Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 169, NWS Cleveland, OH
NWS Cleveland, OH issued this severe thunderstorm warning at Sep 29, 1999, 4:49 PM EDT for Crawford County, Erie County, Pennsylvania. It was in force for 61 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
- Sep 29, 1999, 4:49 PM EDT (20:49 UTC)
- Expired
- Sep 29, 1999, 5:50 PM EDT
- In force
- 61 min
- Issued by
- NWS Cleveland, OH
- Area
- Whole counties
Counties Crawford County, PA, Erie County, PA
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Sep 29, 5:15 PM EDT | Thunderstorm Wind | Countywide, PA | Thunderstorm winds estimated at 65 to 75 mph downed trees and large limbs throughout the county. At least 20 trees were downed in Corry. A house in Corry was slightly damaged by a tree and two cars were crushed by fallen trees. |
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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Sep 29, 3:45 PM EDT | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 8.8 hours before the alert went out and 162 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
- 563 J/kg
- Mixed-layer CIN
- -65 J/kg
- Mixed-layer LCL
- 885 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 120 m²/s²
- 0-3 km storm-relative helicity
- 153 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
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 Sep 29, 3:55 PM EDT, 54 minutes earlier.
Area forecast discussion, Sep 29, 3:55 PM EDT, 54 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE CLEVELAND OH 355 PM EDT WED SEP 29 1999 LOTS OF SVR WX THIS AFTN AND RAN BEHIND THE CURVE. GENERAL FCST TRENDS FM PREVIOUS PKG FOLLOWED WITH CDFNT SLOLY TREKING EAST OF CWA BY EARLY THU. PARTIAL CLRG SLOY WRN OH LT TNGT AND REST OF THE AREA INTO THU. TEMPS CLOSE TO MOS. DEB .CLE...NONE
The office that day
Everything else NWS Cleveland, OH issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 29, 1:14 PM EDT | Severe Thunderstorm Warning | CLE | Knox | 46 min |
| Sep 29, 1:20 PM EDT | Severe Thunderstorm Warning | CLE | Holmes | 65 min |
| Sep 29, 2:37 PM EDT | Severe Thunderstorm Warning | CLE | Geauga, Lake | 63 min |
| Sep 29, 3:03 PM EDT | Severe Thunderstorm Warning | CLE | Stark, Summit | 62 min |
| Sep 29, 3:52 PM EDT | Severe Thunderstorm Warning | CLE | Portage | 63 min |
| Sep 29, 4:18 PM EDT | Severe Thunderstorm Warning | CLE | Ashtabula | 62 min |
| Sep 29, 4:19 PM EDT | Severe Thunderstorm Warning | CLE | Trumbull | 41 min |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 1999Every severe thunderstorm warning in 1999
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.