Alert archive / Pennsylvania / Flash Flood Warnings in 1990
Flash Flood Warning 16, NWS State College, PA
NWS State College, PA issued this flash flood warning at Oct 18, 1990, 4:38 PM EDT for York County, Pennsylvania. It was in force for 2 hr.
The area
The counties it named.
The facts
- Issued
- Oct 18, 1990, 4:38 PM EDT (20:38 UTC)
- Expired
- Oct 18, 1990, 6:45 PM EDT
- In force
- 2 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, 8.6 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
- 8 J/kg
- Mixed-layer CIN
- -299 J/kg
- Mixed-layer LCL
- 702 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- 231 m²/s²
- 0-3 km storm-relative helicity
- 203 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 182039 RRA
FFWHAR
PAC133-182245-
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE HARRISBURG PA
438 PM EDT THU OCT 18 1990
THE NATIONAL WEATHER SERVICE IN HARRISBURG HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL 645 PM EDT
FOR PEOPLE IN THE FOLLOWING COUNTY...
IN SOUTH CENTRAL PENNSYLVANIA
...YORK
AT 435 PM PEMA OFFICIALS REPORTED VEERY HEAVY RAIN...FIRST FLOOR
FLOODING IN THE CITY OF YORK IN YORK COUNTY.
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 SPOTS 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.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 18, 11:59 AM EDT, 4 hours 39 minutes before
PAZ006-008-009-013-181800- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE HARRISBURG PA 1155 AM EDT THU 0CT 18 1990 ...SHOWERS AND GUSTY WINDS ARE MOVING INTO CENTRAL PENNSYLVANIA... GUSTY WINDS WILL ACCOMPANY THE SHOWERS AS THEY MOVE ACROSS THE STATE TODAY. STATE COLLEGE REPORTED A WIND GUST OF ABOUT 60 MILES AN HOUR AS SHOWERS WERE MOVING THROUGH...SHORTLY AFTER 1140 AM...AND GUSTS OF 40 TO 50 MILES AN HOUR WERE NOT UNCOMMON. AT 1129 AM EDT THE NATIONAL WEATHER SERVICE RADAR IN HARRISBURG WAS SHOWING SHOWERS OVER CENTRAL PENNSYLVANIA...THE WESTERN PANHANDLE OF MARYLAND... NORTHERN VIRGINIA...AND THE EXTREME NORTHEAST SECTIONS OF WEST VIRGINIA. MOST OF THE SHOWERS STRETCHED FROM THE NORTHERN MOUNTAINS...SOUTH ACROSS THE LAUREL AND CENTRAL MOUNTAINS...THE WESTERN PORTIONS OF THE SUSQUEHANNA VALLEY...THE WESTERN PANHANDLE OF MARYLAND AND DOWN INTO NORTHERN VIRGINIA. . THERE WERE ALSO A FEW AREAS OF HEAVY RAIN...MOST OF WHICH WERE IN A THIN LINE BETWEEN STATE COLLEGE AND MERCERSBURG. MOVEMENT OF THE SHOWERS WAS NORTHEAST AT ABOUT 55 MILES AN HOUR. WSO HAR RBH
Special weather statement, Oct 18, 12:57 PM EDT, 3 hours 41 minutes before
