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Archive: Sunday, September 27, 2026.

Plain versions of the NWS discussions issued that day. wxexplained wasn't running yet: they were written later (Fri Nov 6) from the NWS text, the same way and with the same checks. This is not the current forecast. Today's forecast

Alerts

Out that day

Not recorded: wxexplained began keeping NWS alerts on November 6, 2026. See the NWS discussion below for the watches and warnings it listed.

3 versions of the page that day, oldest first.

From the discussion of 2:41 p.m. Sat Sep 26, current when the day began

Scattered showers and weak storms into Sunday morning, then drying Sunday. Rounds of heavy rain may bring a rising flood threat Tuesday through at least Friday.

From the NWS discussion issued 2:41 p.m. Sat Sep 26.

The forecast

  • Saturday afternoon (Portions of far eastern Kansas and western/northwest Missouri for more showers; areas roughly east of US-65 seeing some sun): More showers and weak storms may develop than first expected across portions of far eastern Kansas and western/northwest Missouri. Roughly east of US-65, some sunshine is peeking through. Nothing significant beyond a possible rumble of thunder and brief heavy rain.
  • Saturday night (Whole area, best chances south of Highway 36): Scattered showers and thunderstorms should pop up again overnight. The best chances are south of Highway 36.
  • Sunday: Showers and occasional storms linger into Sunday morning, then it dries out through the day.
  • Tuesday and Wednesday (Whole area, best potential in the northwest half): A wet stretch is expected to begin, with rounds of heavy rain possible. The best potential is over roughly the northwest half of the area.
  • Through at least Friday (Whole area, best potential in the northwest half): Wet conditions continue through at least Friday. Model groups show a broad area of 2-4+ inches of rain through mid-late week; some individual model runs, including the GFS, show swaths/pockets of 6-8+ inches.

How sure forecasters were

Forecasters have high confidence in the big-picture weather pattern through at least midweek, possibly all week. But there is a good degree of uncertainty in the details, and where the heaviest rain falls remains uncertain.

Read the NWS wording
showers and weak thunderstorm activity may end up being more prevalent than initially thought across portions of far eastern Kansas and into western/northwest Missouri
NWS Kansas City/Pleasant Hill, Area Forecast Discussion, 2:41 p.m. Sat Sep 26
areas roughly east of US-65 are even enjoying some sunshine
NWS Kansas City/Pleasant Hill, Area Forecast Discussion, 2:41 p.m. Sat Sep 26
Nothing of significance aside from a rumble of thunder possible and brief heavy rain.
NWS Kansas City/Pleasant Hill, Area Forecast Discussion, 2:41 p.m. Sat Sep 26
should again blossom at least scattered shower/thundershower activity into the area
NWS Kansas City/Pleasant Hill, Area Forecast Discussion, 2:41 p.m. Sat Sep 26
chances overnight tend to be best south of Highway 36
NWS Kansas City/Pleasant Hill, Area Forecast Discussion, 2:41 p.m. Sat Sep 26
- Showers and occasional general thunderstorm chances continue into Sunday morning.
NWS Kansas City/Pleasant Hill, Area Forecast Discussion, 2:41 p.m. Sat Sep 26
drying conditions out through the day
NWS Kansas City/Pleasant Hill, Area Forecast Discussion, 2:41 p.m. Sat Sep 26
- Increasing confidence in a period of wet conditions from Tuesday through at least Friday.
NWS Kansas City/Pleasant Hill, Area Forecast Discussion, 2:41 p.m. Sat Sep 26
For the immediate area, this potential tends to reside at Days 4/5 (Tuesday/Wednesday) and beyond.
NWS Kansas City/Pleasant Hill, Area Forecast Discussion, 2:41 p.m. Sat Sep 26
Lastly, the current best potential tends to reside over the NW half of the CWA or so, especially as you consider those areas have the most saturated soils as well (via NASA SPoRT).
NWS Kansas City/Pleasant Hill, Area Forecast Discussion, 2:41 p.m. Sat Sep 26
For added confidence in the potential, GFS/Euro ensembles (as well as their AI versions) highlight and expansive/broad area of 2-4+ inch QPF through mid-late week, which is impressive when you consider the washed out nature of ensemble QPF.
NWS Kansas City/Pleasant Hill, Area Forecast Discussion, 2:41 p.m. Sat Sep 26
The potential is further highlighted by deterministic solutions, including the 12z [7 AM CDT] GFS, depicting PWats climbing toward and above 2 inches (highly anomalous this time of the year) and swaths/pockets 6-8+ inches QPF.
NWS Kansas City/Pleasant Hill, Area Forecast Discussion, 2:41 p.m. Sat Sep 26
At this point in time, there is high confidence in the broad scale pattern evolution through at least mid-week, if not the entire work-week.
NWS Kansas City/Pleasant Hill, Area Forecast Discussion, 2:41 p.m. Sat Sep 26
But given the time horizon, there is a good degree of uncertainty in the finer details, such as the exact track of the mid-level cut-off low, its associated surface low, and frontal positions so will stress that locations of peak amounts remain uncertain.
NWS Kansas City/Pleasant Hill, Area Forecast Discussion, 2:41 p.m. Sat Sep 26

