Thunderstorms formed over the mountains in a weak flow. Outflow boundaries helped trigger new convection on the perimeter of the existing storms.
Every event with a place to put it. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS RLX wrote it up.
Thunderstorms formed over the mountains in a weak flow. Outflow boundaries helped trigger new convection on the perimeter of the existing storms. Localized downpours caused 2.6 inches of rain at Valley Head in a few hours. However, no significant flooding occurred. One storm did cause localized wind damage in eastern Harrison County.
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 Charleston, WV wrote its last area forecast discussion before the first event at May 27, 2:20 PM EST, 4 hours 15 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE CHARLESTON WV 320 PM EDT THU MAY 27 2010 .SYNOPSIS... A WEAK UPPER TROUGH AND A BACKDOOR COLD FRONT FRIDAY INTO SATURDAY. WEAK HIGH PRESSURE WITH DRY WEATHER SUNDAY INTO EARLY MONDAY. && .NEAR TERM /THROUGH FRIDAY/... AFTERNOON CONVECTION OVER MOUNTAINS WILL GRADUALLY DISSIPATE AFTER 22Z. MEANWHILE...WEAK UPPER LEVEL TROUGH MOVING EASTWARD THROUGH OHIO/INDIANA WILL SLIDE INTO SE OHIO COUNTIES THIS EVENING. COULD SEE SOME CONVECTION FORM ALONG THIS BOUNDARY GIVEN FORECAST MAX TEMPS AND INSTABILITY. ANY CONVECTION WILL DISSIPATE WITH LOSS OF HEATING BY 04-06Z. UPPER LEVEL TROUGH AXIS MOVES INTO CENTRAL AND EASTERN WEST VIRGINIA FRIDAY AFTERNOON AND EVENING IN CONJUNCTION WITH A BACK DOOR COLD FRONT DROPPING SOUTHWESTWARD FROM MARYLAND AND PENNSYLVANIA DURING THE SAME TIME FRAME. AFTERNOON AND EVENING THUNDERSTORMS LIKELY ONCE AGAIN IN A LARGER AREA MAINLY EAST OF A PARKERSBURG TO CHARLESTON TO WILLIAMSON LINE. && .SHORT TERM /FRIDAY NIGHT THROUGH SUNDAY NIGHT/... RAIN AND THUNDERSTORMS WILL LINGER OVER THE EASTERN HIGH TERRAIN FRIDAY NIGHT INTO SATURDAY MORNING. DRY CONDITIONS WILL RETURN SATURDAY AND PREVAIL THROUGH SUNDAY NIGHT AS THE SURFACE HIGH PRESSURE TRIES TO REESTABLISH ITSELF OVER THE MID ATLANTIC REGION. HIGH TEMPERATURES WILL REMAIN WARM...WITH HIGHS IN THE MID TO UPPER 80S ON SUNDAY AS THE AREA DRIES OUT AND SKIES BEGIN TO CLEAR. && .LONG TERM /MONDAY THROUGH THURSDAY/... BASED THE LONG TERM FORECAST ON A BLEND OF THE NAM AND ECMWF SOLUTIONS...AS PER HPCS DISCUSSION. THE NAM AND ECMWF MODELS SHOWED ADEQUATE AGREEMENT ON THE OVERALL PATTERN...WHILE THE LATEST GFS RUN HAD A REMARKABLY DIFFERENT SOLUTION AND WAS CONSEQUENTLY THROWN OUT. THE SURFACE HIGH PRESSURE BEGINS TO WEAKEN AND ALLOWS A COLD FRONT TO SINK SOUTH AND STALL OVER WV MONDAY NIGHT INTO TUESDAY...WHICH WILL TRIGGER SHOWERS AND THUNDERSTORMS MONDAY NIGHT THROUGH WEDNESDAY NIGHT. WE WILL HAVE THURSDAY MORNING AND PART OF THURSDAY AFTERNOON TO DRY OUT BEFORE THE RAIN ASSOCIATED WITH NEXT LOW PRESSURE SYSTEM APPROACHES LATE THURSDAY AFTERNOON. RAIN AND THUNDERSTORMS WILL BEGIN ON THURSDAY AFTERNOON AS THE WARM FRONT PUSHES NORTH THROUGH WV...AND WILL CONTINUE THROUGH FRIDAY OUT IN FRONT OF THE COLD FRONT APPROACHING FROM THE WEST. && .AVIATION /20Z THURSDAY THROUGH TUESDAY/... VFR CONDITIONS AND LIGHT SURFACE WINDS EXPECTED THRU FRIDAY. SCATTERED THUNDERSTORMS EXPECTED 18Z-00Z IN EASTERN MOUNTAINS...AND SE OHIO 00Z-06Z. MORE SCATTERED THUNDERSTORMS 15Z-18Z FRIDAY MAINLY EAST OF OHIO RIVER. AFTER 18Z FRIDAY... IFR CONDITIONS POSSIBLE IN SCATTERED THUNDERSTORMS EASTERN AND SOUTHERN AREAS FRIDAY NIGHT. && .RLX WATCHES/WARNINGS/ADVISORIES... WV...NONE. OH...NONE. KY...NONE. VA...NONE. && SYNOPSIS...JKF/JEM NEAR TERM...JKF SHORT TERM...JEM LONG TERM...JEM AVIATION...
