Area Forecast Discussion
Issued by NWS Raleigh/Durham, NC
Issued by NWS Raleigh/Durham, NC
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645 FXUS62 KRAH 080651 AFDRAH Area Forecast Discussion National Weather Service Raleigh NC 250 AM EDT Mon Jun 8 2026 .WHAT HAS CHANGED... * No significant changes from earlier forecasts. && .KEY MESSAGES... As of 250 AM Monday... 1) Continued hot today. After a brief break in the heat Tue, another round of dangerous heat will return starting Wed, peaking Thu/Fri and lasting into next weekend. 2) High confidence in scattered showers/storms today across the west and south. Scattered showers and storms are possible mainly in the Piedmont late Tue/Wed, then chances increase for daily convective precip areawide for late week through the weekend. Amounts and coverage remain uncertain, however. && .DISCUSSION... As of 250 AM Monday... KEY MESSAGE 1... Continued hot today. After a brief break in the heat Tue, another round of dangerous heat will return starting Wed, peaking Thu/Fri and lasting into next weekend. Above normal temps will persist today, with 850 mb temps still in the 90th percentile, 500 mb heights in the 75th, and low level thicknesses 10-15 m above normal, all ahead of the approaching backdoor front. This front is being propelled by shortwave troughing digging off the New England coast, which is drawing a cooler surface high now centered over the Upper St. Lawrence Valley SSW down the Mid Atlantic coast and into N and E NC. It will take much of the day for this air mass to work into our NE as the front slowly settles toward the SW, so still expect another hot day, although the thicker and more opaque high clouds with sct-bkn high-base cu will reduce insolation, yielding highs a bit lower than yesterday, 90-96. With these consecutive days of high heat, people are urged to remain extra cautious by staying in shade or AC as much as possible, staying hydrated, and limiting time in direct sun. As the front settles further into the CWA across our W and S, the expected dip in thicknesses and greater cloud cover overall, highs Tue should be less hot, with highs closer to normal, in the mid 80s to around 90. But as this front dissipates and the surface high shifts off the Carolina coast toward Bermuda on Wed, deep ridging will build anew over the interior Southeast, and confidence is high that temperatures will rebound back to well above normal. Thicknesses are projected to rebound to 10-20 m above normal by Thu/Fri, supporting highs both days in the mid to upper 90s over much of the area, perhaps reaching 100F in spots. These highs (and warm overnight lows mostly in the 70s) Thu/Fri may approach or exceed records. The NWS experimental probabilistic Heat Risk shows a 60-90% chance of reaching the Major category (level 3 of 4) over much of central NC Thu/Fri, suggesting significant impacts for all populations without adequate cooling or hydration. It should be noted, however, that if scattered afternoon and evening convection becomes more widespread than expected with greater cloud cover, a few degrees could be shaved off of these late-week temps, particularly from Sat onward when the NBM temps are still quite warm but about a category lower than Thu/Fri. KEY MESSAGE 2... High confidence in scattered showers/storms today across the west and south. Scattered showers and storms are possible mainly in the Piedmont late Tue/Wed, then chances increase for daily convective precip areawide for late week through the weekend. Amounts and coverage remain uncertain, however. A cluster of showers will pass over our extreme NE over the next few hours within a zone of low level confluence just ahead of the front. Then, with increasing PW, low level confluent flow, and higher surface dewpoints along and SW of the incoming front later today, odds are good that we`ll see at least scattered showers and storms starting early-mid afternoon and lasting into the evening, primarily from the W Piedmont SE across the Sandhills to the S Coastal Plain, with lower to no convective coverage further NE. This is corroborated by recent CAM