Lower Ameri Fork Pwhs Weather Records (USC00425219)

Record envelope, standing records and threshold days for Lower Ameri Fork Pwhs (USC00425219), Utah, United States, with 44 years of record.

Key Facts for Lower Ameri Fork Pwhs

Lower Ameri Fork Pwhs (USC00425219) is a weather station in Utah, United States at 40.43 latitude and -111.75 longitude, 1,537 m (5,043 ft) above sea level.
The station reports from 1914 to 1957, 44 years of record.
1,464 records set at Lower Ameri Fork Pwhs still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
Lower Ameri Fork Pwhs set a daily record low maximum temperature of 8.9 C (48.0 F) on 21 May 1957.

About the Station

Location: Utah, United States, 40.43 latitude, -111.75 longitude.
Elevation: 1,537 m (5,043 ft).
Period of record: 1914 to 1957, 44 years.
Eligible elements: tmax, tmin, prcp.

Daily Record Envelope and 2026

0 days at or beyond a record

The band shows the record high and record low for each calendar day at Lower Ameri Fork Pwhs. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.

Daily record high and record low at Lower Ameri Fork Pwhs, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	17.8 C (64.0 F)	-26.1 C (-15.0 F)	n/a	n/a
Feb	21.1 C (70.0 F)	-26.1 C (-15.0 F)	n/a	n/a
Mar	25.0 C (77.0 F)	-15.0 C (5.0 F)	n/a	n/a
Apr	29.4 C (84.9 F)	-9.4 C (15.1 F)	n/a	n/a
May	34.4 C (93.9 F)	-1.7 C (28.9 F)	n/a	n/a
Jun	42.2 C (108.0 F)	0.0 C (32.0 F)	n/a	n/a
Jul	42.2 C (108.0 F)	4.4 C (39.9 F)	n/a	n/a
Aug	38.9 C (102.0 F)	3.3 C (37.9 F)	n/a	n/a
Sep	37.8 C (100.0 F)	-0.6 C (30.9 F)	n/a	n/a
Oct	30.6 C (87.1 F)	-7.2 C (19.0 F)	n/a	n/a
Nov	22.2 C (72.0 F)	-19.4 C (-2.9 F)	n/a	n/a
Dec	21.1 C (70.0 F)	-24.4 C (-11.9 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Lower Ameri Fork Pwhs still stand. 1917 holds the most, with 56.

Standing records at Lower Ameri Fork Pwhs by the year they were set
Year set	Standing records
1914	20
1915	18
1916	51
1917	56
1918	37
1919	42
1920	27
1921	30
1922	45
1923	27
1924	48
1925	25
1926	50
1927	35
1928	20
1929	36
1930	43
1931	45
1932	38
1933	24
1934	44
1935	21
1936	39
1937	41
1938	33
1939	45
1940	32
1941	26
1942	40
1943	32
1944	15
1945	20
1946	25
1947	27
1948	33
1949	44
1950	47
1951	22
1952	18
1953	29
1954	43
1955	41
1956	26
1957	4

All-Time Record Progression

1 new records

1 all-time records were set at Lower Ameri Fork Pwhs between 22 April 1957 and 22 April 1957. Each dot is a new record.

Wettest Day of Each Month

Apr: 60.5 mm (2.4 in)

The wettest day on record for each calendar month at Lower Ameri Fork Pwhs. The most was 60.5 mm (2.4 in) on 22 April 1957.

Record daily precipitation for each month at Lower Ameri Fork Pwhs
Month	Record daily precipitation (mm)	Date
Jan	39.1 mm (1.5 in)	24 January 1952
Feb	38.1 mm (1.5 in)	12 February 1941
Mar	56.1 mm (2.2 in)	24 March 1916
Apr	60.5 mm (2.4 in)	22 April 1957
May	44.7 mm (1.8 in)	20 May 1949
Jun	45.2 mm (1.8 in)	14 June 1955
Jul	37.3 mm (1.5 in)	3 July 1925
Aug	31.2 mm (1.2 in)	26 August 1932
Sep	30.0 mm (1.2 in)	24 September 1923
Oct	55.4 mm (2.2 in)	28 October 1946
Nov	31.2 mm (1.2 in)	10 November 1949
Dec	30.7 mm (1.2 in)	23 December 1944

Period of Record Coverage

1914 to 1957

44 years of record at Lower Ameri Fork Pwhs, 1914 to 1957. 4 years have data for under 90 percent of days and are left out of rankings: 1921, 1931, 1933, 1957.

