2008 “PRE-Season” In Review: A Comparison of Tropical Cyclones Fay, Hanna, and Ike with Regards to Predecessor Rainfall Event (PRE) Development Michael L. Jurewicz, Sr. NOAA/NWS, Binghamton, NY Northeast Regional Operational Workshop November 5-6, 2008
64
Embed
Michael L. Jurewicz, Sr. NOAA/NWS, Binghamton, NY Northeast Regional Operational Workshop
2008 “PRE-Season” In Review: A Comparison of Tropical Cyclones Fay, Hanna, and Ike with Regards to Predecessor Rainfall Event (PRE) Development. Michael L. Jurewicz, Sr. NOAA/NWS, Binghamton, NY Northeast Regional Operational Workshop November 5-6, 2008. Fay. Fay Overview. - PowerPoint PPT Presentation
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
2008 “PRE-Season” In Review: A Comparison of Tropical
Cyclones Fay, Hanna, and Ike with Regards to Predecessor
925 mb heights (dam), θe (K), and 200 mb winds (shaded, m s-1)
Center of composite TC
24-Hour QPE Through 1200 UTC, 20 Aug.
Fay’s Direct Rainfall
Radar Mosaic, 2100 UTC, 20 Aug.
Parcel Trajectories
Red – About 925 mbBlue – About 700 mbGreen – About 500 mb
700 mb Analysis, 1200 UTC, 21 Aug.
LFay
Ridge Axes
24-Hour QPE Through 1200 UTC, 21 Aug.
Fay’s Direct Rainfall
Disorganized Convection
Radar Mosaic, 1800 UTC, 21 Aug.
Parcel Trajectories
Red – About 925 mbBlue – About 700 mbGreen – About 500 mb
700 mb Analysis, 1200 UTC, 22 Aug.
L
Fay
Ridge Axes
24-Hour QPE Through 1200 UTC, 22 Aug.
Still Disorganized Convection
Fay’s Rainfall
Radar Loop – 20 Aug. to 24 Aug.
A Classic Null-Case
Fay produced tremendous rainfall across parts of the Southeastern U.S. Several day totals of 20”+ in parts of FL Due to the direct impacts of Fay’s rainfall shield
and her slow movementPRE development not observed
Expansive mid-level ridge was in place; nearly enveloped Fay
Precipitation maxima stayed tightly clustered around the circulation center
Hanna
Hanna Overview
Hanna came ashore as a Category 1 Hurricane near the NC/SC border around 0600 UTC, 6 Sept.
Synoptic Back-drop: Large western Atlantic ridge and central U.S.
troughiness Deep southerly flow regime over the eastern states