Alert archive / Kentucky / Flash Flood Watches in 2015

Flash Flood Watch 4, NWS Paducah, KY

July 1, 201517 counties in Kentucky; 9 counties in Illinois; 11 counties in Missouri

NWS Paducah, KY issued this flash flood watch at Jul 1, 2015, 12:35 AM CDT for 17 counties in Kentucky; 9 counties in Illinois; 11 counties in Missouri. It took effect at Jul 1, 2015, 7:00 PM CDT. It was in force for 12 hr.

The area

The counties it named.

The facts

Issued: Jul 1, 2015, 12:35 AM CDT (05:35 UTC)
In effect from: Jul 1, 2015, 7:00 PM CDT
Expired: Jul 2, 2015, 6:51 AM CDT
In force: 12 hr
Issued by: NWS Paducah, KY
Flood severity: None

All 37 counties

Alexander County, IL, Hardin County, IL, Jackson County, IL, Johnson County, IL, Massac County, IL, Pope County, IL, Pulaski County, IL, Union County, IL, Williamson County, IL, Ballard County, KY, Caldwell County, KY, Calloway County, KY, Carlisle County, KY, Christian County, KY, Crittenden County, KY, Fulton County, KY, Graves County, KY, Hickman County, KY, Hopkins County, KY, Livingston County, KY, Lyon County, KY, Marshall County, KY, McCracken County, KY, Muhlenberg County, KY, Todd County, KY, Trigg County, KY, Bollinger County, MO, Butler County, MO, Cape Girardeau County, MO, Carter County, MO, Mississippi County, MO, New Madrid County, MO, Perry County, MO, Ripley County, MO, Scott County, MO, Stoddard County, MO, Wayne County, MO

The radar

The Paducah radar (KPAH), 15 km from the middle of the area, began a volume at 05:34 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

Lincoln, IL (KILX), launched 00:00Z, 5.6 hours before the alert went out and 341 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: 81 J/kg
Mixed-layer CIN: -26 J/kg
Mixed-layer LCL: 1498 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 11 m²/s²
0-3 km storm-relative helicity: 95 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flash flood watch went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Paducah, KY wrote its last area forecast discussion before this flash flood watch went out at Jul 1, 12:17 AM CDT, 18 minutes earlier.

Area forecast discussion, Jul 1, 12:17 AM CDT, 18 minutes before

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Hazardous weather outlook, Jun 30, 1:59 PM CDT, 10 hours 36 minutes before

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The office that day

Everything else NWS Paducah, KY issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 1, 12:50 PM CDT	River Flood Warning	PAH	McCracken	25 days

Nearby

Flash Flood Watches in Kentucky, 2015 Flash Flood Watches in Missouri, 2015 Flash Flood Watches in Illinois, 2015 Every flash flood watch in 2015

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.