Station report
Catalina, in 5 sheets Drawn from its report of Oct 11, 2026, 1:17 AM local time, in the manner of the Field Book, and opened beside the plates that explain each part of it.
1 The air2 The wind3 The column4 The sun5 The instrument76.0 F with a dew point of 74.7 F, 96 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 300 ft up.
Chart of the air at Catalina: temperature 76.0 degrees Fahrenheit and dew point 74.7, 96 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 300 feet above the station; height to scale. 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 A A B B C C D D E E © 2026 STORM STATION 247 THE FIELD BOOK STATION REPORT CTAP4 FIG. B THE AIR AT CATALINA THE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALE FT ABOVE THE STATION 0 1,000 2,000 3,000 60 F 70 F 80 F 90 F SATURATES 300 FT ABOVE THE STATION, AT 74.4 F TEMPERATURE AND DEW POINT 76.0 F, 74.7 F RELATIVE HUMIDITY 96 PER CENT THE AIR COOLS ABOUT 5.4 F EACH 1,000 FT IT RISES, AND ITS DEW POINT ABOUT 1 F SOLID: THE LIFTED AIR'S TEMPERATURE; DASHED: ITS DEW POINT TITLE Catalina, the air STATION REPORT · DCP CTAP4 TYPE CHART SCALE HEIGHT TO SCALE REV AS REPORTED SHEET 1 of 5 DATE 2026-10-11 ID SR-CTAP4-1 DRAWN AS linework on paper SOURCES FB-WAT-020, FB-WAT-002, FB-ENG-011, FB-ENG-005 From the southeast (132 degrees) at 1 mph, gusting 5 mph: force 1, a light air on the Beaufort scale. The strongest gust today was 5 mph.
Plan of the wind at Catalina, north up: blowing from 132 degrees, the southeast, at 1 miles an hour, gusting 5; beside it the Beaufort scale from calm to hurricane force, force 1, light air, marked. 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 A A B B C C D D E E © 2026 STORM STATION 247 THE FIELD BOOK STATION REPORT CTAP4 FIG. C THE WIND AT CATALINA PLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALE N E S W THE STATION FROM 132° BEAUFORT FORCE LEAST WIND, MPH 0 CALM 0 1 LIGHT AIR 1 NOW, 1 MPH 2 LIGHT BREEZE 4 GUST, 5 MPH 3 GENTLE BREEZE 8 4 MODERATE BREEZE 13 5 FRESH BREEZE 19 6 STRONG BREEZE 25 7 NEAR GALE 32 8 GALE 39 9 STRONG GALE 47 10 STORM 55 11 VIOLENT STORM 64 12 HURRICANE FORCE 73 TITLE Catalina, the wind STATION REPORT · DCP CTAP4 TYPE PLAN north up SCALE NOT TO SCALE REV AS REPORTED SHEET 2 of 5 DATE 2026-10-11 ID SR-CTAP4-2 DRAWN AS linework on paper SOURCES FB-EVT-150, FB-ENG-008 At 384 ft above sea level, 1 per cent of the atmosphere's air lies below the station. The standard atmosphere puts the pressure there at 29.51 inHg and the temperature at 57.6 F; it reports 76.0 F, 18.4 F warmer than standard.