Days with data per year at Lower Ameri Fork Pwhs
Year	Days with data	Share of year	Complete
1914	338	93%	Yes
1915	351	96%	Yes
1916	341	93%	Yes
1917	363	99%	Yes
1918	364	100%	Yes
1919	358	98%	Yes
1920	361	99%	Yes
1921	296	81%	No
1922	357	98%	Yes
1923	333	91%	Yes
1924	355	97%	Yes
1925	356	98%	Yes
1926	362	99%	Yes
1927	364	100%	Yes
1928	356	97%	Yes
1929	360	99%	Yes
1930	348	95%	Yes
1931	261	72%	No
1932	330	90%	Yes
1933	163	45%	No
1934	365	100%	Yes
1935	365	100%	Yes
1936	366	100%	Yes
1937	344	94%	Yes
1938	364	100%	Yes
1939	365	100%	Yes
1940	365	100%	Yes
1941	351	96%	Yes
1942	365	100%	Yes
1943	361	99%	Yes
1944	366	100%	Yes
1945	363	99%	Yes
1946	362	99%	Yes
1947	333	91%	Yes
1948	365	100%	Yes
1949	365	100%	Yes
1950	365	100%	Yes
1951	364	100%	Yes
1952	364	99%	Yes
1953	364	100%	Yes
1954	360	99%	Yes
1955	360	99%	Yes
1956	365	100%	Yes
1957	151	41%	No

Latest Records

Latest records at Lower Ameri Fork Pwhs
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 May 1957	Lower Ameri Fork Pwhs, US	daily low max	8.9 C (48.0 F)	1.1 C (2.0 F)	30 years	15 of 100 (Routine)
20 May 1957	Lower Ameri Fork Pwhs, US	daily low max	8.3 C (46.9 F)	3.4 C (6.1 F)	12 years	13 of 100 (Routine)
20 May 1957	Lower Ameri Fork Pwhs, US	daily low min	-0.6 C (30.9 F)	0.6 C (1.1 F)	8 years	7 of 100 (Routine)
15 May 1957	Lower Ameri Fork Pwhs, US	daily low max (Tie)	13.3 C (55.9 F)	tie	6 years	1 of 100 (Routine)
14 May 1957	Lower Ameri Fork Pwhs, US	daily rain	18.8 mm (0.7 in)	1.0 mm (0.04 in)	32 years	14 of 100 (Routine)
13 May 1957	Lower Ameri Fork Pwhs, US	daily rain	24.6 mm (1.0 in)	19.0 mm (0.7 in)	34 years	20 of 100 (Routine)
26 April 1957	Lower Ameri Fork Pwhs, US	daily low max	8.9 C (48.0 F)	0.5 C (0.9 F)	36 years	14 of 100 (Routine)
22 April 1957	Lower Ameri Fork Pwhs, US	all-time rain	60.5 mm (2.4 in)	4.4 mm (0.17 in)	41 years	43 of 100 (Notable)
18 April 1957	Lower Ameri Fork Pwhs, US	daily rain	15.7 mm (0.6 in)	8.1 mm (0.32 in)	40 years	20 of 100 (Routine)
30 March 1957	Lower Ameri Fork Pwhs, US	daily rain	21.8 mm (0.9 in)	7.8 mm (0.31 in)	30 years	20 of 100 (Routine)
17 March 1957	Lower Ameri Fork Pwhs, US	daily rain	11.2 mm (0.4 in)	4.8 mm (0.19 in)	3 years	11 of 100 (Routine)
24 February 1957	Lower Ameri Fork Pwhs, US	daily high min (Tie)	4.4 C (39.9 F)	tie	40 years	4 of 100 (Routine)
22 February 1957	Lower Ameri Fork Pwhs, US	daily high min (Tie)	4.4 C (39.9 F)	tie	21 years	2 of 100 (Routine)
30 January 1957	Lower Ameri Fork Pwhs, US	daily low min (Tie)	-15.6 C (3.9 F)	tie	8 years	1 of 100 (Routine)
11 December 1956	Lower Ameri Fork Pwhs, US	daily rain	22.1 mm (0.9 in)	16.5 mm (0.6 in)	8 years	20 of 100 (Routine)
7 December 1956	Lower Ameri Fork Pwhs, US	daily low min	-13.3 C (8.1 F)	1.6 C (2.9 F)	40 years	19 of 100 (Routine)
5 December 1956	Lower Ameri Fork Pwhs, US	daily rain	18.3 mm (0.7 in)	4.8 mm (0.19 in)	5 years	14 of 100 (Routine)
20 November 1956	Lower Ameri Fork Pwhs, US	daily low min	-11.7 C (10.9 F)	0.6 C (1.1 F)	26 years	12 of 100 (Routine)
19 November 1956	Lower Ameri Fork Pwhs, US	daily low min	-12.2 C (10.0 F)	1.6 C (2.9 F)	26 years	14 of 100 (Routine)
18 November 1956	Lower Ameri Fork Pwhs, US	daily low min	-10.6 C (12.9 F)	1.2 C (2.2 F)	26 years	13 of 100 (Routine)

