Alert archive / Illinois / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 212, NWS Paducah, KY

July 15, 2018Alexander County, Illinois; Scott County, Missouri

NWS Paducah, KY issued this severe thunderstorm warning at Jul 15, 2018, 4:52 PM CDT for Alexander County, Illinois; Scott County, Missouri. It was in force for 23 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
Jul 15, 2018, 4:52 PM CDT (21:52 UTC)
Expired
Jul 15, 2018, 5:15 PM CDT
In force
23 min
Issued by
NWS Paducah, KY
Area
Storm-based polygon
Hail
0.75 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 21:55 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, 9.9 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-pSkew-T log-p diagram, Little Rock, AR at 12:00Z on 2018-07-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 915 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, Little Rock, AR at 12:00Z on 2018-07-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -30 square meters per square second.1939Sfc1 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
915 J/kg
Mixed-layer CIN
-62 J/kg
Mixed-layer LCL
1432 m above ground
0-6 km bulk shear
3 kt
0-1 km storm-relative helicity
-30 m²/s²
0-3 km storm-relative helicity
-15 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 Jul 15, 1:33 PM CDT, 3 hours 19 minutes earlier.

Area forecast discussion, Jul 15, 1:33 PM CDT, 3 hours 19 minutes before
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Hazardous weather outlook, Jul 15, 5:35 AM CDT, 11 hours 17 minutes before
Hazardous Weather Outlook
National Weather Service Paducah KY
535 AM CDT Sun Jul 15 2018

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-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-
535 AM CDT Sun Jul 15 2018

This Hazardous Weather Outlook is for portions of southern
Illinois, southwest Indiana, western Kentucky, and southeast
Missouri.

.DAY ONE...Today and Tonight

Scattered thunderstorms are expected across the region today and
tonight. Torrential rainfall and deadly lightning will be the main
thunderstorm hazards.

In addition....heat index values will top out between 95 and 105
this afternoon.

.DAYS TWO THROUGH SEVEN...Monday through Saturday

Scattered thunderstorms are expected again on Monday. The chance
of thunderstorms returns Thursday west of the Mississippi River,
and then area-wide on Friday. While a few stronger storms with
damaging winds cannot be ruled out, the main concerns include
lightning and locally heavy rain.

Heat indices are forecast to top the century mark Monday
afternoon.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not anticipated.

In the hours before

Local storm report, Jul 15, 1:27 PM CDT, 3 hours 25 minutes before
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Special weather statement, Jul 15, 1:30 PM CDT, 3 hours 22 minutes before
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Local storm report, Jul 15, 1:33 PM CDT, 3 hours 19 minutes before
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Special weather statement, Jul 15, 2:12 PM CDT, 2 hours 40 minutes before
Special Weather Statement
National Weather Service Paducah KY
212 PM CDT SUN JUL 15 2018

MOZ076-152015-
Perry MO-
212 PM CDT SUN JUL 15 2018

...SIGNIFICANT WEATHER ADVISORY FOR PERRY COUNTY UNTIL 315 PM CDT...

At 212 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from St. Mary to near Perryville to near Womac.
Movement was east at 25 mph.

Half inch hail and winds in excess of 40 mph will be possible with
these storms.

Locations impacted include...
Perryville, St. Mary, Altenburg, Frohna, Longtown, Old Appleton,
Silver Lake and Lithium.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with these storms, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

Frequent cloud to ground lightning is occurring with these storms.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 3785 8979 3785 8974 3780 8967 3775 8966
      3775 8962 3771 8958 3769 8952 3764 8952
      3759 8948 3758 8959 3760 8961 3758 8968
      3760 8973 3760 8980 3761 8980 3760 9014
      3764 9015 3787 8995 3787 8990 3791 8984
TIME...MOT...LOC 1912Z 297DEG 20KT 3788 8993 3774 8997 3762 9013

07
Local storm report, Jul 15, 2:14 PM CDT, 2 hours 38 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PADUCAH KY
214 PM CDT SUN JUL 15 2018

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1242 PM     TSTM WND DMG     MAYFIELD                36.74N 88.65W
07/15/2018                   GRAVES             KY   PUBLIC

            ROOF DAMAGE TO A SAVE-A-LOT IN MAYFIELD. TIME ESTIMATED
            FROM RADAR.

