October Deep Dive — October 2, 2026

Status: CURRENT. Supersedes the research/18 grid. Companion files: research/grades-2026-10.md (grading), research/predictions-2026-11.md (rows #40–45, frozen today), research/21-confidence-review-2026-10-02.md (how sure we are, and why), OctoberHayReport.md/.html (share-ready), review_2026-10-02.md (the pre-publication review, unedited).

Method. Three parallel pulls (AMS hay reports for all seven states; water, rain, drought and ENSO; NASS and macro), all raw files saved under data/2026-10-02/ (ams/, wx/, macro/). Every load-bearing number was re-checked by the operator by a second method (§9). Then an outside reviewer read the draft against the saved files (L11 rule 9). It found 17 problems, three of them HIGH; all are fixed in this version and listed in §11. Pipeline update_weekly.sh ran; its only failures were the expected "grades file must state the new coverage" checks, fixed by grades-2026-10.md.

1. Bottom line

Southeast Colorado Good/Premium large-square alfalfa: about $275/ton at origin today, range $210–340, LOW confidence. No grading-target trade printed (no Southeast Good-or-better large-square sale of 100+ tons). Eight defensible ways of averaging the regional sales give $262–308, median $273.5; we round to $275. That is $5 above the Sep 19 estimate, which is noise inside the range. The number is most sensitive to geography: northern sales (Colorado, Nebraska, Wyoming) average $283, Kansas and Oklahoma $239.

What changed is the weather, not the price. Lamar Airport had 3.18" in July, 4.47" in August and 4.50" in September (normal 1.03"; that includes 2.17" on Sep 30), then 0.96" on Oct 1. Bent County went from 61% severe-or-worse drought (Sep 8) to 0% (Sep 29 map, before the Sep 30 storm). The Fort Lyon Canal, dry Sep 7–9 and Sep 11–20, is running at 371–405 cfs. We have no measured skill at turning weather into price (L10). We still cut the winter lift because of it; that is a weather-driven judgment, logged as an exception (§7).

Grades: Colorado's August state prices came in at our points ($235 alfalfa exactly, all-hay +$1); Kansas missed its point by $28 but stayed inside a wide range. Standing record 9 of 19 ranges contained the outcome (+2 NEAR). We also missed a categorical call: we said no Southeast per-ton farm sale would print on Sep 24, and a 25-ton Fair lot did, at $250.

2. Grading (details in research/grades-2026-10.md)

Judgment vs persistence. The rows were frozen Aug 27; the only persistence baseline available then was June (210/207/125, the anchors written into the rows). Against it, judgment won: MAE $9.7 vs $17.0 — it won on Colorado (errors 0 and 1 vs 25 and 24) and lost on Kansas (28 vs 2), where we bet the state average would chase cash and it moved $1. July prices (225/222/126, published Aug 31, after the freeze) would have scored $6.7; that is a later-information benchmark, not a fair test of the call. (A first draft and the pre-publication review said July persistence was the fair baseline and "judgment lost"; a second review (codex) caught the date error.)

Partial windows (graded later): Sep 24 had no SE ≥100-t Good-or-better trade (#29), no Colorado ≥500-t farm alfalfa trade (#30; the 4,320 t was millet), no NE dairy alfalfa line (#31), and demand "Good to Very Good" (#32, first half).

3. The market, report by report (primary files in data/2026-10-02/ams/)

NASS August prices (released Sep 29), alfalfa $/ton: CO 235 (+10), NM 285 (+5), WY 230 (+10), TX 230 (0), OK 193 (+5), KS 127 (+1), NE 104 (+1), US 206 (+3). US all-hay $190 (+$6). July not revised anywhere.

4. The nowcast, built in the open

Governing rule (research/18): conventional alfalfa; completed per-ton trade; large squares (3x4/4x4) only; ≥100 t; price at origin (FOB, FOB-farm, FOB-dairy, FOB-stables as printed); Good grade or better (Fair/Good lots are a lower grade class and are shown separately); rounds, delivered prices and organic excluded. L11(2)'s older wording ("≥500-t lots in NE CO, WY, W NE, KS") is shown as a variant. Computed by scripts/comp_set.py, which reproduces both Sep 19 sets exactly (G/P $269.8 on 1,840 t; Good $268.7 on 4,050 t) before being trusted on new files.

