A system crossing the Intermountain West today will continue to bring areas of moderate snowfall from the central Sierra Nevada to the Northern Rockies. Gusty winds and low relative humidity will bring critical fire weather to parts of southern New England and Hawaii. Read More >
Overview
Idalia strengthened to a tropical storm about 150 miles SE of Cancun, Mexico on Sunday, August 27th. Idalia then tracked almost due north for 2.5 days and strengthened to a major hurricane Tuesday night/early Wed AM (8/29-30). Idalia made landfall as a Category 3 hurricane by Keaton Beach, FL during the morning of August 30. At the same time, a moderately strong late summer cold front was approaching the region from the north while ~1020mb high pressure built over the Great Lakes. The front crossed the region during the evening of 8/30 to the early morning on 8/31. Tropical Storm Idalia began to interact with the front as it moved off of the northeast South Carolina coast early on 8/31/2023, then continued to track east-northeast through the day. Sustained Tropical Storm winds were observed along the immediate Currituck County coastline, with tropical storm wind gusts reported into Hampton Roads. A peak wind gust of 52 kt was reported from the Third Island Station in the Lower Chesapeake Bay. This station is 52 ft high. In addition, water levels at 2-2.5 MHHW caused some minor beach and dune erosion from Cape Henry south, with some minor coastal flooding in southside Hampton Roads. In addition, water levels in Edenton, NC (on the north side of the Albemarle Sound) rose to nearly 0.6 ft above minor flood thresholds as the northeast wind pushed water toward the western side of the sound. Also, water levels in Westover, NC (Bertie County) rose to 3.28 ft above NAVD88 (although this is below flood stage according to NC FIMAN). See "Tidal Flooding" section for detailed hydrographs from the event. Appreciable rain amounts were confined to far SE VA and NE NC, where 1 to locally 4 inches of rain fell. Flooding issues were minor as rain rates were not that high and antecedent conditions were dry in the areas that received the most rain.
Tidal Flooding
Selected Hydrographs
Duck, NC (Eastern Currituck County) | Edenton, NC (Southern Chowan County) | Westover, NC (SE Bertie County) | Lynnhaven, VA (VA Beach on the Chesapeake Bay) |
Photos
Coming Soon
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Radar/Satellite
Selected Loops
Loop of 0.5° Reflectivity from 11:30 PM on 8/30 to 1:30 PM on 8/31 in ~30 minute increments | Loop of IR Satellite from the 8/29 at 8 PM EDT to 8/31 at 7 PM EDT in 1 hour increments |
Rain/Wind Reports
Public Information Statement National Weather Service Wakefield VA 622 PM EDT Thu Aug 31 2023 ...PRECIPITATION REPORTS... Location Amount Time/Date Lat/Lon Edenton 4.3 SE 3.55 in 0700 AM 08/31 36.01N/76.55W Edenton 7.4 ESE 2.74 in 1100 AM 08/31 36.02N/76.48W Hertford 2.49 in 0530 PM 08/31 36.11N/76.43W Edenton 2.24 in 0530 PM 08/31 36.02N/76.57W Edenton 1.0 NNW 2.05 in 0700 AM 08/31 36.07N/76.61W Hertford 2.04 in 0530 PM 08/31 36.16N/76.32W Elizabeth City 12.1 SE 1.95 in 1200 PM 08/31 36.17N/76.07W Edenton 0.5 NE 1.95 in 0800 AM 08/31 36.06N/76.60W Point Harbor 0.2 WSW 1.89 in 0700 AM 08/31 36.08N/75.80W Elizabeth City 1.78 in 0513 PM 08/31 36.35N/76.28W Windsor 1.5 ESE 1.76 in 1241 PM 08/31 35.99N/76.92W Hertford 5.2 SSE 1.72 in 0700 AM 08/31 36.12N/76.43W Hertford 6.0 SSE 