What forecasters said that day
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Greenville-Spartanburg, SC wrote its last area forecast discussion before the first event at Jun 25, 7:02 PM EST, 1 hour 13 minutes earlier.
Area forecast discussion, Jun 25, 7:02 PM EST, 1 hour 13 minutes before
Area Forecast Discussion
National Weather Service Greenville-Spartanburg SC
802 PM EDT Wed Jun 25 2025
.SYNOPSIS...
Heat and humidity remains rather high. A large upper ridge weakens
late in the week allowing temperatures to get closer to normal by
the weekend. A disturbance meandering over the Deep South will
yield scattered to numerous showers and thunderstorms each day,
especially during the afternoon and evening hours. A weak cold
front reaches our region by Tuesday.
&&
.NEAR TERM /THROUGH THURSDAY/...
As of 5:35 PM EDT Wednesday: A cluster of strong thunderstorms is
currently making its way southward towards the NC/SC state line.
We're also seeing a few isolated cells develop over the SC Upstate
and I-77 Corridor. This activity will continue to move southward
over the next few hrs with more warnings likely needed as it does.
This convection is occurring within a very favorable environment for
damaging winds with +5000 J/kg of surface-based CAPE, 1200-1400 J/kg
of downdraft CAPE, steep lapse rates within a residual Elevated
Mixed Layer and anomalously cool air aloft. The result is very high
micro-burst composite values of 10-13 which aren't commonly seen in
the Carolinas and Georgia. Over the next several hrs, deep
convection will increase in coverage as a weak boundary drops into
the area within an inverted trough axis. Initially, weak flow will
result in very slow storm motions but composite cold pools will
eventually take over and drive storm prorogation. These cold pools
will be fairly deep and should have no problem lifting parcels to
their LFCs and initiating new updrafts along the leading edge of
outflow boundaries. A more widespread damaging wind event may take
shape as multiple cold pools become organized and storm mergers
occur. As such, an Enhanced Risk has been added for damaging winds.
Isolated large hail cannot be ruled out either, but will be harder
to come by in light of weak deep-layer vertical wind shear. Storms
will dissipate with loss of daytime heating thru the evening along
with sufficient overturning of the atmosphere. A few sct showers may
linger as late as midnight, but the rest of the overnight should be
quiet. Mtn valley fog will once again be possible, if not expected,
especially in the Little Tennessee Valley.
Heading into Thursday, an upper low associated with a Tropical Upper
Tropospheric Trough will slide across Florida with broad upper
ridging extending over the Mid-Atlantic. Rain cooled air from
today's convection should allow temperatures to start off 5 to 7
degrees cooler tomorrow morning compared to today. Less influence
from the upper ridge will also help to keep highs a couple degrees
cooler as well. Regardless, highs will once again soar into the low
to mid 90s. A moist boundary layer will keep dewpoints in the low to
near mid 70s with the greatest com-bination of hot temperatures and
increased moisture along the I-77 Corridor in the Charlotte metro.
Have hoisted another Heat Advisory for tomorrow afternoon along and
east of I-77. Another round of diur-nally driven convection is
expected tomorrow, but coverage and intensity should be notably
lower compared to today. The atmosphere will have to recover
sufficiently following today's storms and the residual EML will have
shifted out of the area. Forecast soundings are still supportive of
a few strong to severe storms with wet microbursts and the
advertised marginal risk from the Storm Prediction Center appears
justified.
&&
.SHORT TERM /THURSDAY NIGHT THROUGH SATURDAY/...
As of 300 PM EDT Wednesday: The upper ridge will continue to weaken
and retreat off the eastern seaboard in response to the approach
of a mid-latitude trough from the Great Lakes/Midwest. The cutoff
low over FL is stalled underneath the ridge, but it will start to
drift slowly northward Thursday night as the rex block breaks down
and the low interacts with the upstream trough.
