Question: When was the most rainfall in the city where KRMP is located?

full_context: Document 1: Oklahoma City: With 19.48 inches of rainfall, May 2015 was by far Oklahoma City's record-wettest month since record keeping began in 1890. Across Oklahoma and Texas generally, there was record flooding in the latter part of the month
Document 2: KPKR: KPKR (95.7 FM, "95.7 Jack FM") is an American radio station licensed to serve the community of Parker, Arizona. The station, established in 2008, is currently owned by River Rat Radio, LLC. It broadcasts a variety hits music format to the greater Lake Havasu City, Arizona, area.
Document 3: KKDA-FM: KKDA-FM, known as K104, has been a leading radio station in the Dallas–Fort Worth metroplex for 46 years. It is a longtime heritage Urban Contemporary formatted station that broadcasts on 104.5 MHz. It is owned by Service Broadcasting Corporation alongside KRNB and its former AM counterpart KKDA AM. Its studios are located in Arlington, Texas, and the transmitter site is in Cedar Hill.
Document 4: KXXY-FM: KXXY-FM (96.1 FM, "96.1 KXY") is a country music formatted radio station serving the Oklahoma City area and is owned by iHeartMedia, Inc.. KXY was the flagship station of the Oklahoma City Barons hockey team before they left Oklahoma City. Its transmitter is located in Northeast Oklahoma City, and studios are located at the 50 Penn Place building on the Northwest side.
Document 5: KIPR: KIPR (92.3 FM, "Power 92 Jams") is a commercial radio station carrying an urban contemporary format located in Little Rock, Arkansas and licensed to Pine Bluff. It is owned by Cumulus Media. The station's studios are located in West Little Rock, and the transmitter tower is located in Jefferson, south of Pine Bluff. Due to the transmitter location emitting 100 kilowatts, the signal covers most of Central Arkansas including places like Brinkley, North Little Rock, Gould, Fordyce and Dumas.
Document 6: Oklahoma: All of the state frequently experiences temperatures above 100 °F (38 °C) or below 0 °F (−18 °C), though below-zero temperatures are rare in south-central and southeastern Oklahoma. Snowfall ranges from an average of less than 4 inches (10 cm) in the south to just over 20 inches (51 cm) on the border of Colorado in the panhandle. The state is home to the Storm Prediction Center, the National Severe Storms Laboratory, and the Warning Decision Training Branch, all part of the National Weather Service and located in Norman. Oklahoma's highest recorded temperature of 120 °F (49 °C) was recorded at Tipton on June 27, 1994 and the lowest recorded temperature of −31 °F (−35 °C) was recorded at Nowata on February 10, 2011.
Document 7: WKY: WKY (930 AM) is a radio station located in Oklahoma City and is under ownership of Cumulus Media. Its studios are in Northwest Oklahoma City, and the transmitter and 1 tower are located on E. Britton Road in Oklahoma City.
Document 8: KGTO: KGTO (1050 AM, "Heart & Soul 99.1 & 1050") is a radio station licensed to serve Tulsa, Oklahoma. The station is owned by Perry Publishing and Broadcasting and licensed to KJMM, Inc. It airs an Urban Adult Contemporary music format. Its studios are located in the Copper Oaks complex in South Tulsa.
Document 9: Oklahoma City: Oklahoma City has a very active severe weather season from March through June, especially during April and May. Being in the center of what is colloquially referred to as Tornado Alley, it is prone to especially frequent and severe tornadoes, as well as very severe hailstorms and occasional derechoes. Tornadoes have occurred in every month of the year and a secondary smaller peak also occurs during autumn, especially October. The Oklahoma City metropolitan area is one of the most tornado-prone major cities in the world, with about 150 tornadoes striking within the city limits since 1890. Since the time weather records have been kept, Oklahoma City has been struck by thirteen violent tornadoes, eleven F/EF4s and two F/EF5. On May 3, 1999 parts of southern Oklahoma City and nearby suburban communities suffered from one of the most powerful tornadoes on record, an F5 on the Fujita scale, with wind speeds estimated by radar at 318 mph (510 km/h). On May 20, 2013, far southwest Oklahoma City, along with Newcastle and Moore, was hit again by a EF5 tornado; it was 0.5 to 1.3 miles (0.80 to 2.09 km) wide and killed 23 people. Less than two weeks later, on May 31, another outbreak affected the Oklahoma City area, including an EF1 and an EF0 within the city and a tornado several miles west of the city that was 2.6 miles (4.2 km) in width, the widest tornado ever recorded.