Climate Trend

31 complete years, 1915 to 1956

One stripe for each of 31 complete years at Lower Ameri Fork Pwhs, 1915 to 1956. Blue stripes are years cooler than the station's own mean of 11.2 C (52.2 F); red stripes are warmer. The coolest year was 1929, at 9.7 C (49.5 F), and the warmest was 1934, at 13.4 C (56.1 F). The strongest colour marks a difference of 2.2 C (4.0 F).

Annual mean temperature at Lower Ameri Fork Pwhs as warming stripes, 1915 to 1956
Year	Annual mean temperature	Difference from the station mean
1915	11.1 C	-0.13 C
1917	10.2 C	-1.02 C
1918	11.1 C	-0.15 C
1919	11.4 C	+0.14 C
1920	10.6 C	-0.67 C
1922	10.3 C	-0.88 C
1924	10.4 C	-0.84 C
1925	10.9 C	-0.35 C
1926	11.4 C	+0.14 C
1927	10.7 C	-0.49 C
1928	10.4 C	-0.80 C
1929	9.7 C	-1.49 C
1934	13.4 C	+2.18 C
1935	11.2 C	-0.05 C
1936	11.3 C	+0.08 C
1938	12.0 C	+0.76 C
1939	12.1 C	+0.87 C
1940	12.1 C	+0.92 C
1942	11.0 C	-0.20 C
1943	11.7 C	+0.47 C
1944	10.5 C	-0.77 C
1945	10.2 C	-1.03 C
1946	10.8 C	-0.40 C
1949	11.2 C	-0.06 C
1950	12.0 C	+0.80 C
1951	11.2 C	+0.01 C
1952	11.7 C	+0.45 C
1953	12.6 C	+1.35 C
1954	13.0 C	+1.75 C
1955	10.7 C	-0.55 C
1956	11.3 C	+0.09 C

The annual mean temperature here has risen by 0.26 C (0.03 to 0.49) per decade over 1915 to 1956. In Fahrenheit: 0.5 F (0.1 to 0.9) per decade. The slope is a straight line fitted to 31 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Lower Ameri Fork Pwhs
Measure	Per decade (C)	Per decade (F)	Period	Complete years	Reading
Annual mean temperature	0.26 C (0.03 to 0.49) per decade	0.5 F (0.1 to 0.9) per decade	1915 to 1956	31	Rise
Mean daily maximum	0.4 C (0.2 to 0.7) per decade	0.8 F (0.3 to 1.3) per decade	1915 to 1956	31	Rise
Mean daily minimum	0.1 C (-0.2 to 0.3) per decade	0.1 F (-0.3 to 0.6) per decade	1915 to 1956	31	Not clearly different from zero

A year is complete when all 12 months have at least 20 days of both daily maximum and daily minimum readings. The annual mean is the mean of the monthly means. The trend describes this one station over this period; it does not say what caused the change.

