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(LEFT: WSR-88D reflectivity image from Birmingham, Alabama at 2330 UTC on 08Apr98, 30 minutes prior to the tornado that produced an F5 near Birmingham. RIGHT: GOES-10 visible image from 2330 UTC on 08Apr98 corresponding to the radar shown above. A thin cloud line may be seen on the radar image just north of an east-west line of deep convection in central Alabama. Over the next half hour, this line moves north and intersects the convective line that is entering western Alabama at 2330 UTC. Shortly thereafter a mesocyclone and hook-echo develop. There is no sign of this line on any of the GOES-10 imaging channels.)
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Tangential wind at 700mb from aircraft reconnaissance and AMSU retrievals. The average wind difference is 5 m/s from 0 to 200 km.
AMSU temperature retrievals at 350 hPa
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Time series spectrum analysis of percentage area within 2 degrees latitude of the center of Hurricane Bertha (1996) that is colder than -70 C, over the lifetime of the storm. Note very low frequency oscillations (~ 1 day) were removed before the analysis was conducted.
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This figure is an image product generated using all 5 bands of AHVRR, but with emphasis on channel-3A. Note how snow/ice covered ground (white areas) are discriminated from clouds (darker shades), showing the usefulness of this channel for snow/ice mapping.
|Figure 1: RAMM automatic analysis of visible GOES imagery at (19:30, 9:45 and 20:00 UTC, 25 Feb 1999). Both GOES 8 and GOES 10 data are used. Heights were derived from geometric information only, independent of the IR temperature of the clouds. Click on image to enlarge|
|Figure 2: As in Figure 1 but initialized with the NESDIS cloud locations. These clouds were selected in the IR imagery, so no near surface objects were tracked. The upper number is the wind speed in m/sec and the lower number is the height in hectometers. Click on image to enlarge|
|Figure 3 corresponding NESDIS IR cloud heights and Asynchronous Stereo Estimates. Click on image to enlarge|
Hourly climatology imagery (Visible, 3.9, 6.7 and 10.7 micrometer) for December 1998 through February 1999 have been sent to Costa Rica. We are into the second year of data collection and this has afforded the opportunity to compare imagery from both years.
B. Connell visited the RMTC at the University of Costa Rica and the National Meteorological Institute (NMI) in Costa Rica March 8-12. The direction of ongoing and future research activities were discussed with Dr. Jorge Amador (UCR), Master’s student Ileana Mora (UCR), Rosario Alfaro (NMI), Dr. Walter Fernandez (UCR), and Dr. Vilma Castro (UCR). The activities focused on using archived satellite climatology imagery to determine cloud frequency associated with rainfall patterns in various parts of Costa Rica and Central America during various times of the year. Rosario and Walter expressed strong interest in obtaining and applying the satellite-based autoestimator routines for rainfall estimates developed by Dr. Gilberto Vicente and Dr. Rod Scofield.
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This image shows the 1 km visible cloud frequency at 2:00 hour intervals from 1400 UTC to 2000 UTC over Costa Rica for January 1999. The central regions of Costa Rica are very mountainous, with the highest mountains in the southern half of the country. Cloud development patterns are related to the mountains, their elevations, and the level of cloud condensation.
DeMaria, M., D. Hillger, R. Zehr, and B. Connell, 1999: Incorporation of GOES data into an Atlantic tropical cyclone formation parameter. 53rd Interdepartmental Hurricane Conference, February 8-12, Biloxi, MS.
DeMaria, M., F.M. Horsfall, and E.N. Rappaport, 1999: Incorporation of aircraft observations into a statistical hurricane intensity prediction scheme. 23rd AMS Conference on Hurricanes and Tropical Meteorology. January 11-15, Dallas, TX, Amer. Meteor. Soc.
Knaff, J.A., 1999: Tropical cyclone structure change as revealed by one-minute satellite imagery. 23rd
AMS Conference on Hurricanes and Tropical Meteorology. January 11-15, Dallas, TX, Amer. Meteor. Soc., 186-189.
