Alert archive / New Jersey / Morris County
Weather alerts in Morris County, New Jersey, 2009
142 weather alerts in 2009, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Morris County and its neighbors
Each county as a circle sized by its count in 2009. Tap one for its archive.
- Alerts
- 142
- Warnings
- 30
- Watches
- 29
- Advisories
- 40
- Busiest month
- July36 alerts
- Busiest day
- July 29, 20099 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
0 of 1 tornado warnings covering Morris County in 2009 had a tornado report inside them.
Morris County, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 1 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 10 | 4 | 60% | 3 | 100% | 10 min |
| Flash flood warnings | 5 | 1 | 80% | 1 | 100% | 129 min |
Each office's whole area, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Philadelphia/Mount Holly: tornado warnings | 13 | 1 | 92% | 2 | 50% | 38 min |
| NWS Philadelphia/Mount Holly: severe thunderstorm warnings | 235 | 113 | 52% | 260 | 82% | 26 min |
| NWS Philadelphia/Mount Holly: flash flood warnings | 67 | 20 | 70% | 69 | 62% | 85 min |
An office's figures cover every county it serves, including across state lines.
Verified by the Iowa Environmental Mesonet's Cow, which matches each storm-based warning with the local storm reports inside its polygon while it was in force, within 15 km of its edge: a tornado warning counts as verified on a tornado report, a severe thunderstorm warning on hail of 1 inch or more, a gust of 58 mph or more, or wind damage, a flash flood warning on a flash flood report. The false alarm ratio is the share of warnings with no such report; "inside a warning" is the probability of detection, the share of reports that fell inside one; lead time runs from the warning's issue to each report inside it, counting zero for a report that came first. A warning with no report is not proof nothing happened: reports come from spotters, the public and damage surveys, and are thin where few people live.
The alerts
Every alert, in the order issued. Times are local, Eastern Time. Each opens its own page with the text, the map, the radar and the sounding.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jan 5, 3:46 AM EST | Winter Storm Watch | PHI | 25 hr |
| Jan 6, 4:39 AM EST | Winter Storm Warning | PHI | 16 hr |
| Jan 6, 8:55 PM EST | Ice Storm Warning | PHI | 19 hr |
| Jan 7, 12:10 AM EST | Mesoscale Discussion | SPC | 4 hr |
| Jan 7, 6:08 AM EST | Mesoscale Discussion | SPC | 3 hr |
| Jan 7, 8:32 AM EST | Areal Flood Advisory | PHI | 8 hr |
| Jan 9, 4:19 AM EST | Winter Storm Watch | PHI | 11 hr |
| Jan 9, 3:27 PM EST | Winter Storm Warning | PHI | 37 hr |
| Jan 9, 3:27 PM EST | Winter Weather Advisory | PHI | 37 hr |
| Jan 10, 7:58 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Jan 14, 3:34 PM EST | Winter Weather Advisory | PHI | 17 hr |
| Jan 26, 2:42 AM EST | Winter Storm Watch | PHI | 25 hr |
| Jan 27, 3:18 AM EST | Winter Storm Warning | PHI | 40 hr |
| Jan 28, 12:31 AM EST | Mesoscale Discussion | SPC | 5 hr |
| Jan 28, 7:53 AM EST | Mesoscale Discussion | SPC | 5 hr |
| Feb 2, 2:53 PM EST | Winter Weather Advisory | PHI | 37 hr |
| Feb 11, 2:50 PM EST | Wind Advisory | PHI | 13 hr |
| Feb 12, 3:30 AM EST | High Wind Warning | PHI | 16 hr |
