Alert archive / Missouri / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 100, NWS St. Louis, MO

June 25, 2021Boone County, Moniteau County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Jun 25, 2021, 5:01 PM CDT for Boone County, Moniteau County, Missouri. It was in force for 44 min. 7 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jun 25, 2021, 5:01 PM CDT (22:01 UTC)
Expired: Jun 25, 2021, 5:45 PM CDT
In force: 44 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Boone County, MO, Moniteau County, MO

The radar

The St Louis radar (KLSX), 142 km from the middle of the area, began a volume at 22:01 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.

What was reported inside it

Time	Report	Where	Remark
Jun 25, 5:23 PM CDT	TSTM WND DMG	4 Ssw Columbia, MO	CORRECTS TIME OF PREVIOUS TSTM WND DMG REPORT FROM 4 SSW COLUMBIA. POWER LINES DOWN.
Jun 25, 5:28 PM CDT	TSTM WND DMG	3 Ssw Columbia, MO	POWER LINES DOWN.
Jun 25, 5:32 PM CDT	TSTM WND DMG	Columbia, MO	TREE DOWN AT THE INTERSECTION OF WASHINGTON AVE. AND DYSART ST.
Jun 25, 5:35 PM CDT	TSTM WND DMG	2 Ene Columbia, MO	TREE DOWN INTO A MOBILE HOME WITH STRUCTURAL DAMAGE.
Jun 25, 5:35 PM CDT	TSTM WND DMG	4 Ssw Columbia, MO	POWER LINES DOWN.
Jun 25, 5:37 PM CDT	TSTM WND DMG	3 E Columbia, MO	TREE FELL DOWN ON MOBILE HOME.
Jun 25, 5:40 PM CDT	TSTM WND DMG	3 Ne Columbia, MO	TREE DOWN BLOCKING EXIT RAMP.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 10.0 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-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: 1974 J/kg
Mixed-layer CIN: -49 J/kg
Mixed-layer LCL: 797 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 268 m²/s²
0-3 km storm-relative helicity: 248 m²/s²
Significant tornado parameter: 2.2
Supercell composite: 10.8

Open this sounding in Storm Lab

The text

As transmitted.

679 
WUUS53 KLSX 252201
SVRLSX
MOC019-135-252245-
/O.NEW.KLSX.SV.W.0100.210625T2201Z-210625T2245Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service St Louis MO
501 PM CDT Fri Jun 25 2021

The National Weather Service in St Louis has issued a

* Severe Thunderstorm Warning for...
  Boone County in central Missouri...
  Northeastern Moniteau County in central Missouri...

* Until 545 PM CDT.

* At 501 PM CDT, a severe thunderstorm was located over Easley,
  moving northeast at 20 mph.

  HAZARD...60 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* This severe thunderstorm will be near...
  Ashland around 505 PM CDT.
  Columbia Regional Airport around 515 PM CDT.

Other locations in the path of this severe thunderstorm include
Columbia and Murry.

This includes Interstate 70 in Missouri between exits 121 and 133.
 
This also includes Rock Bridge State Park, Finger Lakes State Park,
and Jewell Cemetery Historic Site.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3922 9238 3915 9211 3907 9211 3906 9213
      3897 9214 3870 9230 3871 9234 3873 9237
      3874 9239 3873 9240 3876 9252
TIME...MOT...LOC 2201Z 202DEG 18KT 3880 9238 

HAIL...1.00IN
WIND...60MPH
 
$$

Carney

1 follow-up statement

660 
WWUS53 KLSX 252221
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
521 PM CDT Fri Jun 25 2021

MOC135-252231-
/O.CAN.KLSX.SV.W.0100.000000T0000Z-210625T2245Z/
Moniteau MO-
521 PM CDT Fri Jun 25 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN MONITEAU COUNTY
IS CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 1100 PM CDT for
central Missouri.

LAT...LON 3922 9238 3915 9211 3907 9211 3906 9213
      3903 9214 3901 9213 3898 9214 3898 9215
      3896 9215 3877 9226 3881 9238 3882 9240
      3882 9243 3888 9248
TIME...MOT...LOC 2221Z 202DEG 18KT 3889 9233 

$$

MOC019-252245-
/O.CON.KLSX.SV.W.0100.000000T0000Z-210625T2245Z/
Boone MO-
521 PM CDT Fri Jun 25 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM CDT
FOR CENTRAL BOONE COUNTY...

At 521 PM CDT, a severe thunderstorm was located near Columbia,
moving north at 20 mph.

HAZARD...60 mph wind gusts and nickel size hail.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

Locations impacted include...
  Columbia, Hallsville and Murry.

