Alert archive / Pennsylvania / Flash Flood Warnings in 1990
Flash Flood Warning 24, NWS State College, PA
NWS State College, PA issued this flash flood warning at Oct 23, 1990, 7:09 PM EDT for York County, Pennsylvania. It was in force for 3 hr.
The area
The counties it named.
The facts
- Issued
- Oct 23, 1990, 7:09 PM EDT (23:09 UTC)
- Expired
- Oct 23, 1990, 10:15 PM EDT
- In force
- 3 hr
- Issued by
- NWS State College, PA
- Area
- Whole counties
County York 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 12:00Z, 11.2 hours before the alert went out and 122 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
- 345 J/kg
- Mixed-layer CIN
- -493 J/kg
- Mixed-layer LCL
- 548 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- 206 m²/s²
- 0-3 km storm-relative helicity
- 234 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KHAR 232309 RRA
FFWHAR
PAC109-119-133-240215-
BULLETIN - EBS ACTIVATION REQUESTED
SMALL STREAM AND URBAN FLOOD WARNING
NATIONAL WEATHER SERVICE HARRISBURG PA
709 PM EDT TUE OCT 23 1990
THE NATIONAL WEATHER SERVICE IN HARRISBURG HAS ISSUED A
SMALL STREAM AND URBAN FLOOD WARNING EFFECTIVE UNTIL 1015 PM EDT
FOR PEOPLE IN THE FOLLOWING COUNTIES...
IN CENTRAL PENNSYLVANIA
...SNYDER...UNION
IN SOUTH CENTRAL PENNSYLVANIA
...YORK
AT 700PM WEATHER SERVICE RADAR IN HARRISBURG INDICATED WIDELY
SCATTERED LIGHT TO MODERATE RAINSHOWERS OVER THE LOWER SUSQUEHANNA
VALLEY...NORTHCENTRAL PENNSYLVANIA...AND PORTIONS OF EASTERN
PENNSYLVANIA. REPORTS FROM EMERGENCY MANAGEMENT CENTERS IN
UNION...YORK...AND SYNDER COUNTIES INDICATE THAT MOST CREEKS LOCATED
IN THOSE AREAS ARE BANKFULL AND SOME STREET FLOODING HAS OCCURRED.
ALTHOUGH THE RAIN HAS ENDED IN SOME AREAS...ADDITIONAL WATERS UPSTREAM
OF THE CREEKS MAY CAUSE ADDITIONAL FLOODING.
THE RAINSHOWERS WERE MOVING TOWARDS THE NORTHEAST AT 15 TO 10 MILES AN
HOUR.
A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING OR IS
IMMINENT. MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES. DO NOT
ATTEMPT TO CROSS BRIDGES...DIPS...OR LOW SP#OTS IF WATER COVERS
THE ROADWAY. NEVER TRY TO CROSS A FLOWING STREAM...EVEN A SMALL
ONE...ON FOOT. TO ESCAPE RISING WATER MOVE UP TO HIGHER GROUND.
WSO HAR CRUZWhat 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 23, 2:52 PM EDT, 4 hours 17 minutes before
PAZ008-009-232100- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE HARRISBURG PA. 300 PM EDT TUE OCT 23 1990 ...A SMALL STREAM FLOOD WATCH REMAINS IN EFFECT... AT 245 PM MOST AREAS OF CENTRAL PENNSYLVANIA CONTINUED TO RECIEVE LIGHT TO MODERATE RAIN. THE RAIN HAS BEEN SPREAD OVER ENOUGH TIME THAT ONLY MINOR FLOODING OF SMALL CREEKS HAS OCCURRED SO FAR. THE SMALL STREAM FLOOD WATCH WILL REMAIN IN EFFECT UNTIL LATE THIS EVENING AS RAIN IS EX$PECTED TO CONTINUE AND MOST AREA STREAMS ARE NEAR FULL NOW. RAIN WILL CONTINUE OVER THE WATCH AREA UNTIL LATE THIS EVENING. STAY TUNED TO NOAA WEATHER RADIO...OR YOUR LOCAL RADIO OR TV STATION FOR FURTHER INFORMATION ON THIS RAIN EVENT. TK
The office that day
Everything else NWS State College, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 23, 3:03 PM EDT | Flash Flood Warning | CTP | Lycoming, Sullivan | 6 hr |
| Oct 23, 3:05 PM EDT | Flash Flood Warning | CTP | Huntingdon | 3 hr |
| Oct 23, 3:19 PM EDT | Flash Flood Warning | CTP | York | 4 hr |
| Oct 23, 3:31 PM EDT | Flash Flood Warning | CTP | Mifflin | 4 hr |
| Oct 23, 3:40 PM EDT | Flash Flood Warning | CTP | Bradford, Tioga | 5 hr |
| Oct 23, 4:00 PM EDT | Flash Flood Warning | CTP | Union | 4 hr |
| Oct 23, 7:09 PM EDT | Flash Flood Warning | CTP | Snyder, Union | 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.