Canada.
Junker, Hoke Sullivan, Brill and Hughs, 1992: Seasonal and Geographic Variations in Quantitative Precipitation Predictions by NMC's Nested-Grid Model and Medium-Range Forecast Model. Wea. Forecasting, 7 , 410-429.
Uccelini, Corfidi, Junker, Kocin, and Olson, 1992: Report on the Surface Analysis Workshop Held at The National Meteorological Center 25-28 March 1991. Bull. Amer. Meteor. Soc., 73, 459-472.
Junker, 1993: Why Forecasters Can Improve Quantitative Precipitation Guidance from the Numerical Models. Published as Tech. Procedures Bull. as part of Heavy Precipitation Forecasting Workshop in Pittsburgh.
Junker and Hodges, 1993: ETA Versus LFM Evaluation. 13th Conference of Weather Analysis and Forecasting including Symposium on Flash Floods. 172-175.
Junker, Schneider and Scofield, 1995: The meteorological Conditions associated with the Great Flood of 1993. 14th AMS Conference on Weather Analysis and Forecasting, Dallas TX, (J4) 13-17.
Junker, Schneider and Fauver, 1996: A Comparison of heavy and extreme events during the Great Midwest Flood of 1993. AMS 15th Conference on Weather Analysis and Forecasting.
Schneider, Junker, Eckert, Considine, 1996: The Performance of the 29 km Meso ETA model in support of forecasting at the Hydrometeorological Prediction Center. AMS 15th Conference on Weather Analysis and Forecasting.
Gartner, Baldwin and Junker, 1996: Regional Analysis of Quantitative Precipitation Forecasts from NCEP's early ETA and Meso-ETA Models. AMS 15th Conference on Weather Analysis and Forecasting, 169-171.
Rogers, Black, Deaven, DiMego, Zhao, Baldwin, Junker and Lin, 1995: Changes to the Operational "Early" ETA Analysis/Forecast System at the National Centers for Environmental Prediction. Wea. Forecasting, 11, 391-413.
Olson, Junker and Korty, 1995: Evaluation of 33 years of quantitative precipitation forecasting at NMC. Wea. Forecasting, 10, 498-511.
Junker, N.W. and R. S. Schneider, 1997: Two Case Studies of Quasi-Stationary Convection During the 1993 Great Midwest Flood. Nat. Wea. Digest, 22, 5-17.
Junker, N. W., R. S. Schneider and S. L . Fauver. A study of heavy rainfall events during the Great Midwest Flood of 1993, Accepted for publication in Wea. Forecasting.