Alert archive / Pennsylvania / Flash Flood Warnings in 1987
Flash Flood Warning 4, NWS State College, PA
NWS State College, PA issued this flash flood warning at Sep 12, 1987, 8:20 PM EDT for Cumberland County, Pennsylvania. It was in force for 4 hr.
The area
The counties it named.
The facts
- Issued
- Sep 12, 1987, 8:20 PM EDT (00:20 UTC)
- Expired
- Sep 13, 1987, 12:20 AM EDT
- In force
- 4 hr
- Issued by
- NWS State College, PA
- Area
- Whole counties
County Cumberland 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
Washington/Dulle, VA (KIAD), launched 00:00Z, 0.3 hours before the alert went out and 135 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
- 575 J/kg
- Mixed-layer CIN
- -1 J/kg
- Mixed-layer LCL
- 518 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 95 m²/s²
- 0-3 km storm-relative helicity
- 105 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.8
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KHAR 130022
FFWHAR
PAC041-130420-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE HARRISBURG PA
820 PM EDT SAT SEP 12 1987
THE NATIONAL WEATHER SERVICE HAS ISSUED A FLASH FLOOD WARNING
EFFECTIVE UNTIL 1220 AM EDT FOR THE FOLLOWING COUNTY OF
SOUTH CENTRAL PENNSYLVANIA... CUMBERLAND
THE NATIONAL WEATHER SERVICE HAS ISSUED A FLASH FLOOD WARNING FOR
CUMBERLAND COUNTY. RAINFALL AMOUNTS OF 1.50 INCHES TO 3.50 INCHES
HAVE BEEN REPORTED DURING THE PAST HOUR.THE CONODOGUINET CREEK
IS NOW 5.90 FEET AND IS EXPECTED TO REACH BETWEEN 10 AND 11 FEET
SUNDAY MORNING.
A FLASH FLOOD WARNING MEANS FLOODING IN OCCURRING OR IS IMMINENT.
IF YOU GET ANY INDICATION THAT FLOOD WATERS ARE APPROACHING MOVE TO
HIGHER GROUND IMMEDIATELY. DO NOT DRIVE THROUGH FLOOUD WATERS.
DO NOT WADE THROUGH FLOOD WATERS.
PNWhat 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, Sep 12, 8:13 PM EDT, 7 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HARRISBURG PA.
815 PM EDT SAT SEP 12 1987
...HEAVY RAINS PRODUCE STREET AND BASEMENT FLOODING IN CUMBERLAND
COUNTY...
RADAR SHOWED A HEAVY THUNDERSTORM THAT MOVED THROUGH CUMBERLAND COUNTY
DURING THE PAST HOUR.
WE HAVE RECEIVED NUMEROUS REPORTS OF STREET AND BASEMENT FLOODING AND
HIGHWAY FLOODING IN MANY AREAS OF THE COUNTY BY THE COUNTY DISPATCHER.
RAINFALL AMOUNTS OF 1.50 INCHES TEO 2.50 INCHES HAVE BEEN REPORTED BY
MANY RAINFALL OBSERVERS.
THIS THUNDERSTORM WILL BE MOVING OUT OF CUMBERLAND COUNTY AND INTO DAUPHIN
COUNTY BY 830 PM EDT.
REMEMBER...DO NOT DRIVE THROUGH FLOODED ROADWAYS.
WSO HAR NEFFThe office that day
Everything else NWS State College, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 12, 8:44 PM EDT | Flash Flood Warning | CTP | Dauphin | 4 hr |
| Sep 12, 9:56 PM EDT | Flash Flood Warning | CTP | Cumberland | 6 hr |
Nearby
Flash Flood Warnings in Pennsylvania, 1987Every flash flood warning in 1987
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.