This also includes Rock Bridge State Park, Finger Lakes State Park,
and Jewell Cemetery Historic Site.
 
This includes Interstate 70 in Missouri between exits 121 and 133.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3922 9238 3915 9211 3907 9211 3906 9213
      3903 9214 3901 9213 3898 9214 3898 9215
      3896 9215 3877 9226 3881 9238 3882 9240
      3882 9243 3888 9248
TIME...MOT...LOC 2221Z 202DEG 18KT 3889 9233 

HAIL...0.88IN
WIND...60MPH
 
$$

Carney

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 24, 10:57 PM CDT	Severe Thunderstorm Warning	LSX	Monroe, Shelby	48 min
Jun 24, 11:03 PM CDT	Tornado Warning	LSX	Monroe, Shelby	42 min
Jun 24, 11:29 PM CDT	Severe Thunderstorm Warning	LSX	Audrain, Lewis, Marion, Monroe, Pike, Ralls and 1 more	46 min
Jun 24, 11:32 PM CDT	Tornado Warning	LSX	Lewis	28 min
Jun 24, 11:35 PM CDT	Tornado Warning	LSX	Audrain, Monroe, Ralls	40 min
Jun 24, 11:40 PM CDT	Tornado Warning	LSX	Marion, Monroe, Ralls, Shelby	38 min
Jun 25, 12:09 AM CDT	Tornado Warning	LSX	Audrain, Pike, Ralls	51 min
Jun 25, 12:17 AM CDT	Severe Thunderstorm Warning	LSX	Audrain, Lincoln, Montgomery, Pike, Ralls	43 min
Jun 25, 12:57 AM CDT	Severe Thunderstorm Warning	LSX	Lincoln, Pike	48 min
Jun 25, 1:27 AM CDT	River Flood Warning	LSX	Boone	33 hr
Jun 25, 1:54 AM CDT	Areal Flood Advisory	LSX	Montgomery	3 hr
Jun 25, 2:21 AM CDT	Areal Flood Advisory	LSX	Audrain, Boone, Callaway	106 min
Jun 25, 3:07 AM CDT	Areal Flood Advisory	LSX	Boone, Callaway, Cole, Moniteau	82 min
Jun 25, 3:34 AM CDT	Flash Flood Warning	LSX	Boone	6 hr
Jun 25, 4:04 AM CDT	Flash Flood Warning	LSX	Audrain, Boone, Callaway	6 hr
Jun 25, 4:26 AM CDT	Flash Flood Warning	LSX	Boone, Callaway, Cole, Moniteau	6 hr
Jun 25, 4:28 AM CDT	Flash Flood Warning	LSX	Callaway, Lincoln, Montgomery, Osage, Warren	6 hr
Jun 25, 7:48 AM CDT	River Flood Warning	LSX	Lincoln	62 hr
Jun 25, 8:25 AM CDT	Areal Flood Warning	LSX	Audrain, Boone, Callaway, Cole, Moniteau	9 hr
Jun 25, 10:06 AM CDT	River Flood Warning	LSX	Franklin, Warren	9 days
Jun 25, 10:06 AM CDT	River Flood Warning	LSX	Saint Charles, Saint Louis	21 days
Jun 25, 10:06 AM CDT	River Flood Warning	LSX	Boone, Callaway, Cole, Moniteau	8 days
Jun 25, 10:06 AM CDT	River Flood Warning	LSX	Callaway, Osage	21 days
Jun 25, 10:06 AM CDT	River Flood Warning	LSX	Gasconade, Montgomery	10 days
Jun 25, 4:59 PM CDT	Severe Thunderstorm Warning	LSX	Callaway, Osage	20 min
Jun 25, 5:05 PM CDT	River Flood Warning	LSX	Cole, Osage	9 days
Jun 25, 5:42 PM CDT	Severe Thunderstorm Warning	LSX	Audrain, Boone, Callaway	22 min
Jun 25, 6:07 PM CDT	River Flood Warning	LSX	Lincoln	3 days
Jun 25, 6:36 PM CDT	Severe Thunderstorm Warning	LSX	Lincoln, Saint Charles, Warren	39 min
Jun 25, 6:43 PM CDT	Flash Flood Warning	LSX	Audrain, Boone, Callaway	6 hr
Jun 25, 6:48 PM CDT	Severe Thunderstorm Warning	LSX	Lincoln, Montgomery, Warren	42 min
Jun 25, 6:55 PM CDT	Severe Thunderstorm Warning	LSX	Audrain, Boone, Callaway	19 min

Nearby

Severe Thunderstorm Warnings in Missouri, 2021 Every severe thunderstorm warning 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.