Extremes by Year

1914 to 1957

Yearly extremes at Lower Ameri Fork Pwhs: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	42.2 C (108.0 F)	1918	37.2 C (99.0 F)	44
Coldest night (TNn)	-26.1 C (-15.0 F)	1933	-17.2 C (1.0 F)	44
Wettest day (Rx1day)	60.5 mm (2.4 in)	1957	28.5 mm (1.1 in)	44
Wettest five days (Rx5day)	99.8 mm (3.9 in)	1946	47.7 mm (1.9 in)	44
Longest dry spell (CDD)	77 days	1952	34 days	44

Hottest day (TXx)

The hottest day of the year at Lower Ameri Fork Pwhs, 1914 to 1957. The record is 42.2 C (108.0 F) in 1918, marked on the chart; the median year is 37.2 C (99.0 F).

Hottest day (TXx) at Lower Ameri Fork Pwhs by year
Year	Hottest day (TXx)
1914	38.9 C (102.0 F)
1915	36.1 C (97.0 F)
1916	37.8 C (100.0 F)
1917	40.0 C (104.0 F)
1918	42.2 C (108.0 F)
1919	37.8 C (100.0 F)
1920	37.2 C (99.0 F)
1921	35.6 C (96.1 F)
1922	36.7 C (98.1 F)
1923	35.6 C (96.1 F)
1924	35.6 C (96.1 F)
1925	37.8 C (100.0 F)
1926	36.7 C (98.1 F)
1927	35.6 C (96.1 F)
1928	36.1 C (97.0 F)
1929	36.7 C (98.1 F)
1930	36.1 C (97.0 F)
1931	42.2 C (108.0 F)
1932	35.6 C (96.1 F)
1933	37.2 C (99.0 F)
1934	37.8 C (100.0 F)
1935	36.7 C (98.1 F)
1936	37.8 C (100.0 F)
1937	37.2 C (99.0 F)
1938	38.9 C (102.0 F)
1939	39.4 C (102.9 F)
1940	42.2 C (108.0 F)
1941	36.1 C (97.0 F)
1942	37.8 C (100.0 F)
1943	36.7 C (98.1 F)
1944	37.2 C (99.0 F)
1945	35.6 C (96.1 F)
1946	36.7 C (98.1 F)
1947	41.1 C (106.0 F)
1948	37.2 C (99.0 F)
1949	37.8 C (100.0 F)
1950	37.8 C (100.0 F)
1951	37.8 C (100.0 F)
1952	37.2 C (99.0 F)
1953	38.9 C (102.0 F)
1954	39.4 C (102.9 F)
1955	37.2 C (99.0 F)
1956	37.8 C (100.0 F)
1957	26.1 C (79.0 F)

Coldest night (TNn)

The coldest night of the year at Lower Ameri Fork Pwhs, 1914 to 1957. The record is -26.1 C (-15.0 F) in 1933, marked on the chart; the median year is -17.2 C (1.0 F).

Coldest night (TNn) at Lower Ameri Fork Pwhs by year
Year	Coldest night (TNn)
1914	-17.8 C (0.0 F)
1915	-17.8 C (0.0 F)
1916	-20.6 C (-5.1 F)
1917	-20.6 C (-5.1 F)
1918	-18.3 C (-0.9 F)
1919	-19.4 C (-2.9 F)
1920	-15.0 C (5.0 F)
1921	-10.6 C (12.9 F)
1922	-20.6 C (-5.1 F)
1923	-15.0 C (5.0 F)
1924	-24.4 C (-11.9 F)
1925	-11.7 C (10.9 F)
1926	-14.4 C (6.1 F)
1927	-16.7 C (1.9 F)
1928	-15.0 C (5.0 F)
1929	-21.7 C (-7.1 F)
1930	-22.8 C (-9.0 F)
1931	-20.6 C (-5.1 F)
1932	-22.8 C (-9.0 F)
1933	-26.1 C (-15.0 F)
1934	-12.8 C (9.0 F)
1935	-17.2 C (1.0 F)
1936	-15.0 C (5.0 F)
1937	-26.1 C (-15.0 F)
1938	-11.7 C (10.9 F)
1939	-16.7 C (1.9 F)
1940	-17.2 C (1.0 F)
1941	-10.6 C (12.9 F)
1942	-19.4 C (-2.9 F)
1943	-18.9 C (-2.0 F)
1944	-16.7 C (1.9 F)
1945	-13.9 C (7.0 F)
1946	-15.0 C (5.0 F)
1947	-17.2 C (1.0 F)
1948	-16.7 C (1.9 F)
1949	-21.1 C (-6.0 F)
1950	-16.7 C (1.9 F)
1951	-18.9 C (-2.0 F)
1952	-20.0 C (-4.0 F)
1953	-12.8 C (9.0 F)
1954	-11.7 C (10.9 F)
1955	-19.4 C (-2.9 F)
1956	-16.1 C (3.0 F)
1957	-16.1 C (3.0 F)

Wettest day (Rx1day)

The wettest day of the year at Lower Ameri Fork Pwhs, 1914 to 1957. The record is 60.5 mm (2.4 in) in 1957, marked on the chart; the median year is 28.5 mm (1.1 in).

