Widespread rainfall alert for Pakistan – Special Coverage!

The special coverage of “widespread rainfall alert” by the Pakistan Weather Portal (PWP) is over!

  • Flash/Urban flooding

  • Two strong eastern systems

  • One strong western trough

After experiencing a dull start to the monsoon of 2011, Pakistan is all set to get proper monsoon rainfalls that it used to get every year. Some parts of Pakistan had received above average rainfall while many parts faced below average rainfall. Early this year the United Nations (U.N) had published a report that suggested that probability of floods this year are high due to lack of construction in last year’s flood-hit regions, later a report from Oxfam international also reported the same things. But this year the monsoon rainfall were not active like last year mainly due to the lack of weather systems from the Bay of Bengal. Upper Pakistan has got showers due to the interaction between western troughs and monsoon moisture where as last year it was the interaction between strong western disturbance and a strong low pressure from the Bay of Bengal that created havoc in the country and later devastating floods sank 20% land of Pakistan. Now these same conditions are erupting as a strong low pressure is in making and a strong trough of western disturbance is over Afghanistan. Will history repeat itself? 

PWP upgraded its second monsoon forecast from ” very high” to “extremely high” in Sindh, PWP on July 29 forecasted monsoonal activity in Sindh in August. PWP upgrades third monsoon spell for Sindh from “moderate” to “high”, PWP forecasted the third spell on August 4.  Pakistan Weather Portal (PWP) is 75% confident with this forecast after observing different meteorological factors. But we may revise our third monsoon rainfall for Sindh.

Updates regarding Severe weather

PWP's map showing the track of two expected weather system

All the new updates will be issued below;

Update issued on August 10 at 7:00 pm PST – LAST UPDATE

Yesterday’s low pressure area is over South Rajasthan and adjoining North-western Gujarat, it will enter Sindh on August 10 late or August 11 morning, the low pressure may intensify further into a well-marked low pressure area in 48 hours.

Under the influence of this strong weather system, widespread heavy rainfall to very heavy rainfall likely across Sindh especially south-eastern Sindh (Mirpur Khas, Badin and adjoining cities), while heavy rainfall likely in coastal Sindh  too (Karachi, Thatta and Keti Bandar), overall the winds will be strong (56 to 60 km/h).

Update issued on August 10 at 2: 30 pm PST 

Heavy downpour expected in 48 hours across Sindh

Yesterday’s low pressure area is over south Rajasthan now, it is likely to move into Sindh on August 10 late or August 11 mid-day/ (change has again occurred in its arrival date), the low pressure may intensify into a well-marked low pressure in next 48 hours.It will move to and fro over Sindh again as forecasted eariler.

Under the influence of this strong weather system, widespread heavy rainfall to very heavy rainfall likely across Sindh especially south-eastern Sindh (Mirpur Khas, Badin and adjoining cities), while heavy rainfall likely in coastal Sindh  too (Karachi, Thatta and Keti Bandar), overall the winds will be strong (60 km/h), due to severe rainfall in Sindh, chances of flooding is likely. Rains as of latest forecast will start from today (have started in most parts)and last till August 14. While chances of rainfall in Karachi from evening (August 10).

Update issued on August 9 at 7:00 pm PST

“Chances of flooding in Sindh during the weekend”

Yesterday’s low pressure area is now over Madya Pradesh and adjoining Rajasthan, it has absorbed the upper air cyclonic circulations over Rajasthan and adjoining Punjab. The weather system will further intensify into a well-marked low pressure in next 48 hours, after that it might further intensify into a depression due to change in track the rains have been delayed in Sindh but not vanished.

The system will move from south-eastern to central to coastal Sindh and eventually head to Makran coast as it will be in dissipating stages on August 16. The system might enter Sindh on August 12 now instead of previous dates. Under the influence of this weather system very heavy rainfall likely in Mirpur Khas, Badin, Umerkot and other towns and cities of south-eastern Sindh with very strong gusty winds (60 km/h). While heavy rainfall with strong gusty winds likely coastal cities of Sindh that is Karachi, Thatta and other adjoining cities. Hyderabad will also get rain during this period. The rains will now start from August 12 morning till August 15 mid-day. The system could drop heavy sheets of rainfall in Sindh, thus chances of flooding in Sindh during the weekend. Light to moderate showers might occur on August 10 in different parts of Sindh mostly south-eastern Sindh.

Update issued on August 9 at 2:00 pm PST

Yesterday’s low pressure over north-west Mayda Pradesh it will further intensify into a well-marked low pressure in few days. Its track has changed since yesterday. It is likely to approach south-eastern Sindh on August 10/August 11, where it may further intensify. The system might will move to and fro over Sindh from August 10 till August 14 night, with strong intensity, during the period it will move towards upper Sindh then again to south-eastern Sindh and eventually from coastal Sindh to Makran coast on August 15.

