Alert archive / Pennsylvania / Flash Flood Warnings in 1986
Flash Flood Warning 2, NWS Pittsburgh, PA
NWS Pittsburgh, PA issued this flash flood warning at Oct 3, 1986, 9:06 PM EDT for Butler County, Pennsylvania. It was in force for 4 hr.
The area
The counties it named.
The facts
- Issued
- Oct 3, 1986, 9:06 PM EDT (01:06 UTC)
- Expired
- Oct 4, 1986, 1:00 AM EDT
- In force
- 4 hr
- Issued by
- NWS Pittsburgh, PA
- Area
- Whole counties
County Butler County, PA
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
The nearest sounding before it
Pittsburgh, PA (KPIT), launched 00:00Z, 1.1 hours before the alert went out and 58 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.
- Mixed-layer CAPE
- 629 J/kg
- Mixed-layer CIN
- -7 J/kg
- Mixed-layer LCL
- 811 m above ground
- 0-6 km bulk shear
- 63 kt
- 0-1 km storm-relative helicity
- 365 m²/s²
- 0-3 km storm-relative helicity
- 525 m²/s²
- Significant tornado parameter
- 1.9
- Supercell composite
- 11.7
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KPIT 040112 FFWPIT PAC019-033-040500- BULLETIN - IMMEDIATE BROADCAST REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE PITTSBURGH PA 906 PM EDT FRI OCT 3 1986 THE NATIONAL WEATHER SERVICE HAS ISSUED A FLASH FLOOD WARNING EFFECTIVE UNTIL 100 AM EDT FOR PEOPLE IN THE FOLLOWING COUNTIES OF WESTERN PENNSYLVANIA...BUTLER AND CLEARFIELD AT 855PM PITTSBURGH WEATHER RADAR INDICATED HEAVY RAINS ACROSS BUTLER COUNTY. ALSO HEAVY RAIN WAS MOVING BACK INTO CLEARFIELD COUNTY. FLOODING HAS BEEN REPORTED ALONG ROUTE 68 IN BUTLER COUNTY AS OF 850PM A FLOOD WARNING MEANS FLOODING IS IMMINENT OR OCCURRING. MOVE TO HIGHER GROUND IN THE EVENT OF RISING WATER. DO NOT ATTEMPT TO DRIVE THROUGH FLOODED ROADWAYS.
What forecasters said that day
The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
In the hours before
Special weather statement, Oct 3, 8:24 PM EDT, 42 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PITTSBURGH, PA 820 PM EDT SAT OCT 03 1986 ...HEAVY SHOWERS AND THUNDERSTORMS MOVING ACROSS WESTERN PENNSYLVANIA... AT 815PM PITTSBURGH WEATHER RADAR SHOWED A LARGE AREA OF MODERATE TO HEAVY RAIN ABOUT 25 MILES WIDE WITH THUNDERSTORMS STRECHING FROM JEFFERSON COUNTY WESTWARD ACROSS CLARION..NORTHERN ARMSTRONG..BUTLER SOUTHERN MERCER AND LAWRENCE COUNTIES. A FLOOD WATCH IS IN EFFECT FOR THESE COUNTIES TIL 10PM. THESE STORMS WILL CONTAIN HEAVY DOWNPOURS THAT COULD CAUSE FLOODING OF STREAMS AND CREEKS..POWER OUTAGES..DANGEROUS LIGHTNING..HAIL AND DAMAGING WINDS. THE LEADING EDGE OF THE HEAVY RAIN WILL MOVE INTO CLEARFIELD COUNTY AROUND 830PM AMD COULD RESULT IN FURTHER FLOODING ALONG STREAMS IN CLEARFIELD COUNTY WHERE A FLOOD WARNING REMAINS IN EFFECT AND MAY HAVE TO BE EXTENDED BEYOND 10PM. SCATTERED SHOWERS AND THUNDERSTORMS MOVING ACROSS THE WEST VIRGINIA PANHANDLE WILL MOVE INTO SOUTHWESTERN PENNSYLVANIA AFTER 9PM. BE ALERT FOR ANY THREATENING WEATHER. SISK
The office that day
Everything else NWS Pittsburgh, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 3, 9:06 PM EDT | Flash Flood Warning | PBZ | Clearfield | 4 hr |
Nearby
Flash Flood Warnings in Pennsylvania, 1986Every flash flood warning in 1986
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.