Cominciamo a guardare il peggioramento post-natalizio in sede previsionale, con il meteogramma centrato su Foligno.
Massa d'aria piuttosto instabile (Lifted a 0,6 molto alto per il periodo), ma sollevamenti frontali abbastanza deboli. Il settore freddo del sistema consentirà il ritorno della neve in alta collina.
Prima, una scaldata, avvertita però al di fuori delle zone pianeggianti, dove l'inversione termica sarà ancora dominante a causa dei venti deboli.
GFS#
Latitude: 42.90 Longitude: 12.70 &
DATA INITIAL TIME: 23 DEC 2017 00Z&
CALCULATION STARTED AT: 23 DEC 2017 00Z&
HOURS OF CALCULATION: 144 &
FIELD REL HUMIDITY W-WIND REL HUMIDITY W-WIND BEST 4LYR LNDE TEMPERATURE WIND DIRECTION WIND SPEED
LEVEL 850 MB 850 MB 700 MB 700 MB 850 MB 10 M 10 M
UNITS PCT HPA/H PCT HPA/H C DEGC DEG KTS
HR
+ 0. 60.7 23.5 34.4 29.3 8.2 0.8 48.5 4.7
+ 3. 67.9 22.8 24.9 30.8 8.8 0.5 61.4 4.5
+ 6. 69.6 25.4 22.9 22.5 9.1 0.5 71.5 3.5
+ 9. 58.5 23.8 36.5 7.4 8.9 1.5 70.9 3.2
+ 12. 50.3 16.8 52.9 1.2 8.5 2.6 47.2 2.3
+ 15. 44.5 14.5 53.5 1.6 8.4 3.6 9.9 0.4
+ 18. 41.4 10.7 49.2 4.8 8.2 4.4 181.6 2.1
+ 21. 40.1 6.3 42.9 4.7 7.8 4.9 188.9 2.1
+ 24. 36.2 5.9 37.8 5.6 7.8 5.5 199.9 2.1
+ 27. 35.1 5.7 35.0 4.4 8.0 5.6 214.6 2.0
+ 30. 33.6 6.6 31.2 3.7 8.3 5.9 215.7 2.6
+ 33. 32.0 6.2 28.0 0.6 8.3 6.2 220.6 2.9
+ 36. 33.8 4.4 24.8 2.8 8.2 6.1 276.3 3.4
+ 39. 34.3 8.2 19.7 0.0 8.4 6.1 247.1 2.7
+ 42. 31.5 9.7 15.2 0.0 8.4 6.5 222.5 3.2
+ 45. 30.3 8.9 12.4 0.0 8.4 6.8 231.2 2.3
+ 48. 29.0 6.2 12.4 -3.1 8.2 6.9 228.5 2.2
+ 51. 31.1 4.2 14.5 -3.1 8.1 6.4 226.2 2.4
+ 54. 34.6 4.3 14.6 0.0 8.2 5.8 210.1 2.8
+ 57. 37.8 2.3 15.1 -0.3 8.4 5.2 222.4 2.9
+ 60. 44.9 1.6 17.5 0.3 8.3 4.3 235.4 3.2
+ 63. 55.7 0.5 18.2 -1.1 8.0 3.6 223.2 2.8
+ 66. 59.1 3.7 18.1 -3.5 7.8 3.2 199.6 3.8
+ 69. 57.7 -1.2 20.9 -4.2 7.5 3.1 197.6 4.3
+ 72. 62.1 0.6 26.8 -2.5 6.9 2.5 194.2 4.6
+ 75. 84.4 5.3 40.2 -1.8 5.9 1.6 189.1 4.7
+ 78. 81.6 4.7 50.2 1.9 5.2 1.8 186.9 4.6
+ 81. 78.5 1.9 56.6 -0.5 4.4 1.8 197.9 5.0
+ 84. 92.8 -0.0 58.3 5.5 2.5 1.6 208.7 6.3
+ 87. 87.8 3.8 43.5 5.6 1.8 1.8 198.9 6.2
+ 90. 82.6 6.3 32.3 8.1 1.8 1.9 190.1 6.2
+ 93. 83.3 11.6 66.8 5.0 2.1 1.9 184.8 6.0
+ 96. 80.3 12.9 63.0 7.6 2.7 2.1 182.2 7.1
+ 99. 91.2 15.7 79.9 9.8 2.5 1.7 183.3 8.1
+102. 89.9 20.7 89.4 17.4 2.1 1.9 180.2 7.6
+105. 88.4 18.0 93.3 21.6 1.8 2.3 186.9 10.6
+108. 97.9 -1.3 96.7 1.7 1.5 2.5 201.5 11.7
+111. 97.6 -20.7 98.2 -19.2 1.9 2.2 209.7 9.4
+114. 99.1 0.2 97.5 14.3 2.2 1.8 204.1 8.9
+117. 94.9 -12.9 95.6 -5.7 0.6 2.0 226.0 8.3
+120. 87.5 5.7 85.5 36.3 1.4 0.5 227.9 6.0
+123. 89.5 -5.3 65.1 11.3 1.4 0.4 224.0 8.3
+126. 95.4 -3.6 82.8 12.7 1.5 -0.6 243.3 7.5
+129. 90.0 -9.5 87.1 -22.5 1.2 -0.6 255.6 5.4
+132. 95.6 -6.5 81.6 -21.6 1.7 -0.7 294.1 4.3
+135. 96.1 -12.9 87.6 -1.5 3.5 -1.4 7.9 6.3
+138. 88.2 11.5 79.6 22.6 4.6 -2.0 42.7 6.8
+141. 79.5 21.7 74.2 11.3 5.7 -1.8 53.7 5.0
+144. 73.2 22.7 59.2 16.6 6.5 -1.9 61.1 4.9

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qui si va incontro ad una fase quasi ottobrina, altro che pausa invernale 


