PAZ006-008-009-013-1818300- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE HARRISBURG PA 1250 PM EDT THU 0CT 18 1990 ...SHOWERS AND GUSTY WINDS ARE MOVING ACROSS CENTRAL PENNSYLVANIA... GUSTY WINDS WILL ACCOMPANY SHOWERS AS THEY MOVE ACROSS THE STATE THIS AFTERNOON. SHORTLY AFTER 1230 PM...STATE COLLEGE REPORTED A WIND GUST OF 74 MILES AN HOUR...AND NUMEROUS GUSTS OF 40 TO 50 MILES HAVE ALREADY BEEN REPORTED AS SHOWERS MOVED THROUGH CENTRAL AND WESTERN PENNSYLVANIA. AT 1230 PM EDT THE NATIONAL WEATHER SERVICE RADAR IN HARRISBURG WAS SHOWING SHOWERS OVER CENTRAL PENNSYLVANIA...THE WESTERN PANHANDLE OF MARYLAND... NORTHERN VIRGINIA...AND THE EXTREME NORTHEAST SECTIONS OF WEST VIRGINIA. MOST OF THE SHOWERS WERE OVER THE CENTRAL MOUNTAINS...THE SUSQUEHANNA VALLEY...THE WEST PANHANDLE OF MARYLAND AND PARTS OF NORTHERN VIRGINIA. THERE WERE ALSO A FEW AREAS OF HEAVY RAIN IN WESTERN CENTRE COUNTY AND ALSO IN A THINY LINE WHICH STRETCHED FROM LEWISTOWN SOUTH TO AROUND MERCERSBURG. . MOVEMENT OF THE SHOWERS WAS NORTHEAST AT ABOUT 55 MILES AN HOUR. WSO HAR RBH
Special weather statement, Oct 18, 1:35 PM EDT, 3 hours 3 minutes before
PAZ007-008-014-182130 SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WILLIAMSPORT PA 135 PM EDT THU OCT 18 1990 ...SOME HEAVY RAINS MOVING ACROSS PORTIONS OF NORTHCENTRAL PA... MODERATE TO HEAVY SHOWERS IN ADVANCE OF A COLD FRONT WERE MOVING ACROSS PORTIONS OF NORTHCENTRAL PA THIS AFTERNOON. THESE SHOWERS HAVE PRODUCED AROUND 1/2 INCH OF RAINFALL IN SOME AREAS OF LYCOMING COUNTY IN THE PAST 2 HOURS. SOME RAINFALL TOTALS IN LYCOMING COUNTY AS OF 130 PM EDT: BUTTONWOOD - .44 CAMMAL - .64 WHITE PINE - .56 WILLIAMSPORT-LYCOMING COUNTY AIRPORT - .45 TROUT RUN - .44 MODERATE TO HEAVY SHOWERS WILL CONTINUE ACROSS PARTS OF NORTHCENTRAL PA THROUGHOUT THE AFTERNOON..AS THE COLD FRONT APPROACHES AND MOVES THROUGH THE REGION. THE HEAVIER SHOWERS COULD CAUSE SOME SIGNIFICANT RISES ON RIVERS AND CREEKS IN THE AREA DURING THE AFTERNOON. WITH THE FLOODING THAT OCCURRED IN PARTS OF NORTHCENTRAL PA JUST SEVERAL DAYS AGO..WE WILL KEEP A CLOSE EYE ON THE SITUATION AND WILL KEEP YOU INFORMED. TG
Special weather statement, Oct 18, 1:48 PM EDT, 2 hours 50 minutes before
PAZ006-008-009-013-1819300- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE HARRISBURG PA 150 PM EDT THU 0CT 18 1990 ...SHOWERS AND GUSTY WINDS ARE MOVING ACROSS CENTRAL PENNSYLVANIA... GUSTY WINDS WILL ACCOMPANY SHOWERS AS THEY MOVE ACROSS THE STATE THIS AFTERNOON. SHORTLY AFTER 1230 PM...STATE COLLEGE REPORTED A WIND GUST OF 74 MILES AN HOUR...AND NUMEROUS GUSTS OF 40 TO 50 MILES HAVE ALREADY BEEN REPORTED AS SHOWERS MOVED THROUGH CENTRAL AND WESTERN PENNSYLVANIA. AT 127 PM EDT THE NATIONAL WEATHER SERVICE RADAR IN HARRISBURG WAS SHOWING SHOWERS OVER CENTRAL PENNSYLVANIA...CENTRAL MARYLAND AND NORTHERN VIRGINIA. MOST OF THE SHOWERS WERE OVER THE CENTRAL AND LAUREL MOUNTAINS...THE SUSQUEHANNA VALLEY...CENTRAL MARYLAND AND PARTS OF NORTHERN VIRGINIA. THERE WERE ALSO AN AREA OF HEAVY RAIN JUST NORTH OF STATE COLLEGE...AND A THIN LINE OF HEAVY RAIN WHICH STRETCHED FROM NEWPORT...IN EASTERN PERRY COUNTY...TO JUST WEST OF GETTYSBURG...IN SOUTHWEST ADAMS COUNTY. . MOVEMENT OF THE SHOWERS WAS NORTHEAST AT ABOUT 55 MILES AN HOUR. WSO HAR RBH
