Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 9, NWS State College, PA
NWS State College, PA issued this severe thunderstorm warning at Jan 23, 1999, 6:34 PM EST for Huntingdon County, Pennsylvania. It was in force for 46 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Jan 23, 1999, 6:34 PM EST (23:34 UTC)
- Expired
- Jan 23, 1999, 7:20 PM EST
- In force
- 46 min
- Issued by
- NWS State College, PA
- Area
- Whole counties
County Huntingdon County, PA
The radar
The State College radar (KCCX), 56 km from the middle of the area, began a volume at 23:33 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.
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 11.6 hours before the alert went out and 171 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
- 409 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 158 m²/s²
- 0-3 km storm-relative helicity
- 135 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
999 WUUS01 KCTP 232335 RRA SVRCTP PAC061-240020- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE STATE COLLEGE PA 634 PM EST SAT JAN 23 1999 THE NATIONAL WEATHER SERVICE IN STATE COLLEGE HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... HUNTINGDON COUNTY IN SOUTH CENTRAL PENNSYLVANIA. * UNTIL 720 PM EST. * AT 633 PM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS FROM FROM WARRIORS MARK SOUTH TO 5 MILES WEST OF WARFORDBURG...MOVING EAST AT 30 MPH. * THE LINE OF SEVERE THUNDERSTORMS WILL BE NEAR... HUNTINGDON AT 645 PM. NEEDMORE AT 645 PM. MOUNT UNION AT 700 PM. MCCONNELLSBURG AT 700 PM. THIS IS A DANGEROUS LINE OF STORMS STAY INDOORS AWAY FROM WINDOWS. .END/ONDREJIK/NICOSIA
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 State College, PA wrote its last area forecast discussion before this severe thunderstorm warning went out at Jan 23, 2:30 PM EST, 4 hours 4 minutes earlier.
Area forecast discussion, Jan 23, 2:30 PM EST, 4 hours 4 minutes before
CENTRAL PENNSYLVANIA FORECAST DISCUSSION NATIONAL WEATHER SERVICE STATE COLLEGE PA 230 PM EST SAT JAN 23 1999 ...QPS...KEPTED FAIRLY CLOSE TO WHAT WE HAD EARLIER...USE 1238 PM VERSION...NOT 1228 PM VERSION...AS 1228 PM WAS SENT BY MISTAKE... ...WORK ZONES BY 3 PM... ...ZONES BY 345 PM... ...CHANGES... WILL KEEP FCST CLOSE TO WHAT WE HAVE OUT NOW. FOR MONDAY INTO THU...MAINLY DRY WX...CHC OF A SHOWER/SNOW SHOWER HERE AND THERE. ...DISC... WARM AIR JUST ENTERING OUR WESTERN AND SOUTHERN MOST PART OF OUR CWA. BAND OF SHOWERS OVER EASTERN OHIO...LIKELY TO HOLD TOGETHER ...AS W PA IN WARM SECTOR. TROPICAL AIR TRYING TO MOVE INTO EXTREME S PORTION OF LOWER SUSQ VLY. FEED OF MOISTURE NOW IN PLACE FROM THE SE ATLANTIC. EXPECT THAT HEAVIEST RAIN WILL BE OVER EXTREME NW AREA...GIVEN BETTER DYNAMICS...AND ACROSS SE PA...GIVEN FEED OFF SE ATLANTIC. MOST OF THE RAIN WILL BE BETWEEN 00Z AND 12Z. FOR SEVERE WX...WE ARE NOT OUTLOOK...NOR DO WE GET INTO THE BETTER DYNAMICS...AS SYSTEM SHEARS OUT. AN ISOLATED STORM COULD OCCUR EARLY ON THIS EVENING...BUT SHOULD NOT DO MUCH. FOR WIND...ISOLATED GUSTS LIKELY EARLY THIS EVENING ACROSS W SECTION...WILL KEEP WINDS UP IN ZONES. SHOULD BE UNDER ADVISORY LEVELS. FOR RAIN...WILL KEEP FLOOD WATCH UP...QPS LIKELY TO RANGE FROM 1.0 TO 1.5. LEVELS WILL COME CLOSE...GIVEN RAIN AND SNOW MELT. GUSTY WINDS AND HIGH DEWPOINTS WILL EAT AWAY AT A LOT OF SNOW. WILL HANDLE FOG AS PATCHY...LOOKS LIKE IT IS ON ITS WAY OUT. .CTP...FLASH FLOOD WATCH ENTIRE FA FOR TONIGHT AND SUNDAY. MARTIN
The office that day
Everything else NWS State College, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 23, 5:25 PM EST | Flash Flood Warning | CTP | Bedford, Blair, Cambria, Clearfield | 6 hr |
| Jan 23, 5:25 PM EST | Flash Flood Warning | CTP | Somerset | 6 hr |
| Jan 23, 5:35 PM EST | Severe Thunderstorm Warning | CTP | Bedford | 50 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.