Wettest day (Rx1day) at Lower Ameri Fork Pwhs by year
Year	Wettest day (Rx1day)
1914	36.3 mm (1.4 in)
1915	31.8 mm (1.3 in)
1916	56.1 mm (2.2 in)
1917	27.7 mm (1.1 in)
1918	34.3 mm (1.4 in)
1919	18.5 mm (0.7 in)
1920	25.1 mm (1.0 in)
1921	36.3 mm (1.4 in)
1922	22.6 mm (0.9 in)
1923	30.0 mm (1.2 in)
1924	22.4 mm (0.9 in)
1925	37.3 mm (1.5 in)
1926	19.1 mm (0.8 in)
1927	25.1 mm (1.0 in)
1928	18.3 mm (0.7 in)
1929	21.8 mm (0.9 in)
1930	22.9 mm (0.9 in)
1931	22.6 mm (0.9 in)
1932	31.2 mm (1.2 in)
1933	14.7 mm (0.6 in)
1934	29.2 mm (1.1 in)
1935	25.9 mm (1.0 in)
1936	33.5 mm (1.3 in)
1937	29.0 mm (1.1 in)
1938	21.1 mm (0.8 in)
1939	36.6 mm (1.4 in)
1940	25.9 mm (1.0 in)
1941	38.1 mm (1.5 in)
1942	34.0 mm (1.3 in)
1943	42.9 mm (1.7 in)
1944	34.3 mm (1.4 in)
1945	27.9 mm (1.1 in)
1946	55.4 mm (2.2 in)
1947	24.1 mm (0.9 in)
1948	19.1 mm (0.8 in)
1949	44.7 mm (1.8 in)
1950	17.8 mm (0.7 in)
1951	35.3 mm (1.4 in)
1952	39.1 mm (1.5 in)
1953	27.4 mm (1.1 in)
1954	17.0 mm (0.7 in)
1955	45.2 mm (1.8 in)
1956	22.1 mm (0.9 in)
1957	60.5 mm (2.4 in)

Wettest five days (Rx5day)

The wettest five days of the year at Lower Ameri Fork Pwhs, 1914 to 1957. The record is 99.8 mm (3.9 in) in 1946, marked on the chart; the median year is 47.7 mm (1.9 in).

Wettest five days (Rx5day) at Lower Ameri Fork Pwhs by year
Year	Wettest five days (Rx5day)
1914	61.4 mm (2.4 in)
1915	48.8 mm (1.9 in)
1916	78.8 mm (3.1 in)
1917	49.3 mm (1.9 in)
1918	96.6 mm (3.8 in)
1919	39.5 mm (1.6 in)
1920	51.0 mm (2.0 in)
1921	48.2 mm (1.9 in)
1922	38.1 mm (1.5 in)
1923	24.6 mm (1.0 in)
1924	29.5 mm (1.2 in)
1925	51.0 mm (2.0 in)
1926	39.6 mm (1.6 in)
1927	40.4 mm (1.6 in)
1928	42.9 mm (1.7 in)
1929	35.7 mm (1.4 in)
1930	55.6 mm (2.2 in)
1931	23.1 mm (0.9 in)
1932	50.0 mm (2.0 in)
1933	15.8 mm (0.6 in)
1934	55.1 mm (2.2 in)
1935	45.2 mm (1.8 in)
1936	67.8 mm (2.7 in)
1937	51.9 mm (2.0 in)
1938	42.9 mm (1.7 in)
1939	46.0 mm (1.8 in)
1940	44.3 mm (1.7 in)
1941	75.5 mm (3.0 in)
1942	38.0 mm (1.5 in)
1943	83.1 mm (3.3 in)
1944	64.7 mm (2.5 in)
1945	49.7 mm (2.0 in)
1946	99.8 mm (3.9 in)
1947	49.3 mm (1.9 in)
1948	33.8 mm (1.3 in)
1949	93.5 mm (3.7 in)
1950	40.6 mm (1.6 in)
1951	43.9 mm (1.7 in)
1952	47.2 mm (1.9 in)
1953	38.6 mm (1.5 in)
1954	28.9 mm (1.1 in)
1955	55.9 mm (2.2 in)
1956	32.5 mm (1.3 in)
1957	79.0 mm (3.1 in)

