Alert archive / Pennsylvania / Areal Flood Advisories in 2012

Areal Flood Advisory 21, NWS Cleveland, OH

June 1, 2012Crawford County, Pennsylvania

NWS Cleveland, OH issued this areal flood advisory at Jun 1, 2012, 5:03 PM EDT for Crawford County, Pennsylvania. It was in force for 4 hr.

The area

The outline as issued.

The facts

Issued
Jun 1, 2012, 5:03 PM EDT (21:03 UTC)
Expired
Jun 1, 2012, 9:00 PM EDT
In force
4 hr
Issued by
NWS Cleveland, OH
Area
Storm-based polygon

County Crawford County, PA

The radar

The Pittsburgh radar (KPBZ), 126 km from the middle of the area, began a volume at 21:05 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

Pittsburgh, PA (KPIT), launched 12:00Z, 9.1 hours before the alert went out and 138 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, Pittsburgh, PA at 12:00Z on 2012-06-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 215 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, Pittsburgh, PA at 12:00Z on 2012-06-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 250 square meters per square second.19395878Sfc1 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
215 J/kg
Mixed-layer CIN
-39 J/kg
Mixed-layer LCL
798 m above ground
0-6 km bulk shear
56 kt
0-1 km storm-relative helicity
250 m²/s²
0-3 km storm-relative helicity
319 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.6

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

203 
WGUS81 KCLE 012103
FLSCLE

FLOOD ADVISORY
NATIONAL WEATHER SERVICE CLEVELAND OH
503 PM EDT FRI JUN 1 2012

PAC039-020100-
/O.NEW.KCLE.FA.Y.0021.120601T2103Z-120602T0100Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CRAWFORD PA-
503 PM EDT FRI JUN 1 2012

THE NATIONAL WEATHER SERVICE IN CLEVELAND HAS ISSUED AN

* URBAN AND SMALL STREAM FLOOD ADVISORY FOR...
  CRAWFORD COUNTY IN NORTHWEST PENNSYLVANIA

* UNTIL 900 PM EDT

DOPPLER RADAR INDICATED A LINE OF HEAVY SHOWERS AND EMBEDDED 
THUNDERSTORMS MOVING ACROSS THE COUNTY. THESE SHOWERS AND 
THUNDERSTORMS ARE PRODUCING RAINFALL AMOUNTS RANGING BETWEEN A HALF 
INCH TO AN INCH AS THEY MOVE ACROSS THE COUNTY. THESE AMOUNTS...ON 
TOP OF RAIN FROM EARLIER TODAY...HAS CAUSED SOME MINOR FLOODING 
ACROSS THE AREA. ADDITIONAL FLOODING WILL BE POSSIBLE THROUGH 9 PM 
THIS EVENING AS THE HEAVIER SHOWERS AND THUNDERSTORMS MOVE ACROSS 
THE AREA. ANY FLOOD WATER WILL GRADUALLY RECEDE EARLY TONIGHT ONCE 
THE RAIN ENDS.

LOCAL STORM SPOTTERS IN MEADVILLE REPORTED SOME STREET FLOODING IN 
MEADVILLE JUST BEFORE 5 PM EDT. 

LAT...LON 4161 7961 4161 7982 4149 8000 4148 8051
      4185 8052 4185 7961

$$

ABE

Nearby

Areal Flood Advisories in Pennsylvania, 2012Every areal flood advisory 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.