Area Forecast Discussion
Issued by NWS Raleigh/Durham, NC
Issued by NWS Raleigh/Durham, NC
Versions:
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
437 FXUS62 KRAH 250625 AFDRAH Area Forecast Discussion National Weather Service Raleigh NC 225 AM EDT Tue Jun 24 2024 .SYNOPSIS... High pressure will build across and offshore the southern Middle Atlantic today, then continue to extend westward across the South Atlantic states through Wednesday. A pre-frontal trough, then weak cold front, will move across NC Thursday and Thursday night. && .NEAR TERM /THROUGH TONIGHT/... As of 955 PM Monday... The 00Z upper air analyses show the H25 trough over the Northeast and mid-Atlantic, while the H5 trough was slightly east, mainly along the East Coast. There is still plenty of moisture evident at H7 and H85, although some drier air was creeping into the northern Piedmont. At the surface, the front has progressed through most of central NC, however there are still some mid 70s dewpoints over the Coastal Plain as of 01Z. Dewpoints elsewhere generally range from mid 60s to mid 60s. The surface high, over OH/PA as of 01Z, should settle ssewd to over WV/VA tonight. The question is if the surface boundary will remain stalled over the Coastal Plain tonight or whether/how far the high will help push it sewd. Where the higher dewpoint air remains, some fog/low stratus will be possible. Otherwise, expect lows mainly in the mid 60s to around 70 degrees, although a few isolated spots could stay a bit above 70. && .SHORT TERM /TUESDAY AND TUESDAY NIGHT/... As of 400 PM Monday... Tuesday will be largely precipitation free across central NC as the trough exits into the Atlantic and is replaced by weak ridging over the Southeast US. Our region will also be under a much drier more stable airmass behind the cold front. Surface high pressure over the Appalachians in the morning will move east into the Atlantic during the day, shifting the low-level flow to a more southerly direction. Thus there will be very little to no change in temperatures from today despite today`s cold frontal passage, with highs again in the lower-to-mid-90s. Where there will be a noticeable difference is the humidity, as dew points will mix out into the upper-50s to lower-60s in the afternoon. So heat indices will be very similar to the air temperatures. The one possible area of precipitation is from Fayetteville south and east, where some CAMS (mainly the HRRR and RAP), show enough instability for a few showers and storms to develop along the sea breeze. But the other CAMS are much less impressed. Given this and the unfavorable upper pattern, only carry slight chance POPs there at this time. Lows Tuesday night will be in the upper-60s to lower-70s. && .LONG TERM /WEDNESDAY THROUGH MONDAY... As of 205 PM Monday... ...Hot Temperatures Will Continue through Next Weekend... ...Seasonable/Climo Rain Chances Return... Heat and humidity increases Wednesday ahead of another approaching weak cold front that will cross the area Wednesday night/early Thursday. Wednesday looks to be the hottest day of the week, with afternoon temps expected to top out between 95-100, and heat indices in the upper 90s NW to 100-105 over central and eastern NC. While some isolated pre-frontal convection is possible Wednesday afternoon/evening, the bulk of central NC will most likely see it`s rainfall from an ana-frontal rain band that will cross the area late Wednesday night and Thursday. There`s a very plausible chance that the front could stall out or quickly lift back north as a warm front on Friday, resulting in additional rain chances. Right now, precipitation amounts looks to be light, with average rainfall amounts expected to be between 0.10-0.25", with some localized heavier amounts. The heat should briefly moderate on Thursday with troughing moving through. However, the subtropical ridge initially centered over the southern Plains will expand eastward into the Southeast Friday and over next weekend, bringing a renewed threat for hazardous heat with heat indices again in the upper 90s NW to 100 to 105 across central and eastern NC. Another cold front, potentially the strongest of the week, is slated to cross the area late Sunday into the day on Monday, and will bring additional rain chances in showers and storms, and another brief stint of cooler, less humid conditions early next week. && .AVIATION /06Z TUESDAY THROUGH SATURDAY/... As of 220 AM Tuesday... While primarily VFR conditions, and a couple of layers of stratocumulus (5-6 thousand ft) and altocumulus (8-10 thousand ft) are expected through this evening, an area of IFR-MVFR ceilings may develop along a cold front that will settle south across sern NC and nrn SC this morning. Associated flight restrictions will be most likely at FAY, followed by RWI and then RDU. Light, generally nely surface winds this morning are forecast to veer to sely/sly today- tonight, as high pressure otherwise builds across and offshore the srn Middle Atlantic. Outlook: Areas of mostly IFR stratus will be possible throughout cntl NC Wed morning and mainly at FAY and RWI Thu morning. A chance of mainly afternoon-evening showers/storms will also return to the forecast for Wed through the weekend, with the relative highest probabilities at FAY/RWI on Thu. Additionally, the development of an Appalachian-lee, nocturnal low-level jet across and offshore the Middle Wed night may result in marginal low-level wind shear in cntl NC during that time. && .CLIMATE... Record High Temperatures: June 26: KRDU: 102/1952 KFAY: 101/1951 June 27: KFAY: 102/1998 June 30: KFAY: 102/2012 Record High Minimum Temperatures: June 25: KRDU: 77/2010 KFAY: 75/1952 June 26: KGSO: 74/2010 KRDU: 76/1902 KFAY: 76/1997 June 27: KGSO: 76/1969 KRDU: 76/1952 KFAY: 77/1998 June 28: KGSO: 76/1969 KRDU: 76/1952 KFAY: 78/1914 June 29: KGSO: 74/2010 KRDU: 78/1914 KFAY: 76/1969 June 30: KGSO: 74/1936 KRDU: 80/1936 KFAY: 79/1936 July 1: KGSO: 77/1970 KRDU: 75/2012 KFAY: 76/1990 && .RAH WATCHES/WARNINGS/ADVISORIES... None. && $$ SYNOPSIS...MWS NEAR TERM...KC SHORT TERM...Danco LONG TERM...CBL AVIATION...MWS CLIMATE...RAH