Estimate: $275 = the rounded median of the eight ($273.5). It is not a directional judgment; the spread is $262–308. Good ~$270. Fragility: the governing anchor is $299.6 without the Oklahoma $170 lot, and the rolling set is $276.0 without it. By region, northern lots (CO/NE/WY, 6,450 t) average $283 and Kansas/Oklahoma lots (2,340 t) $239; which buyers a McClave seller reaches matters more than any rule above. Lot-to-lot spread (tonnage-weighted SD) is $32, which by itself supports a ±$65 range for any single sale. Like-for-like, western Nebraska G/P slipped $18 and Wyoming's G/P rose $35 on a different bale and basis: no trend we can claim.

Fair/Good large squares (mostly Kansas, Sep 15): wa $203 on 4,260 t, $125–245. Including them, all large squares average $249.

Import parity into Bent County (market_parity.csv, $0.157/t-mi derived from DAT flatbed $2.59/mi linehaul, wk ending Sep 25, plus fuel at $6.38 diesel): Oklahoma 4x4 lands $211–287; Kansas dairy P/S $273; western Nebraska G/P $321–351; Wyoming G/P $382. No export netback is computed (no delivered price with a known destination printed).

Regime-change rule check (forecast_policy.json): no directly comparable trade printed, so it does not fire.

5. Weather, water, drought (primary files in data/2026-10-02/wx/)

• Rain, Lamar Airport (USW00003013, ACIS, no missing days): Jul 3.18", Aug 4.47", Sep 4.50" (normal 1.03"; includes 2.17" on Sep 30), Oct 1 0.96". La Junta AP Sep 6.11" (normal 0.84"); Rocky Ford Sep 4.02"; Las Animas Sep 3.63" plus 4.50" logged Oct 1 (single source).
• Fort Lyon Canal: dry Sep 7–9 and Sep 11–20; FLCC's own 1884 priority came into the river on Sep 21; telemetry 78 cfs Sep 21 → 160 Sep 30 → 405 cfs Oct 1 (daily mean); FLCC page this morning: headgate 371 cfs, "Run #5", Las Animas, Limestone and Lamar divisions open. Jun–Sep diversions ~26,000 AF (26,445 CDSS monthly; 25,969 telemetry) = 25–26% of the 2010–25 average (102,502 AF). Gotcha: CDSS daily "Total" records carry repeated placeholder values for Sep 7–9 (33.8 cfs) and Sep 11–Oct 2 (37.3 cfs); the monthly 26,445 includes them, so the two methods share inputs and their agreement is partly luck. Use telemetry for September.
• Reservoirs: John Martin 22,978 AF (CDSS telemetry, Oct 2 08:15; USGS lake elevation 3802.41 ft agrees) and rising, up from 19,412 on Sep 18. The USACE morning report, unreachable at first and retrieved later the same morning (wx/usace_johnmartin_2026-10-01.html), shows 20,228 AF at the end of Sep 30 (+578 AF that day): an earlier observation of the same rise, not a conflict. Pueblo 157,315 AF (Oct 1), down from 161,265.
• Rivers today: Purgatoire ~1,050–1,900 cfs (median 9); Arkansas at Lamar 1,800 cfs (median 17).
• Drought (USDM map valid Sep 29, before the Sep 30 storm): Bent County D1 48%, D2+ 0% (D2+ was 61% on Sep 8). DSCI: CO 277, KS 139, NE 151, NM 253, WY 270, all improving; OK 372 and TX 288, both worse (OK 92% D2+, 24% D4).
• Pasture, very poor + poor (Sep 27 vs Sep 20): CO 46 (52), KS 37 (39), NE 43 (57), NM 55 (57), OK 65 (67), TX 59 (60), WY 65 (67); 48 states 51 (53; 35 a year ago).
• ENSO: weekly traditional Niño-3.4 +2.9 (09SEP), +3.0 (16SEP), +3.1 (23SEP); the 02SEP line was later revised +2.7 → +2.8 (row #26 stays graded on the value available at discussion time, per its spec). El Niño Advisory; 75% "historic event" odds (Sep 10). Next discussion Oct 8; the 30SEP line posts Oct 5.
• Outlooks: 6–10 and 8–14 day lean dry at McClave; October no lean; OND 40% wet; Seasonal Drought Outlook: removal at McClave, improvement at Pueblo, Dodge City, Guymon, Amarillo, Oklahoma City.
• Snowpack: six Arkansas-basin SNOTEL sites at 0.0–0.4" SWE. Nothing to read until Nov 1 / Dec 1.

