Alert archive / Illinois / Special Weather Statements in 2017
Special Weather Statement, NWS St. Louis, MO
NWS St. Louis, MO issued this special weather statement at May 10, 2017, 8:50 PM CDT for Jersey County, Illinois. It was in force for 25 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 10, 2017, 8:50 PM CDT (01:50 UTC)
- Expired
- May 10, 2017, 9:15 PM CDT
- In force
- 25 min
- Issued by
- NWS St. Louis, MO
County Jersey County, IL
The radar
The St Louis radar (KLSX), 42 km from the middle of the area, began a volume at 01:51 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, 1.8 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.
- Mixed-layer CAPE
- 442 J/kg
- Mixed-layer CIN
- -26 J/kg
- Mixed-layer LCL
- 1634 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 104 m²/s²
- 0-3 km storm-relative helicity
- 140 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 3.0
The text
As transmitted.
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</html>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 10, 6:42 PM CDT, 2 hours 8 minutes earlier.
Area forecast discussion, May 10, 6:42 PM CDT, 2 hours 8 minutes before
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</html>Hazardous weather outlook, May 10, 3:33 PM CDT, 5 hours 17 minutes before
Hazardous Weather Outlook National Weather Service Saint Louis MO 333 PM CDT Wed May 10 2017 ILZ058>060-064-065-069-070-074-079-095>102-MOZ018-019-026-027- 034>036-041-042-047>052-059>065-072>075-084-085-099-111200- 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- 333 PM CDT Wed May 10 2017 This hazardous weather outlook is for portions of eastern and central Missouri as well as west central and southwest Illinois. .DAY ONE...Tonight A few strong to locally severe thunderstorms are possible this evening into the early overnight hours mainly across portions of northeastern Missouri and west-central Illinois. Damaging winds and large hail are the primary threats. Locally heavy rainfall may also lead to localized flash flooding tonight. Major flooding continues along portions of the Illinois River. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday Scattered severe thunderstorms are also possible on Thursday afternoon and early evening, mainly across portions of southeastern Missouri and southwest Illinois. Major river flooding is forecast to continue on portions of the Illinois River through Friday. .SPOTTER INFORMATION STATEMENT... Spotter activation is possible through tonight. Spotters are encouraged to report any type of severe weather to the National Weather Service. KD
In the hours before
Special weather statement, May 10, 5:18 PM CDT, 3 hours 32 minutes before
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</html>Special weather statement, May 10, 5:55 PM CDT, 2 hours 55 minutes before
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</html>The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 10, 7:16 PM CDT | Severe Thunderstorm Warning | LSX | Pike | 44 min |
| May 10, 8:14 PM CDT | Special Weather Statement | LSX | Lincoln | 31 min |
| May 11, 6:25 PM CDT | Special Weather Statement | LSX | Reynolds | 50 min |
| May 10, 9:23 PM CDT | Special Weather Statement | LSX | Jersey | 37 min |
| May 10, 9:31 PM CDT | Severe Thunderstorm Warning | LSX | Jersey, Macoupin, Madison | 27 min |
| May 10, 11:33 PM CDT | Flash Flood Warning | LSX | Bond, Fayette, Madison, Marion, Montgomery | 6 hr |
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.