Alert archive / Pennsylvania / Flash Flood Warnings in 1993
Flash Flood Warning 37, NWS State College, PA
NWS State College, PA issued this flash flood warning at Jun 20, 1993, 6:41 PM EDT for Dauphin County, Pennsylvania. It was in force for 2 hr.
The area
The counties it named.
The facts
- Issued
- Jun 20, 1993, 6:41 PM EDT (22:41 UTC)
- Expired
- Jun 20, 1993, 8:45 PM EDT
- In force
- 2 hr
- Issued by
- NWS State College, PA
- Area
- Whole counties
County Dauphin County, PA
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 10.7 hours before the alert went out and 171 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
- 541 J/kg
- Mixed-layer CIN
- -115 J/kg
- Mixed-layer LCL
- 993 m above ground
- 0-6 km bulk shear
- 7 kt
- 0-1 km storm-relative helicity
- 4 m²/s²
- 0-3 km storm-relative helicity
- 49 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 202242 FFWHAR PAC043-210045- BULLETIN - EBS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE HARRISBURG PA 641 PM EDT SUN JUN 20 1993 THE NATIONAL WEATHER SERVICE IN HARRISBURG HAS ISSUED A FLASH FLOOD WARNING EFFECTIVE UNTIL 845 PM EDT FOR PEOPLE IN THE FOLLOWING LOCATION...... IN SOUTH CENTRAL PENNSYLVANIA ...DAUPHIN COUNTY THUNDERSTORMS HAVE DROPPED A MEASURED 3.5 INCHES OF RAIN IN A HALF HOUR PERIOD OF TIME JUST EAST OF DUNCANNON IN SPEECEVILLE...ACCORDING TO A SKYWARN OBSERVER. DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR 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, Jun 20, 5:04 PM EDT, 1 hour 37 minutes before
PAZ006-013-009-008-202200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE HARRISBURG PA 503 PM EDT SUN JUN 20 1993 ...SEVERE THUNDERSTORM WATCH FOR THE SUSQUEHANNA REGION AND CENTRAL MOUNTAINS TILL 9PM... ...SEVERE THUNDERSTORM WARNING FOR FRANKLIN COUNTY UNTIL 545 PM... AT 500 PM NATIONAL WEATHER SERVICE RADAR IN HARRISBURG SHOWED A LINE OF SCATTERED THUNDERSTORMS ALONG AND WEST OF A LINE FROM HAZELTON TO MARTINSBURG WEST VIRGINIA. THE LINE WAS MOVING NORTHEAST AT 25 MILES AN HOUR. THE STRONGEST STORMS ON RADAR WERE IN PERRY COUNTY AND SOUTHERN FRANKLIN COUNTY. THIS STORM HAS PRODUCED DAMAGING WINDS IN NORTHERN MARYLAND. OTHER STRONG THUNDERSTORMS WERE IN NORTHERN MARYLAND AND WILL LIKELY MOVE INTO ADAMS COUNTY BY 530 PM. THE STORM IN PERRY COUNTY... ON ITS CURRENT COURSE AND SPEED... WILL MOVE INTO NORTHERN DAUPHIN COUNTY BY 530. GUSTS TO 45 MILES AN HOUR AND SMALL HAIL CAN BE EXPECTED WITH THESE STORMS. HEAVY RAINFALL WAS ALSO ASSOCIATED WITH THESE STORMS. FLOODING OF POOR DRAINAGE SYSTEMS IS POSSIBLE. SEVERE THUNDERSTORMS PRODUCE WIND IN EXCESS OF 58 MILES AN HOUR AND HAIL GREATER THAN DIME SIZE. IF THREATENING WEATHER APPROACHES SEEK SHELTER IMMEDVIATELY IN A REINFORCED BUILDING. FENNER
Special weather statement, Jun 20, 6:00 PM EDT, 41 minutes before
