Air Weather Service Manual

Front Cover
Department of the Air Force, Air Weather Service - Weather
 

Selected pages

Contents

Type III Air Structure
19
Example of Type IIIAmarillo Tex 092100Z March 1953
20
Example of Type IIISanta Maria Calif 201500Z Dec 1952
21
Example of Type IIIMedford Oreg 201500Z Jan 1953
22
Example of Type IIIPortland Oreg 201500Z Jan 1953
23
Analysis example wind flow
26
Streamline analysis
27
Legend for Activity Chart
30
Example Activity Chart_
31
Plotting Model MPI Chart
33
MPI Chart Example
34
Example of Forecast Sounding and Verification Atlanta 290300Z March 1954
35
mb Relative Humidity 1703002 March 1951
41
Dew Point Analysis 17 March 1951
42
Vertical Cross Section 170300Z March 1951
44
11000 Foot Wind Speed Analysis 170300Z March 1951
45
Pressure of the Level of Free Convection in Millibars 170300Z March 1951
46
Air Structure 170300Z March 1951
47
Barksdale AFB Sounding 171500Z March 1951
48
Surface Pressure and Frontal Analysis 171230Z March 1951
49
Forecast Air Structure valid 171830Z March 1951
51
Air Structure 171500Z March 1951
52
Verification Chart 1718 March 1951
53
Air Structure 180300Z March 1951
54
Forecasting Peak Wind Gusts in NonFrontal Thunderstorms
55
Wind Gust Graph
56
Sample Gust Forecast
57
Hail Forecasting Diagram
59
Sample Hail Forecast_
61
Sounding for Sample Turbulence Forecast_
62
Aircraft Critical Wind Speeds
68
Aircraft Critical Wind Speeds
69
Aircraft Critical Wind Speeds
70
Aircraft Critical Wind Speeds
71
Monthly Tornado Frequency 1916 through 1953
81
Tornado Statistics
84
Seasonal Variation of Destructive Local Storms 19421951
85
Destructive Local Storms 19421951
88
Predominant Types of Destructive Local Storms by Season 19421951
89
Position of Destructive Local Storms Relative to Midtropospheric Pressure Patterns 19421951 ___
90
Percent of Midtropospheric Cyclones Contemporaneous With Destructive Local Storms 19421951 16
91
Percent of Midtropospheric Cells Contemporaneous With Destructive Local Storms 19421951__
93
Percent of Midtropospheric Troughs and Ridges Contemporaneous With De structive Local Storms 19421951
94
Example of t Analysis
96
Analysis of Storm 12 July 1953
98
Analysis of Storm of 15 Aug 1952
99
Analysis of Storm of June 2122 1952
100
Forecasting Hail
101
Upward Speed of Air Necessary to Sustain a Hailstone Near 14000 feet MSL
102
Mean ½ Hailstone Sounding 68 cases
103
Mean 1 Hailstone Sounding 25 cases
104
Figure Page 62 Mean 4 Hailstone Sounding 2 cases
105
Mean Tornado Sounding 75 cases
106
Variation of Temperature at Various Levels With Hailstone Size
107
Variation of Dew Point and Mean Mixing Ratio of Moist Layer With Hail stone Size
108
Variation of Ambient and Wet Bulb Freezing Levels With Hailstone Size
109
Variation of Stability Indices With Hailstone Size
110
Number of Reported Cases of Hail of Various Sizes by Selected Levels of 0 C
111
Hail Forecast Graph Construction
114
Hail Forecasts Verified by Occurrence Only
115
Mean Hail Sounding 4 Size
117
Mean Hail Sounding ½ Size_ 72
119
Mean Hail Sounding 1 Size
120
Mean Hail Sounding 1½ Size
121
Mean Hail Sounding 2 Size
122
Mean Hail Sounding 2½ Size
123
Mean Hail Sounding 3 Size
124
Mean Hail Sounding 3½ Size
125
Mean Hail Sounding 4 Size
126
SECTION 1
1
FORECASTING MAXIMUM WIND GUSTS OF CONVECTIVE
38
Forecasting Turbulence Aloft
57
Page 3 right hand column par 2 2 line 17
17
GENERAL
3
35
38
37
555
iv
CODING INSTRUCTIONS FOR FIRST GROUP C1C2dsdsfsfs
5
Page 17 par 2 10 2 RULE 5 line
9
CODING INSTRUCTIONS SECOND GROUP
14
INDICATOR 4 GROUP CODING INSTRUCTIONS 4DvDvSnSfR
26
INDICATOR 6 GROUP
34
131
54
SWWC RECOMMENDATIONS FOR WEATHER OBSERVERS
61
ENCODING PROCEDURES 1
39
I
Chapter 4
4
SECTION 7
7
Appendir APPENDIXES
Weather Phenomena Forecast by the SWWC
1
Glossary of Selected Terms
2
Tornado Frequencies and Damage
3
Background Information on Wind Gust Forecasting
5
EXAMPLE
16
18
17
Additional Severe Local Storm Climatology
4
Sample SOP for Severe Weather Warnings
7
List of Figures
12
Background Information on Hail Forecasting
6
Sample Severe Weather Warning Log Sheet
8
Sample AF Base Severe Weather Warning Plan Table
9
Most Severe Icing Intensity to be Expected in Layertype Clouds
32
OPERATION OF EQUIPMENT
51
Plotting Surface Synoptic Charts
5
2610
17
POMAR Reports
30
Plotting Reports from Ship Stations
38
Method of Indicating Analyses on Constant Pressure Charts
49
Construction of Surface and Constant Pressure Prognostic Charts
55
Computing Wind Speed and Direction
5
Tornado Producing Air Mass Type I
i
TABLES
iii
Table I
3
Figures
22
39
23
42
40
62
81
Tornado Producing Air Mass Type II
ii
Tornado Producing Air Mass Type III
iii
Summary of Tornado Producing Air Mass Characteristics
4
Recommended Isopleth Intervals
5
Critical Wind Speeds for Parked Aircraft__
6
Tornado Reports by Month 1916 through 1955
9
Number of Occurrences of Midtropospheric Pressure Pattern 19421951
11
Hailstone Soundings Size vs Number of Reports
12
Frequency of Reported Hail vs Height of wetbulb zero
13
Verification Limits Hailstone size
14
Verification 219 cases
15
Figure
21
Type I Air Structure
1
FIGURES
7
CHAPTER
1
Example of Type ISan Antonio 290300Z April 1953_
2
Example of Type IMount Clemens Mich 090300Z June 1953
6
VISUAL AND INSTRUMENTAL OBSERVATIONS
10
12
12
EQUIPMENT UTILIZATION
21
24
24
25
25
6
28
8
38
11
52
II
59
IV
70
77
72
6849

