* Hungarian May inflation rises to 7.0 pct, above forecasts, increasing the chance of higher interest rates
* Slovak May inflation hits 20-month high at 4.6 pct, April trade balance shows surprise deficit
* Romanian May inflation dips to 8.5 pct, but seen rising
* Czech output jumps, seen slowing, Slovak trade worsens
By Michael Winfrey
PRAGUE, June 11 (Reuters) - More expensive food and fuel drove eastern European inflation in May and increased the pressure on the region's central banks to continue tightening monetary policy.
Hungary's inflation accelerated sharply to a higher than expected 7.0 percent, Slovakian inflation leapt to a 20-month high and in Romania it eased slightly, though analysts said it had yet to peak.
Soaring commodity prices are lifting consumer prices around the world and making it more and more difficult for central bank policymakers struggling to keep growth alive in a global slowdown.
Currency strength in central and eastern Europe has partially kept price growth in check, but analysts are beginning to revise forecasts for policy easing as global factors intensify pressure on central banks.
Hungary's year-on-year inflation <HUCPIY=ECI> rose to 7.0 percent from 6.6 percent in April. It was the first rise in the annual figure in five months and analysts had expected it to stay flat.
The increase comes at a bad time for Hungary which saw a selloff in bonds and the forint <EURHUF=D2> last week after the European Central Bank indicated it was ready to hike rates.
Investors demand a premium for holding riskier assets like Hungary rather than safe eurozone bonds.
The central bank is having a row with the government, which wants more flexibility on inflation targeting to avoid stifling already very weak growth. An expected easing in inflation would probably be delayed.
"We feel disinflation is likely to stall in the coming months," Citibank analyst Eszter Gargyan said in a report.
"Recent hawkish ECB rhetoric and the forint correction increase the likelihood of the NBH continuing its gradual rate hikes in June, especially if the global environment remains negative in the upcoming weeks."
Central bank chief Andras Simor told a Polish paper on Wednesday there was an "equal probability" of the bank keeping rates steady or tightening after its last three moves lifted them 100 basis points to a three-year high of 8.5 percent.
OUTPUT, TRADE FEEL PINCH
Along with higher inflation, the region is starting to feel the pinch of the global slowdown from the euro zone -- its main export customer.
Slovak consumer prices -- although not the key euro zone norm figures followed by the market -- showed a rise 4.6 percent, the highest since early 2006.
But the country also showed a surprise trade deficit of 5.8 billion crowns in April -- compared with expectations of a 2.4 billion crown surplus -- as imports jumped.
There was no breakdown of the data but analysts said the strong crown, which has appreciated 5.5 percent since May when Slovakia's bid to join the euro in 2009 was approved, may be fuelling import growth by consumers, compounding dampening effects on export growth caused by weak euro zone demand.
Next door, Czech industrial output <CZIPY=ECI> jumped in April to a better than expected 12.2 percent, sending the Czech crown <EURCZK=> to 24.400 per euro -- an all time high apart from a freak trade at 23.00 in April.
But analysts said the numbers were largely due to more workdays in April than in 2007 to an earlier than usual Easter holiday. They expected orders to fall later this year.
"We do not change our view that Czech industrial output is going to feel the negative impact of the strong Czech crown and weaker growth in the euro zone in the months to come," said Radomir Jac, chief analyst at PPF asset management.
GLOBAL PRESSURE
The slowdown may eventually temper inflation in eastern Europe which, like other emerging markets, has seen price growth boosted by high commodity prices, surging domestic demand and high economic growth. But not yet.
Romania's inflation <ROCPI=ECI> eased slightly in May to 8.5 percent but still exceeded market forecasts. Analysts said it had yet to peak and, due to strong economic growth of 8.2 percent in the first quarter, the central bank had no reason not to tighten policy.
"The central bank will have no choice but to hike rates (on June 26) given the stronger than economic growth data," said Ionut Dumitru, head of research of Raiffeisen Bank in Bucharest.
The bank has raised rates by 275 basis points to October to bring the cost of borrowing to 9.75 percent. Officials see inflation at around 6 percent at the end of this year, well above the 2.8-4.8 percent target. (Additional reporting by Balazs Koranyi, Radu Marinas, Peter Laca)