Alert archive / West Virginia / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 93, NWS Charleston, WV

July 25, 20104 counties in West Virginia

NWS Charleston, WV issued this severe thunderstorm warning at Jul 25, 2010, 3:21 PM EDT for 4 counties in West Virginia. It was in force for 28 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Jul 25, 2010, 3:21 PM EDT (19:21 UTC)
Expired
Jul 25, 2010, 3:49 PM EDT
In force
28 min
Issued by
NWS Charleston, WV
Area
Storm-based polygon

Counties Clay County, WV, Fayette County, WV, Kanawha County, WV, Nicholas County, WV

The radar

The Charleston,WV radar (KRLX), 53 km from the middle of the area, began a volume at 19:23 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Jul 25, 11:29 AM EDTSevere Thunderstorm WatchSPC8 hr

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 12:00Z, 7.4 hours before the alert went out and 265 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Cncnati-Daytn, OH at 12:00Z on 2010-07-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1340 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Cncnati-Daytn, OH at 12:00Z on 2010-07-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 45 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
1340 J/kg
Mixed-layer CIN
-43 J/kg
Mixed-layer LCL
939 m above ground
0-6 km bulk shear
48 kt
0-1 km storm-relative helicity
45 m²/s²
0-3 km storm-relative helicity
185 m²/s²
Significant tornado parameter
0.0
Supercell composite
3.8

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, 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 this severe thunderstorm warning went out at Jul 25, 1:37 PM EDT, 1 hour 44 minutes earlier.

Area forecast discussion, Jul 25, 1:37 PM EDT, 1 hour 44 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE CHARLESTON WV
137 PM EDT SUN JUL 25 2010

.SYNOPSIS...
A COLD FRONT PUSHES SOUTH THROUGH THE REGION TONIGHT AND SOUTH OF
THE REGION MONDAY WHERE IT WILL LINGER.  TOWARDS WEEKS END HIGH
PRESSURE WILL FINALLY ROLL IN BEHIND A COLD FRONT.

&&

.NEAR TERM /THROUGH MONDAY/...
FIRST WAVE OF STORMS GOING THROUGH.  HI RES MODELS SHOW ANOTHER VORT
AREA SWINGING THROUGH LATER THIS AFTERNOON WITH HIGHER PRECIPITABLE
WATER VALUES AND HIGHER CAPES AND SOME LOW LEVEL CONVERGENCE. FOCUS
BEST IN THE VICINITY NE KY ACROSS SW WV.  FLOODING WITH HEAVY RAINS
BEST BET IF SOMETHING DOES HAPPEN THERE.

AFTER FRONT PUSHES SOUTH MONDAY KEEPING LIKELY IN THE SOUTH AS NAM
DOES INDICATE SOME DYNAMICS OVER EXTREME SOUTH IN AFTERNOON.

&&

.SHORT TERM /MONDAY NIGHT THROUGH WEDNESDAY NIGHT/...
ONLY MADE A FEW TWEAKS TO THE PREVIOUS FORECAST. MUCH OF THE
NORTHERN HALF OF THE CWA WILL HAVE MUCH DRIER...AND SLIGHTLY COOLER
WEATHER BEHIND THE FRONT. CLOSER TO THE FRONTAL BOUNDARY...WILL
CONTINUE TO EXPERIENCE HIGHER PW VALUES...BETWEEN 1.5 TO 1.7 INCHES.
SOUTHERN ZONES WILL CONTINUE TO REMAIN UNSETTLED FOR THE SHORT TERM.
TEMPS DURING THE PERIOD WILL REBOUND NICELY...BACK INTO THE UPPER
80S FOR MOST OF THE REGION.

&&

.LONG TERM /THURSDAY THROUGH SUNDAY/...
UNSETTLED...HOT AND HUMID WEATHER WILL CONTINUE IN THE LONG TERM
ACROSS THE ENTIRE CWA. THIS PATTERN OF HOT...HUMID AND UNSETTLED
WEATHER WILL CONTINUE UNTIL AT LEAST THURSDAY...WHEN ANOTHER COLD
FRONT WILL SINK SOUTH INTO THE REGION. THIS WILL BRING AN INCREASE
IN SHOWERS AND THUNDERSTORMS TO THE CWA.

&&

.AVIATION /18Z SUNDAY THROUGH FRIDAY/...
MVFR ACROSS AREA WITH CU GIVING WAY TO VFR THIS EVENING ACROSS MOST
OF REGION.  EXCEPTION WILL BE BRIEFLY IN THUNDERSTORMS WHERE QUICK
IFR WILL DEVELOP.  AFTER CLOUDS THIN OVERNIGHT ENOUGH MOISTURE WILL
BE AROUND TO ENABLE VALLEY FOG WITH LIFR TO DEVELOP.  CONDITIONS
WILL IMPROVE AS DRYING OUT OCCURS MONDAY MORNING.

FORECAST CONFIDENCE AND ALTERNATE SCENARIOS THROUGH 00Z MONDAY...

FORECAST CONFIDENCE:  HIGH INTO THIS EVENING AND MEDIUM WITH FOG
FORMATION OVER NIGHT.

ALTERNATE SCENARIOS:CONDITIONS FROM FOG MAY NOT BE AS LOW OVER
NIGHT.

EXPERIMENTAL TABLE OF FLIGHT CATEGORY OBJECTIVELY SHOWS CONSISTENCY
OF WFO FORECAST TO AVAILABLE MODEL INFORMATION:
H = HIGH:   TAF CONSISTENT WITH ALL MODELS OR ALL BUT ONE MODEL.
M = MEDIUM: TAF HAS VARYING LEVEL OF CONSISTENCY WITH MODELS.
L = LOW:    TAF INCONSISTENT WITH ALL MODELS OR ALL BUT ONE MODEL.