The pattern will remain unsettled with showers and storms expected
each day. Coverage should be enhanced with an upper diffluent
pattern in between the FL low and mid-latitude trough. Additionally,
terrain circulations and a lee trough will provide low-level focus
for convection both days. Rain chances are accordingly high in
the mountains and foothills (likely PoP), tapering to chance PoPs
in the eastern piedmont. Weak shear profiles and a more moderate
level of instability will limit the severe thunderstorm risk,
the environment will continue to support strong wet microbursts
during peak heating. SPC has included the area in a marginal risk
on Friday accordingly. Additionally, with very weak steering flow
below 500 mb, storm motion will be slow, yielding a very local
threat of heavy rainfall and flooding.
&&
.LONG TERM /SATURDAY NIGHT THROUGH WEDNESDAY/...
As of 300 PM EDT Wednesday: The upper low will continue to meander
over the Deep South through the end of the weekend. A stronger
mid-latitude trough will eventually progress eastward, allowing a
cold front to reach the area by the early to mid portion of next
week (there are some timing differences for the front's arrival but
Tuesday appears most likely). This will result in the continuation
of a wet weather pattern with diurnally-driven showers and storms
Sunday and Monday. Precipitation coverage looks highest on Tuesday
with the front. An uptick in the threat for severe thunderstorm
and heavy rainfall/flooding is anticipated as well.
&&
.AVIATION /00Z THURSDAY THROUGH MONDAY/...
At KCLT and elsewhere: Clusters of strong thunderstorms are currently
moving south of most of our taf sites, although KCLT and KAND still
have TEMPOs for TSRA for the first couple hrs of the 00z taf period.
After that, a have VCTS thru late tonight at KCLT and our Upstate
terminals for any lingering convection. After midnight, conditions
should be mostly quiet thru the morning. Mtn valley fog will once
again be likely in the Little TN Valley and may develop at KAVL.
As such, I included some MVFR visby at KAVL beginning overnight,
but they could certainly end up going lower. Otherwise, another
round of sct afternoon/evening convection is expected tomorrow,
but coverage and intensity shouldn't be as much as today. Winds
will be light and VRB thru most of the taf period.
Outlook: Daily chances for afternoon/evening showers and thunder-
storms continue into the weekend. Fog and/or low stratus will be
possible each morning in the usual mtn valleys as well as near lakes
and rivers.
&&
.CLIMATE...
RECORDS FOR 06-25
MAX TEMPERATURE MIN TEMPERATURE
STATION HIGH LOW HIGH LOW
------- ---------- ---------- ---------- ----------
KAVL 96 1952 63 1889 69 1949 45 1972
1943
1891
KCLT 102 1914 70 1980 75 1952 53 1889
1915 1914
1889
KGSP 101 1952 69 1980 75 1931 52 1972
1925
RECORDS FOR 06-26
MAX TEMPERATURE MIN TEMPERATURE
STATION HIGH LOW HIGH LOW
------- ---------- ---------- ---------- ----------
KAVL 96 1948 65 1961 69 1952 49 1984
1974
KCLT 102 1952 68 1965 78 1948 55 1979
KGSP 100 1952 71 1991 77 1952 55 1979
1934 1974
1914
&&
.GSP WATCHES/WARNINGS/ADVISORIES...
GA...None.
NC...Heat Advisory from 2 PM to 8 PM EDT Thursday for NCZ036-037-
057-071-072-082.
SC...None.
&&
SYNOPSIS...JK
NEAR TERM...JPT/TW
SHORT TERM...JK
LONG TERM...JK
AVIATION...JPT
CLIMATE...JKHazardous weather outlook, Jun 25, 7:26 PM EST, 49 minutes before
Hazardous Weather Outlook
National Weather Service Greenville-Spartanburg SC
826 PM EDT Wed Jun 25 2025
GAZ010-017-018-026-028-029-NCZ069-070-SCZ008>014-019-101>109-270030-
Rabun-Habersham-Stephens-Franklin-Hart-Elbert-Lincoln-Gaston-
Cherokee-York-Anderson-Abbeville-Laurens-Union-Chester-Greenwood-
Oconee Mountains-Pickens Mountains-Greenville Mountains-
Greater Oconee-Greater Pickens-Central Greenville-
Southern Greenville-Northern Spartanburg-Southern Spartanburg-
826 PM EDT Wed Jun 25 2025
...SEVERE THUNDERSTORM WATCH 459 IN EFFECT UNTIL MIDNIGHT EDT
TONIGHT...
