Transition of Radar Refractivity to Operational Radars. Interested parties: NCAR, McGill University, NEXRAD Office of Science and Technology, Federal Aviation Administration, and University participants??. OS&T Briefing, 6 April 2004. REFRACT T.
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Interested parties: NCAR, McGill University, NEXRAD Office of Science and Technology, Federal Aviation Administration, and University participants??
OS&T Briefing, 6 April 2004
Refractivity Experiment For H2O Research And Collaborative operational Technology Transfer
Forecasting Challenge:Tracking the “pockets” of boundary layer moisture so critical for convection initiation and growth.
Moisture gradients and convergence boundaries associated with thunderstorm development, June 12, 2002
Install refractivity on the national network of radars
TV Radar (Local Station)
Products: CAPE, CIN
LI, Precipitable Water,
Refractivity Experiment For H20 Research And
Collaborative operational Technology Transfer
λ = 5 cm
PT = 250 kw
0.5° pencil beam
λ = 10 cm
PT = 1000 kw
1.4° x 5° fan beam
VDRAS Boundary Layer Winds
New equationAssimilation of Refractivity into VDRAS
High Resolution Land Data Assimilation System (HRLDAS)
Refractivity Hourly HRLDAS Evaporation (mm)
Collaborative studies with Fei Chen
25 May 2002
Broad WNW-ESE refractivity and daily N gradient observed.
Mimics (reflects?) climatological moisture gradient in the area.
Lesser variability in along-wind direction than across:
Refractivity on S-Pol’s RVP8
Prototype development on TDWR and ASR-9
ORDA (RVP8) installation
Prototype installation and testing on NSSL’s KOUN
Prototype installation and testing on ROC’s KCRI
Operational Radar Refractivity Test
VDRAS convergence field at z=0.187 km
Results from IHOP June 12 case study
Z= 0.562 km
Oklahoma Panhandle – IHOP2002
Would like to see similar by-pass filter maps for selected NEXRAD radar sites.
Cheryl Stephenson and Dave Zittel at ROC have been contacted.
OKC TDWR TESTBED SITE
50 km range ring