PAZ007-008-014-202300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WILLIAMSPORT PA 500 PM EDT SUN JUN 20 1993 ...SEVERE THUNDERSTORM WATCH UNTIL 900 PM EDT FOR ALL OF NORTHCENTRAL PENNSYLVANIA... ...THUNDERSTORMS MOVING OUT OF NORTHCENTRAL PENNSYLVANIA... ...WATCH INFORMATION... A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 900 PM EDT FOR ALL OF NORTHCENTRAL PENNSYLVANIA. THE WATCH INCLUDES...BRADFORD...CLINTON ...LYCOMING AND SULLIVAN COUNTIES. THE WATCH ALSO INCLUDES ALL COUNTIES IN THE MIDDLE SUSQUEHANNA VALLEY. ...RADAR INFORMATION... AT 600 PM EDT NATIONAL WEATHER SERVICE RADAR INDICATED AN AREA OF SHOWERS AND THUNDERSTORMS MOVING INTO EASTERN PENNSYLVANIA. THE TRAILING EDGE OF THIS AREA OF PRECIPITATION EXTENDED FROM WYLUSING IN BRADFORD COUNTY TO FRACKVILLE IN SCHUYLKILL COUNTY. OTHER NEW DEVELOPED THUNDERSTORMS NORTHWEST OF COUDERSPORT AND JUST NORTH OF EMPORIUM IN POTTER COUNTY. THE THUNDERSTORMS WERE MOVING EAST NORTHEAST AT 25 MPH. THE THUNDERSTORMS TO OUR EAST WILL BE MOVING OUT OF NORTHCENTRAL PENNSYLVANIA BY 630 PM EDT. THE THUNDERSTORMS OVER POTTER COUNTY WILL BE MOVING INTO TIOGA COUNTY BY 7 PM EDT. ...SAFETY TIPS... A SEVERE THUNDERSTORM WATCH MEANS SEVERE THUNDERSTORMS ARE POSSIBLE. SEVERE THUNDERSTORMS CAN DEVELOP SUDDENLY AND SOMETIMES NO ADVANCE WARNING IS POSSIBLE. IF THUNDERSTORMS APPROACH...SEEK SHELTER INSIDE A STRONG BUILDING. STAY AWAY FROM WINDOWS. LISTEN TO NOAA WEATHER RADIO FOR LATER STATEMENTS OR WARNINGS FROM THE NATIONAL WEATHER SERVICE. JSN/FJG
Special weather statement, Jun 20, 6:00 PM EDT, 41 minutes before
PAZ007-008-014-202300- SPECIAL WEATHER STATEMENT...CORRECTION TO TRANSMITION TIME NATIONAL WEATHER SERVICE WILLIAMSPORT PA 600 PM EDT SUN JUN 20 1993 ...SEVERE THUNDERSTORM WATCH UNTIL 900 PM EDT FOR ALL OF NORTHCENTRAL PENNSYLVANIA... ...THUNDERSTORMS MOVING OUT OF NORTHCENTRAL PENNSYLVANIA... ...WATCH INFORMATION... A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 900 PM EDT FOR ALL OF NORTHCENTRAL PENNSYLVANIA. THE WATCH INCLUDES...BRADFORD...CLINTON ...LYCOMING AND SULLIVAN COUNTIES. THE WATCH ALSO INCLUDES ALL COUNTIES IN THE MIDDLE SUSQUEHANNA VALLEY. ...RADAR INFORMATION... AT 600 PM EDT NATIONAL WEATHER SERVICE RADAR INDICATED AN AREA OF SHOWERS AND THUNDERSTORMS MOVING INTO EASTERN PENNSYLVANIA. THE TRAILING EDGE OF THIS AREA OF PRECIPITATION EXTENDED FROM WYLUSING IN BRADFORD COUNTY TO FRACKVILLE IN SCHUYLKILL COUNTY. OTHER NEW DEVELOPED THUNDERSTORMS NORTHWEST OF COUDERSPORT AND JUST NORTH OF EMPORIUM IN POTTER COUNTY. THE THUNDERSTORMS WERE MOVING EAST NORTHEAST AT 25 MPH. THE THUNDERSTORMS TO OUR EAST WILL BE MOVING OUT OF NORTHCENTRAL PENNSYLVANIA BY 630 PM EDT. THE THUNDERSTORMS OVER POTTER COUNTY WILL BE MOVING INTO TIOGA COUNTY BY 7 PM EDT. ...SAFETY TIPS... A SEVERE THUNDERSTORM WATCH MEANS SEVERE THUNDERSTORMS ARE POSSIBLE. SEVERE THUNDERSTORMS CAN DEVELOP SUDDENLY AND SOMETIMES NO ADVANCE WARNING IS POSSIBLE. IF THUNDERSTORMS APPROACH...SEEK SHELTER INSIDE A STRONG BUILDING. STAY AWAY FROM WINDOWS. LISTEN TO NOAA WEATHER RADIO FOR LATER STATEMENTS OR WARNINGS FROM THE NATIONAL WEATHER SERVICE. JSN/FJG