What to watch

Heavy rain and flooding (river and areal flooding)

Tuesday through at least Friday (Whole area, best potential in the northwest half)

Rounds of heavy rain may bring an increasing threat of river and areal flooding. A Slight Risk of excessive rainfall (heavy rain that could cause flooding) is out for Tuesday and Wednesday, likely to be raised. Soils are wettest in the northwest half.

Read the NWS wording
Rounds of heavy rain may yield an increasing river and areal flooding threat through the week.
NWS Kansas City/Pleasant Hill, Area Forecast Discussion, 2:41 p.m. Sat Sep 26
After an expansive (geographically) coordination call with WPC today, broad Slight Risks exist on Days 4/5 for the WPC Excessive Rainfall Outlook product, with likely upgrades as finer details come into better focus.
NWS Kansas City/Pleasant Hill, Area Forecast Discussion, 2:41 p.m. Sat Sep 26
Lastly, the current best potential tends to reside over the NW half of the CWA or so, especially as you consider those areas have the most saturated soils as well (via NASA SPoRT).
NWS Kansas City/Pleasant Hill, Area Forecast Discussion, 2:41 p.m. Sat Sep 26

Why the forecast might change

  • The exact path of the storm system, its surface low, and where fronts set up are still uncertain, which will decide where the heaviest rain falls.
  • The excessive rainfall risk for Tuesday and Wednesday will likely be upgraded as details become clearer.
Read the NWS wording
But given the time horizon, there is a good degree of uncertainty in the finer details, such as the exact track of the mid-level cut-off low, its associated surface low, and frontal positions so will stress that locations of peak amounts remain uncertain.
NWS Kansas City/Pleasant Hill, Area Forecast Discussion, 2:41 p.m. Sat Sep 26
After an expansive (geographically) coordination call with WPC today, broad Slight Risks exist on Days 4/5 for the WPC Excessive Rainfall Outlook product, with likely upgrades as finer details come into better focus.
NWS Kansas City/Pleasant Hill, Area Forecast Discussion, 2:41 p.m. Sat Sep 26

What changed from the discussion before

  • The midweek rain went from something to monitor for flooding to increasing confidence in a wet Tuesday through at least Friday, with an increasing river and areal flooding threat.
  • Saturday afternoon showers and weak storms may be more widespread than earlier thought across portions of far eastern Kansas and western/northwest Missouri. (Portions of far eastern Kansas and western/northwest Missouri)
Read the NWS wording
- Increasing confidence in a period of wet conditions from Tuesday through at least Friday.
NWS Kansas City/Pleasant Hill, Area Forecast Discussion, 2:41 p.m. Sat Sep 26
Rounds of heavy rain may yield an increasing river and areal flooding threat through the week.
NWS Kansas City/Pleasant Hill, Area Forecast Discussion, 2:41 p.m. Sat Sep 26
With such high PWAT values we will need to monitor the potential for flooding next week.
NWS Kansas City/Pleasant Hill, previous Area Forecast Discussion, 12:20 p.m. Sat Sep 26
showers and weak thunderstorm activity may end up being more prevalent than initially thought across portions of far eastern Kansas and into western/northwest Missouri
NWS Kansas City/Pleasant Hill, Area Forecast Discussion, 2:41 p.m. Sat Sep 26
- Showers continue on and off throughout the day Saturday, increasing in coverage by tonight into early Sunday morning.
NWS Kansas City/Pleasant Hill, Hazardous Weather Outlook, 5:01 a.m. Sat Sep 26