Under the influence of this weather system, widespread rainfall with isolated very heavy rainfall with strong gusty winds (50 km/h to 60 km/h) likely in Sindh especially Mirpur Khas and Badin. Heavy rainfall also likely in coastal Sindh including Karachi from August 10 till August 14 night with few gaps. The system will head towards Makran coast on August 15.

Update issued on August 8 at 10:00 pm PST

Low pressure over north-west Madya Pradesh persists, it may further intensify into a well-marked low pressure in next few days. It will follow a NW track towards upper Sindh and adjoining south Punjab instead of SW track. However change in track may occur in 24 hours after that no change likely.

Under the influence of this weather system, heavy to very heavy rainfall likely in upper and some parts of south-eastern Sindh including Sukkur. While the intensity of the rain will be heavy in coastal Sindh including Karachi. Winds are likely to be strong especially in upper and south-eastern Sindh where some wind storms may occur. Rains will start from August 10 and continue till August 14.

Update issued on August 8 at 3:00 pm PST

Yesterday’s UAC over Utter Pradesh has intensified into a low pressure area at present it is over north-west Madya Pradesh and adjoining areas of Utter Pradesh. The low pressure will further intensify into a well-marked low pressure area (strong weather system) before reaching Pakistan, it will maintain its intensity for few days. The system is now likely to move in a west direction according to GFS (towards south-eastern and Upper Sindh), instead of south-eastern Sindh and coastal Sindh to Makran coast.

Under the influence of this weather system, heavy to very heavy rainfall with very strong gusty winds likely across Sindh from August 10 to August 12 night/August 13 mid-day.

Update issued on August 7 at 9:00 pm PST

The upper air cyclonic circulations (UAC) over Utter Pradesh is likely to intensify into a low pressure in next 2 days (August 8 or August 9) now, it will acquire a south-west track before reaching Sindh on August 10/August 11. Certain models suggest it to intensify into depression, but it is more likely to become a low pressure or well-marked low.

Under the influence of this weather system, heavy to very heavy rainfall with strong gusty winds likely in Sindh from August 10 to August 12 night/August 13 mid-day.

Features of the weather systems

Below is the features of these weather systems (they may change as time passes by);

First low pressure

Most maps showing 200 mm rainfall in south-eastern Sindh.

An upper air cyclonic circulations formed in the central Bay of Bengal on July 28 that moved to north-west Bay of Bengal the same day, the UAC persisted over the north-west region of the Bay for many days. On August 2, the UAC moved to northern part of Bay of Bengal but the other day it once again headed to north-west Bay. After many days of stationary movement, the UAC on August 4 crossed the Orissa coast and late that day it entered Chhattisgarh. On August 5, the UAC moved to Utter Pradesh and the other day it moved to south-east Utter Pradesh. The UAC is currently moving in south-west direction after moving in a westwards direction. The Upper air cyclonic circulations are forecasted to intensify further, it will move from Utter Pradesh to Gujarat via Rajasthan and enter Sindh by August 11 morning/evening, it will completely enter Sindh on August 12 evening. It is very likely that this UAC will start to gain intensity to become a low pressure/well-marked low pressure on its way to Sindh. Very few models had went so far in suggesting that it would become a depression over land, that is something that is extremely rare. Overall the intensity of this system will be very strong.

Trough of western disturbance

On August 4, a western trough over the Afghanistan started moving towards Pakistan slowly, on August 5 it gained intensity and moved to north-east Afghanistan. It is currently moving in westwards towards Upper Pakistan. Interaction between western trough and strong monsoon moisture will take place in coming week in Upper Pakistan as forecasted by Pakistan Weather Portal (PWP)

Second low pressure

Although it is too early to go in detail about this weather system but what PWP had observed about this system, PWP will share with its readers;

An upper air cyclonic circulations form over the Bay of Bengal and move inland on August 14 to Madya Pradesh, it will also move westwards. If it behaves as forecasted then it will bring the third spell to Sindh, if it is the opposite that no third monsoon rainfall in Sindh. Few days back, various meteorological parameters observed by the PWP showed that it will become a strong weather system (Low pressure) over Madya Pradesh and head towards South Punjab and upper Sindh. Whenever it forms or what ever track it selects, PWP will give updates.

This coverage will continue as long as chances of severe weather persist, it may also be canceled if conditions changes.

638 replies to “Widespread rainfall alert for Pakistan – Special Coverage!”

