Cold Front Moving Through the Northeast U.S. Monday; Atmospheric River to Impact the Pacific Northwest Midweek

A cold front will cross the Great Lakes and Northeast U.S. through Monday with gusty winds and areas of rain showers. A strong atmospheric river is expected to move into the Pacific Northwest by midweek bringing a threat for moderate to heavy rainfall, gusty winds, and mountain snows for parts of Washington, Oregon, northern California, and the Sierra Nevada. Read More >

Summary
Fast Facts
Precipitation Maps
Storm Reports
mPING Reports
Storm Photos

Summary

A strong upper level low moved over the Southern and Central Plains region during the day on Sunday, December 14, 2014. Adequate moistening and sunshine allowed for modest instability to build within a narrow corridor across central Oklahoma. Isolated thunderstorms developed along a Pacific front/dryline feature during the mid afternoon hours. These storms occasionally exhibited supercell characteristics, producing large hail and funnel clouds. One very brief tornado occurred over northeastern Oklahoma County near Arcadia Lake. No damage or injuries occurred.

Upper Air Sounding for Norman, OK at 6 PM CST on December 14, 2014

Fast Facts

A weak tornado touched down briefly 4 miles southwest of Arcadia, OK in Oklahoma County at 5:09 PM CST. No damaged was observed and no injuries or fatalities were reported with this tornado.

The tornado near Arcadia was the 25th tornado to be documented during the month of December since 1950.

This was the 16th tornado to be documented for 2014 in Oklahoma. The record low annual total of tornadoes for Oklahoma is 17 and was set in 1988.

A funnel occurred near Apache, OK in Caddo County. No circulation on the ground or damage was observed with this storm.

Web Pages and Reports Related to the December 14, 2014 Event

Storm Prediction Center Storm Reports for December 14, 2014

SPC Severe Weather Event Review for December 14, 2014

Precipitation Maps

The following two graphics show the multi-sensor precipitation estimates (MPE) for the 24-hour period ending at 6 PM CST on December 15, 2014. Rainfall reports for the event generally ranged from about 0.25 to 1.50 inches in the NWS Norman forecast area. One interesting aspect of these rainfall maps is that tracks of individual thunderstorms can be identified where the heavier streaks of precipitation occur in the maps.

Storm Reports

Preliminary Storm Reports for 12/14/2014 Compiled by the Storm Prediction Center

NWUS54 KOUN 150408
LSROUN

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE NORMAN OK
1007 PM CST SUN DEC 14 2014

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0347 PM     HAIL             CHICKASHA               35.04N 97.94W
12/14/2014  E1.25 INCH       GRADY              OK   TRAINED SPOTTER

0348 PM     HAIL             2 N CHICKASHA           35.07N 97.94W
12/14/2014  E1.25 INCH       GRADY              OK   STORM CHASER

0350 PM     HAIL             3 N CHICKASHA           35.09N 97.94W
12/14/2014  E2.00 INCH       GRADY              OK   TRAINED SPOTTER

0426 PM     HAIL             6 WSW OKLAHOMA CITY     35.43N 97.61W
12/14/2014  E1.00 INCH       OKLAHOMA           OK   BROADCAST MEDIA

0435 PM     HAIL             4 W OKLAHOMA CITY       35.47N 97.58W
12/14/2014  E1.50 INCH       OKLAHOMA           OK   TRAINED SPOTTER

            I-40/I-44 INTERCHANGE

0445 PM     HAIL             OKLAHOMA CITY           35.47N 97.51W
12/14/2014  E1.75 INCH       OKLAHOMA           OK   BROADCAST MEDIA

            DOWNTOWN OKC, PLAZA DISTRICT

0447 PM     HAIL             OKLAHOMA CITY           35.47N 97.51W
12/14/2014  E2.00 INCH       OKLAHOMA           OK   PUBLIC

            DOWNTOWN PLAZA DISTRICT, REPORT VIA SOCIAL MEDIA

0456 PM     HAIL             4 SE EDMOND             35.61N 97.43W
12/14/2014  E1.00 INCH       OKLAHOMA           OK   BROADCAST MEDIA

            COVERING GROUND AT I-35 AND KILPATRICK TURNPIKE
            INTERCHANGE

0502 PM     HAIL             5 SE EDMOND             35.60N 97.41W
12/14/2014  E1.75 INCH       OKLAHOMA           OK   NWS EMPLOYEE

            NEAR 122ND AND AIR DEPOT BLVD

0509 PM     TORNADO          4 SW ARCADIA            35.62N 97.38W
12/14/2014                   OKLAHOMA           OK   BROADCAST MEDIA

            KWTV VIDEO. LASTED LESS THAN A MINUTE. NO DAMAGE.

0600 PM     TSTM WND GST     CENTRAHOMA              34.61N 96.34W
12/14/2014  E65.00 MPH       COAL               OK   PUBLIC

            RELAYED BY KTEN TV.


&&

$$

mPING Reports

The following two graphics are screen captures showing 2-hour durations of hail and other weather reports across the NWS Norman forecast area and the OKC metro area from 4-6 PM CST on December 14, 2014. These reports came from various people using the mPING application on their mobile devices. The Meteorological Phenomena Identification Near the Ground (mPING) is a project designed to collect weather information from the public through their smart phone or mobile device with GPS location capabilities. For more information, please visit the mPING website at:

https://mping.nssl.noaa.gov/

Note: the white circle depict hail size reports. The numeral on the circle is a code that corresponds to a specific hail size. "1" represents a hail size of 0.25"; "2" represents a hail size of 0.50"; "3" represents a hail size of 0.75"; etc.

This map shows a 2-hour duration of mPING Reports in the NWS Norman forecast area.

This map shows a 2-hour duration of mPING Reports in the OKC metro area.

Storm Photos

Hailstone in Dowtown OKC Photo courtesy Megan Jester	Photo courtesy Jason Collins
Hailstones in the OKC Plaza District Photo courtesy Dustin Akers	Hailtone near NW 10th & Penn in OKC Photo courtesy Curtis Schwab