Where the NWS text was unclear

  • The new discussion does not mention Monday. The earlier discussion called for a brief dry spell Monday with highs in the mid to upper 70s.
Read the NWS wording
- Dry out briefly Monday with slightly warmer temperatures before rain chances return for the middle of next week.
NWS Kansas City/Pleasant Hill, Hazardous Weather Outlook, 5:01 a.m. Sat Sep 26
With the ridge moving back in Monday high temperatures will be back in the mid to upper 70s.
NWS Kansas City/Pleasant Hill, previous Area Forecast Discussion, 12:20 p.m. Sat Sep 26

The numbers then

Not recorded: wxexplained began keeping the NWS forecast numbers on November 6, 2026.

From the 2:21 a.m. discussion

Isolated to scattered showers today, mainly south/east of I-35; dry Monday into Tuesday; heavy rain, possible flooding Tuesday night through Thursday.

From the NWS discussion issued 2:21 a.m. Sun Sep 27.

The forecast

  • Today (Sunday) (Mainly south and east of I-35): Isolated to scattered showers again today, mainly south and east of I-35. A few thunderstorms are possible, but severe weather is not expected because the wind doesn't change much with height (weak shear).
  • Sunday night: Rain chances should finally start to wind down between 10 PM Sunday and 1 AM Monday.
  • Monday into Tuesday: Dry conditions are expected Monday into Tuesday.
  • Tuesday night through Thursday (The region; where the heaviest rain falls is uncertain): Multiple rounds of heavy rain are expected, fed by Gulf moisture and the remnants of what is currently Hurricane Polo. Where the heaviest rain sets up is still uncertain.
  • Rain totals through 7 PM Friday (Not limited by the NWS; heaviest areas uncertain): Forecast models show roughly a 10-20% chance of at least four inches of rain, and 20-30%+ for at least 3 inches, through 7 PM Friday.

How sure forecasters were

Forecasters say the potential for heavy rain and flooding in the middle of the week is increasing, but there remains a fair amount of uncertainty on where the heaviest rain will fall.

Read the NWS wording
- Isolated to scattered showers again today, mainly for areas south/east of I-35.
NWS Kansas City/Pleasant Hill, Area Forecast Discussion, 2:21 a.m. Sun Sep 27
A few thunderstorms are possible as well, but severe weather is not expected.
NWS Kansas City/Pleasant Hill, Area Forecast Discussion, 2:21 a.m. Sun Sep 27
shear remains weak so
NWS Kansas City/Pleasant Hill, Area Forecast Discussion, 2:21 a.m. Sun Sep 27
severe weather is not anticipated
NWS Kansas City/Pleasant Hill, Area Forecast Discussion, 2:21 a.m. Sun Sep 27
finally start to wind down by 03Z [10 PM CDT] to 06Z [1 AM CDT] Monday, leading to dry
NWS Kansas City/Pleasant Hill, Area Forecast Discussion, 2:21 a.m. Sun Sep 27
conditions for Monday into Tuesday.
NWS Kansas City/Pleasant Hill, Area Forecast Discussion, 2:21 a.m. Sun Sep 27
Multiple rounds of heavy rain are expected in the region from Tuesday night through Thursday.
NWS Kansas City/Pleasant Hill, Area Forecast Discussion, 2:21 a.m. Sun Sep 27
This moisture is will be the remnants of what is currently Hurricane Polo.
NWS Kansas City/Pleasant Hill, Area Forecast Discussion, 2:21 a.m. Sun Sep 27
With all that said, there remains a fair amount of uncertainty on where the heaviest rains will actually setup.
NWS Kansas City/Pleasant Hill, Area Forecast Discussion, 2:21 a.m. Sun Sep 27
Ensemble guidance shows roughly a 10-20% chance for at least four inches of rain for the run ending at 7PM Friday.
NWS Kansas City/Pleasant Hill, Area Forecast Discussion, 2:21 a.m. Sun Sep 27
This combination of rich lower-to-mid-level moisture and upper-level moisture will lead to very anomalous precipitable water values. In fact, these values are 3+ standard deviations above normal for this time of year, above the 99.5 percentile for a large portion of the area, and at the max values on the NAEFS percentiles and GEFS M-climate. Ensemble guidance shows roughly a 10-20% chance for at least four inches of rain for the run ending at 7PM Friday. This jumps to 20-30%+ for total rain of at least 3 inches through the same time frame.
NWS Kansas City/Pleasant Hill, Area Forecast Discussion, 2:21 a.m. Sun Sep 27
This jumps to 20-30%+ for total rain of at least 3 inches through the same time frame.
NWS Kansas City/Pleasant Hill, Area Forecast Discussion, 2:21 a.m. Sun Sep 27
- The potential for heavy rain and flooding for the middle of the week is increasing.
NWS Kansas City/Pleasant Hill, Area Forecast Discussion, 2:21 a.m. Sun Sep 27

