Alert archive / Missouri / Severe Thunderstorm Warnings in 2026
Severe Thunderstorm Warning 210, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Jul 9, 2026, 7:48 PM CDT for Osage County, Missouri. It was in force for 42 min. 1 report 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
- Jul 9, 2026, 7:48 PM CDT (00:48 UTC)
- Expired
- Jul 9, 2026, 8:30 PM CDT
- In force
- 42 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 50.0 mph
County Osage County, MO
The radar
The St Louis radar (KLSX), 108 km from the middle of the area, began a volume at 00:51 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 9, 7:55 PM CDT | HAIL 1 | 2 Sse Loose Creek, MO | 40 mph wind with quarter sized hail. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
Did it verify
Verified. The Iowa Environmental Mesonet's Cow matched one storm report to this severe thunderstorm warning; the first came 7 minutes after it went out.
Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.
The nearest sounding before it
Springfield, MO (KSGF), launched 00:00Z, 0.8 hours before the alert went out and 243 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
- 2398 J/kg
- Mixed-layer CIN
- -6 J/kg
- Mixed-layer LCL
- 1200 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 102 m²/s²
- 0-3 km storm-relative helicity
- 238 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 9.5
The text
As transmitted.
435
WUUS53 KLSX 100048
SVRLSX
MOC151-100130-
/O.NEW.KLSX.SV.W.0210.260710T0048Z-260710T0130Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service St Louis MO
748 PM CDT Thu Jul 9 2026
The National Weather Service in St Louis has issued a
* Severe Thunderstorm Warning for...
Southeastern Osage County in central Missouri...
* Until 830 PM CDT.
* At 748 PM CDT, a severe thunderstorm was located 5 miles northeast
of Westphalia, or 5 miles west of Linn, moving east at 20 mph.
HAZARD...Quarter size hail.
SOURCE...Radar indicated.
IMPACT...Damage to vehicles is expected.
* Locations impacted include...
Westphalia, Bonnots Mill, Loose Creek, Linn and Rich Fountain.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Seek shelter inside a well-built structure and stay away from
windows. This storm is capable of producing large hail.
Torrential rainfall is also occurring with this storm and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3845 9204 3847 9203 3849 9201 3851 9201
3858 9198 3855 9164 3852 9164 3831 9166
TIME...MOT...LOC 0048Z 281DEG 18KT 3850 9194
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...<50 MPH
$$
LE3 follow-up statements
538
WWUS53 KLSX 100100
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
800 PM CDT Thu Jul 9 2026
MOC151-100130-
/O.CON.KLSX.SV.W.0210.000000T0000Z-260710T0130Z/
Osage MO-
800 PM CDT Thu Jul 9 2026
...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 830 PM CDT FOR
SOUTHEASTERN OSAGE COUNTY...
At 800 PM CDT, a severe thunderstorm was located over Linn, moving
east at 20 mph.
HAZARD...Quarter size hail.
SOURCE...At 755 PM, one inch hail was reported 5 miles west of Linn
by a trained spotter.
IMPACT...Damage to vehicles is expected.
Locations impacted include...
Westphalia, Bonnots Mill, Loose Creek, Linn and Rich Fountain.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Seek shelter inside a well-built structure and stay away from
windows. This storm has produced large hail.
Torrential rainfall is also occurring with this storm and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3845 9204 3847 9203 3849 9201 3851 9201
3858 9198 3855 9164 3852 9164 3831 9166
TIME...MOT...LOC 0048Z 281DEG 18KT 3850 9194
HAIL THREAT...OBSERVED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...<50 MPH
$$
LE305
WWUS53 KLSX 100111
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
811 PM CDT Thu Jul 9 2026
MOC151-100130-
/O.CON.KLSX.SV.W.0210.000000T0000Z-260710T0130Z/
Osage MO-
811 PM CDT Thu Jul 9 2026
...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 830 PM CDT FOR
SOUTHEASTERN OSAGE COUNTY...
At 811 PM CDT, a severe thunderstorm was located over Linn, moving
east at 20 mph.
HAZARD...Quarter size hail.