What the rain does and doesn't do (inference, not measured): it adds little 2026 hay (most districts are on their last cutting; first freeze at Lamar is typically mid-October). It does (a) green local pasture and wheat, which cuts local cow-calf hay demand this winter, (b) refill soil and start refilling John Martin for 2027, and (c) lower the grade of hay that was cut or stored uncovered. Oklahoma and Texas moved the other way. Net for SE Colorado price: two-sided.

6. Demand and costs (primary files in data/2026-10-02/macro/)

• Cattle: Sep 1 on feed 11,163k (101%); August placements 1,617k (91%), the lowest August since the series began in 1996; marketings 97%. Futures (Yahoo delayed quotes saved Oct 2 ~14:20 UTC, not settlements): feeders Oct $335.43, live cattle Oct $218.60.
• Dairy: Colorado milk cows 218k (211k a year ago), production +3.9%. Class III Oct $15.08, Nov $15.80, Dec $16.22 (same source). Weak milk, growing herd.
• Grain: Dec corn $5.00 (499.75¢, same source), down from $5.27½ on Sep 19.
• Fuel: US diesel set a new record $6.529 on Sep 21 (the $6.285 "record" cited Sep 19 was passed), then $6.382 on Sep 28. Rocky Mountain $6.407, a series high. L1: marked to market, not forecast.
• Fertilizer PPI (WPU0652013A): August 144.547 (prelim), −9.6% m/m.
• Trade (secondary, DTN): the US–China truce was extended from Nov 10 to Jan 10, 2027. US hay exports H1 −8% (secondary).

7. The grid (data/current/premium_forecast.csv, version "research/20")

L10 honesty note. Weather has not passed the evidence gate, and it still moved the Nov–Jan midpoint by about −$11 and the spring roll-off. The amended policy permits that only as a logged exception, and it is logged (forecast_adjustments.json). It is judgment, not a measured effect. forecast_preflight.py: OK. State-benchmark grid unchanged (Sep $240, Oct $245, Dec $255, Jan–Mar $260).

Falsifiers. Down: a Colorado ≥500-t farm sale at or under $240; Kansas/Oklahoma wheat-pasture reports after the rain; NE/WY tone going from "moderate" to "light". Up: any ≥500-t Good-or-better print at or above $300 in Colorado; Oklahoma's Oct 2 report still "calling all hay producers" with prices up; Colorado's September state price ≥$260 (Oct 30).

8. For the seller (holdings, grade and storage UNVERIFIED)

1. Look at the stack first. About 13" of rain fell at Lamar Airport from July 1 to Oct 1, 3" of it on Sep 30–Oct 1. If the 2025 carryover sits uncovered, the outside of every exposed bale has taken weather. Probe-sample inside and outside bales separately. We have almost no local price evidence on weather damage: one same-report pair (Aug 28, 2025: Fair "Bleached" 1st cut $125 vs Good/Premium 2nd cut $140, 25 t each) also differs in cutting. Mold or heating can make hay unsaleable to dairy and horse buyers (general agronomy, not measured here).
2. Then test, weigh, and get three bids on the same description. Unchanged procedure (research/19).
3. Reference sales, not values: Southeast Kansas, same report, Fair/Good 3x4: 150 t "Old Crop" $125 vs 450 t $200 (Sep 15) — the only old-crop large-square trade this cycle, and the closest to the seller's hay on crop age; SE Colorado Fair weedy 3x4, 25 t, $250 FOB-farm (Sep 24, new-crop 3rd cut) — the closest on location; NE CO Good 3x4 2,000 t $260 (Sep 10); western NE G/P 700 t $291 (Sep 24); OK G/P 4x4 380 t $170 (Sep 18, crop age not stated).
4. Crop-age discount evidence is heterogeneous. Same-report: −37% (Kansas, Fair/Good, n=1). Cross-season SE Colorado pairs: −8% (Good 3x4 $180 Sep 19, 2024 → $165 "old crop" Jan 8, 2025) to 0% ($180 on Feb 27, 2025); those mix crop age with season and a falling market, and none measures hay held through a second summer, which is the seller's case. Working judgment for untested 2025 carryover, wide on purpose: $200–270 if it tests Good and is sound; $150–240 if Fair or weathered; lower if moldy. No trade of untested carryover printed.
5. Holding loses on our numbers. Illustrative: $260 net bid today. Three more months cost ~$10/ton plus ~3% shrink, so January must net ($260 + $10) ÷ 0.97 = $278. On the same basis, our grid moves $275 → $280 by January, so a $260 net today becomes ~$265 net in January: about −$13/ton expected, with ±$65 around it and weather risk on an uncovered stack. Selling a meaningful share on a firm bid now beats waiting, on our numbers.
6. On $180: $70 under the only local farm sale this cycle (a weedy Fair new-crop lot), $23 under the Kansas Fair/Good FOB average ($203), and $55 over the Kansas old-crop lot ($125). It is not under every trade. If the stack is sound and tests Good, competing bids should beat it; if it is old and weathered, $180 may be a fair bid. Test first.
7. Exit rules unchanged and senior: Dec 1 basin SWE ≥ median → sell everything by Christmas; never hold past the Feb 1, 2027 reading.

