Alert archive / Illinois / Special Weather Statements in 2017

Special Weather Statement, NWS Lincoln, IL

July 26, 2017Tazewell County, Illinois

NWS Lincoln, IL issued this special weather statement at Jul 26, 2017, 8:10 PM CDT for Tazewell County, Illinois. 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
Jul 26, 2017, 8:10 PM CDT (01:10 UTC)
Expired
Jul 26, 2017, 8:45 PM CDT
In force
35 min
Issued by
NWS Lincoln, IL

County Tazewell County, IL

The radar

The Lincoln radar (KILX), 36 km from the middle of the area, began a volume at 01:11 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

Lincoln, IL (KILX), launched 00:00Z, 1.2 hours before the alert went out and 86 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, Lincoln, IL at 00:00Z on 2017-07-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2000 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, Lincoln, IL at 00:00Z on 2017-07-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 55 square meters per square second.193958Sfc1 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
2000 J/kg
Mixed-layer CIN
-16 J/kg
Mixed-layer LCL
1104 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
55 m²/s²
0-3 km storm-relative helicity
91 m²/s²
Significant tornado parameter
0.3
Supercell composite
4.2

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 Lincoln, IL wrote its last area forecast discussion before this special weather statement went out at Jul 26, 2:57 PM CDT, 5 hours 13 minutes earlier.

Area forecast discussion, Jul 26, 2:57 PM CDT, 5 hours 13 minutes before
Area Forecast Discussion
National Weather Service Lincoln IL
257 PM CDT Wed Jul 26 2017

.SHORT TERM...(Today and tonight)
ISSUED AT 251 AM CDT Wed Jul 26 2017

Stationary front near Mississippi River will push east this
evening bringing periods of thunderstorms to the region mainly
overnight. As evidenced by the 12z area soundings and the limited
convection so far this afternoon, the 12z NAM seems to be
overdoing moisture content of the atmosphere above the boundary
layer. Based on 12z GFS and ECMWF, areas of 1 to 2 inch rains
with locally higher amounts still will be possible as an
approaching shortwave interacts with the boundary. In addition
moisture levels should increase as a LLJ develops this evening,
but NAM is substantially higher than other models with amount of
moisture transport. With 3-hr flash flood guidance mostly above
2.5 inches, flood threat should not be widespread and we will be
cancelling the Flash Flood Watch that had been in effect for
tonight and early Thursday.

.LONG TERM...(Thursday through Tuesday)
ISSUED AT 251 AM CDT Wed Jul 26 2017

The precip should linger through much of the day Thursday,
particularly south of I-74, as the boundary gets hung up between
tonight's shortwave and a stronger shortwave approaching the area
tomorrow. The bulk of the moisture should be pushed south of the
area though and although this next wave will have stronger
dynamics, clouds will keep instability limited. The main impact
will be clearing us out after its passage and setting us up for a
prolonged period of northwest flow and below seasonal temperatures
through much of next week.

As the pattern of trough east and ridge to our west remains
through the period, high pressure will dominate at the surface.
Although several waves will top the ridge they should have minimal
impact on the region as low-level moisture is bottled up in the
deep south by the surface ridge.

Next chance of precip will be toward the later half of next week
as a stronger wave breaks down the ridge to our west.

&&

.AVIATION...(For the 18Z TAFS through 18Z Thursday afternoon)
Issued at 1210 PM CDT Wed Jul 26 2017

Stationary front near the Mississippi River will begin to push
east ahead of a shortwave moving southeast into the Lower Missouri
Valley this afternoon. Scattered convection will likely develop
along this boundary but coverage limits due to relatively dry
atmosphere warrant leaving out of terminals at this time. Best
chances of anything impacting our area would be at KSPI.

Better chances of convection will move southeast with the area
overnight associated with the aforementioned shortwave. Periods of
Precipitation and possibly some MVFR ceilings will persist through
the morning Thursday as a cold front stalls over the area in wake
of the shortwave.

&&

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

SHORT TERM...Barker
LONG TERM...Barker
AVIATION...Barker
Hazardous weather outlook, Jul 26, 3:03 PM CDT, 5 hours 7 minutes before
Hazardous Weather Outlook
National Weather Service Lincoln IL
303 PM CDT Wed Jul 26 2017

ILZ027>031-037-038-043>046-055-057-271100-
Champaign-De Witt-Douglas-Edgar-Knox-Marshall-McLean-Peoria-Piatt-
Stark-Tazewell-Vermilion-Woodford-
303 PM CDT Wed Jul 26 2017

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

.DAY ONE...TONIGHT...

Scattered showers and thunderstorms will track across the area
tonight. While a few of the storms could produce gusty winds
during the evening...widespread severe weather is not expected.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY...

Scattered thunderstorms will continue into Thursday. Storm total
rainfall by Thursday evening will range from 0.50 to 1.00 along
the I-74 corridor...with higher amounts focused further southwest.

.SPOTTER INFORMATION STATEMENT...

Limited spotter activation may be needed this evening.

ILZ036-040>042-047>054-056-061-271100-
Cass-Christian-Coles-Fulton-Logan-Macon-Mason-Menard-Morgan-
Moultrie-Sangamon-Schuyler-Scott-Shelby-
303 PM CDT Wed Jul 26 2017

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

.DAY ONE...TONIGHT...

