Edition 2026-09-16 The Ledger Archive API RSS Weather Trader
Milepost
1108

TheForecast Post

A chronicle of American weather and climate  ·  Wednesday, 16 September 2026

HVE The Ledger MILEPOST 1030

The month's worst miss: NBM was 29.6°F too warm at HVE

A day-8 forecast of 92.2°F for September 1 at 00Z; the station reported 62.6°F. It is the largest temperature residual in the ledger over the last 30 days.

The forecast was issued in the 20260824T00:00Z cycle, 192 hours before valid time, and called for 92.2°F. The observation was 62.6°F — a residual of +29.6°F.

292 of the 3,118 residuals above 12°F in this window are at the same station, which is a pattern worth reading as one.

ASOS reports at :53 and the forecast is stamped on the hour, so a forecast is paired with the nearest observation within 30 minutes and otherwise left unscored. 2 rows in this window were excluded as a data defect rather than a forecast error.

The numbers in this piece, with what they are measured against
forecast, day 8
Forecast Network verification ledger
92.2 °F normal 62.6 °F
August 11–September 10, 2026
residual
Forecast Network verification ledger
29.6 °F normal 0.0 °F · 1 of 3,118
August 11–September 10, 2026
Milepost
1030 · laid 2026-09-10T12:29:55Z
Model
nbm · cycle 20260824T00:00Z
Desk
ledger v1
Method
ASOS reports at :53 and the forecast is stamped on the hour, so a forecast is paired with the nearest observation within 30 minutes and otherwise left unscored.
Source
/home/maue/forecastpoints/data/verify/2026-08.ndjson
/home/maue/forecastpoints/data/verify/2026-09.ndjson
Digest
3ea3952b208c69005e38188266d9a57ded21423fe3fc77bde4cb3b46de9857b0
Machine
JSON