Alert archive / West Virginia / Flash Flood Watches in 2012

Flash Flood Watch 1, NWS Pittsburgh, PA

February 29, 2012Marion County, Wetzel County, West Virginia

NWS Pittsburgh, PA issued this flash flood watch at Feb 29, 2012, 1:11 PM EST for Marion County, Wetzel County, West Virginia. It took effect at Feb 29, 2012, 2:00 PM EST. It was in force for 8 hr.

The area

The counties it named.

The facts

Issued: Feb 29, 2012, 1:11 PM EST (18:11 UTC)
In effect from: Feb 29, 2012, 2:00 PM EST
Expired: Feb 29, 2012, 9:31 PM EST
In force: 8 hr
Issued by: NWS Pittsburgh, PA
Flood severity: None

Counties Marion County, WV, Wetzel County, WV

The radar

The Pittsburgh radar (KPBZ), 110 km from the middle of the area, began a volume at 18:11 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 nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 6.2 hours before the alert went out and 270 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1250 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 386 m²/s²
0-3 km storm-relative helicity: 444 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flash flood watch went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Pittsburgh, PA wrote its last area forecast discussion before this flash flood watch went out at Feb 29, 9:51 AM EST, 3 hours 20 minutes earlier.

Area forecast discussion, Feb 29, 9:51 AM EST, 3 hours 20 minutes before

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Hazardous weather outlook, Feb 29, 4:18 AM EST, 8 hours 53 minutes before

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In the hours before

Special weather statement, Feb 29, 11:00 AM EST, 2 hours 11 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PITTSBURGH PA
1100 AM EST WED FEB 29 2012

PAZ007>009-013>015-020-022-291700-
ARMSTRONG PA-BEAVER PA-BUTLER PA-CLARION PA-FOREST PA-LAWRENCE
PA-MERCER PA-VENANGO PA-
1100 AM EST WED FEB 29 2012

...THUNDERSTORMS...

THUNDERSTORMS TO MOVE THROUGH THE FOLLOWING COUNTIES...
ARMSTRONG...BEAVER...BUTLER...CLARION...FOREST...LAWRENCE...MERCER
AND VENANGO...

AT 1051 AM EST NATIONAL WEATHER SERVICE DOPPLER RADAR IN PITTSBURGH
INDICATED STRONG THUNDERSTORMS 6 MILES NORTHWEST OF DARLINGTON...OR
ABOUT 3 MILES NORTHEAST OF EAST PALESTINE...MOVING EAST AT 50 MPH.

SOME OF THESE STORMS WILL BE ACCOMPANIED BY DANGEROUS LIGHTNING...
WIND GUSTS TO 35 MPH AND HEAVY DOWNPOURS THAT MAY CAUSE PONDING
OF WATER ON ROADS.

KEEP AN EYE TO THE SKY AND MOVE TO A SAFE PLACE IF THUNDERSTORMS
APPROACH.

PLEASE REPORT HAIL...STRONG WINDS OR WIND DAMAGE TO THE NATIONAL
WEATHER SERVICE BY CALLING TOLL FREE...1-877-633-6772.

LAT...LON 4160 7925 4077 7924 4069 7935 4067 8051
      4148 8050 4149 8038 4148 8014 4149 8012
      4149 8001 4154 7994

Special weather statement, Feb 29, 11:35 AM EST, 1 hour 36 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PITTSBURGH PA
1135 AM EST WED FEB 29 2012

MDZ001-PAZ031-075-076-WVZ021>023-041-291700-
FAYETTE PA-FAYETTE RIDGES PA-GARRETT MD-GREENE PA-MARION WV-
MONONGALIA WV-PRESTON WV-TUCKER WV-
1135 AM EST WED FEB 29 2012

...THUNDERSTORMS WITH HEAVY DOWNPOURS WILL AFFECT EASTERN
GREENE...GARRETT...MARION...MONONGALIA...NORTHWESTERN
TUCKER...PRESTON AND SOUTHERN FAYETTE COUNTIES...

AT 1130 AM EST...A STRONG THUNDERSTORM WAS LOCATED
MANNINGTON...MOVING EAST AT 50 MPH.

SOME OF THESE STORMS WILL BE ACCOMPANIED BY DANGEROUS LIGHTNING...
WIND GUSTS TO 40MPH AND HEAVY DOWNPOURS THAT CAN CAUSE PONDING OF
WATER ON ROADS AND FLOODING IN POOR DRAINAGE AREAS.

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

LAT...LON 3936 7922 3923 7942 3921 7938 3922 7933
      3919 7935 3923 7942 3920 7947 3927 7986
      3930 7990 3943 7990 3945 7993 3938 8009
      3939 8020 3945 8041 3994 8032 3991 7939
      3985 7941 3979 7935 3973 7938 3971 7895

The office that day

Everything else NWS Pittsburgh, PA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Feb 29, 11:00 AM EST	Special Weather Statement	PBZ	Armstrong, Beaver, Butler, Clarion, Forest, Lawrence and 2 more	60 min
Feb 29, 4:16 PM EST	River Flood Advisory	PBZ	Allegheny	49 hr
Feb 29, 6:30 PM EST	Special Weather Statement	PBZ	Greene	60 min
Feb 29, 5:27 PM EST	Special Weather Statement	PBZ	Monroe, Noble	63 min
Feb 29, 3:37 PM EST	Special Weather Statement	PBZ	Marion, Monongalia, Preston, Tucker, Wetzel	23 min
Feb 29, 4:03 PM EST	Special Weather Statement	PBZ	Marion, Monongalia, Preston	57 min
Feb 29, 4:35 PM EST	Flash Flood Warning	PBZ	Marion, Monongalia, Preston, Tucker, Wetzel	3 hr

Nearby

Flash Flood Watches in West Virginia, 2012 Every flash flood watch in 2012

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.