Alert archive / Illinois / Special Weather Statements in 2016

Special Weather Statement, NWS St. Louis, MO

May 26, 2016Adams County, Illinois

NWS St. Louis, MO issued this special weather statement at May 26, 2016, 9:39 PM CDT for Adams County, Illinois. It was in force for 51 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
May 26, 2016, 9:39 PM CDT (02:39 UTC)
Expired
May 26, 2016, 10:30 PM CDT
In force
51 min
Issued by
NWS St. Louis, MO

County Adams County, IL

The radar

The St Louis radar (KLSX), 145 km from the middle of the area, began a volume at 02:39 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

Davenport, (KDVN), launched 00:00Z, 2.7 hours before the alert went out and 205 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, Davenport, at 00:00Z on 2016-05-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 846 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, Davenport, at 00:00Z on 2016-05-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 13 square meters per square second.19395878Sfc1 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
846 J/kg
Mixed-layer CIN
-96 J/kg
Mixed-layer LCL
1759 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
13 m²/s²
0-3 km storm-relative helicity
37 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.5

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 St. Louis, MO wrote its last area forecast discussion before this special weather statement went out at May 26, 6:39 PM CDT, 3 hours earlier.

Area forecast discussion, May 26, 6:39 PM CDT, 3 hours before
Area Forecast Discussion...Updated Aviation
National Weather Service Saint Louis MO
639 PM CDT THU MAY 26 2016

.SHORT TERM...  (Through Late Tonight)
Issued at 310 PM CDT Thu May 26 2016

Convection from morning MCS has finally shifted southeast of our
forecast area this afternoon. Convection was currently developing
across northwest MO and this activity may eventually shift east
into northeast MO this evening. New development is also expected
across southwest MO along a weak warm front and also along an
outflow boundary left over from the morning convective complex.
These storms should move northeastward into central MO this
evening. Activity may congeal into an MCS later this evening and
overnight and impact much of the forecast area, eventually moving
into our IL counties late tonight. Some of the storms this evening
may be severe, especially across northeast and central MO where
the better instability and shear exists.

GKS

.LONG TERM...  (Friday through Next Thursday)
Issued at 310 PM CDT Thu May 26 2016

A better potential for widespread showers/storms is expected on
Friday and Friday night as the upper level trough now over the
southwest US approaches our area. Will go with likely to
catagorical pops. The high temperatures will be cooler on Friday
due to the cloud cover and widespread and potentially long lasting
precipitation. At least scattered showers/storms should occur on
Saturday and Saturday evening until the upper level trough shifts
northeast of our area. Quieter and drier weather is expected by
Sunday as a weak surface trough moves southeastward through the
forecast area with only slight chance pops over the southern and
eastern portion of the forecast area. Precipitation chances should
increase again by Tuesday as an upper level trough moves eastward
through the northern Plains sending a cold front southeastward
through our area. The ECMWF model is quicker than the GFS with the
progression of the upper level trough and associated cold front.
Potentially cooler and less humid conditions can be expected by
the end of the extended forecast period after the passage of the
cold front.

GKS

&&

.AVIATION...  (For the 00z TAFs through 00z Friday Evening)
Issued at 623 PM CDT Thu May 26 2016

Cluster of thunderstorms is slowly heading northward toward KCOU
so added a TEMPO group to account for this activity. Believe KUIN
and metro terminals should continue to stay dry through the
evening with chances of showers and thunderstorms increasing
overnight tonight. Still hard to pin down best chances of activity
at these terminals so did not deviate too much from previous
forecast. Chances of showers and storms should continue through
the day on Friday as main upper-level shortwave finally ejects out
of the desert southwest. MVFR visibilities and ceilings possible
in thunderstorms with IFR visibilities possible in heavier
activity. Surface pressure gradient will also tighten across
eastern Missouri so added some wind gusts to the metro terminals.