What to watch

Heavy rain and flooding

Tuesday night through mainly Thursday (The region; areas with the greatest flooding potential not yet known)

The potential for heavy rain and flooding is increasing, with multiple rounds of heavy rain expected Tuesday night through mainly Thursday.

Read the NWS wording
- The potential for heavy rain and flooding for the middle of the week is increasing.
NWS Kansas City/Pleasant Hill, Area Forecast Discussion, 2:21 a.m. Sun Sep 27
Focus then turns to the potential for widespread heavy rainfall and flooding for the middle to later portions of the work week, Tuesday night through mainly Thursday.
NWS Kansas City/Pleasant Hill, Area Forecast Discussion, 2:21 a.m. Sun Sep 27
Multiple rounds of heavy rain are expected in the region from Tuesday night through Thursday.
NWS Kansas City/Pleasant Hill, Area Forecast Discussion, 2:21 a.m. Sun Sep 27

Why the forecast might change

  • Where the heaviest rain and greatest flooding risk end up depends on where the storm system's strongest lift and its fronts set up as it moves into the Plains Wednesday into Thursday.
Read the NWS wording
That will largely depend on where the strongest forcing sets up as the shortwave ejects into the Plains Wednesday into Thursday as the system takes on distinctive mid-lattitude cyclone characteristics, with a notable deformation area, a warm frontal region extending eastward, and cold front extending southward.
NWS Kansas City/Pleasant Hill, Area Forecast Discussion, 2:21 a.m. Sun Sep 27
Each of these areas will provide a focus for heavy rainfall and placement of these features will be key to defining the areas with the greatest flooding potential.
NWS Kansas City/Pleasant Hill, Area Forecast Discussion, 2:21 a.m. Sun Sep 27

What changed from the discussion before

  • For Sunday, the previous discussion expected showers into Sunday morning and drying through the day; now isolated to scattered showers continue today, mainly south and east of I-35, winding down 10 PM to 1 AM. (Mainly south and east of I-35)
  • The previous discussion said the best heavy-rain potential was over the northwest half of the area; the current one no longer singles out an area and says placement is uncertain. (Northwest half of the forecast area (previous); not specified now)
Read the NWS wording
- Isolated to scattered showers again today, mainly for areas south/east of I-35.
NWS Kansas City/Pleasant Hill, Area Forecast Discussion, 2:21 a.m. Sun Sep 27
finally start to wind down by 03Z [10 PM CDT] to 06Z [1 AM CDT] Monday, leading to dry
NWS Kansas City/Pleasant Hill, Area Forecast Discussion, 2:21 a.m. Sun Sep 27
- Showers and occasional general thunderstorm chances continue into Sunday morning.
NWS Kansas City/Pleasant Hill, previous Area Forecast Discussion, 6:16 p.m. Sat Sep 26
mid-level height rises slide in Sunday, drying conditions out
NWS Kansas City/Pleasant Hill, previous Area Forecast Discussion, 6:16 p.m. Sat Sep 26
With all that said, there remains a fair amount of uncertainty on where the heaviest rains will actually setup.
NWS Kansas City/Pleasant Hill, Area Forecast Discussion, 2:21 a.m. Sun Sep 27
Lastly, the current best potential tends to reside over the NW half of the CWA or so, especially as you consider those areas have the most saturated soils as well (via NASA SPoRT).
NWS Kansas City/Pleasant Hill, previous Area Forecast Discussion, 6:16 p.m. Sat Sep 26

