Alert archive / Illinois / Wind Advisories in 2021
Wind Advisory 2, NWS St. Louis, MO
NWS St. Louis, MO issued this wind advisory at Mar 18, 2021, 2:49 AM CDT for 8 counties in Illinois; 4 counties in Missouri. It took effect at Mar 18, 2021, 7:00 AM CDT. It was in force for 12 hr.
The area
The counties it named.
The facts
- Issued
- Mar 18, 2021, 2:49 AM CDT (07:49 UTC)
- In effect from
- Mar 18, 2021, 7:00 AM CDT
- Expired
- Mar 18, 2021, 6:37 PM CDT
- In force
- 12 hr
- Issued by
- NWS St. Louis, MO
Counties Adams County, IL, Brown County, IL, Calhoun County, IL, Greene County, IL, Jersey 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), 105 km from the middle of the area, began a volume at 07:50 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, 7.8 hours before the alert went out and 208 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 441 m above ground
- 0-6 km bulk shear
- 50 kt
- 0-1 km storm-relative helicity
- 503 m²/s²
- 0-3 km storm-relative helicity
- 446 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
438 WWUS73 KLSX 180749 NPWLSX URGENT - WEATHER MESSAGE National Weather Service Saint Louis MO 249 AM CDT Thu Mar 18 2021 ILZ058>060-095>099-MOZ018-019-026-027-182000- /O.NEW.KLSX.WI.Y.0002.210318T1200Z-210319T0000Z/ Adams IL-Brown IL-Calhoun IL-Greene IL-Jersey 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 249 AM CDT Thu Mar 18 2021 ...WIND ADVISORY IN EFFECT FROM 7 AM THIS MORNING TO 7 PM CDT THIS EVENING... * WHAT...North winds 20 to 25 mph with gusts up to 40 mph expected. * WHERE...Portions of northeast Missouri as well as south-central and west-central Illinois. * WHEN...From 7 AM this morning to 7 PM CDT this evening. * 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. && $$ Pfahler
3 follow-up statements
115 WWUS73 KLSX 180753 CCA NPWLSX URGENT - WEATHER MESSAGE...CORRECTED National Weather Service Saint Louis MO 253 AM CDT Thu Mar 18 2021 ILZ058>060-095>099-MOZ018-019-026-027-182000- /O.COR.KLSX.WI.Y.0002.210318T1200Z-210319T0000Z/ Adams IL-Brown IL-Calhoun IL-Greene IL-Jersey IL-Knox MO-Lewis MO- Macoupin IL-Marion MO-Montgomery IL-Pike IL-Shelby MO- Including the cities of Hannibal, Litchfield, Mount Sterling, Pittsfield, and Quincy 253 AM CDT Thu Mar 18 2021 ...WIND ADVISORY IN EFFECT FROM 7 AM THIS MORNING TO 7 PM CDT THIS EVENING... * WHAT...North winds 20 to 25 mph with gusts of 40 to 45 mph expected. * WHERE...Portions of northeast Missouri as well as south-central and west-central Illinois. * WHEN...From 7 AM this morning to 7 PM CDT this evening. * IMPACTS...Gusty winds could blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use extra caution when driving, especially if operating a high profile vehicle. Secure outdoor objects. && $$ Pfahler
033 WWUS73 KLSX 181850 NPWLSX URGENT - WEATHER MESSAGE National Weather Service Saint Louis MO 150 PM CDT Thu Mar 18 2021 ILZ058>060-095>099-MOZ018-019-026-027-190000- /O.CON.KLSX.WI.Y.0002.000000T0000Z-210319T0000Z/ Adams IL-Brown IL-Calhoun IL-Greene IL-Jersey 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 150 PM CDT Thu Mar 18 2021 ...WIND ADVISORY REMAINS IN EFFECT UNTIL 7 PM CDT THIS EVENING... * WHAT...North winds 20 to 25 mph with gusts up to 45 mph. * WHERE...Portions of northeast Missouri and south central, southwest and west central Illinois. * WHEN...Until 7 PM CDT this evening. * 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. && $$ Britt
141 WWUS73 KLSX 182337 NPWLSX URGENT - WEATHER MESSAGE National Weather Service Saint Louis MO 637 PM CDT Thu Mar 18 2021 ILZ058>060-095>099-MOZ018-019-026-027-190045- /O.CAN.KLSX.WI.Y.0002.000000T0000Z-210319T0000Z/ Adams IL-Brown IL-Calhoun IL-Greene IL-Jersey IL-Knox MO-Lewis MO- Macoupin IL-Marion MO-Montgomery IL-Pike IL-Shelby MO- Including the cities of Hannibal, Litchfield, Mount Sterling, Pittsfield, and Quincy 637 PM CDT Thu Mar 18 2021 ...WIND ADVISORY IS CANCELLED... Gusty winds will continues to subside through this evening and into the overnight hours. The threat for gusts prompting the advisory has ended. Therefore, the advisory has been cancelled. $$ Maples
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 17, 9:18 PM CDT | River Flood Warning | LSX | Fayette | 5 days |
| Mar 17, 9:35 PM CDT | River Flood Warning | LSX | Pike | 4 days |
| Mar 17, 9:35 PM CDT | River Flood Warning | LSX | Pike | 66 hr |
| Mar 17, 9:35 PM CDT | River Flood Warning | LSX | Calhoun | 4 days |
| Mar 17, 9:35 PM CDT | River Flood Warning | LSX | Jackson, Randolph | 8 days |
| Mar 17, 9:35 PM CDT | River Flood Warning | LSX | Madison | 21 days |
| Mar 17, 9:35 PM CDT | River Flood Warning | LSX | Saint Clair | 4 days |
| Mar 17, 9:35 PM CDT | River Flood Warning | LSX | Jersey | 21 days |
| Mar 18, 6:27 AM CDT | River Flood Warning | LSX | Brown | 6 days |
| Mar 18, 11:53 AM CDT | River Flood Warning | LSX | Calhoun | 3 days |
| Mar 18, 12:15 PM CDT | River Flood Warning | LSX | Pike | 34 hr |
| Mar 18, 3:15 PM CDT | River Flood Warning | LSX | Calhoun, Greene, Jersey | 5 days |
| Mar 18, 3:15 PM CDT | River Flood Warning | LSX | Pike, Scott | 21 days |
| Mar 17, 8:33 PM CDT | River Flood Warning | LSX | Cole | 55 hr |
| Mar 17, 8:34 PM CDT | River Flood Warning | LSX | Osage | 14 hr |
| Mar 17, 8:54 PM CDT | River Flood Warning | LSX | Lincoln | 42 hr |
| Mar 17, 9:04 PM CDT | River Flood Warning | LSX | Cole, Osage | 72 hr |
| Mar 17, 9:29 PM CDT | River Flood Warning | LSX | Reynolds | 41 hr |
| Mar 18, 9:41 AM CDT | River Flood Warning | LSX | Lincoln | 58 hr |
| Mar 18, 10:03 AM CDT | River Flood Warning | LSX | Saint Charles | 33 hr |
| Mar 18, 10:12 AM CDT | River Flood Warning | LSX | Jefferson, Saint Louis | 21 days |
| Mar 18, 4:11 PM CDT | River Flood Warning | LSX | Jefferson | 42 hr |
Nearby
Wind Advisories in Illinois, 2021Wind Advisories in Missouri, 2021Every wind advisory in 2021
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.