Collier, E., Sauter, T., Mölg, T., and Hardy, D.: The Influence of Tropical Cyclones on Circulation, Moisture Transport, and Snow Accumulation at Kilimanjaro During the 2006–2007 Season, J. Geophys. Res.- Atmos., 124, 6919–6928,
https://doi.org/10.1029/2019JD030682, 2019.
a,
b,
c,
d,
e,
f
Finney, D. L., Marsham, J. H., Walker, D. P., Birch, C. E., Woodhams, B. J., Jackson, L. S., and Hardy, S.: The effect of westerlies on East African rainfall and the associated role of tropical cyclones and the Madden–Julian Oscillation, Q. J. Roy. Meteor. Soc., 146, 647–664,
https://doi.org/10.1002/qj.3698, 2020.
a,
b,
c,
d,
e,
f,
g,
h,
i,
j,
k
Fisher, R. A.: Statistical Methods for Research Workers, Oliver & Boyd, Edinburgh, 14th edn., ISBN 978-0-05-002170-5, 1970. a
Funk, C., Peterson, P., Landsfeld, M., Pedreros, D., Verdin, J., Shukla, S., Husak, G., Rowland, J., Harrison, L., Hoell, A., and Michaelsen, J.: The climate hazards infrared precipitation with stations – a new environmental record for monitoring extremes, Scientific Data, 2, 150066,
https://doi.org/10.1038/sdata.2015.66, 2015.
a
Guan, B. and Waliser, D. E.: Detection of atmospheric rivers: Evaluation and application of an algorithm for global studies, J. Geophys. Res.-Atmos., 120, 12514–12535,
https://doi.org/10.1002/2015JD024257, 2015.
a,
b
Gudoshava, M., Nyinguro, P., Talib, J., Wainwright, C., Mwanthi, A., Hirons, L., de Andrade, F., Mutemi, J., Gitau, W., Thompson, E., Gacheru, J., Marsham, J., Endris, H. S., Woolnough, S., Segele, Z., Atheru, Z., and Artan, G.: Drivers of sub-seasonal extreme rainfall and their representation in ECMWF forecasts during the Eastern African March-to-May seasons of 2018–2020, Meteorol. Appl., 31, e70000,
https://doi.org/10.1002/met.70000, 2024.
a,
b,
c,
d
Hastenrath, S., Polzin, D., and Camberlin, P.: Exploring the predictability of the “Short Rains” at the coast of East Africa, Int. J. Climatol., 24, 1333–1343,
https://doi.org/10.1002/joc.1070, 2004.
a
Hastenrath, S., Polzin, D., and Mutai, C.: Diagnosing the Droughts and Floods in Equatorial East Africa during Boreal Autumn 2005–08, J. Climate, 23, 813–817,
https://doi.org/10.1175/2009JCLI3094.1, 2010.
a
Hersbach, H., Bell, B., Berrisford, P., Hirahara, S., Horányi, A., Muñoz-Sabater, J., Nicolas, J., Peubey, C., Radu, R., Schepers, D., Simmons, A., Soci, C., Abdalla, S., Abellan, X., Balsamo, G., Bechtold, P., Biavati, G., Bidlot, J., Bonavita, M., De Chiara, G., Dahlgren, P., Dee, D., Diamantakis, M., Dragani, R., Flemming, J., Forbes, R., Fuentes, M., Geer, A., Haimberger, L., Healy, S., Hogan, R. J., Hólm, E., Janisková, M., Keeley, S., Laloyaux, P., Lopez, P., Lupu, C., Radnoti, G., de Rosnay, P., Rozum, I., Vamborg, F., Villaume, S., and Thépaut, J.-N.: The ERA5 global reanalysis, Q. J. Roy. Meteor. Soc., 146, 1999–2049,
https://doi.org/10.1002/qj.3803, 2020.
a
Hersbach, H., Bell, B., Berrisford, P., Biavati, G., Horányi, A., Muñoz Sabater, J., Nicolas, J., Peubey, C., Radu, R., Rozum, I., Schepers, D., Simmons, A., Soci, C., Dee, D., and Thépaut, J.-N.: ERA5 hourly data on single levels from 1940 to present, Copernicus Climate Change Service (C3S) Climate Data Store (CDS) [data set],
https://doi.org/10.24381/cds.adbb2d47, 2023.
