Alert archive / Pennsylvania / Flash Flood Warnings in 1990
Flash Flood Warning 31, NWS Cleveland, OH
NWS Cleveland, OH issued this flash flood warning at Jul 15, 1990, 1:59 AM EDT for Mercer County, Pennsylvania. It was in force for 2 hr.
The area
The counties it named.
The facts
- Issued
- Jul 15, 1990, 1:59 AM EDT (05:59 UTC)
- Expired
- Jul 15, 1990, 4:00 AM EDT
- In force
- 2 hr
- Issued by
- NWS Cleveland, OH
- Area
- Whole counties
County Mercer 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, 6.0 hours before the alert went out and 100 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
- 196 J/kg
- Mixed-layer CIN
- -12 J/kg
- Mixed-layer LCL
- 784 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 123 m²/s²
- 0-3 km storm-relative helicity
- 187 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 0.9
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KYNG 150600
FFWYNG
PAC085-150800-
BULLETIN - EBS ACTIVATION REQUESTED
SMALL STREAM AND URBAN FLOOD WARNING
NATIONAL WEATHER SERVICE YOUNGSTOWN OH
159 AM EDT SUN JUL 15 1990
THE NATIONAL WEATHER SERVICE IN YOUNGSTOWN HAS ISSUED A
SMALL STREAM AND URBAN FLOOD WARNING EFFECTIVE UNTIL 400 AM EDT
FOR PEOPLE IN THE FOLLOWING COUNTY...
IN NORTHWEST PENNSYLVANIA
...MERCER
AT 145 AM EDT WEATHER RADAR SHOWED RAINFALL AMOUNTS OF 1.5 INCHES
IN THE PAST TWO AND A HALF HOURS OVER THE WESTERN PORTIONS OF THE
COUNTY. ADDITIONAL HEAVY RAINFALL IS EXPECTED OVER THE NEXT FEW HOURS.
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR cCAR TO
CROSS SAFELY. VEHICLES CAUGHT IN RISING WATER SHOULD BE
ABANDONED QUICKLY. MOVE TO HIGHER GROUND.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, Jul 14, 8:40 PM EDT, 5 hours 19 minutes before
OHZ004-007-150200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE AKRON CANTON OH 840 PM EDT SAT JUL 14 1990 HEAVY RAINS WERE FALLING ON PARTS OF EASTERN OHIO THIS EVENING. AT 830 PM WEATHER SERVICE RADAR SHOWED A LINE OF THUNDERSTORMS WITH LOCALLY HEAVY RAIN OVER NORTHERN JEFFERSON... EASTERN CARROLL AND COLUMBINA COUNTIES. THE THUNDERSTORMS WERE MOVING NORTH AT 20 MPH. MANY STREAMS AND CREEKS IN THAT AREA OF OHIO WERE RUNNING AT NEAR BANKFULL... SO IF THE HEAVY RAIN LASTS MUCH LONGER THERE COULD BE SOME FLOODING. IF YOU LIVE NEAR A STREAM IN EASTERN OHIO... BE ESPECIALLY ALERT THIS EVENING. YOU MAY HAVE TO ACT QUICKLY IF FLOODING OCCURS. RN FK
Special weather statement, Jul 14, 9:47 PM EDT, 4 hours 12 minutes before
OHZ004-150400- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE YOUNGSTOWN OH 946 PM EDT SAT JUL 14 1990 HEAVY RAINS WERE FALLING OVER AREAS OF NORTHEAST OHIO THIS EVENING. AT 940 PM WEATHER SERVICE RADAR SHOWED AN AREA OF THUNDERSTORMS WITH LOCALLY HEAVY RAIN OVER COLUMBIANA AND MAHONING COUNTIES FROM YOUNGSTOWN TO EAST LIVERPOOL. THE THUNDERSTORMS WERE MOVING NORTH AT 30 MPH. MANY STREAMS AND CREEKS IN NORTHEAST OHIO WERE RUNNING AT NEAR BANKFULL AND FLOODING COULD RESULT IF THE HEAVY RAIN CONTINUES. IF YOU LIVE NEAR A STREAM IN NORTHEAST OHIO... BE ESPECIALLY ALERT THIS EVENING. YOU MAY HAVE TO ACT QUICKLY IF FLOODING OCCURS. SLA
The office that day
Everything else NWS Cleveland, OH issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 15, 1:07 AM EDT | Flash Flood Warning | CLE | Lawrence | 2 hr |
| Jul 15, 2:06 AM EDT | Flash Flood Warning | CLE | Crawford | 3 hr |
| Jul 15, 3:10 AM EDT | Flash Flood Warning | CLE | Lawrence, Mercer | 3 hr |
| Jul 15, 4:40 AM EDT | Flash Flood Warning | CLE | Venango | 3 hr |
| Jul 15, 5:26 AM EDT | Flash Flood Warning | CLE | Warren | 3 hr |
| Jul 15, 5:44 AM EDT | Flash Flood Warning | CLE | Crawford | 3 hr |
| Jul 15, 7:39 AM EDT | Flash Flood Warning | CLE | Crawford, Venango, Warren | 2 hr |
| Jul 15, 9:53 AM EDT | Flash Flood Warning | CLE | Crawford, Venango, Warren | 3 hr |
Nearby
Flash Flood Warnings in Pennsylvania, 1990Every flash flood warning in 1990
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.