Longest dry spell (CDD)

The longest dry spell of the year at Lower Ameri Fork Pwhs, 1914 to 1957. The record is 77 days in 1952, marked on the chart; the median year is 34 days.

Longest dry spell (CDD) at Lower Ameri Fork Pwhs by year
Year	Longest dry spell (CDD)
1914	50 days
1915	34 days
1916	26 days
1917	46 days
1918	44 days
1919	40 days
1920	25 days
1921	49 days
1922	29 days
1923	18 days
1924	25 days
1925	20 days
1926	50 days
1927	28 days
1928	42 days
1929	25 days
1930	32 days
1931	63 days
1932	38 days
1933	39 days
1934	37 days
1935	56 days
1936	33 days
1937	29 days
1938	23 days
1939	76 days
1940	37 days
1941	19 days
1942	28 days
1943	42 days
1944	58 days
1945	18 days
1946	35 days
1947	25 days
1948	41 days
1949	23 days
1950	34 days
1951	27 days
1952	77 days
1953	31 days
1954	30 days
1955	36 days
1956	58 days
1957	24 days

Each chart shows one value per year; the dot marks the record year. TXx is the hottest daily maximum, TNn the coldest daily minimum, Rx1day and Rx5day the largest one-day and five-day rain totals, and CDD the longest run of days with less than 1 mm of rain. A year with missing days can understate an extreme.

Frost Dates and Growing Season

31 years with a frost

Across 31 years with a frost, the median last spring frost at Lower Ameri Fork Pwhs falls on 3 May and the median first autumn frost on 21 October, which leaves a median of 172 days between them.

Fitted over all years, the growing season changes by +1.0 days per decade at this station.

Frost dates and growing season at Lower Ameri Fork Pwhs
Measure	Median, all years	Earliest period	Recent period (1917 to 1956)	Recent against earliest	Fitted trend
Last spring frost	3 May	n/a	3 May	n/a	-0.6 days per decade
First autumn frost	21 October	n/a	21 October	n/a	+0.4 days per decade
Growing days	172 days	n/a	172 days	n/a	+1.0 days per decade

A frost day is a day with a daily minimum at or below 0 C (32 F). The last spring frost and the first autumn frost are the last and first such days of the cold season, and growing days are the days between them. A negative trend for the last spring frost means it comes earlier.

Rainfall Return Levels

34 years, 1917 to 1956

A day with at least 28.1 mm (1.1 in) of rain is expected about once in 2 years. A day with at least 58.0 mm (2.3 in) of rain is expected about once in 100 years.

Rainfall return levels at Lower Ameri Fork Pwhs: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	28.1 mm (1.1 in)
5 years	36.9 mm (1.5 in)
10 years	42.3 mm (1.7 in)
25 years	48.9 mm (1.9 in)
50 years	53.6 mm (2.1 in)	Longer than the 34 years of record
100 years	58.0 mm (2.3 in)	Longer than the 34 years of record

The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 34 years of values from 1917 to 1956.

A return level is an estimate. It is least reliable for the long periods, 50 and 100 years, and for any period longer than the record behind the fit, where the fit has to reach past the largest day actually observed. It is not a forecast.

The largest wettest-day totals in the fit: 55.4 mm (2.2 in) in 1946; 45.2 mm (1.8 in) in 1955; 44.7 mm (1.8 in) in 1949.

Download the Data

Data for Lower Ameri Fork Pwhs standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Lower Ameri Fork Pwhs threshold days by year: CSV or JSON. Field meanings are on the data page.

Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products. (US Government open data (NOAA NCEI)) Data as of 2026-10-14 (14 October 2026). Records are computed by this site and are not official.

Data as of 2025-12-31. Last revised 31 December 2025 (2025-12-31).