Alert archive / Illinois / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 163, NWS Lincoln, IL

October 14, 2017McLean County, Illinois

NWS Lincoln, IL issued this severe thunderstorm warning at Oct 14, 2017, 8:14 PM CDT for McLean County, Illinois. It was in force for 33 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: Oct 14, 2017, 8:14 PM CDT (01:14 UTC)
Expired: Oct 14, 2017, 8:47 PM CDT
In force: 33 min
Issued by: NWS Lincoln, IL
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County McLean County, IL

The radar

The Lincoln radar (KILX), 70 km from the middle of the area, began a volume at 01:16 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The watch it was issued in

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

Issued	Product	Office	Lasted
Oct 14, 5:09 PM CDT	Tornado Watch	SPC	8 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 1.2 hours before the alert went out and 59 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: 360 J/kg
Mixed-layer CIN: -18 J/kg
Mixed-layer LCL: 1518 m above ground
0-6 km bulk shear: 61 kt
0-1 km storm-relative helicity: 284 m²/s²
0-3 km storm-relative helicity: 335 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 3.1

Open this sounding in Storm Lab

The text

As transmitted.

737 
WUUS53 KILX 150114
SVRILX
ILC113-150200-
/O.NEW.KILX.SV.W.0163.171015T0114Z-171015T0200Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Lincoln IL
814 PM CDT SAT OCT 14 2017

The National Weather Service in Lincoln has issued a

* Severe Thunderstorm Warning for...
  Northeastern McLean County in central Illinois...

* Until 900 PM CDT

* At 814 PM CDT, a severe thunderstorm was located near Gridley, or
  15 miles north of Bloomington, moving east at 50 mph.

  HAZARD...60 mph wind gusts. 

  SOURCE...Radar indicated. 

  IMPACT...Expect damage to roofs, siding, and trees. 

* Locations impacted include...
  El Paso, Lexington, Hudson, Chenoa, Gridley, Colfax, Pleasant Hill,
  Cropsey, Anchor, Weston and Lake Bloomington.

This includes the following highways...
 Interstate 39 between mile markers 5 and 9.
 Interstate 55 between mile markers 173 and 187.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

A tornado watch remains in effect until 100 AM CDT for central
Illinois.

LAT...LON 4062 8858 4062 8846 4056 8846 4060 8909
      4063 8907 4063 8904 4066 8904 4066 8899
      4067 8898 4075 8898 4076 8859
TIME...MOT...LOC 0114Z 269DEG 44KT 4070 8891 

HAIL...<.75IN
WIND...60MPH
 
$$

25

2 follow-up statements

033 
WWUS53 KILX 150127
SVSILX

Severe Weather Statement
National Weather Service Lincoln IL
827 PM CDT SAT OCT 14 2017

ILC113-150200-
/O.CON.KILX.SV.W.0163.000000T0000Z-171015T0200Z/
McLean-
827 PM CDT SAT OCT 14 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM CDT
FOR NORTHEASTERN MCLEAN COUNTY...

At 827 PM CDT, a severe thunderstorm was located over Chenoa, or 10
miles south of Pontiac, moving east at 45 mph.

HAZARD...60 mph wind gusts. 

SOURCE...Radar indicated. 

IMPACT...Expect damage to roofs, siding, and trees. 

Locations impacted include...
Lexington, Chenoa, Gridley, Pleasant Hill, Cropsey, Anchor, Weston
and Lake Bloomington.

This includes Interstate 55 between mile markers 176 and 187.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.

&&

A tornado watch remains in effect until 100 AM CDT for central
Illinois.

LAT...LON 4062 8858 4062 8846 4056 8846 4063 8896
      4075 8892 4076 8859
TIME...MOT...LOC 0127Z 265DEG 41KT 4074 8871 

HAIL...<.75IN
WIND...60MPH
 
$$

25

963 
WWUS53 KILX 150147
SVSILX

Severe Weather Statement
National Weather Service Lincoln IL
847 PM CDT SAT OCT 14 2017

ILC113-150157-
/O.CAN.KILX.SV.W.0163.000000T0000Z-171015T0200Z/
McLean-
847 PM CDT SAT OCT 14 2017

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN MCLEAN COUNTY IS
CANCELLED...
        
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning has
been cancelled.

A tornado watch remains in effect until 100 AM CDT for central
Illinois.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Lincoln.

LAT...LON 4062 8858 4062 8846 4056 8846 4063 8896
      4075 8892 4076 8859
TIME...MOT...LOC 0145Z 269DEG 44KT 4074 8838 

$$

25

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 Lincoln, IL wrote its last area forecast discussion before this severe thunderstorm warning went out at Oct 14, 7:16 PM CDT, 58 minutes earlier.