a
Ho, C.-H., Kim, J.-H., Jeong, J.-H., Kim, H.-S., and Chen, D.: Variation of tropical cyclone activity in the South Indian Ocean: El Niño–Southern Oscillation and Madden–Julian Oscillation effects, J. Geophys. Res.-Atmos., 111,
https://doi.org/10.1029/2006JD007289, 2006.
a
Hogan, E., Shelly, A., and Xavier, P.: The observed and modelled influence of the Madden–Julian Oscillation on East African rainfall, Meteorol. Appl., 22, 459–469,
https://doi.org/10.1002/met.1475, 2015.
a
Huffman, G. J., Stocker, E. F., Bolvin, D. T., Nelkin, E. J., and Tan, J.: GPM IMERG Final Precipitation L3 1 day 0.1 degree x 0.1 degree V07, Goddard Earth Sciences Data and Information Services Center (GES DISC) [data set], Greenbelt, MD,
https://doi.org/10.5067/GPM/IMERGDF/DAY/07, 2023.
a
Jones, B.: Kenya bears the brunt as floods devastate east Africa,
https://www.theguardian.com/news/2020/may/13/kenya-bears-the-brunt-as-floods-devastate-central-africa (last access: 13 March 2025), 2020. a
Kebacho, L. L.: Climatological characteristics and interannual variability of the leading mode of eastern African precipitation in January and February, Int. J. Climatol., 44, 1371–1390,
https://doi.org/10.1002/joc.8387, 2024.
a,
b
Kilavi, M., Macleod, D., Ambani, M., Robbins, J., Dankers, R., Graham, R., Helen, T., Salih, A., and Todd, M.: Extreme Rainfall and Flooding over Central Kenya Including Nairobi City during the Long-Rains Season 2018: Causes, Predictability, and Potential for Early Warning and Actions, Atmosphere, 9, 472,
https://doi.org/10.3390/atmos9120472, 2018.
a,
b,
c,
d,
e
Klein Tank, A. M. G., Zwiers, F. W., and Zhang, X.: Guidelines on Analysis of Extremes in a Changing Climate in Support of Informed Decisions for Adaptations, Technical Report WMO/TD-1500, World Meteorological Organization (WMO),
https://www.ecad.eu/documents/WCDMP_72_TD_1500_en_1.pdf (last access: 3 November 2025), 2009. a
Knapp, K. R., Kruk, M. C., Levinson, D. H., Diamond, H. J., and Neumann, C. J.: The International Best Track Archive for Climate Stewardship (IBTrACS): Unifying Tropical Cyclone Data, B. Am. Meteorol. Soc., 91, 363–376,
https://doi.org/10.1175/2009BAMS2755.1, 2010.
a,
b
Konstali, K., Spensberger, C., Spengler, T., and Sorteberg, A.: Global Attribution of Precipitation to Weather Features, J. Climate, 37, 1181–1196,
https://doi.org/10.1175/JCLI-D-23-0293.1, 2024.
a,
b,
c,
d,
e,
f
Kossin, J. P., Olander, T. L., and Knapp, K. R.: Trend Analysis with a New Global Record of Tropical Cyclone Intensity, J. Climate, 26, 9960–9976,
https://doi.org/10.1175/JCLI-D-13-00262.1, 2013.
a
Lavers, D. A., Simmons, A., Vamborg, F., and Rodwell, M. J.: An evaluation of ERA5 precipitation for climate monitoring, Q. J. Roy. Meteor. Soc., 148, 3152–3165,
https://doi.org/10.1002/qj.4351, 2022.
a
Liebmann, B., Hendon, H. H., and Glick, J. D.: The Relationship Between Tropical Cyclones of the Western Pacific and Indian Oceans and the Madden-Julian Oscillation, J. Meteorol. Soc. Jpn., Ser. II, 72, 401–412,
https://doi.org/10.2151/jmsj1965.72.3_401, 1994.
a
Mavume, A., Rydberg, L., Rouault, M., and Lutjeharms, J.: Climatology and Landfall of Tropical Cyclones in the South- West Indian Ocean, Western Indian Ocean Journal of Marine Science, 8,
https://doi.org/10.4314/wiojms.v8i1.56672, 2010.
a
Nakamura, K.: Equatorial westerlies over east Africa and their climatological significance, Geographical Review of Japan, 41, 359–373,
https://doi.org/10.4157/grj.41.359, 1968.