| Feb 12, 6:51 PM EST | Wind Advisory | PHI | 5 hr |
| Feb 28, 4:10 AM EST | Winter Storm Watch | PHI | 23 hr |
| Mar 1, 3:30 AM EST | Winter Storm Warning | PHI | 37 hr |
| Mar 2, 12:41 AM EST | Mesoscale Discussion | SPC | 4 hr |
| Mar 23, 4:23 AM EDT | Red Flag Warning | PHI | 19 hr |
| Apr 2, 5:13 AM EDT | Dense Fog Advisory | PHI | 4 hr |
| Apr 3, 3:08 PM EDT | Wind Advisory | PHI | 29 hr |
| Apr 17, 4:35 AM EDT | Red Flag Warning | PHI | 8 hr |
| Apr 19, 2:36 PM EDT | Flood Watch | PHI | 22 hr |
| Apr 28, 10:34 AM EDT | Red Flag Warning | PHI | 9 hr |
| May 7, 3:09 AM EDT | Areal Flood Advisory | PHI | 2 hr |
| May 16, 6:29 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 16, 9:53 PM EDT | Areal Flood Advisory | PHI | 95 min |
| May 18, 4:27 AM EDT | Frost Advisory | PHI | 28 hr |
| May 24, 11:49 AM EDT | Mesoscale Discussion | SPC | 116 min |
| May 24, 7:11 PM EDT | Mesoscale Discussion | SPC | 64 min |
| Jun 4, 2:54 PM EDT | Flood Watch | PHI | 29 hr |
| Jun 9, 12:48 AM EDT | Severe Thunderstorm Warning | PHI | 42 min |
| Jun 9, 2:20 AM EDT | Areal Flood Advisory | PHI | 100 min |
| Jun 9, 6:01 AM EDT | Mesoscale Discussion | SPC | 59 min |
| Jun 9, 8:42 AM EDT | Areal Flood Advisory | PHI | 3 hr |
| Jun 9, 1:49 PM EDT | Flash Flood Watch | PHI | 5 hr |
| Jun 11, 3:15 PM EDT | Flash Flood Watch | PHI | 13 hr |
| Jun 15, 7:48 PM EDT | Severe Thunderstorm Warning | PHI | 28 min |
| Jun 18, 4:55 AM EDT | Flash Flood Watch | PHI | 11 hr |
| Jun 26, 2:19 PM EDT | Mesoscale Discussion | SPC | 56 min |
| Jun 26, 2:42 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 26, 5:27 PM EDT | Severe Thunderstorm Warning | PHI | 78 min |
| Jun 26, 7:33 PM EDT | Mesoscale Discussion | SPC | 57 min |
| Jun 30, 10:57 AM EDT | Mesoscale Discussion | SPC | 93 min |
| Jun 30, 11:37 AM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 30, 2:18 PM EDT | Mesoscale Discussion | SPC | 57 min |
| Jun 30, 4:06 PM EDT | Areal Flood Advisory | PHI | 3 hr |
| Jun 30, 4:25 PM EDT | Mesoscale Discussion | SPC | 65 min |
| Jul 1, 12:03 PM EDT | Mesoscale Discussion | SPC | 87 min |
| Jul 2, 3:38 AM EDT | Areal Flood Advisory | PHI | 3 hr |
| Jul 2, 4:50 AM EDT | Areal Flood Advisory | PHI | 3 hr |
| Jul 2, 3:20 PM EDT | Mesoscale Discussion | SPC | 55 min |
| Jul 7, 11:05 AM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 7, 2:00 PM EDT | Mesoscale Discussion | SPC | 90 min |
| Jul 7, 4:41 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 16, 4:04 PM EDT | Mesoscale Discussion | SPC | 86 min |
| Jul 17, 5:41 PM EDT | Severe Thunderstorm Warning | PHI | 52 min |
| Jul 17, 6:18 PM EDT | Mesoscale Discussion | SPC | 57 min |
| Jul 17, 8:51 PM EDT | Severe Thunderstorm Warning | PHI | 54 min |
| Jul 17, 9:17 PM EDT | Areal Flood Advisory | PHI | 3 hr |
| Jul 17, 9:21 PM EDT | Severe Thunderstorm Warning | PHI | 54 min |
| Jul 26, 3:07 AM EDT | Flash Flood Watch | PHI | 20 hr |
| Jul 26, 3:14 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 26, 3:51 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 26, 4:55 PM EDT | Tornado Warning | PHI | 55 min |
| Jul 26, 6:37 PM EDT | Mesoscale Discussion | SPC | 113 min |
| Jul 26, 9:57 PM EDT | Areal Flood Advisory | PHI | 2 hr |
