Drawn as the kind of place it stands at. 108 instruments in Pennsylvania stand at one.
What the snow tracker reads here
Every instrument in this state
-in
Snow on the ground
Station charts
Allegheny River at Natrona Report
Rank 314 of 1,383 in Pennsylvania, Oct 16. The 247 rank orders a state's stations by their 247 score out of 100: how reliably they report, how accurate their readings are against a reference station, how their readings pass their checks, and how they stand against the forecast.
Ranking Statistics
247 score97.7of 100
Pennsylvania median
94.3the median score of 1,383 stations
Scoring higher
310stations in Pennsylvania
Sharing its score
28ranks 311 to 338
Points deducted
2.31.6 arrival, 0.7 forecast check
Counted at the median
Accuracy, instrument checks, forecast checknot measured at this station; Pennsylvania median 100.0, 100.0, 92.9
Next above
01573710rank 311; ahead on median arrival 17 min 48 s against 17 min 49 s
Next below
MONP1rank 320; behind on median arrival 17 min 49 s against 17 min 50 s
Sharing its rank
5other stations, equal on every measure
Equal scores are ordered by the share of scheduled reports received, then the reports due in the week (the longer record first), then the median arrival, then the longest silence.
Reports receivedweight 35100.035.0 of 35 pointsPennsylvania median 95.8168 of 168 scheduled reports received in 7 days
Arrivalweight 1084.48.4 of 10 pointsPennsylvania median 94.8half its reports arrived within 18 min
Continuityweight 10100.010.0 of 10 pointsPennsylvania median 100.0longest silence 60 min, on a schedule of one report every 60 min
Accuracyweight 20-20.0 of 20 points, at the medianPennsylvania median 100.0-
Instrument checksweight 15-15.0 of 15 points, at the medianPennsylvania median 100.0-
Forecast checkweight 10-9.3 of 10 points, at the medianPennsylvania median 92.9-
The score is the weighted mean of its six parts, from the last 7 days. How a station is ranked sets out each part.
How each part is scored
Reports received
Full marks for every scheduled report received, none for none, in proportion between
Arrival
Full marks for a median arrival within 10 min, none at 60 min
Continuity
Full marks for a longest silence of 3 reports or less (3 h), none for 72 (72 h)
Accuracy
Full marks within 1.5 °F of its reference, typically, none beyond 8.0 °F
Instrument checks
Full marks for no reading failed, none for 5 per cent or more
Forecast check
Full marks within 2 °F of the forecast on average, none at 8 °F
At 736 ft above sea level, 3 per cent of the atmosphere's air lies below the station. The standard atmosphere puts the pressure there at 29.13 inHg and the temperature at 56.4 F.
On Oct 16 the noon sun stands 40 degrees above the horizon at 40.62 N, and the day is 10 h 57 min long. Level ground there takes 65 per cent of the noon sunlight a surface facing the sun would.