a
Palmer, P. I., Wainwright, C. M., Dong, B., Maidment, R. I., Wheeler, K. G., Gedney, N., Hickman, J. E., Madani, N., Folwell, S. S., Abdo, G., Allan, R. P., Black, E. C. L., Feng, L., Gudoshava, M., Haines, K., Huntingford, C., Kilavi, M., Lunt, M. F., Shaaban, A., and Turner, A. G.: Drivers and impacts of Eastern African rainfall variability, Nature Reviews Earth & Environment, 4, 254–270,
https://doi.org/10.1038/s43017-023-00397-x, 2023.
a
Parry, J.-E., Echeverría, D., Dekens, J., and Maitima, J.: Climate Risks, Vulnerability and Governance in Kenya: A review, United Nations Development Programme (UNDP) and International Institute for Sustainable Development (IISD), Winnipeg, Manitoba, Canada, 78 pp.,
https://www.iisd.org/system/files/publications/climate_risks_kenya.pdf (last access: 3 November 2025), 2012. a
Peal, R. and Collier, E.: Westerly Moisture Transport Events: A flexible framework for studying intraseasonal variability in East Africa, Version v3, Zenodo [data set],
https://doi.org/10.5281/zenodo.16875302, 2025.
a,
b
Pohl, B. and Camberlin, P.: Influence of the Madden–Julian Oscillation on East African rainfall. I: Intraseasonal variability and regional dependency, Q. J. Roy. Meteor. Soc., 132, 2521–2539,
https://doi.org/10.1256/qj.05.104, 2006.
a,
b,
c,
d,
e,
f
Spensberger, C.: Dynlib: A library of diagnostics, feature detection algorithms, plotting and convenience functions for dynamic meteorology, Version 1.1, Zenodo [code],
https://doi.org/10.5281/zenodo.4639624, 2021.
a,
b
Spensberger, C., Konstali, K., and Spengler, T.: Moisture transport axes: a unifying definition for tropical moisture exports, atmospheric rivers, and warm moist intrusions, Weather Clim. Dynam., 6, 431–446,
https://doi.org/10.5194/wcd-6-431-2025, 2025.
a
Virtanen, P., Gommers, R., Oliphant, T. E., Haberland, M., Reddy, T., Cournapeau, D., Burovski, E., Peterson, P., Weckesser, W., Bright, J., van der Walt, S. J., Brett, M., Wilson, J., Millman, K. J., Mayorov, N., Nelson, A. R. J., Jones, E., Kern, R., Larson, E., Carey, C. J., Polat, İ., Feng, Y., Moore, E. W., VanderPlas, J., Laxalde, D., Perktold, J., Cimrman, R., Henriksen, I., Quintero, E. A., Harris, C. R., Archibald, A. M., Ribeiro, A. H., Pedregosa, F., van Mulbregt, P., and SciPy 1.0 Contributors: SciPy 1.0: Fundamental Algorithms for Scientific Computing in Python, Nature Methods, 17, 261–272,
https://doi.org/10.1038/s41592-019-0686-2, 2020.
a
Wainwright, C. M., Finney, D. L., Kilavi, M., Black, E., and Marsham, J. H.: Extreme rainfall in East Africa, October 2019–January 2020 and context under future climate change, Weather, 76, 26–31,
https://doi.org/10.1002/wea.3824, 2021.
a,
b
Walker, D. P., Marsham, J. H., Birch, C. E., Scaife, A. A., and Finney, D. L.: Common Mechanism for Interannual and Decadal Variability in the East African Long Rains, Geophys. Res. Lett., 47, e2020GL089182,
https://doi.org/10.1029/2020GL089182, 2020.
a,
b,
c,
d
Ward, N., Walker, D. P., Keane, R. J., Marsham, J. H., Scaife, A. A., Birch, C. E., and Maybee, B.: Predictability of the East Africa long rains through Congo zonal winds, Atmos. Sci. Lett., 24,
https://doi.org/10.1002/asl.1185, 2023.
a
Webster, E.: A Synoptic Climatology of Continental Tropical Low Pressure Systems over Southern Africa and Their Contribution to Rainfall over South Africa, MSc dissertation, University of Pretoria, Pretoria, South Africa,
https://repository.up.ac.za/items/93d0d9c1-5e03-4d48-a034-395325b77d61 (last access: 3 November 2025), 2019. a
Wright, G.: Kenya: Floods cause widespread devastation in Nairobi,
https://www.bbc.com/news/world-africa-68888110 (last access: 13 March 2025), 2024. a