  4. yar muje to traviyo aik dam se itni tez hwa lag rhi thi andhi thi full aur uske badd bahrishhhh tez ho gai

  5. It was awesome… really…loved every bit of it….the best part was that it took all of us by surprise.. we all were almost hopeless but just when we started thinking that its not gona rain here in Karachi this storm developed.

    I am not too sure if it would carry on for long though, however, do watch out for a couple of thunderstorm on sunday afternoon.

    In the end, Congratulations to all Rain Lovers, Cheers.

    regards,
    Mujtaba

  6. whats ur view on what actually caused this rain/thunderstorm? was it the same system that poured heavy rains in interior sindh or was it any other system?
    Also evrybody is saying about the third spell after one week. what is the basis of that? Has there any system developed in BOB?

  7. There was a UAC over jhakand on 10th of august and it is expected to move westwards t0wards Sindh. Thus, bringing rains to Karachi. That would be the third spell if it c0mes to Karachi

    1. when it will enter to sindh and khi……. and what about its intensity…. will it increase?

  8. The third spell depends up0n the trAck of the UAC, it might also m0ve t0wards South Punjab instead of Sindh. The UAC is also expected to intensify into a str0ng weather system(Low Pressure).

  10. BBC n0w sh0wing thundery sh0wer today.
    The thundercell that caused rain, dissipated.
    N0w an0ther thundercell has f0rmed near Hyderabad.

  17. High possibility of a developement of a thundercell over Karachi as the wind are WNW and the humidity and heat is higher than yesterday.

  20. yaar han i think its cumulonimbus clouds….. yaaar pure moonsoon east se clouds ate howe nahin dekhe aaaj dekhe yaaar

  21. These are n0t cumulonimbus clouds. These are nimbus clouds.
    If condotions bec0me m0re favourable then these clouds can transform into cumulonimbus clouds.

  23. Temperature is 34C n0w and the winds are NW but humidity has to increase. Current humidity is 56%.

  30. Yeah!!!! The humidity is increasing… Conditions are becoming moe favourabe for thunderstorm

  33. u guys seem to be very optimistic.. I like that. lets wait and watch

    But as far as my opinion is concerned, its nothing at the moment, Wind is also West or WSW….
    BBC still showing Thundery Showers for today though.

  34. yar barish raat main hi ho gi ya evening main.80% monsoon ki barishain raat main hoti hain,koi batai ga kai iski kiya wajha hai…….

  36. thunder storms burst in evening or night ,but if there is a low pressure it can rain any time

  38. when will it rain….
    HUMIDITY IS 93%
    no air moving
    heat gaining strength
    CHANCE OF CLOUDBURST ANY TIME….

  41. yaaar volcano smoke jaise clouds dikh rahe hain east main….. i m sure that these are cumulonimbus…… yaar ALLAH miyan barish de… yaaar pure moonsoon main ab dekhe east se cloud

  54. yaaaaaaar what u people say yaarrrrrr….. how much chances of rain in these conditions???? plz tell me

  55. man clouds are heavy but they r at a distance from defence what about gulshan reply people

  63. yaaaaaaar what u people say yaarrrrrr….. how much chances of rain in these conditions???? plz tell me

  70. Wel welll well….it rained.. but just for 10 minutes. Alot of thunder was there but it actually rained for just 10 minutes here at University Road..
    Now sky is clearing and i dont see any further rain :(

  71. guysss dark clouds coming from north and winds blowing from north :) can anyone tell me if it’s raining?

  78. rain stopped after 10 mins…i think this system is not so strong to give heavy rains in khi..

  80. @zulfi :

    This system was very str0ng bc0z i saw very strong cumulonimbus clouds today but something must’ve caused it to dissipate.

  92. How selfish and ignorant could you lot actually be?

    The owner of this blog has been absent for a couple of days now and not even a single one of you is courteous enough to enquire of his whereabouts. All I see is, rain, no rain, rain, no rain.. At least one of you should be in touch with him via email/facebook/mobile. And that one person should have the audacity to bring an update about him..

    Babar, I pray that you and your loved ones are safe and sound, inshAllah. Whatever reason you haven’t been around for, I genuinely pray that it’s nothing serious and you’ll be back soon.

    Regards.

  93. Monsoon rainfall since June 1 till August 15 in few cities: 1. Islamabad got 1,337 mm 2. Karachi got 74.2 mm 3. Lahore got 974 mm 4. Hyderabad got 150 mm

    1. moisture incursion will take place, that will cause some thunderstorms to form over Sindh…. overall fresh monsoonal activity likely in coming days in Pakistan…

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