SOURCE...Trained spotters reported one inch hail was reported 5 miles
west of Linn at 755 PM.
IMPACT...Damage to vehicles is expected.
Locations impacted include...
Frankenstein, Linn and Rich Fountain.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Seek shelter inside a well-built structure and stay away from
windows. This storm has produced large hail.
Torrential rainfall is also occurring with this storm and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3841 9193 3851 9194 3858 9193 3855 9164
3849 9164 3831 9166
TIME...MOT...LOC 0100Z 281DEG 18KT 3849 9186
HAIL THREAT...OBSERVED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...<50 MPH
$$
LE926
WWUS53 KLSX 100127
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
827 PM CDT Thu Jul 9 2026
MOC151-100137-
/O.EXP.KLSX.SV.W.0210.000000T0000Z-260710T0130Z/
Osage MO-
827 PM CDT Thu Jul 9 2026
...SEVERE THUNDERSTORM WARNING WILL EXPIRE AT 830 PM CDT FOR
SOUTHEASTERN OSAGE COUNTY...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire. However, small hail
and heavy rain are still possible with this thunderstorm.
&&
LAT...LON 3841 9193 3851 9194 3858 9193 3855 9164
3849 9164 3831 9166
TIME...MOT...LOC 0111Z 281DEG 18KT 3848 9179
$$
LEWhat forecasters said that day
The local office's own words before this severe thunderstorm warning 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 severe thunderstorm warning went out at Jul 9, 6:21 PM CDT, 1 hour 27 minutes earlier. Its key messages:
- A flash flood watch is in effect through Friday night in southeast Missouri and southwest Illinois, with multiple rounds of showers and thunderstorms expected.
- Some storms this evening and again Friday afternoon/evening may be strong to severe with damaging winds the primary threat each day.
- Dry weather along with above normal temperatures are forecast Sunday through the middle of next week.
Area forecast discussion, Jul 9, 6:21 PM CDT, 1 hour 27 minutes before
Area Forecast Discussion
National Weather Service St Louis MO
621 PM CDT Thu Jul 9 2026
.KEY MESSAGES...
- A flash flood watch is in effect through Friday night in
southeast Missouri and southwest Illinois, with multiple
rounds of showers and thunderstorms expected.
- Some storms this evening and again Friday afternoon/evening
may be strong to severe with damaging winds the primary
threat each day.
- Dry weather along with above normal temperatures are forecast
Sunday through the middle of next week.
&&
.SHORT TERM /THROUGH FRIDAY NIGHT/...
Issued at 237 PM CDT Thu Jul 9 2026
GOES-19 visible satellite imagery shows 3, maybe 4 MCVs across
the region all moving eastward. One is near K3LF and the other
near KUIN. Both of these features has recently led to convective
initiation just east/southeast of each of these in west central
and south-central Illinois. One or two of these storms may be
on the stronger side with damaging winds the primary threat.
More convective development is expected by early this evening as
the low-level jet strengthens. Moisture convergence associated
with the low-level jet will also increase, and this combined
with an uptick in midlevel ascent downstream of the upstream
MCVs (one near OK-KS border and another possible MCV near KSTJ)
should lead to more widespread showers and thunderstorms. This
activity is expected to focus mainly across southeast Missouri.
Concern for flash flooding is increasing, as training is
expected through the early overnight hours in an environment
that is supportive of high rainfall rates (deep warm cloud
depths, anomalous precipitable water values). New cells should
develop on the west/northwest flank of the activity through the
early overnight hours as the low-level jet veers from the
southwest to the west. Past events with these setups tend to
have a narrow west/northwest to east/southeast axis of very
heavy rainfall on the west/southwest edge of the precipitation
shield. That may indeed occur again tonight, and if so, may
heavily impact a portion of a few counties in southeast
Missouri. The LPMM of the HREF has a narrow axis of 3-4" whereas
the REFS has almost double those totals. If training occurs
long enough, I would not rule out the higher-end potential of
the REFS LPMM. Due to this threat for significant rainfall
amounts and flash flood potential, a flash flood watch is now in
effect beginning this afternoon through Friday night across
southeast Missouri and a small part of southwest Illinois.