Area forecast discussion, Oct 14, 7:16 PM CDT, 58 minutes before

Area Forecast Discussion
National Weather Service Lincoln IL
716 PM CDT Sat Oct 14 2017

.SHORT TERM...(This evening through Sunday)
ISSUED AT 310 PM CDT Sat Oct 14 2017

An outflow boundary from convection over northern IL has slipped
toward toward a Bloomington to Rushville line at mid afternoon.
Showers and thunderstorms were north of a Quincy to Bloomington
line and tracking ene. Partly to mostly sunny skies over central
and southern CWA has warmed temperatures into the mid 80s with
Lincoln setting a record high of 86F and Springfield up to 87F,
just a degree shy of the record high. Moist dewpoints in the mid
to upper 60s across CWA. Precipitable water values ranged from
1.5-1.9 inches, highest over northern CWA, which is at the 99
percentile for mid October. This is supporting the heavy rains
of 1-3 inches over northern IL. SPC day1 outlook has slight risk
of severe storms along and north of I-72 late this afternoon and
into this evening, while enhanced risk of severe over the IL river
valley where 30% risk of damaging winds and 5% risk of tornadoes.
A 1008 mb surface low pressure over central IA and a 1007 mb low
pressure over sw KS will eject ne and pull the cold front se over
central IL overnight, and thru southeast IL by mid Sunday
morning. Lows tonight to range from around 50F nw of the IL river,
to 60-65F along the Wabash river. Windy on Sunday with WNW winds
15-25 mph and gusts 25-35 mph ushering in much cooler air. Highs
Sunday range from mid 50s from Peoria and Bloomington north to
the mid 60s by the Wabash river. Clouds to decrease from west to
east during Sunday afternoon.

.LONG TERM...(Sunday night through Saturday)
ISSUED AT 310 PM CDT Sat Oct 14 2017

The coldest night of the season expected Sunday night as skies
clear and winds lighten up with 1030 mb high pressure settling
into OK by dawn Monday and ridging into central IL. Lows in the
upper 30s and lower 40s. A few patches of frost possible late
Sunday night and early Monday morning in low lying areas north of
I-70. An upper level trof over IL on Monday along with surface
ridge to keep it cool with highs Monday in the lower 60s. Another
seasonably cool night Monday night with lows mostly in the lower
40s.

A nice stretch of fall weather expected Tuesday through Saturday
as upper level trof pulls away from IL as surface ridge shifts
into the southeast states and getting a return southerly flow.
Strong upper level ridge builds over the eastern US later in the
week to keep it dry and bring in warmer weather. Highs Tue in the
upper 60s, then in the lower 70s Wed and in the 70s Thu-Sat. An
approaching cold front from the nw could bring next chance of
convection next Saturday night.

&&

.AVIATION...(For the 00Z TAFS through 00Z Sunday evening)
Issued at 716 PM CDT Sat Oct 14 2017

Multiple lines of showers and thunderstorms will cross central IL
this evening and overnight as a cold front approaches from the
west and passes through the area. First line of thunderstorms
looks to affect KPIA-KBMI area and could bring strong to severe
wind gusts. Overnight, a more extensive line of showers and
thunderstorms will bring more widespread thunderstorm activity.
Conditions generally VFR initially, with isolated IFR-MVFR
cigs/vsbys in thunderstorms. A larger period of MVFR cigs and
vsbys will be associated with the overnight line of showers and
thunderstorms, followed by several hours of MVFR cigs until
16-17Z. LLWS will also develop this evening as SW winds aloft
increase, continuing until 08-12Z after the cold front passes. Winds
initially E-SE north of a boundary over the area, including KPIA-
KBMI, while brisk southerly winds 10-20 kts affect areas to the
south. Winds will eventually shift to west and northwest after the
front passes through the area, with winds increasing to 15-20 kts
with gusts 25-30 kts.

&&

.CLIMATE...
Issued at 310 PM CDT Sat Oct 14 2017

Springfield's low of 67F at 8 am this morning matches the record
warm low of 67F set on Oct 14, 1899. If temperature stays at or
above 67F through 1 am cdt tonight, it will tie a new record warm
low for Oct 14th. Lincoln rose to 86F at 2 pm and broke the record
high of 85F set in 1908. Springfield rose to 88F at 212 pm and
tied the record high set back in 1897.

Here are the Record Highs for Today Oct 14th...

