Alert archive / Pennsylvania / Flash Flood Warnings in 1998
Flash Flood Warning 32, NWS Pittsburgh, PA
NWS Pittsburgh, PA issued this flash flood warning at Apr 9, 1998, 1:45 PM EDT for Jefferson County, Pennsylvania. It was in force for 4 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Apr 9, 1998, 1:45 PM EDT (17:45 UTC)
- Expired
- Apr 9, 1998, 5:45 PM EDT
- In force
- 4 hr
- Issued by
- NWS Pittsburgh, PA
- Area
- Whole counties
County Jefferson County, PA
The nearest sounding before it
Pittsburgh, PA (KPIT), launched 12:00Z, 5.8 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 597 m above ground
- 0-6 km bulk shear
- 65 kt
- 0-1 km storm-relative helicity
- 154 m²/s²
- 0-3 km storm-relative helicity
- 357 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 KPIT 091750 FFWPIT PAC065-092145- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE PITTSBURGH PA 145 PM EDT THU APR 9 1998 THE NATIONAL WEATHER SERVICE IN PITTSBURGH HAS ISSUED A FLASH FLOOD WARNING EFFECTIVE UNTIL 545 PM EDT FOR THE FOLLOWING LOCATION... IN WEST PENNSYLVANIA ...JEFFERSON COUNTY AREAS OF HEAVY RAIN HAVE PRODUCED RAINFALL RATES OF OVER AN INCH IN AN HOUR ACROSS PARTS OF JEFFERSON COUNTY. RADAR INDICATES THAT ADDITION RAINFALL WILL BE SUFFICIENT TO CAUSE FLOODING. 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 OR LOW SPOTS IF WATER COVERS T$HE ROAD. 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, Apr 9, 11:10 AM EDT, 2 hours 35 minutes before
MDZ001-OHZ039>041-048>050-057>059-068-069-PAZ007>009-013>016-020>023- 029>032-WVZ001>004-012-021>023-041-092000- SPECIAL WEATHER STATEMENT...SEVERE THUNDERSTORM POTENTIAL NATIONAL WEATHER SERVICE PITTSBURGH PA 1110 AM EDT THU APR 9 1998 THE NATIONAL WEATHER SERVICE IN PITTSBURGH SAYS THERE IS THE POTENTIAL FOR SEVERE THUNDERSTORMS TO DEVELOP THIS AFTERNOON ACROSS EAST CENTRAL OHIO...NORTHERN WEST VIRGINIA...EXTREME WESTERN MARYLAND...AND SOUTHWESTERN PENNSYLVANIA. THE BIGGEST THREATS WILL BE LARGE HAIL AND DAMAGING WINDS. IN ADDITION... SINCE THE GROUND IS ALREADY VERY WET ACROSS THESE AREAS...THE HEAVY RAIN ASSOCIATED WITH THESE THUNDERSTORMS COULD POSE SOME LOCALIZED FLOODING PROBLEMS. ...WEATHER EXPLANATION... AN UPPER-LEVEL LOW LOCATED IN CENTRAL INDIANA THIS MORNING WILL BEGIN TO MOVE QUICKLY TO THE EAST THIS AFTERNOON. THIS COLD AIR ALOFT... COMBINED WITH ANY SURFACE HEATING WE MAY RECEIVE TODAY...WILL COMBINE TO PRODUCE THUNDERSTORMS. THIS UPPER-LEVEL LOW IS EXPECTED TO PASS EAST OF OUR AREA THIS EVENING...BRINGING AN END TO THE SEVERE THUNDERSTORM THREAT. STAY TUNED TO NOAA WEATHER RADIO FOR UPDATES ON THIS POTENTIALLY HAZARDOUS SITUATION. CHECK OUT OUR WEB SITE AT WWW.NWS.NOAA.GOV/ER/PIT STRAGER
Special weather statement, Apr 9, 11:10 AM EDT, 2 hours 35 minutes before
MDZ001-OHZ039>041-048>050-057>059-068-069-PAZ007>009-013>016-020>023- 029>032-WVZ001>004-012-021>023-041-092000- SPECIAL WEATHER STATEMENT...SEVERE THUNDERSTORM POTENTIAL NATIONAL WEATHER SERVICE PITTSBURGH PA 1110 AM EDT THU APR 9 1998 THE NATIONAL WEATHER SERVICE IN PITTSBURGH SAYS THERE IS THE POTENTIAL FOR SEVERE THUNDERSTORMS TO DEVELOP THIS AFTERNOON ACROSS EAST CENTRAL OHIO...NORTHERN WEST VIRGINIA...EXTREME WESTERN MARYLAND...AND SOUTHWESTERN PENNSYLVANIA. THE BIGGEST THREATS WILL BE LARGE HAIL AND DAMAGING WINDS. IN ADDITION... SINCE THE GROUND IS ALREADY VERY WET ACROSS THESE AREAS...THE HEAVY RAIN ASSOCIATED WITH THESE THUNDERSTORMS COULD POSE SOME LOCALIZED FLOODING PROBLEMS. ...WEATHER EXPLANATION... AN UPPER-LEVEL LOW LOCATED IN CENTRAL INDIANA THIS MORNING WILL BEGIN TO MOVE QUICKLY TO THE EAST THIS AFTERNOON. THIS COLD AIR ALOFT... COMBINED WITH ANY SURFACE HEATING WE MAY RECEIVE TODAY...WILL COMBINE TO PRODUCE THUNDERSTORMS. THIS UPPER-LEVEL LOW IS EXPECTED TO PASS EAST OF OUR AREA THIS EVENING...BRINGING AN END TO THE SEVERE THUNDERSTORM THREAT. STAY TUNED TO NOAA WEATHER RADIO FOR UPDATES ON THIS POTENTIALLY HAZARDOUS SITUATION. CHECK OUT OUR WEB SITE AT WWW.NWS.NOAA.GOV/ER/PIT STRAGER
The office that day
Everything else NWS Pittsburgh, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 9, 10:09 AM EDT | Severe Thunderstorm Warning | PBZ | Westmoreland | 51 min |
Nearby
Flash Flood Warnings in Pennsylvania, 1998Every flash flood warning in 1998
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.