Special weather statement, Jun 20, 6:19 PM EDT, 22 minutes before
PAZ006-013-009-008-202300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE HARRISBURG PA 620 PM EDT SUN JUN 20 1993 ...SEVERE THUNDERSTORM WATCH FOR THE SUSQUEHANNA REGION AND CENTRAL MOUNTAINS TILL 9PM... ...SEVERE THUNDERSTORM WARNING FOR CUMBERLAND AND DAUPHIN COUNTY UNTIL 715PM... SEVERE THUNDERSTORM WARNINGS FOR PERRY AND FRANKLIN COUNTY HAVE EXPIRED. AMATEUR RADIO OPERATORS IN FRANKLIN COUNTY REPORTED HALF INCH HAIL IN CHAMBERSBURG. SMALL TREE LIMBS WERE ALSO BROUGHT DOWN IN THE STORM. SPOTTERS IN CENTRAL PERRY COUNTY REPORTED PEA SIZE HAIL WITH THE PASSAGE OF A STRONG THUNDERSTORM. TREES WERE BROUGHT DOWN ON WIRES IN PERRY COUNTY AS THE STORM BECAME SEVERE. WINDS GUSTED TO 43 KNOTS OR 49 MILES AN HOUR AT THE NATIONAL WEATHER SERVICE IN HARRISBURG AS THE PERRY COUNTY STORM PASSED THROUGH THE DOWNTOWN HARRISBURG AREA. AT 620 PM NATIONAL WEATHER SERVICE RADAR IN HARRISBURG SHOWED STRONG THUNDERSTORMS IN ADAMS AND CUMBERLAND COUNTY. ANOTHER STORM WAS IN SOUTHERN AND CENTRAL DAUPHIN COUNTY. STORMS THIS EVENING WILL LIKELY PRODUCE SMALL HAIL AND WINDS TO 50 MILES AN HOUR. GIVEN THE SLOW NATURE OF THESE STORMS... FLOODING OF POOR DRAINAGE AREAS IS POSSIBLE. SEVERE THUNDERSTORMS PRODUCE WIND IN EXCESS OF 58 MILES AN HOUR AND HAIL GREATER THAN DIME SIZE. IF THREATENING WEATHER APPROACHES SEEK SHELTER IMMEDIATELY IN A REINFORCED BUILDING. FENNER
Special weather statement, Jun 20, 6:20 PM EDT, 21 minutes before
PAZ006-013-009-008-202300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE HARRISBURG PA 620 PM EDT SUN JUN 20 1993 ...SEVERE THUNDERSTORM WATCH FOR THE SUSQUEHANNA REGION AND CENTRAL MOUNTAINS TILL 9PM... ...SEVERE THUNDERSTORM WARNING FOR CUMBERLAND AND DAUPHIN COUNTY UNTIL 715PM... SEVERE THUNDERSTORM WARNINGS FOR PERRY AND FRANKLIN COUNTY HAVE EXPIRED. AMATEUR RADIO OPERATORS IN FRANKLIN COUNTY REPORTED HALF INCH HAIL IN CHAMBERSBURG. SMALL TREE LIMBS WERE ALSO BROUGHT DOWN IN THE STORM. SPOTTERS IN CENTRAL PERRY COUNTY REPORTED PEA SIZE HAIL WITH THE PASSAGE OF A STRONG THUNDERSTORM. TREES WERE BROUGHT DOWN ON WIRES IN PERRY COUNTY AS THE STORM BECAME SEVERE. WINDS GUSTED TO 43 KNOTS OR 49 MILES AN HOUR AT THE NATIONAL WEATHER SERVICE IN HARRISBURG AS THE PERRY COUNTY STORM PASSED THROUGH THE DOWNTOWN HARRISBURG AREA. AT 620 PM NATIONAL WEATHER SERVICE RADAR IN HARRISBURG SHOWED STRONG THUNDERSTORMS IN ADAMS AND CUMBERLAND COUNTY. ANOTHER STORM WAS IN SOUTHERN AND CENTRAL DAUPHIN COUNTY. STORMS THIS EVENING WILL LIKELY PRODUCE SMALL HAIL AND WINDS TO 50 MILES AN HOUR. GIVEN THE SLOW NATURE OF THESE STORMS... FLOODING OF POOR DRAINAGE AREAS IS POSSIBLE. SEVERE THUNDERSTORMS PRODUCE WIND IN EXCESS OF 58 MILES AN HOUR AND HAIL GREATER THAN DIME SIZE. IF THREATENING WEATHER APPROACHES SEEK SHELTER IMMEDIATELY IN A REINFORCED BUILDING. FENNER