Lincoln....... 86 in 2017
Havana........ 86 in 1989
Rantoul....... 86 in 1989
Galesburg..... 87 in 1947
Springfield... 88 in 1897 & 2017
Peoria........ 89 in 1897
Bloomington... 89 in 1899
Danville...... 89 in 1897
Rushville..... 89 in 1947
Effingham..... 90 in 1899
Minonk........ 90 in 1897
Champaign..... 91 in 1899
Sullivan...... 91 in 1899
Robinson...... 91 in 1899
Charleston.... 92 in 1899
Jacksonville.. 93 in 1897
Tuscola....... 93 in 1899
Decatur....... 94 in 1899

&&

.ILX WATCHES/WARNINGS/ADVISORIES...
NONE.
&&

SHORT TERM...07
LONG TERM...07
AVIATION...37
CLIMATE...07

Hazardous weather outlook, Oct 14, 3:06 PM CDT, 5 hours 8 minutes before

Hazardous Weather Outlook
National Weather Service Lincoln IL
306 PM CDT Sat Oct 14 2017

ILZ027>031-036>038-040-041-151100-
Fulton-Knox-Marshall-Mason-McLean-Peoria-Schuyler-Stark-Tazewell-
Woodford-
306 PM CDT Sat Oct 14 2017

This Hazardous Weather Outlook is for portions of central
Illinois and west central Illinois.

.DAY ONE...TONIGHT...

Thunderstorms will move through the area this evening as a
frontal system approaches the area, and continue into tonight.
There is an enhanced risk that some of these storms could be
severe, with damaging winds, hail, and an isolated tornado
possible. Locally heavy rainfall will also be possible.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY...

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be required after 5 pm.

ILZ042>045-047>051-053-151100-
Cass-Champaign-De Witt-Logan-Macon-Menard-Morgan-Piatt-Sangamon-
Scott-
306 PM CDT Sat Oct 14 2017

This Hazardous Weather Outlook is for portions of central
Illinois, east central Illinois and west central Illinois.

.DAY ONE...TONIGHT...

Thunderstorms will move into the area this evening as a frontal
system approaches the area, and continue through tonight. There is
a slight risk that some of these storms could be severe, with
damaging winds, hail, and an isolated tornado possible. Locally
heavy rainfall will also be possible. The best chances for
hazardous weather will be after 6 pm.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY...

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be required tonight after 7 pm.

ILZ046-052-054>057-061>063-066-067-071-151100-
Christian-Clark-Clay-Coles-Cumberland-Douglas-Edgar-Effingham-
Jasper-Moultrie-Shelby-Vermilion-
306 PM CDT Sat Oct 14 2017

This Hazardous Weather Outlook is for portions of central
Illinois, east central Illinois and southeast Illinois.

.DAY ONE...TONIGHT...

Thunderstorms will move into the area this evening as a frontal
system approaches the area, and continue through tonight. Some of
these storms could be strong, with gusty winds and small hail. The
strongest storms will likely be after 8 pm.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY...

Some lingering thunderstorms will be possible Sunday morning.
Severe weather is not expected.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not anticipated through tonight.

ILZ068-072-073-151100-
Crawford-Lawrence-Richland-
306 PM CDT Sat Oct 14 2017

This Hazardous Weather Outlook is for portions of southeast
Illinois.

.DAY ONE...TONIGHT...

Thunderstorms are possible late tonight as a cold front moves
through the area. These storms are not expected to become severe.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY...

Some lingering thunderstorms will be possible Sunday morning.
Severe weather is not expected.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not anticipated through tonight.

Barker

In the hours before

Local storm report, Oct 14, 4:03 PM CDT, 4 hours 11 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LINCOLN IL
403 PM CDT SAT OCT 14 2017

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

0315 PM     HEAVY RAIN       GALESBURG               40.95N 90.38W
10/14/2017  M1.60 INCH       KNOX               IL   TRAINED SPOTTER

            STORM TOTAL SO FAR

&&

EJL

Local storm report, Oct 14, 4:18 PM CDT, 3 hours 56 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LINCOLN IL
418 PM CDT SAT OCT 14 2017

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

0400 PM     HEAVY RAIN       GALESBURG               40.95N 90.38W
10/14/2017  E1.50 INCH       KNOX               IL   PUBLIC

            STORM TOTAL SO FAR

&&

EJL

Local storm report, Oct 14, 7:16 PM CDT, 58 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LINCOLN IL
716 PM CDT SAT OCT 14 2017

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

0658 PM     TSTM WND DMG     ELMWOOD                 40.78N 89.97W
10/14/2017                   PEORIA             IL   EMERGENCY MNGR

            TREE BRANCHES ABOUT 8 TO 12 INCHES IN DIAMATER SNAPPED

0703 PM     TSTM WND GST     FIATT                   40.57N 90.18W
10/14/2017  E70 MPH          FULTON             IL   EMERGENCY MNGR

            ESTIMATED 70 MPH THUNDERSTORM WIND GUST NEAR ROUTE 97 AND
            ROUTE 9 JUNCTION

0700 PM     FLOOD            GALESBURG               40.95N 90.38W
10/14/2017                   KNOX               IL   TRAINED SPOTTER

