Pilot balloon data / Network
Number of observations per month
1-14 15-29 30-44 >= 45
19971998199920002001200220032004200520062007  
JFMAMJJASONDJFMAMJJASONDJFMAMJJASONDJFMAMJJASONDJFMAMJJASONDJFMAMJJASONDJFMAMJJASONDJFMAMJJASONDJFMAMJJASONDJFMAMJJASONDJFMAMJJASOND  
P01 Salina_Cruz    10 20 36 43 53 46 52   9 31 42 39 60 28 36 25 49 51    28 56 59 61         7 58 57 53 52 56 56 52 54 53 60 53 52 20 51 42 31 14 44 35 56 56 55 42  32 51 23 36 53 52 44 55 49 58 49 44 37 45 42 24 14 11 26 43 53 16  38 58 50 58 15 11 50 48 51 53  59 17   33                 25 37 53   11          3467P01 Salina_Cruz (MEX)
P02 Puerto_Madero    9 22 32 39 45 40 52   5 21 38 13 37 11 35 14 11                  56 49 28 57 60 62 3 50 54 55 32 16 13 6 7 4 13 28 36 49 27 36 35 40 42 20 8 6 6 15 4 36 24 27 30 4  25    10 20 11 36 23 32   40 22 11 17 10 9 3 25 10 8 15 12 6 5                                1812P02 Puerto_Madero (MEX)
P03 Frontera    5 22 41 41 51 44 48   9 34 44 43 61 59 61 61 49 57    22 62 55 61                                                                                                        930P03 Frontera (MEX)
P55 Puerto_Penasco                              28 55 48       46 34 32 47 48 21  34 50 46 10 30 29 22 44 38 38 39 30 5 21 26 13 7 28  11 28 33 44 16 8 16 25 27 26 26 25 24 29 50 39 24 42 39 33 30 29 38 30 32 28 38 35 29 29 24 28 7 14 29 18 27 24 25 21 22 10 3                          2004P55 Puerto_Penasco (MEX)
P56 Topolobampo                                       13 60 26 12 62 59 29 44 51 54 60 47 7 33 46 49 15 47 47 54 53 43 59 51 59 56 50 52 56 52 57 60 57 57 55 37 52 45 57 21 36 56 52 48 54 58 52 33 39 57 62 59 49 58 50 51 46 49 11    53 53 50 49 50 57 52 39 39 40 17 33 17 51 16 30 38 43 52 28  1           3572P56 Topolobampo (MEX)
P57 Tampico                                      7 48 56 52 53 59 51 48 55 52 55 57 46 57 49 54 54 49 51 48 50 54 52 47 29 46 41 51 46 51 53 49 46 39 33 45 31 35 31 42 47 45 55 51 55 60 55 52 57 57 55 60 57 54 50 48 26 53 51 48 39 55 52 44 35  23 41 9 14 17 25  22 45 3 23 36 18 20                3429P57 Tampico (MEX)
P58 Cd_Carmen                                       54 59 30 13 53 54 54 53 51 46 52 46 59 56 56 51 49 46 48 46 37 43 44 33 52 59 59 37 39 54 39 56 48 33 44 49 50 43 49 46 54 52 55 47 55 51 56 52 61 39 57 55 56 60 59 57 58 57 61 51 15  27 57 57 52 54 19 22 4 41 32 26 41 7                    3437P58 Cd_Carmen (MEX)
P59 Veracruz                                                                13 27 21 24 15 22 34 36 37 18 25 46 37 30 5 14 27 41 54 41 56 37 12 46 44 44 46 48 51 51 44 41 43 30 4 17 17 43 49 45 16 27 40 53 44 40 34 32 37 47 33 31 3        10 18 22 4      1826P59 Veracruz (MEX)
P04 Managua    37 26 29 48 51 55 49 29 31 29 28 31 30 24 28 19 31 2             22 25 29 30 7  17 30 19 56 52 40 49 48 38  49 55 16   55 55 56 55 51 61 43 26 60 50 33 25 47 47 46 54 44 57 18                16 24 25 19 22 12 24 20 23 25 30 27 23 23 27 19 13             28 23 10  18 29 30 29 21 25 11 3    2641P04 Managua (NICARAGUA)
P05 Liberia    27 30 34 42 32 23 21 28 22 34 28 24 25                                                                                                                     370P05 Liberia (COSTA-RICA)
P06 Cocos     28 25 28 23 13 15 4      25       11 8                                                                                                            180P06 Cocos (COSTA-RICA)
P07 David           4 26 30 27 29 26 20 45 28 10   1  10  13 20 5 12 1       25 30 22 15 21 23 20 10 22 18 25 16 11 29 29 30 30 30 30 28 25 23 19                                                                         838P07 David (PANAMA)
PLS Los_Santos     15 50 52 46 36 39                                                                                                                           238PLS Los_Santos (PANAMA)
