Abstract: In the four years before the U.S. Army Signal Corps weather program banned the use of the word ?tornado? in its forecasts starting in 1886, Sgt. John P. Finley headed up a program to document and study local storms, including ...

Abstract: Apparent interactions between ducted gravity waves and preexisting mesocyclones are investigated. Preliminary analyses of Weather Surveillance Radar-1988 Doppler (WSR-88D) observations from several cases reveal that the ...

Abstract: n this paper, an objective analysis of spatial tornado risk in the United States is performed, using a somewhat different dataset than in some previous tornado climatologies. The focus is on significant tornadoes because ...

Abstract: Ducted gravity waves and wake lows have been associated with numerous documented cases of ?severe? winds (>25 m s?1) and wind damage. These winds are associated with the pressure perturbations and transient mesoscale ...

Abstract: This study uses data from a microwave profiling radiometer (MPR), along with 915-MHz wind profiler, Doppler radar, and surface data to quantify the kinematic and thermodynamic effects of two wave features, an undular bore ...

Abstract: The ?impedance relation? between the wind perturbation within an ageostrophic atmospheric disturbance and its pressure perturbation and intrinsic propagation speed has been in use for decades. The correlation between wind ...

Abstract: he kinematics and thermodynamics of wake lows have been extensively examined in the literature. However, there has been relatively little focus on the widespread, sometimes very strong winds associated with wake lows. Some ...

Abstract: On 6 May 2007, an intense atmospheric undular bore moved over eastern Iowa. A ?Webcam? in Tama, Iowa, captured dramatic images of the effects of the bore and associated gravity waves on cloud features, because its viewing ...

Abstract: A visually impressive undular bore moved across much of Iowa on 2 October 2007, and video animations were captured by numerous Webcams. The bore was sampled very well by Doppler radar at close range, and also by the ...

Abstract: The electromagnetic pulses (EMPs) associated with two lightning flashes on 22 July 2008 in central Alabama produced audible clicking sounds. These clicks were observed almost simultaneously with the lightning flashes, but ...