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE CHARLESTON WV 320 PM EDT THU MAY 27 2010 WVZ027-028-030-032-037>040-046-047-281930- CLAY-BRAXTON-LEWIS-TAYLOR-NICHOLAS-WEBSTER-UPSHUR-BARBOUR-POCAHONTAS- RANDOLPH- 320 PM EDT THU MAY 27 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR WEST VIRGINIA. .DAY ONE...THIS AFTERNOON AND TONIGHT. ISOLATED STRONG THUNDERSTORMS CAPABLE OF PRODUCING HEAVY RAIN WILL CREATE LOCALIZED PONDING OF WATER ON ROADWAYS AND IN POOR DRAINAGE AND LOW LYING AREAS. SOME OF THESE THUNDERSTORMS MAY REACH SEVERE LIMITS...WITH STRONG WINDS AND HAIL AS THE PRIMARY THREATS. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHARLESTON WEST VIRGINIA
516 PM EDT THU MAY 27 2010
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION...ST.. ...SOURCE....
..REMARKS..
0506 PM HEAVY RAIN VALLEY HEAD 38.52N 80.04W
05/27/2010 2.50 RANDOLPH WV PUBLIC
&&
NNNNSPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHARLESTON WV 522 PM EDT THU MAY 27 2010 WVZ028-030-038-039-272230- BRAXTON-LEWIS-WEBSTER-UPSHUR- INCLUDING THE CITIES OF...SUTTON...GASSAWAY...BURNSVILLE... WESTON...WEBSTER SPRINGS...BUCKHANNON 522 PM EDT THU MAY 27 2010 SLOW MOVING SHOWERS AND THUNDERSTORMS WERE MEANDERING THROUGH BRAXTON...LEWIS...WEBSTER...AND UPSHUR COUNTIES. AT 520 PM...THE HEAVIEST DOWNPOURS WERE NEAR DIANA...HACKER VALLEY AND SOUTH OF CLEVELAND IN WEBSTER COUNTY. THROUGH 630 PM...NEW SLOW MOVING SHOWERS AND STORMS COULD EASILY FORM. IF THEY PERSIST OVER ONE AREA...FLASH FLOOD WARNINGS MAY BE POSTED. LOCALIZED DOWNPOURS OF A HALF INCH OF RAIN OR MORE ARE POSSIBLE IN 15 MINUTES. THESE WOULD CAUSE WATER TO POND ON ROADS AND QUICKLY FILL ROADSIDE DITCHES AND SMALL STREAMS. PLEASE REPORT SIGNIFICANT WEATHER TO THE NATIONAL WEATHER SERVICE BY CALLING TOLL FREE...877-633-6772...WHEN YOU CAN DO SO SAFELY.
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHARLESTON WV
524 PM EDT THU MAY 27 2010
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0500 PM HEAVY RAIN VALLEY HEAD 38.55N 80.03W
05/27/2010 M0.00 INCH RANDOLPH WV CO-OP OBSERVER
VALLEY HEAD COOP OBSERVER REPORTED 2.64 INCHES OF RAIN
FROM ABOUT 3PM TO 5PM.
