REPUBLIC OF KENYA
MINISTRY OF TRANSPORT
KENYA METEOROLOGICAL DEPARTMENT
Dagoretti Corner, Ngong Rd, P. O. Box 30259, 00100 GPO, Nairobi, Kenya
Telephone: 254 (0) 20 3867880-7 / 3876957/60 / 3873682
Mobile: 254(0)724255153/ 254(0)724255154
Fax: 254 (0) 20 3876955/3877373/3867888/3874501
e-mail: director@meteo.go.ke; Website: http://www.meteo.go.ke
Date 19th June 2008
Ref. No. Met/ 1622
WEATHER REVIEW FOR THE LAST SEVEN DAYS 12TH TO 18TH JUNE 2008 AND THE EXPECTED
CONDITIONS DURING THE NEXT SEVEN DAYS VALID, 20TH TO 26TH JUNE 2008.
1.
WEATHER HIGHLIGHTS
 Intense wet weather conditions were experienced over the coastal parts of the country with
western and northeastern parts recording substantial amounts of rainfall during the last sevenday period (12th to 18th June, 2008). The rest of the country recorded relatively dry conditions.
 Cool and cloudy conditions occurred in the central districts during the review period when
maximum (daytime) temperatures fell below 20°C in some areas. The minimum (nighttime)
temperatures were moderate over several places.
 The forecast for the next seven days (20th to 26th June 2008) indicates that the better part of the
country will still be generally dry. The Western and the coastal areas will however continue to
experience light to moderate rainfall amounts which are expected to reduce towards the end of the
forecast period. Cool and cloudy conditions with occasional light rains/drizzles will also persist
over the Central highlands including Nairobi especially during the morning hours.
2. WEATHER SUMMARY
(a) Rainfall review:
Intense wet weather conditions were experienced over the coastal parts of the country during the last sevenday period (12th to 18th June 2008) with moderately wet conditions being experienced over the northeastern
and western parts of the country. On the 15th of June, coastal stations recorded the highest one-day rainfall
over the country with Msabaha leading with 82.7mm followed by Malindi with 70.6mm. The rest of the
country remained relatively dry with the central parts of the country recording low amounts of precipitation
during the review period.
Msabaha station recorded the highest seven-day rainfall total amount of 174.8mm followed by Malindi,
Mombasa, Mtwapa, Lamu, Moyale, Eldoret, Kericho, Garissa, Kabarak, Kisii, and Nyeri with 145.2, 132.5,
119.2, 84.8, 40.9, 26.5, 26.5, 18.3, 12.6, 11.7, and 10.9mm respectively. Kakamega, Kisii, Embu, Thika,
Kitale, Nyahururu, Marsabit, Voi, Wajir, and Dagoretti recorded between 1 and 10mm while the rest of the
stations recorded less than a millimeter as seen in figure 1.
200.0
174.8
180.0
160.0
145.2
132.5
119.2
120.0
100.0
84.8
80.0
60.0
40.9
40.0
26.5 26.5
18.3
20.0
1.5 0.0 2.2
0.0 1.8
8.7
6.1
0.2
12.6
11.7
2.1 0.0
10.9
0.0
4.6 0.0 0.0 0.0 1.4 0.5 0.0 2.5 0.0 0.0 1.7
MOMBASA
MTWAPA
MSABAHA
LAMU
MALINDI
VOI
MAKINDU
THIKA
MACHAKOS
JKIA
WILSON
M.A.B.
MERU
DAGORETTI
STATION
LAIKIPIA
EMBU
NYERI
NAROK
KABARAK
NAKURU
NYAHURURU
KISII
KISUMU
KERICHO
ELDORET A/P
ELDORET
KAKAMEGA
KITALE
MANDERA
WAJIR
GARISSA
MOYALE
MARSABIT
0.0
LODWAR
RAINFALL (MM)
140.0
FIGURE 1: SEVEN-DAY RAINFALL TOTALS FROM 12TH TO 18TH JUNE 2008
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(b) Temperature review:
Cool and cloudy conditions were dominant in the central districts during the review period (12th -18th June).
Maximum (daytime) temperatures occasionally fell below 20°C over some areas due to the overcast sky
conditions. Nyeri, Embu and Dagoretti stations for example recorded 17.3°C, 19.4°C and 19.0°C on 12th
June respectively. However, the northwestern districts still recorded high daytime temperatures. Lodwar
station recorded the highest daily maximum temperature of 35.3°C (on 14th June) as well as the highest
seven-day average maximum temperature of 34.2°C.
