The National Weather Service forecast office at Cheyenne WY requested that both the GOES-11 (GOES-West) and the GOES-12 (GOES-East) satellites be placed into Rapid Scan Operations (RSO) to monitor severe convection across their County Warning Area (CWA) on 20 July 2009: SENIOR DUTY METEOROLOGIST NWS ADMINISTRATIVE MESSAGE NWS NCEP CENTRAL OPERATIONS CAMP SPRINGS... Read More
Severe convection developing over eastern South Dakota during the pre-dawn hours on 09 July 2009 exhibited an unusually large and well-defined “enhanced-v” storm top signature on AWIPS images of the GOES-12 10.7 µm IR channel (above) as it produced large hail (up to 2.50 inches in diameter) and damaging winds... Read More
AWIPS images of the 1-km resolution MODIS visible, 11.0 µm IR window, and 3.7 µm shortwave IR channel data (above) showed some interesting differences in the appearance of convective storm tops over the northern and central Rocky Mountain region on 06 July 2009. Note that some portions of the storm... Read More
GOES-12 visible images (above) showed a nice example of convective initiation along an outflow boundary from thunderstorms a few hours earlier across northeastern Iowa on 25 June 2009. This new convection that developed along the outflow boundary produced hail of 1.5 inch in diameter and damaging winds in extreme northern Illinois (just... Read More
