Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 327, NWS Cleveland, OH
NWS Cleveland, OH issued this severe thunderstorm warning at Jul 21, 1998, 8:20 PM EDT for Erie County, Pennsylvania. It was in force for 65 min. 1 report came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Jul 21, 1998, 8:20 PM EDT (00:20 UTC)
- Expired
- Jul 21, 1998, 9:25 PM EDT
- In force
- 65 min
- Issued by
- NWS Cleveland, OH
- Area
- Whole counties
County Erie County, PA
The radar
The Buffalo radar (KBUF), 145 km from the middle of the area, began a volume at 00:21 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 21, 8:53 PM EDT | Thunderstorm Wind | Countywide, PA | Numerous trees and power lines were downed, especially in the Edinboro area. |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
The nearest sounding before it
Buffalo Intl Airport, NY (KBUF), launched 00:00Z, 0.3 hours before the alert went out and 146 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
- 1898 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 130 m²/s²
- 0-3 km storm-relative helicity
- 257 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.4
The text
As transmitted, in the capitals the NWS used until 2016.
305 WUUS1 KCLE 220019 RRA SVRCLE PAC049-PAZ520-220125- BULLETIN - EAS ACTIVATION/IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE CLEVELAND OH 820 PM EDT TUE JUL 21 1998 THE NATIONAL WEATHER SERVICE IN CLEVELAND HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... ERIE COUNTY PA INCLUDING ADJACENT COASTAL WATERS IN NORTHWESTERN PENNSYLVANIA * UNTIL 925 PM EDT * AT 819 PM EDT... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 17 MILES NORTH OF JEFFERSON MOVING EAST AT 40 MPH. * THE SEVERE THUNDERSTORM WILL MOVE NEAR... ALBION CRANESVILLE ERIE FRANKLIN CENTER SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS AND LARGE HAIL. GO INSIDE A STURDY BUILDING AND STAY AWAY FROM WINDOWS BARJENBRUCH
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Cleveland, OH wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 21, 2:45 AM EDT, 17 hours 35 minutes earlier.
Area forecast discussion, Jul 21, 2:45 AM EDT, 17 hours 35 minutes before
FORECAST COORDINATION MESSAGE NATIONAL WEATHER SERVICE WILMINGTON OH 245 AM EDT TUE JUL 21 1998 FORECAST CHALLENGE...CONVECTION POTENTIAL THROUGH PERIOD. AT THE MOMENT...IR AND RADAR IMAGERY SHOWING BOW ECHO IN SOUTHERN ONTARIO AND NORTHERN OH. SYSTEM WILL STAY WELL NORTH OF CWA. KILN AND KIWX SHOWING SOME A SMALL CLUSTER OF TSRA BETWEEN FWA AND LIMA WHICH ACCORDING TO LAPS DATA IS IN AN AREA OF MOISTURE CONVERGENCE. MODELS ARE PRETTY SIMILAR WITH THE OVERALL PATTERN. BERMUDA HIGH BUILDS IN OVER MUCH OF SOUTHERN OHIO WITH A 700 MB CAP OF 9 TO 10 DEGREES THROUGH MUCH OF THE FORECAST PERIOD. THIS WILL SUPPRESS CONVECTION OVER MUCH OF FORECAST AREA...ESPECIALLY SOUTHERN 2/3. THE MAIN ACTIVITY WILL REMAIN ALONG A NEARLY STATIONARY BOUNDARY IN SOUTHERN WI/MI AND NORTHERN IL/IN/OH. THE NORTHERN JET STREAM WILL PROVIDE THE UPPER LEVEL SUPPORT. IN FACT ALL THREE MODELS SHOW THE WHOLE BOUNDARY LIGHTING UP OVERNIGHT TONIGHT. THE BERMUDA HIGH BEGINS TO SLIDE SOUTHWARD ON WEDNESDAY AS STATIONARY BOUNDARY DRIFTS SOUTH INTO NORTHERN AND CENTRAL IL/IN/OH ALONG WITH ASSOCIATED UPPER LEVEL SUPPORT. FWC GUIDANCE HAS PRETTY GOOD HANDLE ON POPS AND TEMPS THROUGH PERIOD. THINK SUMMER TIME POP (30%) NORTH OF DAY AND CMH WOULD BE REASONABLE FOR TODAY AND ISOLATED OR NO MENTION REST OF CWA. DAY 094/072 090/072 085 114 CMH 094/073 091/071 084 214 CVG 095/073 091/071 084 114 PHM 095/071 092/072 087 114 TIPTON
The office that day
Everything else NWS Cleveland, OH issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 21, 8:33 PM EDT | Severe Thunderstorm Warning | CLE | Crawford | 62 min |
| Jul 21, 9:34 PM EDT | Severe Thunderstorm Warning | CLE | Crawford, Erie | 46 min |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 1998Every severe thunderstorm 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.