P08 Cartagena      21 43 40 23 27 13 11 14 16 16  8 13 12 6 4 11 8 15 15 12 7 5  2 2        18 9 16 20 16 19 17 17 17 11 12 17 4 8 4 7 19 20 21 12 4 6 11 6 8 6 7 1  3 10 2 1  3 10 13 7 7  6 8 12 9 10 16 13 13 22 10 15 11 11 5 12 11 5 2 11 1                                   936P08 Cartagena (COLOMBIA)
KBQ Barranquilla                                                                                                         39 35 24 33 14       10 10 13 19  1 5           203KBQ Barranquilla (COLOMBIA)
KPQ Puerto_Salgar                                                                                                         31 19 25 26 28 19 20 18 23 22 24 18 12 21 22 11  1           340KPQ Puerto_Salgar (COLOMBIA)
KGB Cali                                                                                                         41 28 28 35 36 26 37 24 38 32 29 21 14 18 22   8           437KGB Cali (COLOMBIA)
KAP Apiay                                                                                                         24 29 29 46 32 30 27 33 7 15 29 18 9 20 12  1 12           373KAP Apiay (COLOMBIA)
KTQ Tres_Esquinas                                                                                                         11 21 17 24 15 18 23 13 6 10 17 14 16 18 16 18  8           265KTQ Tres_Esquinas (COLOMBIA)
KUA Marandua                                                                                                         11 33 19 29 19 17 21 12 18 12 7 11 9 15 16   8           257KUA Marandua (COLOMBIA)
VIA Isla_de_Aves                                                                                                          12 6  6 3  4 4 3 4                  42VIA Isla_de_Aves (VENEZUELA)
VGD Guasdualito                                                                                                         3 26 8 1  3 4 1                     46VGD Guasdualito (VENEZUELA)
P60 San_Fernando                                                   21 29 31 25 23 31 19 20 28 30 25 28 31 30 31 17 31 31 29 27     15 29 29 30 25 31 30 20 2 21 31 29 31 30 30 13  19 7 29 29 31 21 43 31 34 31 30 31 26 26 30 14  31 15 24 19 7 12 11 8                 1492P60 San_Fernando (VENEZUELA)
P62 Cd_Bolivar                                                               8 20 4 15 16 28 22 24 18 11  12 28 23 8 6 10 16 10 5 3 23 28 24 24 19 11 3  7 15 4    19 11                                  475P62 Cd_Bolivar (VENEZUELA)
P80 Maracay                                                                                      1 47 40 29 6  1 15 17 10 7 24 40 29 45 36 20 20 45 31 15 12 13 24 24 24 23 12 14 12 8                 644P80 Maracay (VENEZUELA)
P00 Porto_viejo           15 27 13 2                                                                                                                       57P00 Porto_viejo (ECUADOR)
P10 Esmeraldas        59 37 33 20 13 20 5  20 21 27 24 20 11                                                                                                                310P10 Esmeraldas (ECUADOR)
P11 Guayaquil       54 53 50 41 26 15 15 5 37 7 7 7 25 21 19 16 18 25 19 11 17 18 18 10 10 6 13 10 17 11 12 10 8 13 5 16 11 17 17 10 15 13 4 6 6 9 13 18 18 12 15 17 12 10 12 2 4 9 16                                            1                        932P11 Guayaquil (ECUADOR)
P12 Galapagos      17 47 50 37 33 45 42 46 34 41 16 21 7 27 24 4  1 22 18 12 15 5 10      6 7 1 19 20 18 20 20 18 5 4 2 13 15  7 18 13 7 8 5  1      25 16 24 20 18 11 6 16 9 11 12 3 26 24 17 17 21 5 9 14 13 18 20 23 21 20 14 15 16 10 8  1                                      1284P12 Galapagos (ECUADOR)
P18 Ancon            14 24 15 48 23 28 29 6                                                                                                                  187P18 Ancon (ECUADOR)
P24 Izobamba                                                                19 20 19 24 22 11                                                                115P24 Izobamba (ECUADOR)
