Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 21, NWS State College, PA

May 10, 2007Cumberland County, Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at May 10, 2007, 5:55 PM EDT for Cumberland County, Pennsylvania. It was in force for 65 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: May 10, 2007, 5:55 PM EDT (21:55 UTC)
Expired: May 10, 2007, 7:00 PM EDT
In force: 65 min
Issued by: NWS State College, PA
Area: Counties, with a storm outline in the text

County Cumberland County, PA

The radar

The State College radar (KCCX), 109 km from the middle of the area, began a volume at 21:56 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
May 10, 6:10 PM EDT	HAIL 0.88	N Carlisle, PA

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
May 10, 12:17 PM EDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 9.9 hours before the alert went out and 120 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 442 J/kg
Mixed-layer CIN: -63 J/kg
Mixed-layer LCL: 465 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: 32 m²/s²
0-3 km storm-relative helicity: 19 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WUUS51 KCTP 102155
SVRCTP
PAC041-102300-
/O.NEW.KCTP.SV.W.0021.070510T2155Z-070510T2300Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE STATE COLLEGE PA
555 PM EDT THU MAY 10 2007

THE NATIONAL WEATHER SERVICE IN STATE COLLEGE PA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN CUMBERLAND COUNTY IN SOUTH CENTRAL PENNSYLVANIA...

* UNTIL 700 PM EDT

* AT 552 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING NICKEL SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR
  CARLISLE SPRINGS...OR NEAR CARLISLE...AND MOVING SOUTHEAST AT 10
  MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  CARLISLE SPRINGS AND CARLISLE AROUND 605 PM EDT...  

THIS WILL IMPACT THE FOLLOWING CENTRAL PENNSYLVANIA INTERSTATES...THE
PENNSYLVANIA TURNPIKE BETWEEN MILE MARKERS 217 AND 239...I-81 BETWEEN
MILE MARKERS 42 AND 58.

THIS WILL ALSO IMPACT THE FOLLOWING MAJOR ROADS...THE HARRISBURG
EXPRESSWAY...ROUTE 11...ROUTE 15.

SEVERE THUNDERSTORMS CONTAIN DAMAGING WINDS 58 MPH OR STRONGER...OR
HAIL THREE QUARTERS OF AN INCH OR LARGER. SEEK SHELTER INSIDE A
STURDY LOCATION NOW.

PLEASE REPORT HAIL...STRONG WINDS OR WIND DAMAGE TO THE NATIONAL
WEATHER SERVICE BY CALLING TOLL FREE...1 8 7 7 6 3 3 6 7 7 2.

LAT...LON 4016 7701 4007 7717 4025 7739 4028 7734
      4027 7730 4029 7723 4030 7707 4021 7692
      4018 7693 4017 7692

$$

FORECASTER:LA CORTE

The office that day

Everything else NWS State College, PA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 10, 12:55 PM EDT	Severe Thunderstorm Warning	CTP	Potter	65 min
May 10, 1:07 PM EDT	Severe Thunderstorm Warning	CTP	Lycoming	53 min
May 10, 1:18 PM EDT	Severe Thunderstorm Warning	CTP	Tioga	57 min
May 10, 1:37 PM EDT	Severe Thunderstorm Warning	CTP	Clinton	53 min
May 10, 2:12 PM EDT	Severe Thunderstorm Warning	CTP	Lycoming	93 min
May 10, 2:23 PM EDT	Severe Thunderstorm Warning	CTP	Mifflin	97 min
May 10, 3:02 PM EDT	Severe Thunderstorm Warning	CTP	Union	73 min
May 10, 3:08 PM EDT	Severe Thunderstorm Warning	CTP	Centre	37 min
May 10, 3:18 PM EDT	Severe Thunderstorm Warning	CTP	Juniata, Snyder	72 min
May 10, 4:56 PM EDT	Severe Thunderstorm Warning	CTP	Huntingdon	34 min
May 10, 5:08 PM EDT	Severe Thunderstorm Warning	CTP	Franklin	37 min
May 10, 5:38 PM EDT	Severe Thunderstorm Warning	CTP	Perry	37 min
May 10, 5:45 PM EDT	Severe Thunderstorm Warning	CTP	Franklin	60 min
May 10, 6:59 PM EDT	Flash Flood Warning	CTP	Cumberland	3 hr

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2007 Every severe thunderstorm warning in 2007

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.