Section from sea level of where Catalina stands in the atmosphere, height to scale: the station 384 feet above sea level with 1 per cent of the air below it; the standard atmosphere's pressure there, 29.51 inches of mercury, and temperature, 57.6 degrees Fahrenheit. 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 A A B B C C D D E E © 2026 STORM STATION 247 THE FIELD BOOK STATION REPORT CTAP4 FIG. D WHERE CATALINA STANDS IN THE ATMOSPHERE SECTION FROM SEA LEVEL, HEIGHT TO SCALE, THE STATION IN THE STANDARD ATMOSPHERE FT ABOVE SEA LEVEL 0 5,000 10,000 15,000 SEA LEVEL, 29.92 inHg IN THE STANDARD ATMOSPHERE CATALINA 1 PER CENT OF THE AIR BELOW IT 384 FT 10 PER CENT OF THE AIR BELOW, 2,890 FT 20 PER CENT OF THE AIR BELOW, 6,050 FT 30 PER CENT OF THE AIR BELOW, 9,540 FT 40 PER CENT OF THE AIR BELOW, 13,470 FT STANDARD PRESSURE HERE 29.51 inHg STANDARD TEMPERATURE HERE 57.6 F TEMPERATURE, REPORTED 76.0 F TITLE Catalina, the column STATION REPORT · DCP CTAP4 TYPE SECTION SCALE HEIGHT TO SCALE REV AS REPORTED SHEET 3 of 5 DATE 2026-10-11 ID SR-CTAP4-3 DRAWN AS linework on paper SOURCES FB-ENG-001, FB-ENG-003 On Oct 11 the noon sun stands 64 degrees above the horizon at 18.34 N, and the day is 11 h 41 min long. Level ground there takes 90 per cent of the noon sunlight a surface facing the sun would.
Elevation of the noon sun at Catalina, angles true: on Oct 11 it stands 64 degrees above the horizon, against 85 at the June solstice, 72 at the equinoxes and 48 at the December solstice; the day is 11 h 41 min long. 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 A A B B C C D D E E © 2026 STORM STATION 247 THE FIELD BOOK STATION REPORT CTAP4 FIG. E THE SUN AT CATALINA ELEVATION LOOKING WEST, SOUTH TO THE LEFT: THE NOON SUN ON THE DAY OF THE REPORT, AND AT THE SOLSTICES AND EQUINOXES; ANGLES TRUE THE STATION JUNE SOLSTICE 85° EQUINOXES 72° DECEMBER SOLSTICE 48° OCT 11, 64° SOUTH ANGLES TRUE; THE RAYS ARE OF ONE LENGTH AND DRAW DIRECTION ONLY DAY LENGTH 11 H 41 MIN LEVEL GROUND TAKES 90 PER CENT OF THE NOON SUN A FACING SURFACE WOULD LATITUDE 18.34 N; THE SUN'S DECLINATION -7.2° TITLE Catalina, the sun STATION REPORT · DCP CTAP4 TYPE ELEVATION SCALE ANGLES TRUE REV AS REPORTED SHEET 4 of 5 DATE 2026-10-11 ID SR-CTAP4-4 DRAWN AS linework on paper SOURCES FB-ENG-007 A data collection platform, 384 ft above sea level. Its report of Oct 11, 2026, 1:17 AM local time is written on the sensors that made it.
Elevation of a data collection platform, Catalina, each sensor drawn and labelled with what it read: antenna, sending by satellite, last heard oct 11, 2026, 1:17 am local time; air temperature, 76.0 f, dew point 74.7 f; precipitation gauge, 0.00 in today. 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 A A B B C C D D E E © 2026 STORM STATION 247 THE FIELD BOOK STATION REPORT CTAP4 FIG. F THE INSTRUMENT ELEVATION OF A DATA COLLECTION PLATFORM, EACH SENSOR WITH WHAT IT READ, OCT 11, 2026, 1:17 AM LOCAL TIME ANTENNA, SENDING BY SATELLITE LAST HEARD OCT 11, 2026, 1:17 AM LOCAL TIME AIR TEMPERATURE 76.0 F, DEW POINT 74.7 F PRECIPITATION GAUGE 0.00 IN TODAY SCHEMATIC; THE SPACING BETWEEN SENSORS IS NOT TO SCALE TITLE Catalina, the instrument STATION REPORT · DCP CTAP4 TYPE ELEVATION SCALE SCHEMATIC REV AS REPORTED SHEET 5 of 5 DATE 2026-10-11 ID SR-CTAP4-5 DRAWN AS linework on paper SOURCES FB-INS-001 
FB-WAT-020, Fig. AFog types
FB-WAT-002, Fig. CHumidity variables
FB-ENG-011, Fig. AWater vapour as a gas
FB-ENG-005, Fig. ALapse rates and stability
