Intanto vorrei analizzare la situazione riportando il meteogramma di Perugia:
GFS
Latitude: 43.04 Longitude: 12.19
DATA INITIAL TIME: 03 FEB 2012 00
CALCULATION STARTED AT: 03 FEB 2012 00Z
HOURS OF CALCULATION: 192
FIELD MSL PRESSURE TEMPERATURE DEW POINT TEMPERATURE THICKNESS HEIGHT PRECIPITATION
LEVEL 2M 2M 850 MB 500 MB 500 MB
UNITS HPA DEGC DEGC DEGC DM DM MM
HR
+ 0. 1013.7 -2.7 -3.9 -6.2 528.3 539.5 0.79
+ 3. 1012.8 -2.9 -4.5 -6.0 528.5 539.0 1.04
+ 6. 1012.4 -3.7 -5.5 -6.9 528.6 538.8 0.00
+ 9. 1012.7 -2.8 -5.7 -7.0 529.2 539.4 0.22
+ 12. 1012.2 -1.7 -5.2 -8.4 530.3 539.7 0.22
+ 15. 1011.4 -3.4 -5.1 -8.4 529.7 538.9 1.87
+ 18. 1011.2 -4.4 -5.0 -8.7 529.3 538.6 4.63
+ 21. 1010.5 -4.1 -4.9 -8.2 529.5 538.2 2.61
+ 24. 1010.4 -4.5 -5.3 -9.5 529.1 538.0 2.37
+ 27. 1009.9 -4.7 -5.4 -9.2 528.3 536.7 1.74
+ 30. 1010.2 -5.2 -6.0 -10.0 527.2 536.2 1.38
+ 33. 1011.5 -3.6 -4.9 -10.2 527.2 536.7 0.43
+ 36. 1012.6 -3.0 -4.8 -10.5 526.3 536.4 1.55
+ 39. 1013.4 -3.5 -4.8 -9.7 524.9 535.9 0.61
+ 42. 1014.7 -5.3 -6.0 -9.0 523.0 535.4 0.26
+ 45. 1016.3 -6.0 -6.6 -8.1 521.3 534.9 0.27
+ 48. 1017.8 -6.9 -7.6 -8.5 519.6 534.4 0.27
+ 51. 1018.3 -7.6 -8.3 -8.6 518.7 533.8 0.46
+ 54. 1019.4 -7.3 -8.2 -8.6 518.7 534.6 0.46
+ 57. 1020.1 -3.7 -5.1 -8.6 519.5 535.4 0.37
+ 60. 1019.3 -1.0 -2.6 -8.0 520.6 535.2 0.00
+ 63. 1018.3 -1.2 -2.5 -7.2 521.1 535.2 0.39
+ 66. 1018.2 -4.7 -5.3 -6.8 521.3 535.7 0.41
+ 69. 1018.0 -5.6 -6.2 -6.8 521.1 535.6 0.36
+ 72. 1017.0 -6.1 -6.6 -6.7 521.1 535.1 0.40
+ 75. 1015.9 -5.8 -6.2 -7.2 521.1 534.2 0.21
+ 78. 1015.7 -5.7 -6.3 -7.1 521.1 534.1 0.19
+ 81. 1015.6 -3.1 -4.2 -7.4 521.8 534.5 0.00
+ 84. 1014.7 -2.0 -4.0 -8.1 522.7 534.5 0.06
+ 87. 1013.2 -3.5 -4.9 -8.2 523.6 534.4 0.00
+ 90. 1013.3 -6.4 -7.0 -9.6 524.3 535.6 0.22
+ 93. 1012.7 -7.1 -7.6 -10.0 525.4 536.2 0.03
+ 96. 1011.7 -6.6 -7.3 -10.6 526.6 536.3 0.21
+ 99. 1010.0 -5.5 -6.3 -9.8 528.2 536.2 0.06
+102. 1010.1 -4.4 -5.1 -8.5 528.8 536.8 0.81
+105. 1011.0 -2.0 -3.4 -7.9 529.2 537.6 0.25
+108. 1011.6 -1.1 -2.8 -8.6 529.4 538.5 0.25
+111. 1012.0 -1.4 -2.8 -8.7 529.8 539.3 0.24
+114. 1013.4 -2.9 -3.7 -8.2 529.6 540.5 0.24
+117. 1015.0 -3.5 -4.1 -7.7 529.8 541.9 0.21
+120. 1016.2 -4.3 -4.9 -7.2 529.7 542.8 0.00
+123. 1017.0 -4.5 -5.1 -7.1 528.9 542.7 0.10
+126. 1018.8 -4.4 -4.9 -7.4 528.1 543.2 0.10
+129. 1021.0 -1.5 -2.7 -5.9 528.0 544.6 0.03
+132. 1021.7 0.3 -1.1 -4.9 528.3 545.4 0.00
+135. 1022.4 0.3 -1.1 -4.5 528.7 546.5 0.03
+138. 1023.8 -2.8 -3.5 -3.7 528.5 547.7 0.00
+141. 1025.5 -3.7 -4.3 -3.7 527.9 548.5 0.00
+144. 1026.3 -3.9 -4.4 -4.7 527.7 548.7 0.00
+147. 1026.4 -3.8 -4.3 -5.0 527.4 548.5 0.00
+150. 1027.0 -4.0 -4.6 -4.6 527.4 549.0 0.00
+153. 1027.8 -1.4 -2.8 -3.8 527.8 549.7 0.00
+156. 1027.3 0.1 -1.7 -3.6 528.0 549.7 0.00
+159. 1026.5 -0.4 -2.0 -3.5 528.2 549.3 0.00
+162. 1026.9 -4.3 -5.1 -3.2 528.0 549.6 0.00
+165. 1027.5 -5.2 -6.0 -3.6 527.4 549.6 0.00
+168. 1027.5 -6.5 -7.3 -3.9 526.7 549.2 0.00
+171. 1027.0 -5.9 -6.7 -3.8 526.6 548.4 0.00
+174. 1027.5 -5.6 -6.3 -3.8 526.5 548.8 0.00
+177. 1028.9 -1.6 -3.4 -3.6 526.9 550.2 0.00
+180. 1029.1 0.4 -1.6 -3.7 527.5 550.8 0.00
+183. 1029.3 0.2 -1.7 -3.3 528.0 551.5 0.00
+186. 1030.7 -3.0 -3.8 -3.1 527.8 552.8 0.18
+189. 1032.3 -3.8 -4.4 -4.1 527.4 553.5 0.00
+192. 1033.8 -3.8 -4.4 -5.4 526.9 554.2 0.18
GFS00 sentenzia che anche Perugia è dentro. Le prcp non saranno a carattere temporalesco o di forte entità, come accadrà da Todi in giù, con accumuli su Ternano e Orvietano anche superiori ai 20 cm. Tendo però a sottolineare come con una -8 abbondante sia previsto precipitare: ciò permetterebbe accumulo anche in assenza di forti rovesci, alla fine non mi sentirei di escludere perugino (e ovviamente anche folignate) da un 5-10 cm.
Se la pensate diversamente, sono qui per imparare e mi farebbe piacere sapere cosa ne pensate