&&
TAXFORDSPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON WV
528 PM EDT THU MAY 27 2010
WVZ047-272245-
RANDOLPH WV-
528 PM EDT THU MAY 27 2010
...DOWNPOURS OCCURRED BETWEEN 2 AND 4 PM OVER THE HEADWATERS OF THE
TYGART VALLEY RIVER IN SOUTHERN RANDOLPH COUNTY...
AROUND 2.5 INCHES OF RAIN FELL IN THE VICINITY OF VALLEY
HEAD...BETWEEN 1 AND 4 PM. OVERFLOWING DITCH LINES AND WATER
PONDING IN LOW SPOTS WERE COMMON. EVENING MOTORISTS SHOULD BE AWARE
THAT LOOSE DEBRIS MAY BE LEFT ON ROADS.
LUCKILY...THE RAINS BECAME LIGHTER AFTER 4 PM. AT 5:20 PM...ONLY
LIGHT RAIN WAS NEAR VALLEY HEAD.
FEEDING STREAMS...SUCH AS LOGAN RUN...WINDY RUN...RALSTON RUN...AND
BIG RUN WILL CAUSE A SHARP RISE ON THE UPPER TYGART VALLEY RIVER
BETWEEN VALLEY HEAD AND HUTTONSVILLE TONIGHT. SINCE THE HEAVY RAIN
WAS NOT WIDESPREAD...RIVER FLOODING IS NOT EXPECTED.
LAT...LON 3849 8000 3848 8007 3852 8008 3854 8009
3858 8005 3858 7999 3852 7994
22SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON WV
638 PM EDT THU MAY 27 2010
WVZ039-040-047-272330-
BARBOUR WV-RANDOLPH WV-UPSHUR WV-
638 PM EDT THU MAY 27 2010
A CLUSTER OF SLOW MOVING SHOWERS AND THUNDERSTORMS WAS DRIFTING
NORTH THROUGH NORTHERN UPSHUR...AND MOVING INTO BARBOUR COUNTY FROM
NORTHERN RANDOLPH COUNTY.
THIS INCLUDED AREAS AROUND BUCKHANNON...AUDRA STATE PARK...
AND BELINGTON.
FREQUENT LIGHTNING...SMALL HAIL...AND LOCALIZED DOWNPOURS ARE
LIKELY. RAIN OF A HALF INCH COULD FALL IN 15 TO 30 MINUTES...CAUSING
FULL DITCH LINES AND WATER FLOWING ACROSS OR PONDING ON ROADS.
IF YOU SEE LIGHTNING OR HEAR THUNDER...DO NOT STAY IN THE OPEN AREA
OR SEEK SHELTER UNDER TREES...MOVE INDOORS.
AFTER 7 O'CLOCK...THIS BATCH OF SHOWERS AND THUNDERSTORMS
WILL LIKELY AFFECT AREAS FURTHER NORTH IN BARBOUR COUNTY...INCLUDING
THE PHILLIPI AND NESTORVILLE VICINITIES.
PLEASE REPORT SIGNIFICANT WEATHER TO THE NATIONAL WEATHER SERVICE BY
CALLING TOLL FREE...877-633-6772...WHEN YOU CAN DO SO SAFELY.
LAT...LON 3896 7989 3888 8037 3912 8023 3922 8016
3925 8007 3925 8000 3927 7997 3926 7987
3911 7983
22PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHARLESTON WV
658 PM EDT THU MAY 27 2010
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0656 PM HEAVY RAIN BUCKHANNON 38.99N 80.23W
05/27/2010 M0.50 INCH UPSHUR WV TRAINED SPOTTER
SPOTTER AT GOLF COURSE. RAIN IN ABOUT AN HOUR. RAIN HAS
ENDED.
&&
KBATTYThe national radar mosaic for the moment the first event began.
1 thunderstorm wind. Local standard time, as filed.
The wind blew off a portion of a tin roof to an indoor riding barn.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in West Virginia in 2010Every state in 2010This day in weather historyWarnings in West Virginia, May 2010
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 229385.