Alert archive / Kentucky / Special Weather Statements in 2017

Special Weather Statement, NWS Jackson, KY

May 11, 2017Rowan County, Kentucky

NWS Jackson, KY issued this special weather statement at May 11, 2017, 3:25 PM EDT for Rowan County, Kentucky. It was in force for 35 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
May 11, 2017, 3:25 PM EDT (19:25 UTC)
Expired
May 11, 2017, 4:00 PM EDT
In force
35 min
Issued by
NWS Jackson, KY

County Rowan County, KY

The radar

The Jackson,KY radar (KJKL), 56 km from the middle of the area, began a volume at 19:24 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

Roanoke, VA (KRNK), launched 12:00Z, 7.4 hours before the alert went out and 355 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-pSkew-T log-p diagram, Roanoke, VA at 12:00Z on 2017-05-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Roanoke, VA at 12:00Z on 2017-05-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 156 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1015 m above ground
0-6 km bulk shear
49 kt
0-1 km storm-relative helicity
156 m²/s²
0-3 km storm-relative helicity
176 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

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

NWS Jackson, KY wrote its last area forecast discussion before this special weather statement went out at May 11, 2:33 PM EDT, 52 minutes earlier.

Area forecast discussion, May 11, 2:33 PM EDT, 52 minutes before
AREA FORECAST DISCUSSION
National Weather Service Jackson KY
233 PM EDT Thu May 11 2017

.SHORT TERM...(This evening through Friday night)
Issued at 233 PM EDT THU MAY 11 2017

Current conditions across the area feature the main threat across
eastern Kentucky being a moist and unstable air mass setting up
over Kentucky ahead of a slowly inching south cold front. Surface
instability has been sufficient enough to get some showers and a
few storms to develop and slide east southeast. Later this
afternoon into the evening, an MCV present over IN will shift east
providing a bit more upper level support but the overall limiting
factor despite decent shear, instability, and weak forcing will
be the shallow lapse rates with this set up. Thus heading into
this evening, the main area of concern will slide south and
southeast KY being the area to watch since some decent sunshine
occurred today as well. Will expect to see a few strong and
possibly a severe storm or two.

Heading into later tonight, the concern shifts to more of a flood
concern. Any training activity this evening will leave a saturated
boundary layer with additional rain moving in on Friday as the low
out west lifts northeast bringing through a second cold front and
increased shower and thunderstorm activity. The persistent ascent
and PWATs in the 1.20 to 1.40 range will continue to present a
flood threat. Will continue to mention this in the HWO through the
day on Friday. The convection finally weakens Friday night as the
front shifts off to the east.

.LONG TERM...(Saturday through Thursday)
Issued at 212 PM EDT THU MAY 11 2017

A few rain showers could hang on into southeast Kentucky Saturday
morning. Otherwise, dry weather should return by midday and last
through the remainder of the weekend as mid level ridging spreads
over the area. A back door cold front may make a run at the area
on Sunday, but not very good model agreement on whether showers
will make it this far west, so kept the weekend dry. Ridging will
strengthen into early next week with milder weather returning to
the area as highs climb back into the 80s. The ridge may break
down by Thursday allowing for our next chance for a few showers or
storms. All in all, a pleasant stretch of spring weather is ahead.

&&

.AVIATION...(For the 18Z TAFS through 18Z Friday afternoon)
ISSUED AT 136 PM EDT THU MAY 11 2017

A low level very unstable air mass and moist as well has lead to
some shower and thunderstorm development early this afternoon.
Thus a few TAF sites have some MVFR cigs with the cumulus
development. This activity will lift a bit as a front slides
southeast bringing a few rounds of showers and thunderstorms. Will
expect some IFR cigs tonight at each of the sites with this
activity and continuing through tomorrow morning. Expect them to
lift a bit heading into the late morning tomorrow. Winds will be
variable at most locations until increasing from the west and
northwest as the front slides south.

&&

.JKL WATCHES/WARNINGS/ADVISORIES...
NONE.
&&

SHORT TERM...SHALLENBERGER
LONG TERM...KAS
AVIATION...SHALLENBERGER
Hazardous weather outlook, May 11, 5:24 AM EDT, 10 hours 1 minute before
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In the hours before

Special weather statement, May 11, 3:25 PM EDT, 0 minutes before
Special Weather Statement
National Weather Service JACKSON KY
325 PM EDT THU MAY 11 2017

KYZ051-052-104-106-112000-
Rowan-Elliott-Morgan-Bath-
325 PM EDT THU MAY 11 2017

...A STRONG THUNDERSTORM WILL AFFECT NORTHWESTERN MORGAN...EAST
CENTRAL BATH...SOUTHERN ROWAN AND SOUTHWESTERN ELLIOTT COUNTIES...

At 325 PM EDT, a strong thunderstorm was located over Midland, or 9
miles southwest of Morehead, moving east at 35 mph.

Winds in excess of 30 mph and pea size hail are possible with this
storm.

Locations impacted include...
Salt Lick, Blairs Mills, Yale, Paragon, Lick Fork, Bangor, Midland,
Leisure, Cogswell, Craney, Zilpo, Wrigley, Lytten, Pelfrey and Little
Sandy.

Torrential rainfall is also occurring with this storm, and may cause
localized flooding. Do not drive your vehicle through flooded
roadways.

LAT...LON 3811 8317 3800 8320 3808 8366 3815 8365
TIME...MOT...LOC 1925Z 275DEG 31KT 3810 8357

GEOGERIAN

The office that day

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

IssuedProductOfficeCountiesLasted
May 11, 5:01 AM EDTSpecial Weather StatementJKLEstill, Lee, Magoffin, Wolfe29 min
May 11, 2:52 PM EDTAreal Flood AdvisoryJKLBath, Fleming, Rowan3 hr
May 11, 3:55 PM EDTSpecial Weather StatementJKLMorgan35 min
May 11, 4:19 PM EDTSevere Thunderstorm WarningJKLFloyd, Johnson, Magoffin, Morgan41 min
May 11, 4:33 PM EDTSpecial Weather StatementJKLMartin42 min
May 11, 4:40 PM EDTSpecial Weather StatementJKLEstill, Powell50 min
May 11, 4:56 PM EDTSpecial Weather StatementJKLFloyd, Pike49 min
May 11, 5:02 PM EDTSpecial Weather StatementJKLRockcastle28 min
May 11, 5:08 PM EDTAreal Flood AdvisoryJKLBreathitt, Estill, Lee, Magoffin, Powell, Wolfe3 hr
May 11, 5:17 PM EDTSevere Thunderstorm WarningJKLPike26 min
May 11, 5:30 PM EDTSpecial Weather StatementJKLLaurel, Rockcastle45 min
May 11, 5:45 PM EDTSpecial Weather StatementJKLPulaski45 min
May 11, 6:14 PM EDTSpecial Weather StatementJKLClay46 min
May 11, 6:34 PM EDTSpecial Weather StatementJKLLaurel, Pulaski26 min
May 11, 7:00 PM EDTSpecial Weather StatementJKLBell, Harlan, Knox, McCreary, Wayne, Whitley60 min

Nearby

Special Weather Statements in Kentucky, 2017Every special weather statement in 2017

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.