Alert archive / Illinois / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 72, NWS Paducah, KY

May 15, 2015Alexander County, Illinois; Scott County, Missouri

NWS Paducah, KY issued this severe thunderstorm warning at May 15, 2015, 2:59 PM CDT for Alexander County, Illinois; Scott County, Missouri. It was in force for 18 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: May 15, 2015, 2:59 PM CDT (19:59 UTC)
Expired: May 15, 2015, 3:17 PM CDT
In force: 18 min
Issued by: NWS Paducah, KY
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Alexander County, IL, Scott County, MO

The radar

The Paducah radar (KPAH), 61 km from the middle of the area, began a volume at 20:03 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

Little Rock, AR (KBYH), launched 12:00Z, 8.0 hours before the alert went out and 259 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: 1158 J/kg
Mixed-layer CIN: -49 J/kg
Mixed-layer LCL: 898 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 90 m²/s²
0-3 km storm-relative helicity: 67 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 May 15, 2:40 PM CDT, 19 minutes earlier.

Area forecast discussion, May 15, 2:40 PM CDT, 19 minutes before

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Hazardous weather outlook, May 15, 3:14 AM CDT, 11 hours 45 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE PADUCAH KY
314 AM CDT FRI MAY 15 2015

ILZ075>078-080>094-INZ081-082-085>088-KYZ001>022-MOZ076-086-087-
100-107>112-114-161000-
JEFFERSON-WAYNE IL-EDWARDS-WABASH-PERRY IL-FRANKLIN-HAMILTON-
WHITE-JACKSON-WILLIAMSON-SALINE-GALLATIN-UNION IL-JOHNSON-POPE-
HARDIN-ALEXANDER-PULASKI-MASSAC-GIBSON-PIKE-POSEY-VANDERBURGH-
WARRICK-SPENCER-FULTON-HICKMAN-CARLISLE-BALLARD-MCCRACKEN-GRAVES-
LIVINGSTON-MARSHALL-CALLOWAY-CRITTENDEN-LYON-TRIGG-CALDWELL-
UNION KY-WEBSTER-HOPKINS-CHRISTIAN-HENDERSON-DAVIESS-MCLEAN-
MUHLENBERG-TODD-PERRY MO-BOLLINGER-CAPE GIRARDEAU-WAYNE MO-CARTER-
RIPLEY-BUTLER-STODDARD-SCOTT-MISSISSIPPI-NEW MADRID-
314 AM CDT FRI MAY 15 2015

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHERN
ILLINOIS...SOUTHWEST INDIANA...WESTERN KENTUCKY AND SOUTHEAST
MISSOURI.

.DAY ONE...TODAY AND TONIGHT

A CHANCE OF STORMS IS FORECAST LATER TODAY AND CONTINUES
TONIGHT...BUT NO SEVERE WEATHER IS EXPECTED. HEAVY RAIN WILL BE
THE PRIMARY HAZARD WITH ANY STRONGER STORMS.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

STORMS ARE FORECAST EACH DAY THROUGH MONDAY...BUT SEVERE WEATHER
IS NOT EXPECTED. HEAVY RAIN WILL BE THE PRIMARY HAZARD WITH ANY
STRONGER STORMS.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT ANTICIPATED AT THIS TIME.

In the hours before

Special weather statement, May 15, 1:37 PM CDT, 1 hour 22 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PADUCAH KY
137 PM CDT FRI MAY 15 2015

MOZ076-086-087-151900-
PERRY MO-BOLLINGER MO-CAPE GIRARDEAU MO-
137 PM CDT FRI MAY 15 2015

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN CAPE GIRARDEAU...
SOUTHWESTERN PERRY AND NORTHEASTERN BOLLINGER COUNTIES UNTIL 200 PM
CDT...

AT 137 PM CDT...DOPPLER RADAR WAS TRACKING A LINE OF STRONG
THUNDERSTORMS ALONG A LINE EXTENDING FROM NEAR ALLIANCE TO NEAR
PATTON TO NEAR GLEN ALLEN...AND MOVING NORTHEAST AT 25 MPH.

HALF INCH HAIL AND WINDS IN EXCESS OF 45 MPH WILL BE POSSIBLE WITH
THESE STORMS.

LOCATIONS IMPACTED INCLUDE...
PERRYVILLE...DAISY...PATTON...BIEHLE...ALLIANCE...SEDGEWICKVILLE AND
SILVER LAKE.

LAT...LON 3777 8989 3759 8974 3745 8974 3736 9007
      3749 9007 3761 9013
TIME...MOT...LOC 1837Z 249DEG 23KT 3760 9009 3750 9003 3737 9004

Local storm report, May 15, 1:49 PM CDT, 1 hour 10 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
May 15, 1:37 PM CDT	Special Weather Statement	PAH	Perry	23 min

Nearby

Severe Thunderstorm Warnings in Illinois, 2015 Severe Thunderstorm Warnings in Missouri, 2015 Every severe thunderstorm warning 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.