Special weather statement, Oct 18, 2:52 PM EDT, 1 hour 46 minutes before
PAZ006-008-009-013-181945- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE HARRISBURG PA 250 PM EDT THU 0CT 18 1990 ...SHOWERS AND GUSTY WINDS ARE MOVING ACROSS CENTRAL PENNSYLVANIA... GUSTY WINDS WILL ACCOMPANY SHOWERS AS THEY MOVE ACROSS THE STATE THIS AFTERNOON. SHORTLY AFTER 1230 PM...STATE COLLEGE REPORTED A WIND GUST OF 74 MILES AN HOUR...AND NUMEROUS GUSTS OF 40 TO 50 MILES HAVE ALSO BEEN REPORTED. AT 230 PM EDT THE NATIONAL WEATHER SERVICE RADAR IN HARRISBURG WAS SHOWING RAIN AND SHOWERS OVER MOST OF CENTRAL PENNSYLVANIA...NORTHERN MARYLAND AND NORTHERN VIRGINIA. THERE WERE ALSO A FEW AREAS OF VERY HEAVY RAIN IN CENTRAL PENNSYLVANIA. A THIN LINE OF HEAVY SHOWERS EXTENDED FROM NORTH CENTRAL CENTRE COUNTY TO 20 MILES SOUTH OF RAYSTOWN LAKE IN SOUTHWEST HUNTINDON COUNTY. ANOTHER LINE OF HEAVY SHOWERS STRETCHED MIDDLEBURG...IN SOUTHERN SNYDER COUNTY... TO JUST NORTH OF GETTYSBURG...IN NORTHERN ADAMS COUNTY. . MOVEMENT OF THE SHOWERS WAS NORTHEAST AT ABOUT 50 MILES AN HOUR. WSO HAR RBH
Special weather statement, Oct 18, 3:43 PM EDT, 55 minutes before
PAZ006-008-009-013-181945- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE HARRISBURG PA 250 PM EDT THU 0CT 18 1990 ...SHOWERS AND GUSTY WINDS ARE MOVING ACROSS CENTRAL PENNSYLVANIA... GUSTY WINDS WILL ACCOMPANY SHOWERS AS THEY MOVE ACROSS THE STATE THIS AFTERNOON. SHORTLY AFTER 1230 PM...STATE COLLEGE REPORTED A WIND GUST OF 74 MILES AN HOUR...AND NUMEROUS GUSTS OF 40 TO 50 MILES HAVE ALSO BEEN REPORTED. AT 230 PM EDT THE NATIONAL WEATHER SERVICE RADAR IN HARRISBURG WAS SHOWING RAIN AND SHOWERS OVER MOST OF CENTRAL PENNSYLVANIA...NORTHERN MARYLAND AND NORTHERN VIRGINIA. THERE WERE ALSO A FEW AREAS OF VERY HEAVY RAIN IN CENTRAL PENNSYLVANIA. A THIN LINE OF HEAVY SHOWERS EXTENDED FROM NORTHCENTRAL CENTRE COUNTY TO 20 MILES SOUTH OF RAYSTOWN LAKE IN SOUTHWEST HUNTINDON COUNTY. ANOTHER LINE OF HEAVY SHOWERS STRETCHED MIDDLEBURG...IN SOUTHERN SNYDER COUNTY... TO JUST NORTH OF GETTYSBURG...IN NORTHERN ADAMS COUNTY@. . MOVEMENT OF THE SHOWERS WAS NORTHEAST AT ABOUT 55 MILES AN HOUR. WSO HAR RBH
The office that day
Everything else NWS State College, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 18, 12:40 PM EDT | Severe Thunderstorm Warning | CTP | Centre | 65 min |
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.