Document 10: KRMP: KRMP (1140 AM) is an urban adult contemporary radio station in Oklahoma City, Oklahoma. The station is owned by The Perry Broadcasting Company. The station's studios are located at Perry Plaza II in the Eastside district of Northeast Oklahoma City, and the transmitter site is in the Southeast side of the city.
Document 11: Oklahoma: Because of Oklahoma's position between zones of differing prevailing temperature and winds, weather patterns within the state can vary widely over relatively short distances and can change drastically in a short time. As an example, on November 11, 1911, the temperature at Oklahoma City reached 83 °F (28 °C) in the afternoon (the record high for that date), then an Arctic cold front of unprecedented intensity slammed across the state, causing the temperature to crash 66 degrees, down to 17 °F (−8 °C) at midnight (the record low for that date); thus, both the record high and record low for November 11 were set on the same date. This type of phenomenon is also responsible for many of the tornadoes in the area, such as the 1912 Oklahoma tornado outbreak, when a warm front traveled along a stalled cold front, resulting in an average of about one tornado per hour over the course of a day.
Document 12: Oklahoma City: The city is roughly bisected by the North Canadian River (recently renamed the Oklahoma River inside city limits). The North Canadian once had sufficient flow to flood every year, wreaking destruction on surrounding areas, including the central business district and the original Oklahoma City Zoo. In the 1940s, a dam was built on the river to manage the flood control and reduced its level. In the 1990s, as part of the citywide revitalization project known as MAPS, the city built a series of low-water dams, returning water to the portion of the river flowing near downtown. The city has three large lakes: Lake Hefner and Lake Overholser, in the northwestern quarter of the city; and the largest, Lake Stanley Draper, in the sparsely populated far southeast portion of the city.
Document 13: Oklahoma City: Oklahoma City was home to several pioneers in radio and television broadcasting. Oklahoma City's WKY Radio was the first radio station transmitting west of the Mississippi River and the third radio station in the United States. WKY received its federal license in 1921 and has continually broadcast under the same call letters since 1922. In 1928, WKY was purchased by E.K. Gaylord's Oklahoma Publishing Company and affiliated with the NBC Red Network; in 1949, WKY-TV (channel 4) went on the air and later became the first independently owned television station in the U.S. to broadcast in color. In mid-2002, WKY radio was purchased outright by Citadel Broadcasting, who was bought out by Cumulus Broadcasting in 2011. The Gaylord family earlier sold WKY-TV in 1976, which has gone through a succession of owners (what is now KFOR-TV is currently owned by Tribune Broadcasting as of December 2013).
Document 14: Oklahoma City: Oklahoma City is on the I-35 Corridor and is one of the primary travel corridors into neighboring Texas and Mexico. Located in the Frontier Country region of the state, the city's northeast section lies in an ecological region known as the Cross Timbers. The city was founded during the Land Run of 1889, and grew to a population of over 10,000 within hours of its founding. The city was the scene of the April 19, 1995 bombing of the Alfred P. Murrah Federal Building, in which 168 people died. It was the deadliest terror attack in the history of the United States until the attacks of September 11, 2001, and remains the deadliest act of domestic terrorism in U.S. history.
Document 15: United Kingdom weather records: Duration Level Location Date Highest 5 - min total Approx. 32 mm Preston, Lancashire 10 August 1893 Highest 30 - min total 80 mm Eskdalemuir, Dumfries and Galloway 26 June 1953 Highest 60 - min total 92 mm Maidenhead, Berkshire 12 July 1901 Highest 90 - min total 117 mm Dunsop Valley, Lancashire 8 August 1967 Highest 120 - min total 155 mm Hewenden Reservoir, West Yorkshire 11 June 1956 Highest 155 - min total 169 mm Hampstead, London 14 August 1975 Highest 180 - min total 178 mm Horncastle, Lincolnshire 7 October 1960 Highest 24 - hour total (1800 - 1800) 341.4 mm Honister Pass, Cumbria 5 December 2015 Highest 24 - hour total (0900 - 0900) 279 mm Martinstown, Dorset 18 July 1955 Highest 48 - hour total (0900 - 0900) 405 mm Thirlmere, Cumbria 4 to 5 December 2015 Highest 72 - hour total (0900 - 0900) 456.4 mm Seathwaite, Cumbria 17 to 19 November 2009 Highest 96 - hour total (0900 - 0900) 495 mm Seathwaite, Cumbria 16 to 19 November 2009 Highest Monthly Total 1396.4 mm Crib Goch, Snowdon 1 to 31 December 2015
ground_truth: May 2015
sub_queries: What city is KRMP located? Answer: Oklahoma City
When was the most rainfall for Oklahoma City ? Answer: May 2015