Alert archive / Pennsylvania / Flash Flood Warnings in 1999
Flash Flood Warning 21, NWS State College, PA
NWS State College, PA issued this flash flood warning at Jan 24, 1999, 8:00 AM EST for Union County, Pennsylvania. It was in force for 4 hr. 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 24, 1999, 8:00 AM EST (13:00 UTC)
- Expired
- Jan 24, 1999, 12:00 PM EST
- In force
- 4 hr
- Issued by
- NWS State College, PA
- Area
- Whole counties
County Union County, PA
The radar
The State College radar (KCCX), 79 km from the middle of the area, began a volume at 13:02 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
Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 1.0 hours before the alert went out and 257 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
- 1 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 490 m above ground
- 0-6 km bulk shear
- 76 kt
- 0-1 km storm-relative helicity
- -144 m²/s²
- 0-3 km storm-relative helicity
- -121 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KCTP 241301 FFWCTP PAC037-097-119-241700- BULLETIN - EAS ACTIVATION REQUESTED FLOOD WARNING NATIONAL WEATHER SERVICE STATE COLLEGE PA 800 AM EST SUN JAN 24 1999 THE NATIONAL WEATHER SERVICE HAS ISSUED A * FLOOD WARNING FOR... UNION COUNTY IN CENTRAL PENNSYLVANIA. NORTHUMBERLAND COUNTY IN CENTRAL PENNSYLVANIA. COLUMBIA COUNTY IN CENTRAL PENNSYLVANIA. * UNTIL 1200 PM EST. * AT 8 AM...RAIN WAS ENDING ACROSS CENTRAL AND EASTERN PENNSYLVANIA. * RUNOFF FROM EARLIER RAIN AND SNOWMELT HAS CAUSED FLOODING OF SOME STREAMS AND POOR DRAINAGE AREAS. IN NORTHUMBERLAND COUNTY... HAMILTON AND REGAN STREET UNDERPASSES ARE CLOSED IN THE TOWN OF SUNBURY. ELSEWHERE IN THE WARNING AREA...NUMEROUS SECONDARY ROADS HAVE BEEN FLOODED. USE CAUTION WHILE TRAVELING TODAY...AS SOME ROADS AND LOW-LYING AREAS MAY BE COVERED BY FLOODWATERS. .END/KF &
The office that day
Everything else NWS State College, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 23, 7:32 PM EST | Flash Flood Warning | CTP | Huntingdon | 6 hr |
| Jan 23, 10:40 PM EST | Flash Flood Warning | CTP | Centre | 6 hr |
| Jan 23, 11:01 PM EST | Flash Flood Warning | CTP | Juniata, Mifflin | 6 hr |
| Jan 24, 1:58 AM EST | Flash Flood Warning | CTP | Huntingdon | 3 hr |
| Jan 24, 3:58 AM EST | Flash Flood Warning | CTP | Northumberland, Union | 4 hr |
| Jan 24, 4:39 AM EST | Flash Flood Warning | CTP | Centre, Huntingdon, Juniata, Mifflin | 3 hr |
| Jan 24, 7:51 AM EST | Flash Flood Warning | CTP | Centre | 4 hr |
| Jan 24, 7:51 AM EST | Flash Flood Warning | CTP | Juniata | 4 hr |
| Jan 24, 8:00 AM EST | Flash Flood Warning | CTP | Columbia, Northumberland | 4 hr |
| Jan 24, 9:23 AM EST | Flash Flood Warning | CTP | Huntingdon | 3 hr |
| Jan 24, 11:59 AM EST | Flash Flood Warning | CTP | Huntingdon | 4 hr |
| Jan 24, 11:59 AM EST | Flash Flood Warning | CTP | Columbia | 4 hr |
| Jan 24, 11:59 AM EST | Flash Flood Warning | CTP | Union | 4 hr |
| Jan 24, 1:16 PM EST | Flash Flood Warning | CTP | Lycoming | 3 hr |
Nearby
Flash Flood Warnings in Pennsylvania, 1999Every flash flood 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.