fig1
Figure 1. Base reflectivity (0.5º tilt) from KTLX (Oklahoma City WSR-88D) at 1024 UTC
19 August 2007, with conventionally plotted METAR and Oklahoma Mesonet surface data.
Thermal quantities in °F.  Wind barbs represent 10 kt (5 m s-1).  
Click here for an animation from 0403-1330 UTC.

 

 

fig2

Figure 2. Track of Erin’s center at 6 h intervals and NHC classification (see legend),
15–19 August 2007 (adapted from Knabb 2008). 

 

fig3

Figure 3. Total rainfall for TC Erin, 18–19 August 2007, per legend.  Max record was 12.81 in
(32.54 cm) near Eakly, OK, within the purple shading. Adapted from Hydrometeorological Prediction Center analysis.

 

fig4

Figure 4.  Oklahoma Mesonet meteorograms from a) Watonga and b) Ft. Cobb, OK, showing sharp pressure fall and strong wind shift between 1000 and
1300 UTC (0300 to 0600 CDT) as eye of redeveloped Tropical Storm Erin passed.  Note gusts between 70–80 mph (31–36 m s-1) at both locations.

 

fig5

Figure 5. Map of severe local storm reports for 1200 UTC 18 August to 1200 UTC 19 August 2007. 
Red paths denote tornadoes translating primarily northward, with F (EF) Scale ratings. 
Blue dots signify convective wind gusts ≥50 kt (25 m s-1) severe criteria, with values in kt.
No hail reports occurred with this phase of Erin’s lifespan. Data courtesy Storm Prediction Center.