Scattered showers and thunderstorms will track across the area
tonight. While a few of the storms could produce gusty winds
during the evening...widespread severe weather is not expected.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY...

Scattered thunderstorms will continue into Thursday. Storm total
rainfall by Thursday evening will range from 1.00 to 1.50.

Minor flooding will occur on the Illinois River near Havana through
the weekend.

.SPOTTER INFORMATION STATEMENT...

Limited spotter activation may be needed this evening.

ILZ062-063-066>068-071>073-271100-
Clark-Clay-Crawford-Cumberland-Effingham-Jasper-Lawrence-Richland-
303 PM CDT Wed Jul 26 2017

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

.DAY ONE...TONIGHT...

Scattered showers and thunderstorms will track across the area
tonight. While a few of the storms could produce gusty winds
during the evening...widespread severe weather is not expected.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY...

Scattered thunderstorms will continue into Thursday. Storm total
rainfall by Thursday night will range from 1.25 to 1.75.

Minor flooding will continue on the Wabash River near Hutsonville
through Thursday.

.SPOTTER INFORMATION STATEMENT...

Limited spotter activation may be needed this evening.

Barnes

In the hours before

Special weather statement, Jul 26, 5:41 PM CDT, 2 hours 29 minutes before
Special Weather Statement
National Weather Service Lincoln IL
541 PM CDT WED JUL 26 2017

ILZ067-068-072-073-262300-
Richland-Jasper-Lawrence-Crawford-
541 PM CDT WED JUL 26 2017

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN LAWRENCE...
SOUTHWESTERN CRAWFORD AND NORTHEASTERN RICHLAND COUNTIES UNTIL 600 PM
CDT...

At 540 PM CDT, Doppler radar was tracking a strong thunderstorm near
Claremont, or 8 miles northeast of Olney, moving east at 20 mph.

Half inch hail and winds in excess of 40 mph will be possible with
this storm.

Locations impacted include...
Lawrenceville, Sumner, Claremont, Chauncey, Hardinville, Red Hills
State Park and Petrolia.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 3867 8802 3885 8806 3895 8773 3869 8766
TIME...MOT...LOC 2240Z 257DEG 19KT 3878 8795

37
Special weather statement, Jul 26, 6:52 PM CDT, 1 hour 18 minutes before
Special Weather Statement
National Weather Service Lincoln IL
652 PM CDT WED JUL 26 2017

ILZ036-270015-
Fulton-
652 PM CDT WED JUL 26 2017

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN FULTON COUNTY UNTIL
715 PM CDT...

At 651 PM CDT, Doppler radar was tracking a strong thunderstorm near
New Philadelphia, or 15 miles east of Macomb, moving east at 20 mph.

Wind gusts up to 50 mph will be possible with this storm.

Locations impacted include...
Canton, Lewistown, Cuba, Avon, Fairview, Smithfield, Bryant,
Marietta, Ellisville and Fiatt.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 4068 9044 4065 9006 4036 9013 4044 9045
TIME...MOT...LOC 2351Z 280DEG 17KT 4054 9041

37
Special weather statement, Jul 26, 8:10 PM CDT, 0 minutes before
Special Weather Statement
National Weather Service Lincoln IL
810 PM CDT WED JUL 26 2017

ILZ029-037-038-041-042-270145-
Logan-Tazewell-Peoria-Mason-McLean-
810 PM CDT WED JUL 26 2017

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN LOGAN...TAZEWELL...
SOUTHWESTERN MCLEAN...NORTHEASTERN MASON AND SOUTH CENTRAL PEORIA
COUNTIES UNTIL 845 PM CDT...

At 809 PM CDT, Doppler radar was tracking strong thunderstorms
along a line from near Bartonville to Forest City, moving east at 35
mph.

Wind gusts up to 50 mph will be possible with these storms.

Locations impacted include...
Pekin, East Peoria, Morton, Bartonville, Creve Coeur, Marquette
Heights, Tremont, Mackinaw, Atlanta, Delavan, Manito, Minier,
Danvers, South Pekin, Hopedale, Green Valley, Stanford, Emden,
Armington and North Pekin.

This includes the following highways...
 Interstate 155 between mile markers 9 and 31.
 Interstate 474 between mile markers 9 and 12.
 Interstate 55 between mile markers 138 and 142.
 Interstate 74 near mile marker 121.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 4038 8983 4065 8969 4057 8911 4023 8921
TIME...MOT...LOC 0109Z 277DEG 30KT 4049 8963

37

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 26, 8:43 PM CDTSpecial Weather StatementILXMenard32 min
Jul 26, 9:02 PM CDTSevere Thunderstorm WarningILXMenard, Sangamon43 min
Jul 26, 9:14 PM CDTSevere Thunderstorm WarningILXLogan, Mason, Menard46 min
Jul 26, 10:17 PM CDTSpecial Weather StatementILXSangamon43 min
Jul 26, 10:48 PM CDTAreal Flood AdvisoryILXChristian, Sangamon3 hr
Jul 27, 12:46 AM CDTSpecial Weather StatementILXClay, Jasper, Richland59 min

Nearby

Special Weather Statements in Illinois, 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.