1. METEOSAT SECOND GENERATION (MSG)
APPLICATIONS OF
METEOSAT SECOND GENERATION (MSG)
SQUALL LINES
Author: Jochen Kerkmann (EUMETSAT)
Contributors: D. Rosenfeld (HUJ)

2. Squall Line over Western Africa
14 July 2003

3. RGB NIR1.6-VIS0.8-VIS0.6 RGB VIS0.6-IR3.9-IR10.8
MSG-1, 14 July 2003, 10:00 UTC
Squall Line over Western Africa causing violent rainfall and sandstorms

4. Click on the icon to see the animation (02:00 - 08:45 UTC, AVI, 6155 KB) !
Warm Cold
MSG-1, 14 July 2003, 02:00 UTC, IR10.8

5. Global View
Squall Line
difference IR6.2 - IR 10.8 [K] difference IR7.3 - IR10.8 [K]
MSG-1, 14 July 2003, 02:00 UTC

6. Very high (overshooting) Tops
Zoom on Western Africa
Very high (overshooting) Tops
difference IR6.2 - IR 10.8 [K] difference IR7.3 - IR10.8 [K]
MSG-1, 14 July 2003, 02:00 UTC

7. MSG-1 14 July 2003 02:00 UTC Difference Image IR6.2 - IR 7.3
Highest Tops
MSG-1
14 July 2003
02:00 UTC
Difference Image
IR6.2 - IR 7.3

8. Global View
Sand Storm
Squall Line
difference IR8.7 - IR 10.8 [K] difference IR3.9 - IR10.8 [K]
MSG-1, 14 July 2003, 02:00 UTC

9. Zoom on Western Africa
Sand Storm
Thin Cirrus
Thin Cirrus
Thick Ice Clouds
Noise in Channel 04
difference IR8.7 - IR 10.8 [K] difference IR3.9 - IR10.8 [K]
MSG-1, 14 July 2003, 02:00 UTC

10. MSG-1, 14 July 2003, 02:00 UTC, difference IR8.7 - IR10.8 [K]
Click on the icon to see the animation (02: :30 UTC, AVI, KB) !
MSG-1, 14 July 2003, 02:00 UTC, difference IR8.7 - IR10.8 [K]

11. 4 5 3 3 2 1 1 3 1 3 2 1 2 1 MSG-1 14 July 2003 10:00 UTC RGB Composite
1= Very high, cold ice clouds
with small ice particles
(developing stage, intense
precipitation)
2= very high, cold ice clouds
with large ice particles
(decaying stage)
3= Thin Cirrus
4= Altocumulus with thin
borders
5= Sand storm 4 5 3 3 2 1 1 3 1 3 2
MSG-1
14 July 2003
10:00 UTC
RGB Composite
R = WV6.2 - WV7.3
G = IR3.9 - IR10.8
B = NIR1.6 - VIS0.6 1 2 1

12. 1= Very high, cold ice clouds
with small ice particles
(developing stage, intense
precipitation)
2= very high, cold ice clouds
with large ice particles
(decaying stage)
3= Thin Cirrus
4= Altocumulus with thin
borders
5= Sand storm 4 5 3 3 2 1 1 3 1 3 2 1
MSG-1
14 July 2003
10:00 UTC
Channel 01
(VIS0.6) 2 1

13. 1= Very high, cold ice clouds
with small ice particles
(developing stage, intense
precipitation)
2= very high, cold ice clouds
with large ice particles
(decaying stage)
3= Thin Cirrus
4= Altocumulus with thin
borders
5= Sand storm 4 5 3 3 2 1 1 3 1 3 2 1
MSG-1
14 July 2003
10:00 UTC
Channel 09
(IR10.8) 2 1

14. 1= Very high, cold ice clouds
with small ice particles
(developing stage, intense
precipitation)
2= very high, cold ice clouds
with large ice particles
(decaying stage)
3= Thin Cirrus
4= Altocumulus with thin
borders
5= Sand storm 4 5 3 3 2 1 1 3 1 3 2 1
MSG-1
14 July 2003
10:00 UTC
Difference Image
WV6.2 - WV7.3 2 1

15. 1= Very high, cold ice clouds
with small ice particles
(developing stage, intense
precipitation)
2= very high, cold ice clouds
with large ice particles
(decaying stage)
3= Thin Cirrus
4= Altocumulus with thin
borders
5= Sand storm 4 5 3 3 2 1 1 3 1 3 2 1
MSG-1
14 July 2003
10:00 UTC
Difference Image
IR3.9 - IR10.8 2 1