            ESTIMATED 2 FEET OF WATER COVERING ROAD...ROAD UNPASSABLE

0609 PM     TSTM WND DMG     GALESBURG               40.95N 90.38W
10/14/2017                   KNOX               IL   LAW ENFORCEMENT

            SEVERAL LARGE TREES AND TREE BRANCHES BLOWN DOWN AROUND
            TOWN...TIME ESTIMATED BY RADAR

0650 PM     FLOOD            GALESBURG               40.95N 90.38W
10/14/2017                   KNOX               IL   LAW ENFORCEMENT

            SEVERAL STREETS IN TOWN FLOODED...SOME CARS STALLED

&&

EJL

Local storm report, Oct 14, 7:34 PM CDT, 40 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LINCOLN IL
734 PM CDT SAT OCT 14 2017

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

0712 PM     TSTM WND DMG     CHILLICOTHE             40.92N 89.50W
10/14/2017                   PEORIA             IL   TRAINED SPOTTER

            ESTIMATED 12 INCH DIAMETER TREE BRANCH BLOWN DOWN ON
            ROAD...TIME ESTIMATED BY RADAR

&&

EJL

Local storm report, Oct 14, 7:35 PM CDT, 39 minutes before

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE LINCOLN IL
735 PM CDT SAT OCT 14 2017

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

0315 PM     HEAVY RAIN       GALESBURG               40.95N 90.38W
10/14/2017  M1.60 INCH       KNOX               IL   TRAINED SPOTTER

            STORM TOTAL SO FAR

0400 PM     HEAVY RAIN       GALESBURG               40.95N 90.38W
10/14/2017  E1.50 INCH       KNOX               IL   PUBLIC

            STORM TOTAL SO FAR

0609 PM     TSTM WND DMG     GALESBURG               40.95N 90.38W
10/14/2017                   KNOX               IL   LAW ENFORCEMENT

            SEVERAL LARGE TREES AND TREE BRANCHES BLOWN DOWN AROUND
            TOWN...TIME ESTIMATED BY RADAR

0650 PM     FLOOD            GALESBURG               40.95N 90.38W
10/14/2017                   KNOX               IL   LAW ENFORCEMENT

            SEVERAL STREETS IN TOWN FLOODED...SOME CARS STALLED

0658 PM     TSTM WND DMG     ELMWOOD                 40.78N 89.97W
10/14/2017                   PEORIA             IL   EMERGENCY MNGR

            TREE BRANCHES ABOUT 8 TO 12 INCHES IN DIAMATER SNAPPED

0700 PM     FLOOD            GALESBURG               40.95N 90.38W
10/14/2017                   KNOX               IL   TRAINED SPOTTER

            ESTIMATED 2 FEET OF WATER COVERING ROAD...ROAD UNPASSABLE

0703 PM     TSTM WND GST     FIATT                   40.57N 90.18W
10/14/2017  E70.00 MPH       FULTON             IL   EMERGENCY MNGR

            ESTIMATED 70 MPH THUNDERSTORM WIND GUST NEAR ROUTE 97 AND
            ROUTE 9 JUNCTION

0712 PM     TSTM WND DMG     CHILLICOTHE             40.92N 89.50W
10/14/2017                   PEORIA             IL   TRAINED SPOTTER

            ESTIMATED 12 INCH DIAMETER TREE BRANCH BLOWN DOWN ON
            ROAD...TIME ESTIMATED BY RADAR

&&

EJL

Local storm report, Oct 14, 8:03 PM CDT, 11 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LINCOLN IL
803 PM CDT SAT OCT 14 2017

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

0745 PM     HEAVY RAIN       5 NW PEORIA             40.80N 89.68W
10/14/2017  M1.38 INCH       PEORIA             IL   CO-OP OBSERVER

            STORM TOTAL SO FAR

&&

EJL

The office that day

Everything else NWS Lincoln, IL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Oct 14, 7:00 PM CDT	Severe Thunderstorm Warning	ILX	Marshall, Peoria, Tazewell, Woodford	45 min
Oct 14, 7:26 PM CDT	Severe Thunderstorm Warning	ILX	Marshall, Peoria, Tazewell, Woodford	49 min
Oct 14, 8:45 PM CDT	Special Weather Statement	ILX	Fulton, Knox	45 min
Oct 14, 11:47 PM CDT	Special Weather Statement	ILX	Menard	28 min
Oct 15, 12:09 AM CDT	Special Weather Statement	ILX	Logan	36 min

Nearby

Severe Thunderstorm Warnings in Illinois, 2017 Every severe thunderstorm warning 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.