Where the NWS text was unclear

  • The previous discussion mentioned broad Slight Risks for Tuesday and Wednesday in the Weather Prediction Center's Excessive Rainfall Outlook (a heavy-rain flooding outlook); the current discussion doesn't say whether that still stands.
Read the NWS wording
After an expansive (geographically) coordination call with WPC today, broad Slight Risks exist on Days 4/5 for the WPC Excessive Rainfall Outlook product, with likely upgrades as finer details come into better focus.
NWS Kansas City/Pleasant Hill, previous Area Forecast Discussion, 6:16 p.m. Sat Sep 26

The numbers then

Not recorded: wxexplained began keeping the NWS forecast numbers on November 6, 2026.

From the 2:56 p.m. discussion

The NWS discussion issued 2:56 p.m. Sun Sep 27

The plain version didn't pass the accuracy check (a quote or number didn't match the NWS text), so the NWS text was shown instead.

Key messages

- Gradual warming trend expected through Tuesday.

- Multiple rounds of showers and thunderstorms are likely for
  Tuesday night through Thursday night with heavy rainfall
  possible due to an influx of tropical moisture from the
  remnants of Hurricane Polo.

Discussion

Current H5 analysis shows a deep closed low (nor'easter) off
the coast of New Jersey, with mid/upper ridging across the
western CONUS east of another trough making landfall across the
West Coast, with weak north northwesterly H5 flow in place
across our CWA. At the surface, light and variable winds are
present between a surface high over northern Wisconsin and a
subtle surface low near the Red River. A relatively saturated
boundary layer has yielded persistent low level cloud cover with
some patchy drizzle and even a few light showers toward central
Missouri. Isolated pop up showers will be possible later this
afternoon, but most areas should remain dry. For tonight, mostly
cloudy skies should persist, with perhaps some patchy fog and
temperatures dropping into the upper 50s to lower 60s by early
Monday morning.

Temperatures should warm a bit Monday and into Tuesday as the
western trough digs into southern California and Hurricane Polo
approaches Baja California, sending the western ridge axis
closer to our CWA. As we head into Wednesday and Thursday, the
remnants of Polo's moisture plume is progged to get absorbed by
the deepening upper trough as it crosses the Southern Rockies
into the Southern Plains and enhanced south southwesterly flow
overspreads our CWA. With PWATs on the order of 1.8 to 2 inches
and ample forcing for ascent, scattered to widespread showers
and thunderstorms are likely to begin by late Tuesday night
across far NW Missouri, expanding in coverage to cover the
entire CWA by Wednesday and into Thursday. Some differences
remain in where exactly models want to place the heaviest
rainfall amounts, and most recent guidance has actually
decreased QPF across the CWA. However, current grids still show
roughly 2 to 3 inches of rain across the region for Tuesday
evening through Thursday evening, with highest amounts across NW
Missouri and NE Kansas. Cloud cover and some patchy showers may
linger into Friday morning, but at least some sunshine and dry
conditions should return by Friday evening and into the weekend,
with daily high temperatures ranging from the upper 60s to
lower 70s and overnight lows in the 50s.

Eax watches/warnings/advisories

MO...None.
KS...None.

The numbers then

Not recorded: wxexplained began keeping the NWS forecast numbers on November 6, 2026.