runs which have consistently shown this pattern and timing. Coverage and intensity will be limited by relatively dry and warm mid levels, however. While amounts will be highly variable place-to-place, pockets of higher totals resulting from downpours are possible, and the latest REFS PMM supports this scenario over the Sandhills in particular. The chance for typical diurnally-driven showers and storms will be on the upswing from mid week onward. As is typical with summertime convection, the details remain murky, as activity will be driven by small-scale features with limited predictability at this range. Baggy but amplified troughing early this morning from MN through the lower Miss Valley will shift slowly E through the Great Lakes/OH Valley through Tue before broadening and deamplifying as it moves into the Northeast and Mid Atlantic region through Wed and out over the NW Atlantic by Thu. Mid level ridging behind this wave will allow the intense heat to return, but then a large mid level low wobbling E near the US/Canada border through mid week and into S Ont/Que late week will bring increasing westerly steering flow into the OH Valley and Mid South, helping to support more organized convection as the low level flow opens up from the Atlantic and Gulf later in the week. Above-normal PW largely holds over W NC across the W CWA Tue/Wed, then expands over the entire CWA for Thu and beyond, although values will be just slightly above normal, and the 925-700 mb flow will have enough of a westerly component to perhaps limited coverage. But overall we should see improving coverage of showers and storms by the weekend, when a surface front associated with the aforementioned low aloft approaches from the NW with increasing deep layer bulk shear. && .AVIATION /06Z MONDAY THROUGH FRIDAY/... As of 1210 AM Monday... VFR conditions are expected to hold across central NC over much of the next 24 hrs, although the chance for MVFR cigs increases late (after 04z) at western and southern terminals (INT/GSO/FAY). A backdoor cold front will push gradually into central NC from NE to SW today, with the front finally settling from the Triad SE to the southern coast of NC by mid afternoon, and pushing just to our W and SW after nightfall. Scattered showers and storms are possible after 17z through mid evening along and SW of the front, including at INT/GSO/FAY, with RDU/RWI seeing a much lower chance of a shower later today. Brief downpours, lightning, and gusty winds are possible in and near any storms. Any showers/storms will dwindle by 02z, then there is a good chance of MVFR stratocu formation after 04z. Surface winds will be under 8 kts from the WSW or W shifting to be from the N or NE gradually from north to south through 12z, then will continue to veer to be from the NE then from the E or ESE at 9- 15 kts through the day (with sporadic afternoon gusts to 15-20 kts) until speeds weaken to 10 kts or less by mid evening. Looking beyond 06z Tue, there is a good chance for sub-VFR cigs Mon night through Tue morning across the W and SW including INT/GSO/FAY. INT/GSO have a good chance of seeing a couple of showers/storms mainly 16z-01z Tue, followed by a good chance of sub-VFR cigs across the whole area Tue night through early Wed. Otherwise, VFR conditions are favored, although typical daytime isolated to scattered showers/storms will remain possible through Fri. && .CLIMATE... Record High Temperatures: June 8: KFAY: 101/2008 June 10: KFAY: 99/2008 June 11: KGSO: 98/1914 KRDU: 100/1914 KFAY: 102/1926 June 12: KRDU: 98/2002 KFAY: 99/1926 June 13: KRDU: 100/2002 KFAY: 99/2022 June 14: KGSO: 98/1926 KRDU: 97/1944 KFAY: 100/2022 Record High Minimum Temperatures: June 8: KGSO: 73/2008 KRDU: 75/1899 KFAY: 74/2008 June 9: KGSO: 72/2020 June 10: KRDU: 76/2020 KFAY: 77/2020 June 11: KGSO: 74/2008 KRDU: 74/2008 KFAY: 77/1981 June 12: KGSO: 72/1998 KRDU: 75/1986 KFAY: 76/2016 June 13: KGSO: 73/2015 KRDU: 75/2025 KFAY: 77/1998 June 14: KGSO: 71/2025 KRDU: 79/2022 KFAY: 77/2022 && .RAH WATCHES/WARNINGS/ADVISORIES... None. && $$ DISCUSSION...Hartfield AVIATION...Hartfield CLIMATE..RAH