DATE                    SUN 07/25/10
UTC 1HRLY       18   19   20   21   22   23   00   01   02   03   04   05
EDT 1HRLY       14   15   16   17   18   19   20   21   22   23   00   01
CRW CONSISTENCY  H    M    M    M    M    H    H    H    H    H    H    H
HTS CONSISTENCY  H    M    M    M    H    H    H    H    H    H    H    H
BKW CONSISTENCY  H    H    H    H    H    H    M    M    M    M    H    H
EKN CONSISTENCY  H    M    M    H    M    M    M    M    M    M    M    M
PKB CONSISTENCY  M    H    L    L    M    H    H    H    H    H    H    H
CKB CONSISTENCY  M    M    L    L    H    M    M    H    H    H    H    H

AFTER 18Z MONDAY...
IFR CONDITIONS POSSIBLE IN THUNDERSTORMS OVER THE SOUTHERN COUNTIES
MONDAY AND MONDAY NIGHT.

&&

.RLX WATCHES/WARNINGS/ADVISORIES...
WV...NONE.
OH...NONE.
KY...NONE.
VA...NONE.

&&

SYNOPSIS...AAR/SL
NEAR TERM...AAR
SHORT TERM...SL
LONG TERM...SL
AVIATION...AAR
Hazardous weather outlook, Jul 25, 2:43 PM EDT, 38 minutes before
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In the hours before

Local storm report, Jul 25, 2:03 PM EDT, 1 hour 18 minutes before
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Local storm report, Jul 25, 2:05 PM EDT, 1 hour 16 minutes before
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Special weather statement, Jul 25, 2:16 PM EDT, 1 hour 5 minutes before
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Special weather statement, Jul 25, 2:22 PM EDT, 59 minutes before
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Special weather statement, Jul 25, 2:55 PM EDT, 26 minutes before
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Special weather statement, Jul 25, 2:57 PM EDT, 24 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON WV
257 PM EDT SUN JUL 25 2010

WVZ027-036-037-252000-
CLAY WV-FAYETTE WV-NICHOLAS WV-
257 PM EDT SUN JUL 25 2010

...A STRONG THUNDERSTORM WILL AFFECT NORTHEASTERN FAYETTE...SOUTHERN
NICHOLAS AND SOUTHWESTERN CLAY COUNTIES...

AT 256 PM EDT...A STRONG THUNDERSTORM WAS LOCATED 14 MILES SOUTH OF
CLAY...MOVING EAST AT 35 MPH.

WIND GUSTS TO 50 MPH ARE POSSIBLE WITH THIS STORM. VERY HEAVY RAIN
WILL FALL FROM THIS STORM...AND WILL CAUSE WATER TO POND ON ROADS AND
QUICKLY FILL ROADSIDE DITCHES AND SMALL STREAMS.

THIS STORM WILL BE NEAR DRENNAN AROUND 310 PM...KESSLERS CROSS LANES
AROUND 315 PM...SUMMERSVILLE AROUND 320 PM...MOUNT NEBO AROUND 325
PM...CANVAS AROUND 330 PM AND NETTIE AROUND 340 PM.

PLEASE REPORT SIGNIFICANT WEATHER TO THE NATIONAL WEATHER SERVICE BY
CALLING TOLL FREE...877-633-6772...WHEN YOU CAN DO SO SAFELY.

LAT...LON 3807 8071 3810 8085 3809 8088 3806 8085
      3808 8082 3807 8080 3805 8081 3802 8077
      3799 8077 3799 8078 3822 8128 3827 8123
      3832 8125 3839 8121 3825 8046

26

The office that day

Everything else NWS Charleston, WV issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 25, 3:36 AM EDTFlash Flood WatchRLXBarbour, Boone, Braxton, Cabell, Calhoun, Clay and 22 more19 hr
Jul 25, 12:06 PM EDTSpecial Weather StatementRLXBarbour, Braxton, Calhoun, Doddridge, Gilmer, Harrison and 4 more54 min
Jul 25, 12:11 PM EDTSpecial Weather StatementRLXMason49 min
Jul 25, 12:19 PM EDTSevere Thunderstorm WarningRLXJackson, Kanawha, Mason, Putnam56 min
Jul 25, 12:30 PM EDTSevere Thunderstorm WarningRLXBarbour, Harrison, Randolph, Taylor60 min
Jul 25, 1:30 PM EDTSpecial Weather StatementRLXRandolph60 min
Jul 25, 1:36 PM EDTSpecial Weather StatementRLXRoane54 min
Jul 25, 2:16 PM EDTSpecial Weather StatementRLXKanawha, Putnam59 min
Jul 25, 2:22 PM EDTSpecial Weather StatementRLXClay, Nicholas53 min
Jul 25, 2:55 PM EDTSpecial Weather StatementRLXKanawha, Putnam65 min
Jul 25, 2:57 PM EDTSpecial Weather StatementRLXNicholas63 min
Jul 25, 4:03 PM EDTSpecial Weather StatementRLXBoone, Kanawha27 min
Jul 25, 4:35 PM EDTSpecial Weather StatementRLXFayette, Logan, Mingo, Raleigh55 min
Jul 25, 4:53 PM EDTSevere Thunderstorm WarningRLXFayette, Raleigh37 min
Jul 25, 5:12 PM EDTSpecial Weather StatementRLXKanawha, Putnam33 min
Jul 25, 5:41 PM EDTSpecial Weather StatementRLXLincoln, Wayne49 min
Jul 25, 6:15 PM EDTFlash Flood WarningRLXBoone, Lincoln, Wayne2 hr

Nearby

Severe Thunderstorm Warnings in West Virginia, 2010Every severe thunderstorm warning in 2010

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.