Knaff, J.A. and R.M. Zehr, 1999: Convective asymmetries in mature tropical cyclones associated with
motion and vertical wind shear. 23rd AMS Conference on Hurricanes and Tropical Meteorology. January 11-15, Dallas, TX, Amer. Meteor. Soc., 464-467.
Motta, B.C. and A. Mostek, 1999: A comparison of current national weather service interactive distance learning technology. Reprints, 15th International Conference on IIPS for Meteorology, Oceanography, and Hydrology, 10-15 January, Dallas, TX, Amer. Meteor. Soc., 396-397.
Petersen, W.A., L.D. Carey, S.A. Rutledge, J.C. Knievel, N.J. Doesken, R.H. Johnson, T.B. McKee, T.H. Vonder Haar, and J.F. Weaver, 1999: Mesoscale and radar observations of the Fort Collins flash flood of 28 July 1997. Bull. Amer. Meteor. Soc., 80:2, 191-216.
Watson, D.L. and D.W. Hillger, 1999: RAMSDIS On-Line: A Web-based tool for the satellite data user. CIRA’99 (CIRA Newsletter), 11, Cooperative Institute for Research in the Atmosphere, Fort Collins CO, 4-5.
Zehr, R., 1999: Improving the quantitative assessment of vertical wind shear on tropical cyclone intensity
change, 23rd AMS Conference on Hurricanes and Tropical Meteorology. January 11-15, Dallas, TX, Amer. Meteor. Soc.
Zehr, R.M., M. DeMaria, F. Horsfall, and J. Knaff, 1999: Observational tropical cyclone data archive and research. 53rd Interdepartmental Hurricane Conference, February 8-12, Biloxi, MS.
Campbell, G.G., 1999: Practical satellite cloud heights from shadows. Mon. Wea. Rev.
Campbell, G.G. and J.F.W. Purdom, 1999: Asynchronous stereo height and motion retrieval from satellite observations. J. of Atmos. and Oceanic Technology.
DeMaria, M. and J. Kaplan, 1999: An updated statistical hurricane intensity prediction scheme (SHIPS) for the Atlantic and Eastern North Pacific Basins. Weather and Forecasting.
Hillger, D.W., 1999: Using the new 1.6 µm channel on NOAA-15 in satellite product development. 10th Conference on Atmospheric Radiation, June 28-July 2, Madison, WI, Amer. Meteor. Soc., 4pp.
Landsea, C.W., R.A. Pielke, Jr., A.M. Mestas-Nunez, and J.A. Knaff, 1999: Atlantic basin hurricanes: Indices of climatic change. Climate Change.
Chase, T.N., R.A. Pielke, J.A. Knaff, T.G.G. Kittel, J.L. Eastman, 1999: A comparison of Regional Trends in 1979-1997 depth-averaged tropospheric temperatures. Int. J. Climatol.
Grasso, L.D., 1999: The differentiation between grid spacing and resolution and their application to numerical modeling. Mon. Wea. Rev.
Knaff, J. A. and J. F. Weaver, 1999: A mesoscale low-level thunderstorm outflow boundary associated with Hurricane Luis. Mon. Wea. Rev.
Landsea, C. W. and J. A. Knaff, 1999: How much “skill” did the various forecasting methods available have for the 1997 – 98 El Nino event? 2nd Hayes Symposium on Seasonal and Interannual Climate Change, January 10–5, Dallas, TX
Pielke, R.A., T.N. Chase, T.G.F. Kittel, J.A. Knaff, and J. Eastman, 1999: Analysis of 200 mb wind and 1000-200 mb depth-averaged temperature trends for the period 1958-1997. J. Geophysical Research.
