WMOD00315

• Title: Investigations of Winter Storms Over the Wasatch Plateau During the 1991 Utah/NOAA Field Program
• Prepared For: Utah Department of Natural Resources Division of Water Resources
• Prepared By: Arlen W. Huggins, Melanie A. Wetzel, Patricia A. Walsh
• Date: 10/1/1992
• State: UT
• Weather Modification - Doc Type: Report

LIST OF FIGURES

Figure 2.1. 1991 Utah/NOAA research area on the Wasatch Plateau of central Utah. .. 2-2
Figure 2.2.' Plot of brightness temperature at 31.65 MHz versus integrated liquid depth
computed from Eqn. (2). ...................................2-5
Figure 3.1. 700 mb analysis for 1700 MST 14 January 1991. . . . . . . . . . . . . . . . . .3-2
Figure 3.2. Surface and 500 mb analysis for 0500 15 January 1991. ............ 3-3
Figure 3.3. Temporal plots of meteorological data from the DOT site for 14 January
1991 during Storm Period 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-4
Figure 3.4. Same as Fig. 3.3, except for 15 Janury 1991 during Storm Period 1. . . . . . 3-5
Figure 3.5. Same as Fig. 3.3, except for 161anuary 1991 during Storm Period 1. . . . . 3-6
Figure 3.6. 700 mb analysis for 0500 17 January 1991. .................... 3-8
Figure 3.7. Temporal plots of meteorological data from the DOT site for 17 January
1991 during Storm Period 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-9
Figure 3.8. Same as Fig. 3.7, except for 18 January 1991 during Storm Period 2. . . . 3-10
Figure 3.9. 700 mb analysis for 0500 19 January 1991. ................... 3-12
Figure 3.10. Temporal plots of meteorological data from the DOT site for 19 January
1991 during Storm Period 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13
Figure 3.11. Skew-T log-P plot of the 1000 MST Mt. Pleasant sounding for 19 January

1991. .............................................. 3: 14
Figure 3.12a. GOES-7 infrared image taken at 1300 MST 19 January 1991. . . . . . . . 3-15
Figure 3.12b. Same as Fig. 3. 12a, except for 1700 MST 19 January 1991. ....... 3-16
Figure 3.13. Time versus height plot of maximum dB~ recorded by the vertically-
pointing K.-band radar at the DOT site. ......................... 3-17
Figure 3.14. 700 mb analysis for 1700 28 January 1991. .................. 3-19
Figure 3.15. Temporal plots of meteorological data from the DOT site for 28 January
1991 during Storm Period 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-20
Figure 3.16. Same as Fig. 3.15, except for 29 January 1991 during Storm Period 4. . 3-21
Figure 3.17a. GOES-7 infrared image taken at 1700 MST 28 January 1991. . . . . . . . 3-22
Figure 3.17b. Same as Fig. 3. 17a, except for 2100 MST 28 January 1991. ....... 3-23
Figure 3.18. Surface and 500 mb analyses for 0500 3 February 1991. .......... 3-25
Figure 3.19. 700 mb analysis for 0500 3 February 1991. .................. 3-26
Figure 3.20. Temporal plots of meteorological data from the DOT site for 2 February
1991 during Storm Period 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-27
Figure 3.21. Same as Fig. 3.20, except for 3 February 1991 during Storm Period 5. . 3-28
Figure 3.22. Skew-T log-P plot of the 0600 MST Mt. Pleasant sounding for 3 February

1991. ..............................................3-29
Figure 3.23. Surface and 500 mb analyses for 0500 13 February 1991. . . . . . . . . . . 3-31
Figure 3.24. 700 mb analysis for 0500 13 February 1991. . . . . . . . . . . . . . . . . . . 3-32
Figure 3.25. Temporal plots of meteorological data from the DOT site for 12 February
1991 during Storm Period 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-33
Figure 3.26. Same as Fig. 3.25, except for 13 February 1991 during Storm Period 6. . 3-34
Figure 3.27. Same as Fig. 3.25, except for 14 February 1991 during Storm Period 6. . 3-35
Figure 3.28. Time versus height plot of 1-min average dB~ values recorded by the
vertically-pointing K.-band radar at the DOT site from 1000-1100 MST on 13

February 1991. ........................................3-36
Figure 3.29a. GOES-7 infrared image taken at 1000 MST 13 February 1991. . . . . . . 3-37
Figure 3.29b. Same as Fig. 3.29a, except for 1700 MST 13 February 1991. ...... 3-38
Figure 3.30. 700 mb analysis for 1700 16 February 1991. . . . . . . . . . . . . . . . . . . 3-40
Figure 3.31. Surface and 500 mb analyses for 0500 17 February 1991. . . . . . . . . . . 3-41
Figure 3.32. Same as Fig. 3.30, except for 0500 17 February 1991. ........... 3-42

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