One of the most powerful spells in the Protoss arsenal is Psionic Storm of the High Templar, and if used effectively, it can ravage an entire Zerg army in mere seconds. Evading these storms and minimizing damage is a crucial part of the Zerg vs. Protoss match-up.
There is no way to know exactly where the Protoss player will drop storms. However, it is possible to predict roughly where the storms will hit and move units accordingly to minimize the damage. Protoss players will often aim at clumps of units that have bunched up while attacking or defending, or in higher level play, will predict the Zerg's movement and storm in the direction they think will deal the most damage.
Why use it?
In the midgame, the Zerg army often has the advantage in numbers. Using storm, however, a smart Protoss player can turn the odds to his favor quickly by melting the opposing Zerg army with storms. In order to come out on top in a head to head battle with a Protoss ball, a player should utilize some storm dodging to minimize damage done to their army and thus keep their unit advantage throughout the battle. Zerglings often die too quickly from storm to warrant a dodge, but the often-targeted Hydralisk can, with good micro, easily evade storms with minimal losses. One prime target for the Protoss are burrowed Lurkers, as they tend to clump up and cannot move out of the storm until unburrowed, so keep your Lurkers spread out.
Storm dodging comes down to predicting where the Protoss player will throw his storms. Generally, large clumps of units are prime targets, so spreading out your units across a large area helps to mitigate the damage storm will do. Depending on who was the aggressor, the technique to storm dodge will be different.
- If the Protoss charged into your gathered or moving army, it is likely that your units will be clumped up in a ball. A good idea would be to retreat temporarily and split your units up before reengaging the enemy. This also gives you the opportunity to send any reinforcements into battle before your attention must be focused on dodging storms.
- If you attacked the Protoss, look for clumps of units in your attack formation and separate them. If you see storms getting thrown down, immediately retreat your forces backward, then waypoint them back if more storms are being casted by the Protoss. If the Hydralisks are far too spread out and are outside the magic box, do not use waypointing, because they will clump up before returning to battle and their pathing also gets messy.
Additionally, it can sometimes be helpful to watch individual enemy High Templar as they come into storm range, as a bluish-light graphic will emanate from the Templar's head a fraction of a second before a storm cast by them takes effect. This can allow you to micro your units to begin to dodge fractionally earlier.
If your storm dodging has been successful and you come out ahead in a battle, you can choose to either counter the Protoss natural or any of their expansions with fresh units or continue to pump units and expand until Hive Tech.