9. Verification table (claim | method 1 | method 2 | status)

10. What we could not get

The Kansas report expected Sep 29; the Oklahoma and Texas reports due today (not posted at 08:49 MDT); the USACE John Martin morning report (retrieved later the same morning; see §5); the 30SEP Niño-3.4 line (posts Oct 5); Horse Creek storage. Local private asking prices for the Arkansas Valley: searched, none published (Front Range asks $340–375). Kansas and Oklahoma are the two that could move the nowcast; research/21 sizes that.

11. Pre-publication review (review_2026-10-02.md) — what it found, what changed

12. Second review (codex, same day, after commit 358a693, before push)

Third review (codex, same day, after 7ecc22a): (1) the regenerated signals.html said "0 cfs in canal" — signal_dashboard.py summed the FLCC page's division PM column, which reads 0 until afternoon; it now reads the page's "Headgate N CFS" line (371 cfs) with the page's own update stamp (10/2/2026 7:15 a.m.). (2) "August-only rain" summed Aug 1 → today (20.30") and judged timing by day-of-month; now bounded to Aug 31 and timed by full date (6.67", two-station sum). Both were pre-existing generator bugs that this run republished. (3) Figure 08: marker size capped so large lots no longer hide the next row's label; local-sale label shortened. Archive revision 3; earlier revisions kept as -rev1/-rev2.

Fourth review (codex, same day, after 73533de): (1) the FLCC fallback summed the division "AM/PM In Use" table (lateral deliveries, not headgate flow) — removed; no headgate line now means "unknown". (2) the dashboard stamped the USACE John Martin storage (20,228 AF, end of Sep 30) as today; it now shows the report's own period date; that also explains the gap with the 22,978 AF CDSS reading (Oct 2 08:15). (3) the SE AMS price tile silently vanished because it only looked in data/<date>/hay/; it now finds ams/ams_2905_<date>.txt saves too and shows the $250 Sep 24 lot. (4) research/21 said both "0" and "about two" comparable local outcomes; it is zero. New tests/test_dashboard_parsers.py (7 tests) pins all three parsers to the saved pages.

Fifth review (codex, full dashboard audit, after 55686ef): nine findings, all in pre-existing dashboard code except one stale line in this report. Fixed: the dashboard price chart now plots statewide all-hay actuals under the v2 all-hay forecast (it plotted alfalfa); winter snowpack tile implemented (6-station index vs its 2015–25 median, labeled a proxy for the NRCS number that decides); ENSO parsed with entities decoded, status/issue date from the page, newest saved discussion as fallback, no hard-coded August text; rain tiles refuse to publish when >10% of days are missing; seller guidance on the dashboard now comes from project_context.json → seller_guidance (the old "hold to Nov–Jan, $255–265" text is gone); forecast chart limits come from the full low/high range; Bent County, diesel and Pueblo verdicts use one threshold function each, live and cached; CDSS call responses are validated and the "most senior" detail is built from the records; the John Martin limitation above is corrected (USACE retrieved later: 20,228 AF end of Sep 30).