1.70 in 0700 AM 08/31 36.11N/76.42W Hertford 4.2 N 1.62 in 0700 AM 08/31 36.24N/76.48W Virginia Beach 6.0 WNW 1.58 in 0700 AM 08/31 36.78N/76.14W Elizabeth City 7.7 SSW 1.53 in 0700 AM 08/31 36.19N/76.25W 3 SSE Northwest 1.52 in 0530 PM 08/31 36.52N/76.18W Elizabeth City Airport 1.51 in 0454 PM 08/31 36.27N/76.18W 1 NNE Rockyhock 1.51 in 0530 PM 08/31 36.20N/76.69W 3.1 E Windsor 1.48 in 0517 PM 08/31 36.02N/76.89W Elizabeth City 1.0 W 1.46 in 0900 AM 08/31 36.30N/76.24W Elizabeth City 0.8 NW 1.38 in 0800 AM 08/31 36.30N/76.23W Grandy 0.6 E 1.35 in 0600 AM 08/31 36.24N/75.87W Elizabeth City 1.8 SE 1.31 in 0800 AM 08/31 36.28N/76.19W Elizabeth City 5.1 SSE 1.27 in 0700 AM 08/31 36.22N/76.20W Tyner 3.1 NNW 1.27 in 0700 AM 08/31 36.28N/76.62W Moyock 0.7 N 1.25 in 0929 AM 08/31 36.53N/76.18W Elizabeth City 2.6 W 1.21 in 0700 AM 08/31 36.30N/76.27W Edenton 13.3 NNW 1.20 in 0800 AM 08/31 36.23N/76.70W South Mills 1.19 in 0430 PM 08/31 36.44N/76.33W Edenton 10.6 NNW 1.18 in 0800 AM 08/31 36.19N/76.70W Hertford 0.3 S 1.06 in 0800 AM 08/31 36.18N/76.47W Currituck 1.05 in 0525 PM 08/31 36.40N/76.02W Chesapeake 7.3 NE 1.00 in 0800 AM 08/31 36.75N/76.21W Gatesville 3.7 ENE 1.00 in 0800 AM 08/31 36.44N/76.70W
--------------------------------------------------------------------- Public Information Statement National Weather Service Wakefield VA 608 PM EDT Thu Aug 31 2023 ...HIGHEST WIND REPORTS... Location Speed Time/Date Lat/Lon Third Island 60 MPH 0752 AM 08/31 37.04N/76.08W Chesapeake Light Tower 53 MPH 0845 AM 08/31 36.90N/75.71W Cape Henry 50 MPH 0835 AM 08/31 36.93N/76.01W Cape Henry, VA 50 MPH 0830 AM 08/31 36.93N/76.01W 3.0 E Knotts Island (WEATHER 47 MPH 0750 AM 08/31 36.52N/75.87W Sandbridge 47 MPH 0831 AM 08/31 36.70N/75.93W 6 NW Cape Henry 47 MPH 0836 AM 08/31 37.00N/76.09W Lynnhaven Inlet Light 2 46 MPH 0736 AM 08/31 36.92N/76.09W Norfolk Intl Airport 45 MPH 0818 AM 08/31 36.90N/76.20W Poquoson River Light 45 MPH 0711 AM 08/31 37.16N/76.38W Rudee Inlet 45 MPH 0644 AM 08/31 36.83N/75.97W New Point Comfort 44 MPH 0611 AM 08/31 37.33N/76.27W Oceana NAS Souce 44 MPH 0754 AM 08/31 36.82N/76.02W Rappahannock Light 44 MPH 0724 AM 08/31 37.54N/76.02W Elizabeth City Airport 43 MPH 0726 AM 08/31 36.27N/76.18W Willoughby Deguassing Statio 43 MPH 0724 AM 08/31 36.98N/76.32W Middle Ground Lighthouse 43 MPH 0757 AM 08/31 36.95N/76.39W 5 NE Plum Tree Island Refuge 43 MPH 0806 AM 08/31 37.20N/76.27W Thimble Shoals 42 MPH 0825 AM 08/31 37.05N/76.26W South Norfolk Jordan Bridge 41 MPH 0654 AM 08/31 36.81N/76.29W Norfolk NAS Cham 41 MPH 0651 AM 08/31 36.92N/76.27W 8 NW Cape Henry 41 MPH 0800 AM 08/31 37.03N/76.08W Poquoson 40 MPH 0817 AM 08/31 37.11N/76.32W Tangier Sound Light 40 MPH 0840 AM 08/31 37.79N/75.97W 2 E Stingray Point 40 MPH 0642 AM 08/31 37.57N/76.26W
Tropical Cyclone History
See the NHC graphics archive for a detailed loop of Idalia's track along with the associated advisories.
Idalia Wind History (from NHC) |
Environment
Synoptic summary.
Loop of WPC Surface Analysis from 8/29 at 12z/8 AM EDT to 9/1 at 00z (8/31 at 8 PM EDT) | Loop of WPC 500mb Analysis from 8/29 at 12z/8 AM EDT to 8/31 at 12z/8 AM EDT |
Near-storm 925mb maps
8/31 12z/8 AM NAM Analysis 925mb Height/Wind | 8/31 12z/8 AM NAM Analysis 925mb Height/Wind |
Near-storm 850mb maps
8/31 12z/8 AM NAM Analysis 850mb Height/Wind | 8/31 8 AM NAM Analysis 850mb Height/Wind |
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