Alert archive / Missouri / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 247, NWS Paducah, KY

June 15, 2011Ripley County, Missouri

NWS Paducah, KY issued this severe thunderstorm warning at Jun 15, 2011, 3:59 AM CDT for Ripley County, Missouri. It was in force for 21 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: Jun 15, 2011, 3:59 AM CDT (08:59 UTC)
Expired: Jun 15, 2011, 4:20 AM CDT
In force: 21 min
Issued by: NWS Paducah, KY
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Ripley County, MO

The radar

The Memphis radar (KNQA), 171 km from the middle of the area, began a volume at 09:02 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jun 15, 1:09 AM CDT	Severe Thunderstorm Watch	SPC	4 hr

The nearest sounding before it

Little Rock, AR (KLZK), launched 00:00Z, 9.0 hours before the alert went out and 219 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: 1727 J/kg
Mixed-layer CIN: -213 J/kg
Mixed-layer LCL: 1995 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 94 m²/s²
0-3 km storm-relative helicity: 269 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.7

Open this sounding in Storm Lab

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 Paducah, KY wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 15, 3:45 AM CDT, 14 minutes earlier.

Area forecast discussion, Jun 15, 3:45 AM CDT, 14 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PADUCAH KY
345 AM CDT WED JUN 15 2011

.DISCUSSION...
SFC ANALYSIS SHOWED A WARM FRONT ACROSS PARTS OF SERN MO THIS MRNG...
AND SHWRS AND TSTMS TO THE WEST OF THE PAH FCST AREA ASSOCIATED
WITH A LOW LEVEL JET AHEAD OF A COLD FRONT IN WRN MO. A MID LEVEL
SHRTWV TROF AND SFC TROF WILL PROCEED THROUGH THE REGION TODAY.
THIS SHOULD RESULT IN SCATTERED TO NUMEROUS SHWS/TSTMS...WITH
HIGHEST POPS IN THE EAST ONCE AGAIN. IN THE HEATING OF THE
DAY...THE ATMOSPHERE IS EXPECTED TO BECOME QUITE UNSTABLE...AND
WIND FIELDS ALOFT SHOULD SUPPORT AT LEAST ISOLATED SUPERCELL
DEVELOPMENT OVER WRN KY/SWRN IND/EXTREME SERN IL INTO POSSIBLY THE
EARLY EVE. THERE IS A SLIGHT RISK OF SEVERE WEATHER IN THIS AREA.

THU/THU NIGHT SHOULD BE DRY UNDER HIGH SFC PRESSURE AND NWRLY FLOW
ALOFT...HOWEVER RETURN FLOW ON THE BACK SIDE OF THE HIGH WILL TEND
TO INCREASE LOW LEVEL MOISTURE BY FRI /WITH SFC DEWPOINTS AROUND
70/. MOST MODELS SUGGEST A PERTURBATION ON THE PERIPHERY OF THE
RIDGE OVER THE SRN PLAINS SHOULD PROVIDE ENOUGH LIFT FOR SCATTERED
SHWS/TSTMS FOR MAINLY THE NERN HALF OF THE AREA INTO THE WEEKEND...
CONTRACTING AT NIGHT AND RE-EXPANDING TOWARD THE SW DURING THE
DAY. BY SUNDAY...THE HEATING WILL BE WELL UNDERWAY...WITH
DECREASING POPS AS THE MID/UPPER LEVEL RIDGE EXPANDS NEWD.
CURRENTLY THE FCST IS DRY THROUGH DAY 7...HOWEVER SOME MODELS SUCH
AS THE FASTER GFS SUGGEST A TROF/FRONT MAY PROVIDE ANOTHER
INTERVAL OF PCPN MID WEEK.

&&

.AVIATION...
RAPID THUNDERSTORM DEVELOPMENT IS LIKELY IN THE EAST IN THE VICINITY
OF KEVV AND KOWB BY 10Z. MVFR/IFR CONDITIONS CERTAINLY POSSIBLE WITH
THUNDER. FARTHER EAST...NOT AS CONFIDENT IN CONVECTIVE FORECAST...
BUT WHATEVER IS GOING TO HAPPEN IS LIKELY TO BE DONE BY 14Z OR SO.
CANNOT RULE OUT A STORM OR TWO IN THE EAST INTO THE EARLY
AFTERNOON...BUT A CB SHOULD HANDLE THAT POSSIBILITY. VFR CEILINGS
SHOULD SCATTER OR CLEAR THROUGHOUT THE AREA BY SUNSET.

INITIAL SOUTHEAST WINDS WILL VEER BRIEFLY TO SOUTH SOUTHWEST BEHIND
THE WARM FRONT LATE THIS MORNING...AND THEN TO WEST SOUTHWEST OR
WEST BEHIND THE COLD FRONT THIS AFTERNOON. THEY SHOULD GO CALM
TONIGHT...WHICH UNDER CLEAR SKIES...MAY LEAD TO FOG DEVELOPMENT IN
AREAS THAT RECEIVE SIGNIFICANT RAIN THIS MORNING.

&&

.PAH WATCHES/WARNINGS/ADVISORIES...
KY...NONE.
MO...NONE.
IL...NONE.
IN...NONE.
&&

PUBLIC...DB
AVAITION...DRS

Hazardous weather outlook, Jun 15, 1:29 AM CDT, 2 hours 30 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
Jun 15, 5:02 PM CDT	Severe Thunderstorm Warning	PAH	Hopkins	18 min
Jun 15, 5:56 PM CDT	Severe Thunderstorm Warning	PAH	Muhlenberg	19 min
Jun 15, 5:59 PM CDT	Severe Thunderstorm Warning	PAH	Christian, Trigg	29 min
Jun 15, 2:15 PM CDT	Severe Thunderstorm Warning	PAH	Union	30 min
Jun 15, 2:36 PM CDT	Severe Thunderstorm Warning	PAH	Alexander, Pulaski, Union	24 min
Jun 15, 2:44 PM CDT	Severe Thunderstorm Warning	PAH	Johnson	31 min
Jun 15, 3:12 PM CDT	Severe Thunderstorm Warning	PAH	Johnson, Pope	33 min
Jun 15, 3:43 PM CDT	Severe Thunderstorm Warning	PAH	Hamilton, Wayne	32 min
Jun 15, 4:13 PM CDT	Severe Thunderstorm Warning	PAH	Hamilton, Wayne, White	23 min

Nearby

Severe Thunderstorm Warnings in Missouri, 2011 Every severe thunderstorm warning in 2011

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.