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April 2023


Rtd208
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Todd bin readin my thread on Central/Western forum. I was going to post that info, generally speaking in the 90s all over SD except over that remnant of the long-duration winter snow pack. In ND the contrast is similar, from 88F in southwest to low 40s in eastern sections. The warmth is being pumped up by a low that gave my location over 1.5" of rain in past 24h, leading to some minor flooding with combined rain and snow melt. Snow around here was 2-3 feet a few weeks ago, has been largely eliminated by this rainfall below our elevation and reduced to a foot or so outside town here, still 2 feet in the alpine though. 

I would say your temperatures are likely to be 86F tomorrow, 91F on Thursday, 93F on Friday, 77-82F on Saturday and Sunday with more cloud and thundershowers around and a more noticeable sea breeze in places, and falling back to 60s on Monday. Looks like a fairly active cold front for late Sunday there. 

If you took a 1941-1977 blend for a long-range forecast that would say very warm most of the spring and early summer, not as hot by mid to late August, resumed warmth in September and parts of October. Both 1941 and 1977 were near record warm in parts of May, June and July. 

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1 minute ago, Roger Smith said:

Todd bin readin my thread on Central/Western forum. I was going to post that info, generally speaking in the 90s all over SD except over that remnant of the long-duration winter snow pack. In ND the contrast is similar, from 88F in southwest to low 40s in eastern sections. The warmth is being pumped up by a low that gave my location over 1.5" of rain in past 24h, leading to some minor flooding with combined rain and snow melt. Snow around here was 2-3 feet a few weeks ago, has been largely eliminated by this rainfall below our elevation and reduced to a foot or so outside town here, still 2 feet in the alpine though. 

I would say your temperatures are likely to be 86F tomorrow, 91F on Thursday, 93F on Friday, 77-82F on Saturday and Sunday with more cloud and thundershowers around and a more noticeable sea breeze in places, and falling back to 60s on Monday. Looks like a fairly active cold front for late Sunday there. 

If you took a 1941-1977 blend for a long-range forecast that would say very warm most of the spring and early summer, not as hot by mid to late August, resumed warmth in September and parts of October. Both 1941 and 1977 were near record warm in parts of May, June and July. 

Cheyenne also recorded its earliest 80-degree reading on record.

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Walpack, NJ made it up to 76 from a low of 27.  The 27 was the state low and the high of 76 tied four other NJ stations for the state high.

My home hydrometer made it down to 13% this afternoon.  Amazing weather, however, we will start begging for rain soon if the dry conditions persist.

Looks like they're having some interesting conditions in the upper mid-west too.

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Temperatures rose into the middle and upper 60s today. Even warmer weather lies ahead.

From the Southwest to Northern Plains, exceptional heat prevailed. High temperatures included:

Cheyenne: 80° (old record: 73°, 1982 and 1998)
Denver: 85° (old record: 80°, 1982)
Phoenix: 99° (old record: 98°, 1989)
Rapid City: 87° (old record: 85°, 1985)
Salt Lake City: 83° (old record: 80°, 1934)
Scotts Bluff, NE: 92° (old record: 85°, 1916 and 1985)
Tucson: 99° (old record: 95°, 1907, 1988, and 2018)

Some of this warmth will spill over into the East to end the week. Temperatures could reach the middle 80s by late in the week, possibly challenging or breaking some record highs on Friday.

Overall, warmth appears likely to define April in much of the East. If the long-range guidance is accurate the first three weeks of the month could put April 2023 on a trajectory that could rank it among the 10 warmest Aprils on record in the northern Middle Atlantic region. Afterward, the latest EPS weeklies suggest that the month could finish with near normal readings.

The most recent April case to rank among the 10 warmest was:

Boston: 51.7°, 2019 (5th warmest)
Bridgeport: 54.0°, 2017 (1st warmest)
Islip: 51.9°, 2019 (6th warmest)
New Haven: 50.8°, 2022 (6th warmest)
New York City-Central Park: 57.2°, 2017 (2nd warmest)
New York City-JFK Airport: 55.1°, 2017 (2nd warmest)
New York City-LaGuardia Airport: 57.6°, 2017 (2nd warmest)
Newark: 57.2°, 2017 (4th warmest)
Philadelphia: 59.0°, 2019 (3rd warmest)
Poughkeepsie: 53.0°, 2017 (3rd warmest)
White Plains: 53.9°, 2017 (2nd warmest)

The ENSO Region 1+2 anomaly was +2.7°C and the Region 3.4 anomaly was 0.0°C for the week centered around April 5. For the past six weeks, the ENSO Region 1+2 anomaly has averaged +1.77°C and the ENSO Region 3.4 anomaly has averaged -0.03°C. Neutral ENSO conditions will likely prevail through at least mid-spring. El Niño conditions will likely develop during the summer.

The SOI was +0.43 today.

The preliminary Arctic Oscillation (AO) was +1.473 today.

On April 9 the MJO was in Phase 6 at an amplitude of 1.717 (RMM). The April 8-adjusted amplitude was 1.477 (RMM).

Based on sensitivity analysis applied to the latest guidance, there is an implied 89% probability that New York City will have a warmer than normal April (1991-2020 normal). April will likely finish with a mean temperature near 57.4° (3.7° above normal). That would rank as the second warmest April on record.

 

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Some other records and other readings to add to Don's earlier list: 

Pierre SD 94F (old record 84F 1968) 

Huron SD 92F (old record 84F 1931)

Mitchell SD 90F (old record 89F 1968)

Mobridge SD 90F (old record 88F 1911)

Hettinger ND 89F (records not shown)

Miles City MT 88F (old record 84F 1949)

Rapid City (A) 87F (old record 85F 1985)

Sioux Falls SD 87F (record 88F 1985 survived)

Dickinson ND 83F (record 81F 1949)

MSP MN 81F (record 83F 1949, 1968 survived) _ zero snow on ground now

Williston ND 80F (records not shown)

Glasgow MT 80F (record 83F 1949 survived)

Minot ND 72F (record 81F 1949) _ late afternoon, probably most snow gone by then

__________

meanwhile held down by snow cover

Bismarck ND 58F _ at 6 p.m., snow cover reduction overcoming diurnal cooling

Jamestown ND 54F _ at 5:20 p.m., same as above

Fargo ND 54F

Aberdeen SD 49F _ deeper snow cover in region

Grand Forks ND 43F

 

 

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The next 8 days are averaging    66degs.(59/73) or +12.

Month to date is     54.0[+4.0].       Should be      59.1[+7.4] by the 20th.

Reached 71 here yesterday at 3pm.

Today:   75-81, wind w.- breezy, p. sunny,  65 tomorrow AM.

63*(40%RH) here at 7am{was 60 at 4am).     65* at 8am.     66* at 9am.      68* at 10am.     70* at 11am.      72* at Noon.      75* at 1pm.        80* at 3pm.       82*(27%RH) at 4pm.      83*(26%RH) at 4:15pm.       84*(25%RH) at 5pm.      85* at 5:15pm.      86*(24%RH) at 5:30pm.        80* at 8pm.

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Final edge of clouds pushing north to south and we should clear in the next two hours.  Low of 55 and now up to 68 already.  Low / mid 80s and likely some overperformers full sun / recent dryness.  First hot at 90s  since Sep and April 90s a while (2010 / 12).  Weekend looks cloudy / wet as gulf moves along trough into east.  Cooler April 17 - 21 and then back and forth warm / normal to below bias; warmer than normal overall.  Could be a couple of day /or two strong warmth the next two weeks.

 

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