Specifics for KSTL:

Still lots of uncertainty on how convection will evolve tonight.
Will have to watch areas to the south/southwest and see how
convection develops tonight but current expectation is for chances
to increase toward midnight tonight. Probably will be at least one period
of showers/storms with visibility impacts with chances of storms
through Friday evening. Wind speeds will also increase as pressure
gradient tightens so added some wind gusts for Friday afternoon of
around 25 knots.

Gosselin

&&

.LSX WATCHES/WARNINGS/ADVISORIES...
MO...None.
IL...None.
&&

WFO LSX
Hazardous weather outlook, May 26, 3:54 PM CDT, 5 hours 45 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE ST LOUIS MO
354 PM CDT THU MAY 26 2016

ILZ058>060-064-065-069-070-074-079-095>102-MOZ018-019-026-027-
034>036-041-042-047>052-059>065-072>075-084-085-099-271115-
GREENE IL-MACOUPIN IL-MONTGOMERY IL-BOND IL-FAYETTE IL-CLINTON IL-
MARION IL-WASHINGTON IL-RANDOLPH IL-ADAMS IL-BROWN IL-PIKE IL-
CALHOUN IL-JERSEY IL-MADISON IL-SAINT CLAIR IL-MONROE IL-KNOX MO-
LEWIS MO-SHELBY MO-MARION MO-MONROE MO-RALLS MO-PIKE MO-BOONE MO-
AUDRAIN MO-MONITEAU MO-COLE MO-OSAGE MO-CALLAWAY MO-MONTGOMERY MO-
LINCOLN MO-GASCONADE MO-WARREN MO-SAINT CHARLES MO-FRANKLIN MO-
SAINT LOUIS MO-SAINT LOUIS CITY MO-JEFFERSON MO-CRAWFORD MO-
WASHINGTON MO-SAINT FRANCOIS MO-SAINTE GENEVIEVE MO-IRON MO-
MADISON MO-REYNOLDS MO-
354 PM CDT THU MAY 26 2016

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EASTERN AND
CENTRAL MISSOURI AS WELL AS WEST CENTRAL AND SOUTHWEST ILLINOIS.

.DAY ONE...TONIGHT

THUNDERSTORMS ARE LIKELY TONIGHT. A FEW OF THE THUNDERSTORMS MAY
BECOME SEVERE AND CAPABLE OF PRODUCING LARGE HAIL AND DAMAGING
WINDS...ESPECIALLY ACROSS NORTHEAST AND CENTRAL MISSOURI.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

THE THREAT OF THUNDERSTORMS WILL CONTINUE THROUGH SATURDAY NIGHT.
ISOLATED STRONG TO SEVERE THUNDERSTORMS ARE POSSIBLE SATURDAY AND
SATURDAY NIGHT...MAINLY ACROSS NORTHEAST AND CENTRAL MISSOURI.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED TONIGHT.

GKS

In the hours before

Local storm report, May 26, 7:37 PM CDT, 2 hours 2 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
737 PM CDT THU MAY 26 2016

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

0639 AM     TSTM WND DMG     2 ESE UNION             38.44N  90.98W
05/26/2016                   FRANKLIN           MO   BROADCAST MEDIA

            SEVERAL LARGE TREE LIMBS DOWN ONE MILE EAST OF EAST
            CENTRAL COLLEGE ON DEMARK ROAD FROM APPARENT MICROBURST.
            TIME ESTIMATED FROM RADAR.

&&

GOSSELIN
Special weather statement, May 26, 7:54 PM CDT, 1 hour 45 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
754 PM CDT THU MAY 26 2016

MOZ048>050-270145-
OSAGE MO-COLE MO-CALLAWAY MO-
754 PM CDT THU MAY 26 2016

...SIGNIFICANT WEATHER ADVISORY FOR COLE...SOUTHERN CALLAWAY AND
CENTRAL OSAGE COUNTIES UNTIL 845 PM CDT...

AT 754 PM CDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM OVER
WARDSVILLE...MOVING NORTHEAST AT 35 MPH.

DIME SIZE HAIL AND WIND GUSTS UP TO 50 MPH WILL BE POSSIBLE WITH THIS
STORM.

