Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 21, NWS Cleveland, OH
NWS Cleveland, OH issued this severe thunderstorm warning at Apr 27, 2011, 3:46 PM EDT for Crawford County, Pennsylvania. It was in force for 59 min. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Apr 27, 2011, 3:46 PM EDT (19:46 UTC)
- Expired
- Apr 27, 2011, 4:45 PM EDT
- In force
- 59 min
- Issued by
- NWS Cleveland, OH
- Area
- Storm-based polygon
County Crawford County, PA
The radar
The Pittsburgh radar (KPBZ), 118 km from the middle of the area, began a volume at 19:47 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 |
|---|---|---|---|
| Apr 27, 4:15 PM EDT | TSTM WND DMG | Meadville, PA | SEVERAL TREES AND WIRES DOWN |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Pittsburgh, PA (KPIT), launched 12:00Z, 7.8 hours before the alert went out and 131 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
- 393 J/kg
- Mixed-layer CIN
- -78 J/kg
- Mixed-layer LCL
- 1147 m above ground
- 0-6 km bulk shear
- 57 kt
- 0-1 km storm-relative helicity
- 110 m²/s²
- 0-3 km storm-relative helicity
- 250 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.8
The text
As transmitted, in the capitals the NWS used until 2016.
109
WUUS51 KCLE 271946
SVRCLE
PAC039-272045-
/O.NEW.KCLE.SV.W.0021.110427T1946Z-110427T2045Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE CLEVELAND OH
346 PM EDT WED APR 27 2011
THE NATIONAL WEATHER SERVICE IN CLEVELAND HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
CRAWFORD COUNTY IN NORTHWEST PENNSYLVANIA
* UNTIL 445 PM EDT
* AT 344 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
OF 60 MPH. THIS STORM WAS LOCATED 17 MILES SOUTH OF LINESVILLE...
AND MOVING NORTHEAST AT 45 MPH.
* LOCATIONS IMPACTED INCLUDE...
MEADVILLE...
LINESVILLE...
TITUSVILLE...
CAMBRIDGE SPRINGS...
SPARTANSBURG...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THIS IS A DANGEROUS STORM. SEEK SHELTER INSIDE NOW AND STAY AWAY FROM
WINDOWS.
&&
PLEASE REPORT HAIL AND STRONG WINDS TO THE NATIONAL WEATHER SERVICE
BY CALLING TOLL FREE...877-633-6772...WHEN YOU CAN DO SO SAFELY.
LAT...LON 4161 7965 4162 7982 4160 7984 4158 7990
4151 8000 4149 7999 4148 8003 4148 8042
4149 8045 4148 8046 4148 8050 4184 8052
4185 7962 4162 7962
TIME...MOT...LOC 1947Z 203DEG 45KT 4146 8042
$$
LAPLANTE1 follow-up statement
915
WWUS51 KCLE 272047
SVSCLE
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CLEVELAND OH
447 PM EDT WED APR 27 2011
PAC039-272056-
/O.EXP.KCLE.SV.W.0021.000000T0000Z-110427T2045Z/
CRAWFORD PA-
447 PM EDT WED APR 27 2011
...THE SEVERE THUNDERSTORM WARNING FOR CRAWFORD COUNTY IN NORTHWEST
PENNSYLVANIA EXPIRED AT 445 PM EDT...
THE THUNDERSTORMS THAT PRODUCED GUSTY WINDS ACROSS THE COUNTY HAVE
MOVED NORTHEAST OF THE AREA INTO ERIE COUNTY.
LAT...LON 4161 7965 4162 7982 4160 7984 4158 7990
4151 8000 4149 7999 4148 8003 4148 8042
4149 8045 4148 8046 4148 8050 4184 8052
4185 7962 4162 7962
TIME...MOT...LOC 1946Z 203DEG 45KT 4145 8042
$$
LOMBARDYThe office that day
Everything else NWS Cleveland, OH issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 27, 4:09 PM EDT | Severe Thunderstorm Warning | CLE | Erie | 66 min |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 2011Every severe thunderstorm warning in 2011
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.