P13 Piura     21 28 51 54 55 51 26 10 41 50 40 53 46 30 25 32 30 29 19 25 26 26 25 28 12       6 39 33 60 29 31 30 31 30 30 31 29 31 31 27 28 28 31 30 31 31 28 28 30 31 18 5 24 28 29 30 29 30 24 28 22 24 31 27 31 30 29 20 28 24 30 30 30 30 31 28 27 30 27 27 29 31 30 31 27 14 11 17 29 29 29 23 26 30 23 25 24 21 29 27 29 29 23 28 29 30 26 29 25 23 28 27 29 3         3261P13 Piura (PERU)
P14 Tumbes             25 25 34 17 30 22                                                                                                                   153P14 Tumbes (PERU)
P15 Trujillo            8 31 27 57 30 28 30                                                                                                                   211P15 Trujillo (PERU)
P16 Ancon2             26 26 30 28 30 14                                                                                                                   154P16 Ancon2 (PERU)
P17 Iquitos              8 46 20 25 24 20 27 14                                                                                                                184P17 Iquitos (PERU)
P21 Chiclayo               58 28 31 30                                                                                                                   147P21 Chiclayo (PERU)
P26 Pucallpa                                                                        32 44 26                   16 27 27 5                                     177P26 Pucallpa (PERU)
P27 Ica                                                                       32 46 43 17                                                           138P27 Ica (PERU)
P28 Puno                                                                       23 44 37 13                                                           117P28 Puno (PERU)
P29 Arequipa                                                                       32 60 59 44 1    17 31 29 28 29 31 23 21 24 29 31 29 28 23 24 28 26 27 26 22 31 29 31 2     0     40 45 49 49 46 36 46 21              1147P29 Arequipa (PERU)
PQT Iquitos                                                                                            4 10 12 12 12 6              5 6 5 9 5 5 6 4 4 2 2 8 3 3 1        124PQT Iquitos (PERU)
PTU Puerto_Maldonado                                                                                             9 6 6 13 6 2            6 3 9 10 4 10 13 5 4 7  7 4  2 10 2       138PTU Puerto_Maldonado (PERU)
BCS CruzeiroDoSul                                                                         69 54                                                           123BCS CruzeiroDoSul (BRAZIL)
BDO Dourados                                                                         84 20                                                           104BDO Dourados (BRAZIL)
BRB Rio_Branco                                                                        33 68 86                                                           187BRB Rio_Branco (BRAZIL)
BVI Vilhena                                                                         128 104                                                           232BVI Vilhena (BRAZIL)
P20 Santa_Cruz             39 36 15          14 26 15                  2 11 13 2 9 14 16 24 7 10  18 9 19 10 13 10 6 16 14 14 6 3   8 26 26 68 24 8 7 16 15 5  18 1  10 18 16 7                                              664P20 Santa_Cruz (BOLIVIA)
P70 Cobija                                           5 7 8 19 12  15 10 6   21 9 27 25 18 12 10 12 11   11 13 26 14   35 38 32 21 11 8 23 19 23 26 21 13 16 13 13 6                                               609P70 Cobija (BOLIVIA)
P71 Trinidad                         36 50 42 54 3         1     6 13 3 26 18 15 15 14 13 17 18 19 19 21 23 21 15 13 18 13 18  22 22 6   4 38 8 23 89 4 15 22 13 27 21 18 23  7 4 3 3                                              896P71 Trinidad (BOLIVIA)
P72 La_Paz                         1 37 35 28            1    2 27 28 26 14 15 15 12 14 26 8 15 29 26 26 26 22 25 19 19 8 28 27 24 15  8 41 50 14 46 7 19 31 28 24 28 27 25 25 15 8 12 7                                              1013P72 La_Paz (BOLIVIA)