&&

DWS
Special weather statement, Jul 15, 4:41 PM CDT, 11 minutes before
Special Weather Statement
National Weather Service Paducah KY
441 PM CDT SUN JUL 15 2018

ILZ092-MOZ087-110-111-152230-
Alexander IL-Stoddard MO-Cape Girardeau MO-Scott MO-
441 PM CDT SUN JUL 15 2018

...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL ALEXANDER...SCOTT...
NORTHEASTERN STODDARD AND SOUTHERN CAPE GIRARDEAU COUNTIES UNTIL 530
PM CDT...

At 440 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Scott City to Advance. Movement was
southeast at 20 mph.

Winds in excess of 40 mph will be possible with these storms.

Locations impacted include...
Cape Girardeau, Scott City, Chaffee, Advance, Oran, Benton, Morley,
Kelso, Bell City, Delta, Dutchtown, Olive Branch, Hay-Wood City,
Horseshoe Lake Conservation Area, Thebes, Vanduser, Blodgett,
Commerce and Lambert.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with these storms, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

These storms may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

LAT...LON 3682 8979 3711 8995 3713 8991 3713 8987
      3716 8986 3732 8956 3713 8927 3710 8926
      3709 8922 3707 8925 3707 8931 3706 8931
      3704 8929 3701 8934
TIME...MOT...LOC 2140Z 297DEG 17KT 3725 8958 3709 8990

RJP

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 15, 9:18 AM CDTSpecial Weather StatementPAHChristian, Todd, Trigg87 min
Jul 15, 9:56 AM CDTAreal Flood AdvisoryPAHChristian, Todd3 hr
Jul 15, 12:04 PM CDTSpecial Weather StatementPAHBallard, Calloway, Carlisle, Fulton, Graves, Hickman and 4 more86 min
Jul 15, 12:12 PM CDTAreal Flood AdvisoryPAHLivingston, McCracken, Marshall2 hr
Jul 15, 12:27 PM CDTSevere Thunderstorm WarningPAHLivingston, Lyon, McCracken, Marshall33 min
Jul 15, 12:38 PM CDTSevere Thunderstorm WarningPAHGraves22 min
Jul 15, 1:00 PM CDTSevere Thunderstorm WarningPAHCalloway, Graves, Marshall30 min
Jul 15, 1:08 PM CDTAreal Flood AdvisoryPAHCalloway, Lyon, Marshall, Trigg2 hr
Jul 15, 1:30 PM CDTSpecial Weather StatementPAHCaldwell, Calloway, Christian, Lyon, Marshall, Trigg90 min
Jul 15, 1:43 PM CDTSevere Thunderstorm WarningPAHTrigg17 min
Jul 15, 2:37 PM CDTAreal Flood AdvisoryPAHChristian, Todd113 min
Jul 14, 7:44 PM CDTSpecial Weather StatementPAHPerry31 min
Jul 14, 8:15 PM CDTSevere Thunderstorm WarningPAHPerry30 min
Jul 14, 10:22 PM CDTAreal Flood AdvisoryPAHJackson, Perry2 hr
Jul 15, 12:38 AM CDTAreal Flood AdvisoryPAHAlexander2 hr
Jul 15, 5:17 PM CDTSpecial Weather StatementPAHAlexander, Pulaski43 min
Jul 15, 6:30 PM CDTAreal Flood AdvisoryPAHFranklin, Williamson3 hr
Jul 15, 6:52 PM CDTFlash Flood WarningPAHFranklin, Williamson3 hr
Jul 14, 7:12 PM CDTSpecial Weather StatementPAHWayne18 min
Jul 14, 9:05 PM CDTSpecial Weather StatementPAHPerry25 min
Jul 14, 10:09 PM CDTSpecial Weather StatementPAHCarter, Ripley51 min
Jul 15, 2:12 PM CDTSpecial Weather StatementPAHPerry63 min
Jul 15, 4:25 PM CDTAreal Flood AdvisoryPAHBollinger, Cape Girardeau2 hr
Jul 15, 4:41 PM CDTSpecial Weather StatementPAHScott49 min
Jul 15, 5:20 PM CDTSpecial Weather StatementPAHRipley25 min
Jul 15, 5:51 PM CDTSpecial Weather StatementPAHStoddard54 min

Nearby

Severe Thunderstorm Warnings in Illinois, 2018Severe Thunderstorm Warnings in Missouri, 2018Every severe thunderstorm warning in 2018

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.