The heavy rain threat overnight tonight should end around dawn with
the stronger low-level moisture convergence shifting to the
east/southeast more toward the lower Ohio Valley. Mostly dry
conditions are then forecast through the remainder of the morning
hours across the area. Attention will then look to the west again.
Another MCV(s?) is likely to be moving across eastern Kansas by
midday. The exact track/timing of this feature is not certain,
nor is the environment ahead of it due to the morning showers
and thunderstorms. The effective front may be to our south,
though at least some sunshine should allow for instability to
climb ahead of the approaching MCV. Scattered showers and
thunderstorms are forecast across the area, though there may be
a bit more focus from central-southeast Missouri during the late
afternoon/evening time frame. Similar to today, damaging winds
should be the primary threat. Locally heavy rainfall will also
be possible as there will be little/no change in the environment
so efficient warm rain processes are expected. Areas that get
hit hardest tonight would be the main concern as soils may be
very saturated and any additional (even brief) heavy rainfall
could cause renewed hydrological issues.
The low-level jet increases again Friday night, though it does not
look as strong as tonight. Therefore, I think there will be another
uptick in the coverage of showers and thunderstorms, but the overall
threat for flash flooding likely will stay mostly confined to areas
that are hardest hit tonight as alluded to in the paragraph above.
&&
.LONG TERM /SATURDAY THROUGH THURSDAY/...
Issued at 237 PM CDT Thu Jul 9 2026
(Saturday - Saturday Night)
Uncertainty on Saturday increases, in part due to the 2-3 rounds of
showers and thunderstorms anticipated before this time period.
Deterministic guidance though does show a midlevel shortwave trough
moving south/southwest almost beneath the amplifying mid/upper level
ridge to the west. Showers and thunderstorms are again possible
Saturday/Saturday night, mainly across southeast
Missouri/southwest Illinois, which should be closer to the
effective frontal boundary. If confidence increases in the
threat for showers and thunderstorms on Saturday, the existing
flash flood watch may need to be extended in time.
(Sunday - Next Thursday)
Not a lot has changed over the past 24 hours, with a historic record-
breaking mid/upper level ridge expected across the northern
Plains/Upper Midwest. Our area will be within deep northeasterly
flow aloft, so dry weather is expected. The low-level thermal ridge
is also forecast to stay well to our north, so 850-hPa temperatures
are actually pretty close normal (+16 to +20C). Nighttime lows are
forecast to be near seasonal averages, with daytime highs likely a
bit above normal due to plenty of sunshine expected each day.
Relative humidity (dewpoint) values also should tick down early next
week, aided by continued deep northeasterly flow. This means heat
index values should not be too much higher than the ambient air
temperature, and the chances of heat advisory duration criteria
(100+ for 4+ days) seem very small attm.
&&
.AVIATION /00Z TAFS THROUGH 06Z SATURDAY/...
Issued at 618 PM CDT Thu Jul 9 2026
The main concern will be scattered showers and thunderstorms
developing at various times through the upcoming period.
However, confidence in these affecting any one TAF site is
fairly low. This evening's thunderstorms are likely to occur
south of the St Louis metro, but may impact parts of central
Missouri with JEF the most likely to be impacted. Otherwise we
expect primarily mid level cloud decks well within the VFR
range. Additional thunderstorms are possible tomorrow afternoon
area wide, but confidence remains low on where or when.
&&
.LSX WATCHES/WARNINGS/ADVISORIES...
MO...Flood Watch through Saturday morning for MOZ072>075-084-085-
099.
IL...Flood Watch through Saturday morning for ILZ079.
&&
SHORT TERM...Gosselin
LONG TERM...Gosselin
AVIATION...KimbleIn the hours before
Local storm report, Jul 9, 6:43 PM CDT, 1 hour 5 minutes before
Preliminary Local Storm Report
National Weather Service St Louis MO
643 PM CDT Thu Jul 9 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0301 PM Tstm Wnd Dmg 1 SSW Witt 39.25N 89.35W
07/09/2026 Montgomery IL Emergency Mngr
16 in diameter tree snapped.
