Alert archive / Indiana / Winter Storm Watches in 2012
Winter Storm Watch 3, NWS Louisville, KY
NWS Louisville, KY issued this winter storm watch at Dec 25, 2012, 3:41 AM CST for Hancock County, Trimble County, Kentucky; 6 counties in Indiana. It took effect at Dec 25, 2012, 9:00 PM CST. It was in force for .
The area
The counties it named.
The facts
- Issued
- Dec 25, 2012, 3:41 AM CST (09:41 UTC)
- In effect from
- Dec 25, 2012, 9:00 PM CST
- Expired
- Dec 25, 2012, 3:03 PM CST
- In force
- Issued by
- NWS Louisville, KY
Counties Clark County, IN, Crawford County, IN, Floyd County, IN, Harrison County, IN, Jefferson County, IN, Perry County, IN, Hancock County, KY, Trimble County, KY
The radar
The Louisville radar (KLVX), 40 km from the middle of the area, began a volume at 09:46 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
Cncnati-Daytn, OH (KILN), launched 00:00Z, 9.7 hours before the alert went out and 230 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
- 446 m above ground
- 0-6 km bulk shear
- 62 kt
- 0-1 km storm-relative helicity
- 61 m²/s²
- 0-3 km storm-relative helicity
- 84 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this winter storm watch went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Louisville, KY wrote its last area forecast discussion before this winter storm watch went out at Dec 25, 2:50 AM CST, 51 minutes earlier.
Area forecast discussion, Dec 25, 2:50 AM CST, 51 minutes before
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</html>The office that day
Everything else NWS Louisville, KY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 25, 2:05 PM CST | Winter Weather Advisory | LMK | Adair, Allen, Anderson, Barren, Bourbon, Boyle and 43 more | 30 hr |
| Dec 25, 3:41 AM CST | Winter Storm Warning | LMK | Dubois, Orange, Scott, Washington | 11 hr |
| Dec 25, 2:05 PM CST | Blizzard Warning | LMK | Dubois, Jefferson, Orange, Scott, Washington | 19 hr |
Nearby
Winter Storm Watches in Indiana, 2012Winter Storm Watches in Kentucky, 2012Every winter storm watch in 2012
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.