Alert archive / Missouri / Red Flag Warnings in 2020

Red Flag Warning 3, NWS St. Louis, MO

October 14, 202018 counties in Missouri; 8 counties in Illinois

NWS St. Louis, MO issued this red flag warning at Oct 14, 2020, 4:01 AM CDT for 18 counties in Missouri; 8 counties in Illinois. It took effect at Oct 14, 2020, 1:00 PM CDT. It was in force for 5 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Oct 14, 2020, 4:01 AM CDT (09:01 UTC)
In effect from
Oct 14, 2020, 1:00 PM CDT
Expired
Oct 14, 2020, 6:00 PM CDT
In force
5 hr
Issued by
NWS St. Louis, MO
All 26 counties

Calhoun County, IL, Greene County, IL, Jersey County, IL, Macoupin County, IL, Madison County, IL, Monroe County, IL, Montgomery County, IL, Saint Clair County, IL, Audrain County, MO, Boone County, MO, Callaway County, MO, City of Saint Louis, MO, Cole County, MO, Crawford County, MO, Dent County, MO, Franklin County, MO, Gasconade County, MO, Jefferson County, MO, Lincoln County, MO, Moniteau County, MO, Montgomery County, MO, Osage County, MO, Saint Charles County, MO, Saint Louis County, MO, Warren County, MO, Washington County, MO

The radar

The St Louis radar (KLSX), 25 km from the middle of the area, began a volume at 09:02 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, 9.0 hours before the alert went out and 261 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, Lincoln, IL at 00:00Z on 2020-10-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lincoln, IL at 00:00Z on 2020-10-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 75 square meters per square second.1939587897117Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2831 m above ground
0-6 km bulk shear
60 kt
0-1 km storm-relative helicity
75 m²/s²
0-3 km storm-relative helicity
88 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

064 
WWUS83 KLSX 140901
RFWLSX

URGENT - FIRE WEATHER MESSAGE
National Weather Service Saint Louis MO
401 AM CDT Wed Oct 14 2020

ILZ064-065-095>097-MOZ027-034>036-141015-
/O.CAN.KLSX.FW.A.0002.201014T1700Z-201014T2300Z/
Adams IL-Bond IL-Brown IL-Fayette IL-Marion MO-Monroe MO-Pike IL-
Pike MO-Ralls MO-
401 AM CDT Wed Oct 14 2020

...FIRE WEATHER WATCH IS CANCELLED FOR WIND AND LOW RELATIVE
HUMIDITY FOR PARTS OF NORTHEAST MISSOURI AND WEST CENTRAL ILLINOIS...

The National Weather Service in Saint Louis has cancelled the
Fire Weather Watch.

Relative humidity levels are not expected to fall below 25 percent
this afternoon, therefore red flag conditions will not be met.
However, minimum relative humidity of 25 to 30 percent is likely,
along with sustained winds higher than 15 mph and dry fuels. This
will produce heightened fire danger for the area.

$$

ILZ058>060-098>102-MOZ041-042-047>052-059>065-072-073-083-142300-
/O.UPG.KLSX.FW.A.0002.201014T1700Z-201014T2300Z/
/O.NEW.KLSX.FW.W.0003.201014T1800Z-201014T2300Z/
Audrain MO-Boone MO-Calhoun IL-Callaway MO-Cole MO-Crawford MO-
Dent MO-Franklin MO-Gasconade MO-Greene IL-Jefferson MO-Jersey IL-
Lincoln MO-Macoupin IL-Madison IL-Moniteau MO-Monroe IL-
Montgomery IL-Montgomery MO-Osage MO-Saint Charles MO-
Saint Clair IL-Saint Louis City MO-Saint Louis MO-Warren MO-
Washington MO-
401 AM CDT Wed Oct 14 2020

...RED FLAG WARNING IN EFFECT FROM 1 PM THIS AFTERNOON TO 6 PM
CDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR PARTS OF
CENTRAL AND EASTERN MISSOURI AS WELL AS SOUTHWEST AND SOUTH
CENTRAL ILLINOIS...

The National Weather Service in Saint Louis has issued a Red Flag
Warning for wind and low relative humidity, which is in effect
from 1 PM this afternoon to 6 PM CDT this evening. The Fire
Weather Watch is no longer in effect.