Special weather statement, Jun 20, 6:24 PM EDT, 17 minutes before
PAZ007-008-014-202300- SPECIAL WEATHER STATEMENT...CORRECTION TO TRANSMITION TIME NATIONAL WEATHER SERVICE WILLIAMSPORT PA 600 PM EDT SUN JUN 20 1993 ...SEVERE THUNDERSTORM WATCH UNTIL 900 PM EDT FOR ALL OF NORTHCENTRAL PENNSYLVANIA... ...THUNDERSTORMS MOVING OUT OF NORTHCENTRAL PENNSYLVANIA... ...WATCH INFORMATION... A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 900 PM EDT FOR ALL OF NORTHCENTRAL PENNSYLVANIA. THE WATCH INCLUDES...BRADFORD...CLINTON ...LYCOMING AND SULLIVAN COUNTIES. THE WATCH ALSO INCLUDES ALL COUNTIES IN THE MIDDLE SUSQUEHANNA VALLEY. ...RADAR INFORMATION... AT 600 PM EDT NATIONAL WEATHER SERVICE RADAR INDICATED AN AREA OF SHOWERS AND THUNDERSTORMS MOVING INTO EASTERN PENNSYLVANIA. THE TRAILING EDGE OF THIS AREA OF PRECIPITATION EXTENDED FROM WYLUSING IN BRADFORD COUNTY TO FRACKVILLE IN SCHUYLKILL COUNTY. OTHER NEW DEVELOPED THUNDERSTORMS NORTHWEST OF COUDERSPORT AND JUST NORTH OF EMPORIUM IN POTTER COUNTY. THE THUNDERSTORMS WERE MOVING EAST NORTHEAST AT 25 MPH. THE THUNDERSTORMS TO OUR EAST WILL BE MOVING OUT OF NORTHCENTRAL PENNSYLVANIA BY 630 PM EDT. THE THUNDERSTORMS OVER POTTER COUNTY WILL BE MOVING INTO TIOGA COUNTY BY 7 PM EDT. ...SAFETY TIPS... A SEVERE THUNDERSTORM WATCH MEANS SEVERE THUNDERSTORMS ARE POSSIBLE. SEVERE THUNDERSTORMS CAN DEVELOP SUDDENLY AND SOMETIMES NO ADVANCE WARNING IS POSSIBLE. IF THUNDERSTORMS APPROACH...SEEK SHELTER INSIDE A STRONG BUILDING. STAY AWAY FROM WINDOWS. LISTEN TO NOAA WEATHER RADIO FOR LATER STATEMENTS OR WARNINGS FROM THE NATIONAL WEATHER SERVICE. JSN/FJG
The office that day
Everything else NWS State College, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 19, 9:31 PM EDT | Severe Thunderstorm Warning | CTP | Sullivan | 29 min |
| Jun 20, 1:56 PM EDT | Severe Thunderstorm Warning | CTP | Centre | 64 min |
| Jun 20, 2:36 PM EDT | Severe Thunderstorm Warning | CTP | Lycoming | 54 min |
| Jun 20, 4:45 PM EDT | Severe Thunderstorm Warning | CTP | Franklin | 60 min |
| Jun 20, 5:15 PM EDT | Severe Thunderstorm Warning | CTP | Perry | 60 min |
| Jun 20, 6:10 PM EDT | Severe Thunderstorm Warning | CTP | Cumberland, Dauphin | 65 min |
| Jun 20, 6:36 PM EDT | Severe Thunderstorm Warning | CTP | York | 69 min |
| Jun 20, 7:05 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster | 55 min |
Nearby
Flash Flood Warnings in Pennsylvania, 1993Every flash flood warning in 1993
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.