Alert archive / Illinois / Special Weather Statements in 2017

Special Weather Statement, NWS St. Louis, MO

June 29, 2017Pike County, Illinois

NWS St. Louis, MO issued this special weather statement at Jun 29, 2017, 12:15 AM CDT for Pike County, Illinois. It was in force for 45 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: Jun 29, 2017, 12:15 AM CDT (05:15 UTC)
Expired: Jun 29, 2017, 1:00 AM CDT
In force: 45 min
Issued by: NWS St. Louis, MO

County Pike County, IL

The radar

The St Louis radar (KLSX), 122 km from the middle of the area, began a volume at 05:17 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, 5.3 hours before the alert went out and 203 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: 1521 J/kg
Mixed-layer CIN: -10 J/kg
Mixed-layer LCL: 1099 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 259 m²/s²
0-3 km storm-relative helicity: 334 m²/s²
Significant tornado parameter: 2.7
Supercell composite: 15.1

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 Jun 29, 12:08 AM CDT, 7 minutes earlier.

Area forecast discussion, Jun 29, 12:08 AM CDT, 7 minutes before

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Hazardous weather outlook, Jun 28, 3:19 PM CDT, 8 hours 56 minutes before

Hazardous Weather Outlook
National Weather Service Saint Louis MO
319 PM CDT Wed Jun 28 2017

ILZ058>060-064-065-069-070-074-079-095>102-MOZ018-019-026-027-
034>036-041-042-047>052-059>065-072>075-084-085-099-291130-
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-
319 PM CDT Wed Jun 28 2017

This hazardous weather outlook is for portions of eastern and
central Missouri as well as west central and southwest Illinois.

.DAY ONE...Tonight

Scattered strong to severe storms are possible tonight across
northeast Missouri into west central Illinois. The main threats
with these storms would be locally damaging winds to 60 mph and
hail to the size of quarters. Locally heavy rainfall will be
possible across this area as well.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday

Strong to severe storms are possible Thursday through Thursday
night along with locally heavy rainfall...mainly along and north
of Interstate 70.

Another round of strong to severe storms are possible areawide Friday
afternoon into Friday evening.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed late tonight through the end of
the week.

KD

In the hours before

Local storm report, Jun 28, 11:44 PM CDT, 31 minutes before

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Special weather statement, Jun 29, 12:15 AM CDT, 0 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 28, 9:41 PM CDT	Severe Thunderstorm Warning	LSX	Knox, Shelby	49 min
Jun 28, 10:24 PM CDT	Severe Thunderstorm Warning	LSX	Knox, Lewis, Marion, Shelby	23 min
Jun 29, 12:51 PM CDT	Special Weather Statement	LSX	Boone	39 min
Jun 29, 1:19 PM CDT	Special Weather Statement	LSX	Moniteau	41 min
Jun 29, 1:51 PM CDT	Special Weather Statement	LSX	Osage	39 min
Jun 29, 2:23 PM CDT	Special Weather Statement	LSX	Gasconade, Osage	52 min
Jun 29, 2:28 PM CDT	Severe Thunderstorm Warning	LSX	Gasconade, Osage	47 min
Jun 29, 2:49 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Warren	56 min
Jun 29, 3:22 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Saint Charles, Saint Louis	40 min
Jun 29, 4:15 PM CDT	Special Weather Statement	LSX	Marion	45 min

Nearby

Special Weather Statements in Illinois, 2017 Every 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.