* AFFECTED AREA...In Illinois, Fire Weather Zones 058, 059, 060, 
  098, 099, 100, 101 and 102. In Missouri, Fire Weather Zones 
  041, 042, 047, 048, 049, 050, 051, 052, 059, 060, 061, 062, 
  063, 064, 065, 072, 073 and 083.

* 20 FOOT WINDS...Southwest 15 to 25 mph with gusts up to 40 mph.

* RELATIVE HUMIDITY...As low as 21 percent.

* 10 HOUR FUELS...Less than 9 percent.

* IMPACTS...These conditions are conducive for the rapid spread 
  and growth of uncontrolled wildfires.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
are either occurring now, or will shortly. A combination of
strong winds, low relative humidity, and dry fuels can contribute
to extreme fire behavior.

&&

$$

Carney
2 follow-up statements
686 
WWUS83 KLSX 141936
RFWLSX

URGENT - FIRE WEATHER MESSAGE
National Weather Service Saint Louis MO
236 PM CDT Wed Oct 14 2020

ILZ058>060-098>102-MOZ041-042-047>052-059>065-072-073-083-142300-
/O.CON.KLSX.FW.W.0003.000000T0000Z-201014T2300Z/
Audrain MO-Boone MO-Calhoun IL-Callaway MO-Cole MO-Crawford MO-
Dent MO-Franklin MO-Gasconade MO-Greene IL-Jefferson MO-Jersey IL-
Lincoln MO-Macoupin IL-Madison IL-Moniteau MO-Monroe IL-
Montgomery IL-Montgomery MO-Osage MO-Saint Charles MO-
Saint Clair IL-Saint Louis City MO-Saint Louis MO-Warren MO-
Washington MO-
236 PM CDT Wed Oct 14 2020

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 6 PM CDT THIS EVENING
FOR WIND AND LOW RELATIVE HUMIDITY FOR PARTS OF CENTRAL AND 
EASTERN MISSOURI AS WELL AS SOUTHWEST AND SOUTH CENTRAL ILLINOIS

* AFFECTED AREA...In Illinois, Fire Weather Zones 058, 059, 060, 
  098, 099, 100, 101 and 102. In Missouri, Fire Weather Zones 
  041, 042, 047, 048, 049, 050, 051, 052, 059, 060, 061, 062, 
  063, 064, 065, 072, 073 and 083.

* 20 FOOT WINDS...Southwest 15 to 25 mph with gusts up to 40 mph.

* RELATIVE HUMIDITY...As low as 15 to 20 percent.

* 10 HOUR FUELS...Less than 9 percent.

* IMPACTS...These conditions are conducive for the rapid spread 
  and growth of uncontrolled wildfires.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
are either occurring now, or will shortly. A combination of
strong winds, low relative humidity, and dry fuels can contribute
to extreme fire behavior.

&&

$$

Glass
927 
WWUS83 KLSX 142300
RFWLSX

URGENT - FIRE WEATHER MESSAGE
National Weather Service Saint Louis MO
600 PM CDT Wed Oct 14 2020

ILZ058>060-098>102-MOZ041-042-047>052-059>065-072-073-083-150000-
/O.EXP.KLSX.FW.W.0003.000000T0000Z-201014T2300Z/
Audrain MO-Boone MO-Calhoun IL-Callaway MO-Cole MO-Crawford MO-
Dent MO-Franklin MO-Gasconade MO-Greene IL-Jefferson MO-Jersey IL-
Lincoln MO-Macoupin IL-Madison IL-Moniteau MO-Monroe IL-
Montgomery IL-Montgomery MO-Osage MO-Saint Charles MO-
Saint Clair IL-Saint Louis City MO-Saint Louis MO-Warren MO-
Washington MO-
600 PM CDT Wed Oct 14 2020

...RED FLAG WARNING WILL EXPIRE AT 6 PM CDT THIS EVENING FOR WIND
AND LOW RELATIVE HUMIDITY FOR PARTS OF WEST CENTRAL ILLINOIS AND 
EASTERN/CENTRAL MISSOURI...

Wind speeds are expected to diminish quickly this evening, and
relative humidity will quickly recover as temperatures drop. As
such, conditions are expected to improve quickly during the 
evening hours. 

$$

19

Nearby

Red Flag Warnings in Missouri, 2020Red Flag Warnings in Illinois, 2020Every red flag warning 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.