P73 Robore                         48 54 51 12                  19 14 16 13 15  11 12 4 3 27 20 8 14 17 18 9 23  19 16 11    27  25 4    19 27 18 7                                                    581P73 Robore (BOLIVIA)
P74 Uyuni                          1 49 57 28                 15 27 19 24  4 6 18 5 2 28 22 30 26 23 19  24  26 26 25 2  7 35 35 18 35 17 21 26 29    23 16 22                                                 790P74 Uyuni (BOLIVIA)
P77 Villamontes                                                                        25 19 23                                                           67P77 Villamontes (BOLIVIA)
P30 Asuncion                                   15 25 20 4 14 22 12 11 26 17 11 21 26 25 30 23 22 20 20 23 20 15 18 23 16 24 18 22 22 21 17 15 19 25 15 7 38 53 107 52 8 8 25 21 8 22 21 26 25 22 31 25 27 24 19 21 20 20 13 4   19 23 25 20 19 16 21 14 12                            1493P30 Asuncion (PARAGUAY)
P32 Estigarribia                                   10 21 23 5   8 6 15 7 7 11 11 10 19 12 16 15 16 21 13 12 1 22 15 23 20 20 19 16 18 9 20 22 17 4 18 52 75 48        26 24 24 30 23 26 6 19 16 2 23     16 11 20 17 19 15 24 22 15                            1055P32 Estigarribia (PARAGUAY)
CBA Cordoba                                                                       14 25 111 83                                                           233CBA Cordoba (ARGENTINA)
CHA Chamical                                                                       41 56 111 74                                                           282CHA Chamical (ARGENTINA)
JVG Joaquin_V_Glez                                                                       22 30 90 61                                                           203JVG Joaquin_V_Glez (ARGENTINA)
PAM Pampa_Guanacos                                                                       26 47 129 93                                                           295PAM Pampa_Guanacos (ARGENTINA)
PAR Parana                                                                       28 48 142 75                                                           293PAR Parana (ARGENTINA)
SIS Resistencia                                                                       29 52 100 58                                                           239SIS Resistencia (ARGENTINA)
SGO Santiago_Estero                                                                       32 45 96 58                                                           231SGO Santiago_Estero (ARGENTINA)
TOS Tostado                                                                       22 37 132 77                                                           268TOS Tostado (ARGENTINA)
JFMAMJJASONDJFMAMJJASONDJFMAMJJASONDJFMAMJJASONDJFMAMJJASONDJFMAMJJASONDJFMAMJJASONDJFMAMJJASONDJFMAMJJASONDJFMAMJJASONDJFMAMJJASOND  
Obs
Stns		   88
5		184
8		313
10		488
11		557
12		459
12		461
12		210
10		219
11		410
17		418
18		630
17		418
16		502
17		404
16		318
12		271
11		193
10		164
5		47
5		98
5		195
10		279
11		387
12		341
11		198
8		52
4		68
4		54
2		13
1		32
2		73
5		99
6		125
6		118
10		425
12		446
14		358
14		377
14		545
16		492
17		362
17		571
20		598
20		550
19		467
18		457
19		435
20		456
20		482
19		456
20		440
20		611
20		556
21		584
20		530
20		557
20		489
19		327
17		560
20		477
18		548
23		487
22		561
21		535
19		411
16		484
19		922
31		1215
32		2156
36		1553
36		415
18		442
18		477
17		389
17		434
18		480
18		501
19		543
20		531
18		544
20		509
18		445
19		565
18		523
16		546
17		436
17		404
14		476
18		475
19		442
18		467
17		369
15		387
17		343
16		334
13		294
11		420
14		347
12		326
10		317
11		474
18		408
16		350
16		332
13		380
15		294
14		314
15		387
17		272
16		317
15		309
15		253
15		201
12		284
13		276
13		145
7		39
5		100
11		72
4		48
5		58
4		45
3		29
2		11
1		3
1		    48948 Obs
Stns
19971998199920002001200220032004200520062007 Last updated: 11/24/2009