Alert archive / Illinois / Wind Advisories in 2020

Wind Advisory 6, NWS St. Louis, MO

November 10, 20206 counties in Illinois; 4 counties in Missouri

NWS St. Louis, MO issued this wind advisory at Nov 10, 2020, 3:56 AM CST for 6 counties in Illinois; 4 counties in Missouri. It took effect at Nov 10, 2020, 12:00 PM CST. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued: Nov 10, 2020, 3:56 AM CST (09:56 UTC)
In effect from: Nov 10, 2020, 12:00 PM CST
Expired: Nov 10, 2020, 3:26 PM CST
In force: 3 hr
Issued by: NWS St. Louis, MO

Counties Adams County, IL, Brown County, IL, Greene County, IL, Macoupin County, IL, Montgomery County, IL, Pike County, IL, Knox County, MO, Lewis County, MO, Marion County, MO, Shelby County, MO

The radar

The St Louis radar (KLSX), 118 km from the middle of the area, began a volume at 09:56 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, 9.9 hours before the alert went out and 212 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1190 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 134 m²/s²
0-3 km storm-relative helicity: 183 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

862 
WWUS73 KLSX 100956
NPWLSX

URGENT - WEATHER MESSAGE
National Weather Service Saint Louis MO
356 AM CST Tue Nov 10 2020

ILZ058>060-095>097-MOZ018-019-026-027-102200-
/O.NEW.KLSX.WI.Y.0006.201110T1800Z-201111T0000Z/
Adams IL-Brown IL-Greene IL-Knox MO-Lewis MO-Macoupin IL-
Marion MO-Montgomery IL-Pike IL-Shelby MO-
Including the cities of Hannibal, Litchfield, Mount Sterling, 
Pittsfield, and Quincy
356 AM CST Tue Nov 10 2020

...WIND ADVISORY IN EFFECT FROM NOON TODAY TO 6 PM CST THIS
EVENING...

* WHAT...Southwest winds 20 to 25 mph with gusts up to 45 mph 
  expected.

* WHERE...In Missouri, Knox MO, Lewis MO, Shelby MO and Marion MO
  Counties. In Illinois, Greene IL, Macoupin IL, Montgomery IL,
  Adams IL, Brown IL and Pike IL Counties.

* IMPACTS...Gusty winds could blow around unsecured objects. 
  Tree limbs could be blown down and a few power outages may 
  result.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

Use extra caution when driving, especially if operating a high
profile vehicle. Secure outdoor objects.

&&

$$

Maples

1 follow-up statement

052 
WWUS73 KLSX 102126
NPWLSX

URGENT - WEATHER MESSAGE
National Weather Service Saint Louis MO
326 PM CST Tue Nov 10 2020

ILZ058>060-095>097-MOZ018-019-026-027-102230-
/O.CAN.KLSX.WI.Y.0006.000000T0000Z-201111T0000Z/
Adams IL-Brown IL-Greene IL-Knox MO-Lewis MO-Macoupin IL-
Marion MO-Montgomery IL-Pike IL-Shelby MO-
Including the cities of Hannibal, Litchfield, Mount Sterling, 
Pittsfield, and Quincy
326 PM CST Tue Nov 10 2020

...WIND ADVISORY IS CANCELLED...

Winds are no longer expected to gust to 45 mph, so the advisory
has been cancelled.

$$

Elmore

The office that day

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

Issued	Product	Office	Counties	Lasted
Nov 10, 1:07 PM CST	Severe Thunderstorm Warning	LSX	Adams, Pike	53 min
Nov 10, 1:45 PM CST	Severe Thunderstorm Warning	LSX	Adams, Brown, Pike	60 min
Nov 10, 2:21 PM CST	Severe Thunderstorm Warning	LSX	Pike	39 min
Nov 10, 2:44 PM CST	Severe Thunderstorm Warning	LSX	Brown, Pike	13 min
Nov 10, 4:08 PM CST	Severe Thunderstorm Warning	LSX	Jersey, Macoupin, Madison	26 min
Nov 10, 11:03 AM CST	Severe Thunderstorm Warning	LSX	Knox	28 min
Nov 10, 11:55 AM CST	Severe Thunderstorm Warning	LSX	Audrain, Boone, Callaway, Monroe, Shelby	50 min
Nov 10, 11:59 AM CST	Severe Thunderstorm Warning	LSX	Boone, Callaway, Cole, Moniteau	46 min
Nov 10, 12:05 PM CST	Severe Thunderstorm Warning	LSX	Knox, Lewis, Shelby	25 min
Nov 10, 12:27 PM CST	Severe Thunderstorm Warning	LSX	Knox, Lewis, Shelby	25 min
Nov 10, 12:41 PM CST	Severe Thunderstorm Warning	LSX	Audrain, Boone, Callaway, Marion, Monroe, Shelby	49 min
Nov 10, 12:51 PM CST	Severe Thunderstorm Warning	LSX	Lewis, Marion	22 min
Nov 10, 12:55 PM CST	Severe Thunderstorm Warning	LSX	Audrain, Marion, Monroe, Ralls	50 min

Nearby

Wind Advisories in Illinois, 2020 Wind Advisories in Missouri, 2020 Every wind advisory in 2020

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.