Minimum (nighttime) temperatures were moderate over most parts of the country including the Central
Highlands. Nyahururu station still recorded the lowest daily minimum temperature of 5.1°C (on 14th June)
as well as the lowest seven-day average minimum temperature of 7.7°C (see details in figure 2).
40.0
27.3
21.0
27.9
18.8
22.1
29.2
23.0
28.0
26.3
19.5
15.2
13.0
13.4
12.3
21.3
20.9
20.3
12.0
11.3
12.6
7.7
10.0
21.4
20.6
16.6
14.9
9.0
11.7
13.5
12.4
14.2
20.0
15.0
24.4
28.2
24.3
23.4
22.3
26.6
24.7
24.1
22.1
20.8
23.1
24.3
TEMPERATURE IN oC
30.0
25.0
MIN.
31.6
30.7
34.2
35.0
MAX.
5.0
MOMBASA
MALINDI
LAMU
VOI
MAKINDU
MERU
EMBU
NYERI
NAROK
NAKURU
DAGORETTI
STATION
NYAHURURU
KISUMU
KISII
KERICHO
ELDORET
KAKAMEGA
KITALE
MANDERA
WAJIR
GARISSA
MARSABIT
LODWAR
0.0
FIG2: SEVEN-DAY MAXIMUM & MINIMUM TEMPERATURES FROM 12TH TO 18TH JUNE 2008
3: EXPECTED DEVELOPMENTS (FROM 20TH TO 26TH JUNE 2008)
Pressures over the South Atlantic Ocean (St. Hellena) region are expected to be generally moderate
weakening towards the end of the forecast period The South African region will be under moderate
pressures which are expected to strengthen as the period progresses. The Mozambique Channel will be
under strong pressures at the beginning weakening as the forecast period progresses. Pressures over the
South Western Indian Ocean (Mascarene) are expected to be fairly strong strengthening as the period
progresses. Pressures over the Arabian region will remain generally weak for most of the period. The upperlevel winds are expected to be convergent over the country. This will suppress convection and chances of
showers.
In view of these developments, wet weather conditions are expected to continue over the western parts of the
country reducing towards the end. The coastal areas are also likely to experience low key rainfall amounts
expected to reduce as the period progresses. Cool and cloudy conditions with occasional light morning
rains/drizzles will persist over the Central highlands with relatively warmer conditions setting in at the
beginning of the forecast period. Generally dry conditions will be experienced elsewhere in the country.
4: FORECAST FOR THE NEXT SEVEN DAYS FROM 20TH TO 26TH JUNE 2008
Following these developments, it is expected that:
The Lake Victoria basin, Highlands west of the Rift Valley and Central Rift Valley (Kitale,
Kakamega, Kisumu, Kisii, Kericho, Eldoret, Nakuru, Narok, Nyahururu, etc) will experience
afternoon showers and thunderstorms over few places occasionally increasing to several places towards the
end of the forecast period.
2
The Central highlands including Nairobi area (Nyeri, Meru, Dagoretti, Embu, etc) will experience
slightly warmer conditions with light morning/drizzles over few places during the first half of the forecast
period. Thereafter, cool and cloudy conditions with occasional light morning rains/drizzles over few places
will persist.
The Southeastern lowlands (Voi, Makindu, Machakos etc) will experience generally dry conditions
throughout the forecast period
.
The Northeastern districts (Marsabit, Moyale, Mandera, Wajir, Garissa etc) and Southeastern
lowlands (Voi, Makindu, Machakos etc) will experience generally sunny and dry conditions throughout
the forecast period
The Northwestern districts (Lodwar, Lokitaung, Lokichoggio, etc) and will experience generally sunny
conditions with occasional afternoon showers and thunderstorms confined to the Kenya/Uganda borders
especially at the beginning of the forecast period.
The Coastal region (Mombasa, Kilifi, Malindi, Lamu etc) will experience morning showers over few
places especially at the beginning of the forecast period.
N.B: This forecast should be used in conjunction with the daily( 24-hour) forecast issued by this
Department
KEY OF SCIENTIFIC WORDS USED
High Pressure System (Anticyclone): An area associated with clear skies or fine weather.
Ridge: An elongated area of high pressure from which winds flow outward.
Most Places: Between 66% and 100%.
Several Places: Between 33% and 66%
Few Places: Between 0 and 33%
S.M. MWANGI
FOR: DIRECTOR OF METEOROLOGICAL SERVICES
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