This Hazardous Weather Outlook is for northeast Georgia, Piedmont
North Carolina and Upstate South Carolina.
.DAY ONE...Tonight.
Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.
Severe Thunderstorm Watch.
.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.
No hazardous weather is expected at this time.
.SPOTTER INFORMATION STATEMENT...
None.
NCZ033-035-048>053-056-058-059-062>065-068-501>510-270030-
Avery-Alexander-Madison-Yancey-Mitchell-Swain-Haywood-Buncombe-
Catawba-Graham-Northern Jackson-Macon-Southern Jackson-Transylvania-
Henderson-Cleveland-Caldwell Mountains-Greater Caldwell-
Burke Mountains-Greater Burke-McDowell Mountains-Eastern McDowell-
Rutherford Mountains-Greater Rutherford-Polk Mountains-Eastern Polk-
826 PM EDT Wed Jun 25 2025
This Hazardous Weather Outlook is for Piedmont North Carolina and
western North Carolina.
.DAY ONE...Tonight.
No hazardous weather is expected at this time.
.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.
No hazardous weather is expected at this time.
.SPOTTER INFORMATION STATEMENT...
None.
NCZ036-037-057-071-072-082-270030-
Iredell-Davie-Rowan-Mecklenburg-Cabarrus-Union-
826 PM EDT Wed Jun 25 2025
...SEVERE THUNDERSTORM WATCH 459 IN EFFECT UNTIL MIDNIGHT EDT
TONIGHT...
...HEAT ADVISORY REMAINS IN EFFECT FROM 2 PM TO 8 PM EDT THURSDAY...
This Hazardous Weather Outlook is for Piedmont North Carolina.
.DAY ONE...Tonight.
Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.
Severe Thunderstorm Watch.
.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.
Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.
Heat Advisory.
.SPOTTER INFORMATION STATEMENT...
None.
In the hours before
Local storm report, Jun 25, 7:36 PM EST, 39 minutes before
Preliminary Local Storm Report
National Weather Service Greenville-Spartanburg SC
836 PM EDT Wed Jun 25 2025
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0720 PM Tstm Wnd Dmg 3 W Richburg 34.72N 81.07W
06/25/2025 Chester SC Utility Company
Outages near Old Richburg Rd due to fallen
trees and/or utility lines.
&&Local storm report, Jun 25, 7:50 PM EST, 25 minutes before
Preliminary Local Storm Report
National Weather Service Greenville-Spartanburg SC
850 PM EDT Wed Jun 25 2025
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0645 PM Tstm Wnd Dmg 1 N Stallings 35.09N 80.69W
06/25/2025 Union NC Utility Company
Scattered outages due to fallen trees and/or
utility lines from Matthews to Indian Trail.
Time estimated from radar.
&&Special weather statement, Jun 25, 7:52 PM EST, 23 minutes before
Special Weather Statement
National Weather Service Greenville-Spartanburg SC
852 PM EDT Wed Jun 25 2025
SCZ010-104-105-260115-
Greater Oconee SC-Anderson SC-Greater Pickens SC-
852 PM EDT Wed Jun 25 2025
...A STRONG THUNDERSTORM WILL IMPACT WEST CENTRAL ANDERSON...
SOUTHWESTERN PICKENS AND SOUTHEASTERN OCONEE COUNTIES THROUGH 915 PM
EDT...
At 852 PM EDT, Doppler radar was tracking a strong thunderstorm 6
miles south of Seneca, moving south at 10 mph.
HAZARD...Wind gusts up to 40 mph and pea size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor hail damage to outdoor objects is
possible.
Locations impacted include...
Clemson, Seneca, Walhalla, Pendleton, Westminster, Six Mile, Central,
Lake Hartwell, Lake Keowee, and Townville.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
A Severe Thunderstorm Watch remains in effect until midnight EDT for
northeastern Georgia...and Upstate South Carolina.
