| 2004-12-26 | White Christmas snow for coastal Texas. 26 December snow along East Coast with mesoscale bands. This case offers an evaluation of the Short-term ensemble forecast models performance on this event as well as snowfall data and imagery. |
| 2004-12-23 | Cold frontal rainband ahead of second arctic surge of the winter. Locally heavy rains in southeastern areas with 2-3 inch rainfall. Broken-S on radar too. |
| 2004-12-20 | Arctic outbreak of 19-21 December 2004 and overforecast storm along the coast. MREF and SREF case examples. |
| 2004-12-01 | Post cold frontal high wind event of 01 December 2004. Show the impact of the dry slot with area of high winds. |
| 2004-11-25 | Frontal rainbands and thunderstorms producing wind damage on Thanksgiving. |
| 2004-11-12 | Early season snow for PA and southern New England. |
| 2004-11-04 | Advisory level high wind event of 4 November 2004. |
| 2004-10-20 | Negative NAO led to anomalous ridge in Canada. Surface anticylone dominated and low-clouds and cool weather persisted for nearly a week. |
| 2004-09-28 | Heavy rains over southeastern Pennsylvania and very heavy rains in Delaware Valley from the remnants of Hurriane Jeanne, the rain-making machine. |
| 2004-09-17 | Blow down associated with the remnants of Ivan. |
| 2004-09-17 | Blow down associated with the remnants of Ivan. |
| 2004-09-17 | Hurricane Ivan overview. Floods...wind...rain.
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| 2004-09-09 | Hurricane Frances flooding in west and central Pennsylvania. Also listed under tropical storms. |
| 2004-09-09 | Heavy rains associated with Hurricane Frances over Pennsylvania. Eta and GFS models also compared in this wet event.
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| 2004-08-04 | Storm maps and damage pictures of the 4 August tornado event. |
| 2004-08-04 | Long-lived mesocyclones and a bow echo which produced multiple tornadoes in Cumberland, Dauphin, and Lancaster Counties on a Wednesday afternoon.
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| 2004-07-27 | Lancaster F1 tornado south of Willow Street. |
| 2004-07-14 | Campbelltown, Lebanon County F3 tornado.
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| 2004-07-04 | 4th of July non-tornadic event.
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| 2004-07-01 | Large hail producing storm with some tree damage in Lebanon and Lancaster Counties. |
| 2004-06-17 | Severe weather event of 17 June 2004. This event had 3 tornadoes associated with persistent, rotating thunderstorms.
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| 2004-06-05 | Late season coastal storm, more like a winter storm, with moderate rainfall.
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| 2004-05-26 | Supercell over Centre County developed into a spear-head echo and produced damage as it moved eastward. |
| 2004-05-25 | Severe weather event with persistent and damaging winds in Elk-Cameron County. This storm was the same one that produced tornado damage Crawford County. |
| 2004-05-21 | MCC event with flooding and severe weather. Early in event one supercell produced severe weather in Clearfield County.
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| 2004-05-18 | Modest shear day with minor severe weather and flooding. Another Great Valley bow echo. |
| 2004-05-09 | Mothers Day flood in York County. |
| 2004-05-07 | Multiple MCS passage over Pennsylvania with an MCV. Bow echo with the second MCV interacted with the terrain and produced many reports of severe weather. |
| 2004-05-07 | Supercell with first MCS of 7 May that no verification of severe weather was available for. |
| 2004-04-27 | Late season cool snap with snow. Measureable late season snow in the higher elevations of southwestern Pennsylvania. |
| 2004-04-17 | Late April Heat event with temperatures in the 80s for 3 consecutive days.
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| 2004-03-19 | Banded snowfall from Wisconsin to New York City. Good east-west band of snow on KCCX radar. |
| 2004-03-16 | Banded snowfall from Iowa to New York. Heavies snow in Iowa and central NY State. |
| 2004-02-06 | Winter storm of 6 February. Produce snow which turned to sleet and freezing rain. Most locations rose above freezing during the daylight hours of the sixth. Some flooding observed with the event. |
| 2004-02-02 | Southern stream storm that brought snow from Oklahoma to Michigan and then snow to Pennsylvania and the northeast. Marginal temperaters were in the model forecasts. Central Pennsylvania saw a band of 10-14 inches of snow on Tuesday 3 February. |
| 2004-01-25 | Series to two storms that brought heavy snow to the Midwest and northeastern United States. |
| 2004-01-14 | Fast moving clipper that produced unusually heavy snow. It also ushered in reinforcing cold air to help prolong the long cold snap. |