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Air Weather Service Manual, Issues 105-124

Full view - 1952
Air Weather Service Manual, Issue 105

Full view - 1953
Air Weather Service Manual, Issue 105

Full view - 1948
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Common terms and phrases

17 March Air Force air mass air structure AIR TEMPERATURE CURVE Air Weather Service altitude analysis AWS Form AWSM Base ChhHH Code Figure cold front contour convective convective condensation level destructive local storms determine dew point diameter droplets DRY ADIABATS equipment example feet fix 25 miles flight level observation FREE AIR TEMPERATURE geostrophic wind gradient wind GRADIENT WIND SCALE hailstones height inches indicated Instability Index ISOBARS ISOTHERMS knots last fix 25 line of echoes Mean Hail Sounding millibars Moderate moist adiabat moist layer nautical miles Oblique Visibility occur past weather percent personnel position Winds averaged precipitation pressure Quadrant radar rarep RECCO Code relative humidity reported severe weather Severe Weather Warning shown in figure squall line station stratiform supercooled surface temperature SWWC thunderstorm tion tornadoes turbulence values vertical Wea Gp Weather Officer WET BULB CURVE wet-bulb temperature Wet-Bulb-Zero wind direction wind gusts wind speed

Popular passages

Page 13 - Sea like a mirror Ripples with the appearance of scales are formed, but without foam crests Small wavelets, still short but more pronounced; crests have a glassy appearance and do not break Large wavelets, crests begin to break; foam of glassy appearance; perhaps scattered white horses...‎
Appears in 79 books from 1897-2007
Page 53 - Dry haze. Widespread dust in suspension in the air, not raised by wind at or near the station at the time of observation. Dust or sand raised by...‎
Appears in 11 books from 1948-1981
Page 53 - Figure 0 Fair, clear or slightly clouded 1 Variable sky 2 Mainly overcast 3 Sandstorm, duststorm or drifting snow 4 Fog or thick dust...‎
Appears in 13 books from 1930-1983

Bibliographic information

TitleAir Weather Service Manual
ContributorUnited States. Air Weather Service
PublisherDepartment of the Air Force, Air Weather Service
Original fromthe University of Michigan
Digitized1 Dec 2006
  
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