LOCATIONS IMPACTED INCLUDE...
JEFFERSON CITY...FULTON...HOLTS SUMMIT...WARDSVILLE...TAOS...
NEW BLOOMFIELD...CHAMOIS...WESTPHALIA...LAKE MYKEE TOWN...
ST. THOMAS...HICKORY HILL...LAKE MYKEE...BRAZITO...META...MOKANE...
WAINWRIGHT...FRANKENSTEIN...CARRINGTON...OSAGE CITY AND STEEDMAN.

THIS ALSO INCLUDES  CLARKS HILL/NORTON HISTORIC SITE AND JEFFERSON
LANDING HISTORIC SITE.

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.

THIS STORM 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.

&&

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 100 AM CDT FOR
CENTRAL MISSOURI.

LAT...LON 3865 9227 3865 9222 3870 9223 3874 9218
      3880 9216 3881 9213 3883 9215 3891 9216
      3875 9170 3829 9210 3829 9219 3834 9220
      3832 9225 3834 9229 3834 9240
TIME...MOT...LOC 0054Z 205DEG 32KT 3848 9216

CARNEY
Special weather statement, May 26, 9:39 PM CDT, 0 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
939 PM CDT THU MAY 26 2016

ILZ095-MOZ019-027-035-270330-
ADAMS IL-RALLS MO-MARION MO-LEWIS MO-
939 PM CDT THU MAY 26 2016

...SIGNIFICANT WEATHER ADVISORY FOR WESTERN ADAMS...SOUTHEASTERN
LEWIS...NORTH CENTRAL RALLS AND EASTERN MARION COUNTIES UNTIL 1030 PM
CDT...

AT 939 PM CDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR
HANNIBAL...MOVING NORTH AT 35 MPH.

NICKEL SIZE HAIL AND WIND GUSTS UP TO 50 MPH WILL BE POSSIBLE WITH
THIS STORM.

LOCATIONS IMPACTED INCLUDE...
QUINCY...HANNIBAL...PALMYRA...MENDON...LA GRANGE...FALL CREEK...
RENSSELAER...BURTON...URSA...LORAINE...TAYLOR...LIMA...MARBLEHEAD...
FOWLER AND MEYER.

THIS INCLUDES INTERSTATE 172 BETWEEN EXITS 2 AND 19.

THIS ALSO INCLUDES  WAKONDA STATE PARK.

THIS STORM 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 4017 9116 3976 9129 3975 9137 3973 9137
      3969 9131 3961 9134 3965 9157 4020 9150
      4020 9142
TIME...MOT...LOC 0239Z 189DEG 31KT 3972 9144

CARNEY

The office that day

Everything else NWS St. Louis, MO issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 26, 7:54 PM CDTSpecial Weather StatementLSXCole51 min
May 26, 8:39 PM CDTSevere Thunderstorm WarningLSXCole26 min
May 26, 10:14 PM CDTSpecial Weather StatementLSXSaint Charles46 min
May 26, 10:58 PM CDTSpecial Weather StatementLSXLincoln, Pike32 min
May 26, 11:39 PM CDTSpecial Weather StatementLSXPike51 min
May 27, 9:23 AM CDTRiver Flood WarningLSXReynolds4 days
May 27, 9:30 AM CDTRiver Flood WarningLSXBoone, Callaway, Cole, Moniteau6 days
May 27, 9:30 AM CDTRiver Flood WarningLSXCallaway, Osage7 days
May 27, 9:30 AM CDTRiver Flood WarningLSXGasconade, Montgomery9 days
May 27, 9:30 AM CDTRiver Flood WarningLSXGasconade, Montgomery7 days
May 27, 9:30 AM CDTRiver Flood WarningLSXFranklin, Warren6 days
May 27, 9:30 AM CDTRiver Flood WarningLSXSaint Charles, Saint Louis7 days
May 27, 9:44 AM CDTRiver Flood WarningLSXCrawford, Washington4 days

Nearby

Special Weather Statements in Illinois, 2016Every special weather statement in 2016

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.