Area Forecast Discussion
Issued by NWS Blacksburg, VA

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652 FXUS61 KRNK 290603 AFDRNK Area Forecast Discussion National Weather Service Blacksburg VA 203 AM EDT Sun Jun 29 2025 .SYNOPSIS...
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A lingering warm and unstable airmass remains in place through at least Tuesday. A front will move through the region bringing slightly cooler and less humid conditions. Until then, diurnal showers and storms with heavy rain resulting in localized flooding, as well as isolated severe storms causing wind damage.
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&& .NEAR TERM /THROUGH TONIGHT/...
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As of 135 AM EDT Sunday... Key Messages: 1) Thunderstorms are expected again this afternoon and evening. 2) The main threat from storms will be heavy rain, which could lead to localized flash flooding. Very stagnant airmass remain in place over the region. Expecting another round of thunderstorms this afternoon and evening as daytime heating leads to increasing instability. Fog and clouds will give way to partly sunny skies late this morning and into the early afternoon, which should result in increasing instability. As with the past few days, storms will begin to develop by early afternoon and will likely continue into the evening and overnight hours. Could have a few strong to severe storms, mainly due to increasing PWATs, leading to an increased wet microburst potential. Main threat today will be heavy rain from slow moving storms, which will once again pose a threat for localized flash flooding. Secondary threat will be damaging winds.
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&& .SHORT TERM /MONDAY THROUGH WEDNESDAY NIGHT/...
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As of 200 AM EDT Sunday... Key Messages: 1. Line of thunderstorms expected Tuesday into Wednesday. 2. Slightly cooler and drier for Wednesday. Troughing aloft starts to move over the eastern US by the beginning of the work week, while an associated cold front tracks towards the Mid Atlantic from the Ohio Valley. Monday will be another hot and humid day, with high temperatures few degrees above normal, and showers and thunderstorms are expected during the afternoon and evening with diurnal heating, and fade after sunset. However, on Tuesday, more thunderstorms will develop during the early to mid afternoon hours, first over the mountains, and then tracking over to the Piedmont by Tuesday evening. With more shear ahead and along the front, between 15 to 20 knots, storms look to be more organized, eventually becoming more of a line as the storms move eastward, with the main surface low tracking into southeastern Canada by Wednesday morning. PWATs through the beginning of the work week are also in the 99th percentile, relative to climatology, so storms could produce heavy rain and result in localized flash flooding, especially for areas that have received plenty of rain during the past few days. Surface high pressure pushes into the region following the frontal passage, which will bring slightly cooler temperatures, but, more noticeably, a drop in dewpoints and thus humidity, and Wednesday looks to be dry for most.
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&& .LONG TERM /THURSDAY THROUGH SATURDAY/...
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As of 200 AM EDT Sunday... Key Message: 1. Increasing humidity and temperatures by the weekend. Behind the frontal passage, surface high pressure will become more established overhead for the second half of the work week, which will keep shower and thunderstorm probabilities lower. However, the high looks to push off into the Atlantic by the end of the week and beginning of the weekend, with easterly return flow bringing increased moisture back into the region. Ridging aloft also starts to develop over the southern US upstream of the trough over the eastern US, which looks to edge its way towards the area by the weekend. Increasing heights aloft through the weekend will lead to increasing temperatures. At this time, these positive 500mb anomalies do not look to be as great as earlier this past week, associated with the widespread heat wave over the east, so not thinking unusual heat at this time.
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&& .AVIATION /06Z SUNDAY THROUGH THURSDAY/...
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As of 145 AM EDT Saturday... Generally VFR outside of any developing fog. Could see some additional sub-VFR conditions through daybreak as fog fills in. Will see quick improvements back to VFR after sunrise. Expecting another round of hit and miss popup thunderstorms this afternoon and evening. Main threat will be heavy rain, which could result in brief vsby reductions. A wet microburst threat also exists with a few of the stronger storms. Could have lingering rain and thunderstorms beyond 00Z/8PM tonight, but should begin to see any rain/storm activity diminish by the end of the valid 24hr TAF period. EXTENDED AVIATION OUTLOOK... Daily rain and thunderstorms will continue through Tuesday, but a frontal passage will then bring drier conditions back to the region for Wednesday and Thursday. VFR expected outside of morning valley fog through Thursday and rain/storms through Tuesday.
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&& .RNK WATCHES/WARNINGS/ADVISORIES... VA...None. NC...None. WV...None. && $$ SYNOPSIS...BMG NEAR TERM...BMG SHORT TERM...AS LONG TERM...AS AVIATION...BMG