Zajac, B.A. and S. A. Rutledge, 1999: Characteristics of cloud-to-ground lightning activity in the contiguous United States from 1995-1997. Mon. Wea. Rev.
|DeMaria, M.||AMS Annual Meeting, 23rd Hurricane Conf.|
|Zehr, R.||AMS Annual Meeting, 23rd Hurricane Conf.|
|Motta, B.||AMS Annual Meeting, 15th IIPS Conference|
|Knaff, J.||AMS Annual Meeting, 23rd Hurricane Conf.|
|DeMaria, M.||53rd Interdepartmental Hurricane Conference|
|Zehr, R.||53rd Interdepartmental Hurricane Conference|
|Weaver, J.||S. High Plains Severe Weather Conference|
|Bikos, D.||COMET Satellite Meteorology Course|
|Bikos, D.||NWA Doppler Radar Course|
|Motta, B.||NWA Doppler Radar Course|
|Connell, B.||Regional Meteorological Training Center Visit|
|DeMaria, M.||Team Leaders Meeting||3/16 to 19|
|DeMaria, M.||USWRP Science Symposium|
|Zehr, R.||USWRP Science Symposium|
|Motta, B.||COMET Precourse Meeting|
AMS: American Meteorological Society
AMSU: Advanced Microwave Sounding Unit
ARAD: Atmospheric Research and Applications Division
AVHRR: Advanced Very High Resolution Radiometer
AWIPS: Advanced Weather Interactive Processing System
CIMSS: Cooperative Institute for Meteorological Satellite Studies
CIRA: Cooperative Institute for Research in the Atmosphere
COMET: Cooperative Program for Operational Meteorology, Education, and Training
CONUS: Continental U.S.
CSU: Colorado State University
FEMA: Federal Emergency Management Agency
FTP: File Transfer Protocol
GIF: Graphics Interchange Format
GINI: GOES Ingest NOAA-port Interface
GOES: Geostationary Operational Environmental Satellite
GRID: Gridded Data (McIDAS file type)
HRD: Hurricane Research Division
HTML: Hypertext Markup Language
ISTPDS: Integrated Sensor Training Professional Development Series
LDAD: Local Data Acquisition and Dissemination
LTO: Low Level Thunderstorm Outflow
LUT: Look Up Table
McIDAS: Man Computer Interactive Data Access System
NASA: National Aeronautics and Space Administration
NCAR: National Center for Atmospheric Research
NCEP: National Center for Environmental Prediction
NESDIS: National Environmental Satellite Data Information Service
NOAA: National Oceanic and Atmospheric Administration
NPOESS: National Polar-orbiting Operational Environmental Satellite System
NWS: National Weather Service
NWSFO: National Weather Service Forecast Office
OM: Office of Meteorology
OPTORA: Operating Plans and Tasks for the Office of Research and Applications
ORA: Office of Research and Applications
PCGRIDDS: Personal Computer Based Gridded Interactive Display and Diagnostic System
PCI: Principal Component Imagery
POES: Polar-orbiting Operational Environmental Satellite
POP: Product Oversight Panel
PRC: Peoples Republic of China
RAMMT: Regional and Mesoscale Meteorology Team
RAMS: Regional Atmospheric Modeling System
RAMSDIS: Regional and Mesoscale Meteorology Team Advanced Meteorological Satellite Demonstration and Interpretation System
RMTC: Regional Meteorological Training Center
ROLEX: RAMSDIS Online experimental
SMC: Satellite Meteorology Center (Beijing, PRC)
SAB: Satellite Applications Branch
SOCC: Satellite Operations Control Center
SRSO/RSO: Super Rapid Scan Operation/Rapid Scan Operation
SSEC: Space Science and Engineering Center (University of Wisconsin)
TAC: Technical Advisory Committee
TOVS: TIROS Operational Vertical Sounder
USWRP: United States Weather Research Program
UTC: Coordinated Universal Time
VISIT: Virtual Institute for Satellite Integration Training
WMO: World Meteorological Organization
WV: Water Vapor
Y2K: Year 2000