16. 1= Very high, cold ice clouds
with small ice particles
(developing stage, intense
precipitation)
2= very high, cold ice clouds
with large ice particles
(decaying stage)
3= Thin Cirrus
4= Altocumulus with thin
borders
5= Sand storm 4 5 3 3 2 1 1 3 1 3 2 1
MSG-1
14 July 2003
10:00 UTC
Difference Image
NIR1.6 - VIS0.6 2 1

17. 1= Very high, cold ice clouds
with small ice particles
(developing stage, intense
precipitation)
2= very high, cold ice clouds
with large ice particles
(decaying stage)
3= Thin Cirrus
4= Altocumulus with thin
borders
5= Sand storm 4 5 3 3 2 1 1 3 1 3 2 1
MSG-1
14 July 2003
10:00 UTC
Difference Image
IR IR10.8 2 1

18. 1= Very high, cold ice clouds
with small ice particles
(developing stage, intense
precipitation)
2= very high, cold ice clouds
with large ice particles
(decaying stage)
3= Thin Cirrus
4= Altocumulus with thin
borders
5= Sand storm 4 5 3 3 2 1 1 3 1 3 2 1
MSG-1
14 July 2003
10:00 UTC
Difference Image
IR8.7 - IR10.8 2 1

19. 1= Very high, cold ice clouds
with small ice particles
(developing stage, intense
precipitation)
2= very high, cold ice clouds
with large ice particles
(decaying stage)
3= Thin Cirrus
4= Altocumulus with thin
borders
5= Sand storm 4 5 3 3 2 1 1 3 1 3 2 1
MSG-1
14 July 2003
10:00 UTC
Difference Image
IR8.7 - IR10.8 2 1

20. 4 5 3 3 2 1 1 3 1 3 2 1 2 1 MSG-1 14 July 2003 10:00 UTC RGB Composite
1= Very high, cold ice clouds
with small ice particles
(developing stage, intense
precipitation)
2= very high, cold ice clouds
with large ice particles
(decaying stage)
3= Thin Cirrus
4= Altocumulus with thin
borders
5= Sand storm 4 5 3 3 2 1 1 3 1 3 2
MSG-1
14 July 2003
10:00 UTC
RGB Composite
R = IR IR10.8
G = IR IR3.9
B = WV7.3 - WV6.2 1 2 1

21. Squall Line over Central Africa
20 May 2003

22. MSG-1, 20 May 2003, 14:00 UTC, RGB VIS0.6 / IR3.9i / IR12.0i
Chad
Sudan
Central
African
Republic
Cameroon
Squall Line
Dem. Republic
of the Kongo
Congo
MSG-1, 20 May 2003, 14:00 UTC, RGB VIS0.6 / IR3.9i / IR12.0i
Effect of different enhancements

23. 0.8 mm
3.9r mm
10.8 mm
MSG :30 UTC, Animation 1/5

24. 0.8 mm
3.9r mm
10.8 mm
MSG :45, Animation 2/5

25. 0.8 mm
3.9r mm
10.8 mm
MSG :00, Animation 3/5

26. 0.8 mm
3.9r mm
10.8 mm
MSG :15, Animation 4/5

27. 0.8 mm
3.9r mm
10.8 mm
MSG :30, Animation 5/5

28. Click on the icon to see the animation (12:00 - 14:30 UTC, AVI, 13417 KB) !
MSG-1
20 May 2003
12:00 UTC
RGB Composite
R = VIS0.6
G = NIR1.6
B = IR3.9i

29. SUMMARY

30. Monitoring of Squall Lines
IR10.8 to get info on cloud top temperature/height
WV6.2-IR10.8 and WV6.2-WV7.3 to identify highest tops
HRVIS to see detailed structures
NIR1.6 and IR3.9 (solar component) to get information on phase and particle size
IR3.9 - IR10.8 to find areas with most intense development/precipitation
RGBs to monitor cloud types and convective development:
RGB 01/03/09 (Day) or RGB 01/04/09 (Day)
RGB 05-06/04-09/03-01 (Day)
RGB 10-09/09-04/09 (Day & Night)
RGB 10-09/09-04/06-05 (Day & Night)