&&
LAT...LON 3448 8303 3452 8308 3453 8308 3454 8311
3456 8313 3456 8314 3458 8315 3476 8320
3478 8314 3485 8283 3454 8273 3448 8298
3448 8299 3447 8300
TIME...MOT...LOC 0052Z 356DEG 8KT 3460 8293
MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH
MPRSpecial weather statement, Jun 25, 8:02 PM EST, 13 minutes before
Special Weather Statement
National Weather Service Greenville-Spartanburg SC
902 PM EDT Wed Jun 25 2025
GAZ010-017-260130-
Rabun GA-Habersham GA-
902 PM EDT Wed Jun 25 2025
...A STRONG THUNDERSTORM WILL IMPACT NORTHERN HABERSHAM AND
SOUTHWESTERN RABUN COUNTIES THROUGH 930 PM EDT...
At 902 PM EDT, Doppler radar was tracking a strong thunderstorm 9
miles southwest of Clayton, or near Lake Rabun, moving south at 5
mph.
HAZARD...Wind gusts of 50 to 55 mph and nickel size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor hail damage to outdoor objects is
possible.
Locations impacted include...
Lake Rabun, Lakemont, Lake Burton, Seed Lake, Turnerville, Hollywood,
and Batesville.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
A Severe Thunderstorm Watch remains in effect until midnight EDT for
northeastern Georgia.
&&
LAT...LON 3480 8360 3482 8343 3466 8340 3463 8362
TIME...MOT...LOC 0102Z 357DEG 6KT 3477 8350
MAX HAIL SIZE...0.88 IN
MAX WIND GUST...55 MPH
MPRSpecial weather statement, Jun 25, 8:12 PM EST, 3 minutes before
Special Weather Statement
National Weather Service Greenville-Spartanburg SC
912 PM EDT Wed Jun 25 2025
GAZ028-260145-
Hart GA-
912 PM EDT Wed Jun 25 2025
...A STRONG THUNDERSTORM WILL IMPACT CENTRAL HART COUNTY THROUGH 945
PM EDT...
At 912 PM EDT, Doppler radar was tracking a strong thunderstorm near
Hartwell, moving southeast at 15 mph.
HAZARD...Wind gusts up to 50 mph and half inch hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor hail damage to outdoor objects is
possible.
Locations impacted include...
Hartwell, Reed Creek, Bowersville, Canon, and Lake Hartwell.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
A Severe Thunderstorm Watch remains in effect until midnight EDT for
northeastern Georgia...and Upstate South Carolina.
&&
LAT...LON 3430 8310 3435 8310 3435 8311 3436 8311
3441 8310 3449 8305 3449 8304 3447 8300
3448 8299 3448 8289 3431 8285
TIME...MOT...LOC 0112Z 302DEG 13KT 3439 8296
MAX HAIL SIZE...0.50 IN
MAX WIND GUST...50 MPH
MPRSpecial weather statement, Jun 25, 8:13 PM EST, 2 minutes before
Special Weather Statement
National Weather Service Greenville-Spartanburg SC
913 PM EDT Wed Jun 25 2025
SCZ009-260200-
York SC-
913 PM EDT Wed Jun 25 2025
...STRONG THUNDERSTORMS WILL IMPACT SOUTHEASTERN YORK COUNTY THROUGH
1000 PM EDT...
At 912 PM EDT, Doppler radar was tracking a cluster of strong
thunderstorms near Rock Hill, moving west at 15 mph.
HAZARD...Wind gusts up to 40 mph and pea size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor hail damage to outdoor objects is
possible.
Locations impacted include...
Rock Hill, York, Fort Mill, Tega Cay, Newport, Lesslie, Mcconnells,
and Lake Wylie.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.
A Severe Thunderstorm Watch remains in effect until midnight EDT for
Upstate South Carolina.
&&
LAT...LON 3488 8089 3482 8106 3482 8125 3503 8131
3504 8093
TIME...MOT...LOC 0112Z 077DEG 12KT 3495 8100
MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH
8