&&
PfahlerLocal storm report, Jul 9, 6:45 PM CDT, 1 hour 3 minutes before
Preliminary Local Storm Report
National Weather Service St Louis MO
645 PM CDT Thu Jul 9 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0303 PM Tstm Wnd Dmg 2 ESE Witt 39.24N 89.31W
07/09/2026 Montgomery IL Emergency Mngr
Large tree blown down.
&&
PfahlerLocal storm report, Jul 9, 6:49 PM CDT, 59 minutes before
Preliminary Local Storm Report
National Weather Service St Louis MO
649 PM CDT Thu Jul 9 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0255 PM Tstm Wnd Dmg 3 SSE Witt 39.21N 89.33W
07/09/2026 Montgomery IL Emergency Mngr
West wall of a pole barn pulled away from
structure.
&&
PfahlerThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 9, 7:39 PM CDT | Severe Thunderstorm Warning | LSX | Cole, Moniteau | 42 min |
| Jul 9, 10:58 PM CDT | Areal Flood Advisory | LSX | Saint Francois | 3 hr |
| Jul 9, 11:11 PM CDT | Areal Flood Advisory | LSX | Reynolds | 36 min |
| Jul 9, 11:47 PM CDT | Flash Flood Warning | LSX | Iron, Reynolds | 6 hr |
| Jul 10, 12:15 AM CDT | Areal Flood Advisory | LSX | Iron | 92 min |
| Jul 10, 12:52 AM CDT | Flash Flood Warning | LSX | Iron | 5 hr |
| Jul 10, 1:04 AM CDT | Areal Flood Advisory | LSX | Crawford | 86 min |
| Jul 10, 1:41 AM CDT | Areal Flood Warning | LSX | Saint Francois | 6 hr |
| Jul 10, 1:47 AM CDT | Flash Flood Warning | LSX | Iron | 5 hr |
| Jul 10, 1:50 AM CDT | Areal Flood Advisory | LSX | Madison | 21 min |
| Jul 10, 2:00 AM CDT | River Flood Warning | LSX | Reynolds | 41 hr |
| Jul 10, 2:11 AM CDT | Flash Flood Warning | LSX | Madison | 17 hr |
| Jul 10, 2:30 AM CDT | Flash Flood Warning | LSX | Crawford | 15 hr |
| Jul 10, 4:16 AM CDT | Flash Flood Warning | LSX | Iron, Reynolds | 16 hr |
| Jul 10, 5:15 AM CDT | Flash Flood Warning | LSX | Washington | 11 hr |
| Jul 10, 10:04 AM CDT | Flash Flood Warning | LSX | Madison, Saint Francois, Washington | 3 hr |
| Jul 10, 10:06 AM CDT | Flash Flood Warning | LSX | Iron | 9 hr |
| Jul 10, 11:35 AM CDT | River Flood Warning | LSX | Crawford | 26 hr |
| Jul 10, 11:35 AM CDT | River Flood Warning | LSX | Crawford, Washington | 44 hr |
| Jul 10, 12:52 PM CDT | Areal Flood Warning | LSX | Iron, Madison, Sainte Genevieve, Saint Francois, Washington | 3 hr |
| Jul 10, 3:51 PM CDT | Flash Flood Warning | LSX | Washington | 107 min |
| Jul 10, 4:24 PM CDT | River Flood Warning | LSX | Osage | 17 hr |
| Jul 10, 5:25 PM CDT | Areal Flood Warning | LSX | Crawford, Iron | 20 hr |
| Jul 10, 5:38 PM CDT | Areal Flood Warning | LSX | Crawford, Iron, Washington | 19 hr |
| Jul 10, 5:58 PM CDT | Severe Thunderstorm Warning | LSX | Boone, Moniteau | 47 min |
| Jul 10, 6:31 PM CDT | Severe Thunderstorm Warning | LSX | Audrain, Callaway | 52 min |
Nearby
Severe Thunderstorm Warnings in Missouri, 2026Every severe thunderstorm warning in 2026
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.