| Jul 26, 10:06 PM EDT | Mesoscale Discussion | SPC | 54 min |
| Jul 27, 2:20 PM EDT | Mesoscale Discussion | SPC | 55 min |
| Jul 29, 10:15 AM EDT | Flash Flood Watch | PHI | 17 hr |
| Jul 29, 12:22 PM EDT | Mesoscale Discussion | SPC | 23 min |
| Jul 29, 12:49 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 29, 1:30 PM EDT | Areal Flood Advisory | PHI | 3 hr |
| Jul 29, 2:22 PM EDT | Mesoscale Discussion | SPC | 23 min |
| Jul 29, 3:52 PM EDT | Flash Flood Warning | PHI | 4 hr |
| Jul 29, 5:05 PM EDT | Mesoscale Discussion | SPC | 55 min |
| Jul 29, 6:50 PM EDT | Areal Flood Advisory | PHI | 94 min |
| Jul 29, 7:14 PM EDT | Mesoscale Discussion | SPC | 61 min |
| Jul 30, 3:30 PM EDT | Flash Flood Watch | PHI | 27 hr |
| Jul 31, 10:20 AM EDT | Mesoscale Discussion | SPC | 85 min |
| Jul 31, 1:18 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 31, 2:36 PM EDT | Flash Flood Warning | PHI | 4 hr |
| Jul 31, 3:05 PM EDT | Mesoscale Discussion | SPC | 85 min |
| Jul 31, 4:56 PM EDT | Flash Flood Warning | PHI | 114 min |
| Aug 2, 2:19 AM EDT | Flash Flood Watch | PHI | 13 hr |
| Aug 2, 10:01 AM EDT | Mesoscale Discussion | SPC | 119 min |
| Aug 2, 11:18 AM EDT | Flash Flood Warning | PHI | 9 hr |
| Aug 2, 12:27 PM EDT | Severe Thunderstorm Warning | PHI | 48 min |
| Aug 5, 1:46 PM EDT | Severe Thunderstorm Warning | PHI | 59 min |
| Aug 5, 2:45 PM EDT | Severe Thunderstorm Warning | PHI | 75 min |
| Aug 9, 11:57 AM EDT | Flash Flood Watch | PHI | 11 hr |
| Aug 9, 1:56 PM EDT | Heat Advisory | PHI | 30 hr |
| Aug 9, 2:45 PM EDT | Mesoscale Discussion | SPC | 60 min |
| Aug 9, 3:18 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Aug 9, 7:11 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 10, 4:40 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 10, 5:09 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Aug 10, 8:15 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 12, 1:01 PM EDT | Mesoscale Discussion | SPC | 89 min |
| Aug 13, 3:36 AM EDT | Flood Watch | PHI | 36 min |
| Aug 13, 4:12 AM EDT | Flash Flood Watch | PHI | 15 hr |
| Aug 19, 6:05 PM EDT | Mesoscale Discussion | SPC | 55 min |
| Aug 21, 10:01 AM EDT | Mesoscale Discussion | SPC | 119 min |
| Aug 21, 11:28 AM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 21, 1:58 PM EDT | Mesoscale Discussion | SPC | 92 min |
| Aug 21, 2:41 PM EDT | Areal Flood Advisory | PHI | 3 hr |
| Aug 21, 2:47 PM EDT | Flash Flood Watch | PHI | 35 hr |
| Aug 22, 1:40 AM EDT | Areal Flood Advisory | PHI | 3 hr |
| Aug 28, 9:32 AM EDT | Areal Flood Advisory | PHI | 3 hr |
| Aug 28, 2:52 PM EDT | Flash Flood Watch | PHI | 14 hr |
| Oct 4, 2:24 AM EDT | Dense Fog Advisory | PHI | 7 hr |
| Oct 6, 3:19 PM EDT | Wind Advisory | PHI | 29 hr |
| Oct 11, 2:33 AM EDT | Frost Advisory | PHI | 29 hr |
| Oct 13, 4:30 AM EDT | Frost Advisory | PHI | 24 hr |
| Oct 15, 4:03 AM EDT | Winter Weather Advisory | PHI | 31 hr |
| Oct 18, 2:04 PM EDT | Freeze Warning | PHI | 19 hr |
| Oct 24, 7:02 PM EDT | Mesoscale Discussion | SPC | 58 min |
| Oct 24, 7:16 PM EDT | Flash Flood Warning | PHI | 3 hr |
| Nov 27, 3:16 PM EST | Wind Advisory | PHI | 24 hr |
| Dec 3, 5:41 AM EST | Severe Thunderstorm Warning | PHI | 49 min |
| Dec 5, 3:25 AM EST | Winter Weather Advisory | PHI | 19 hr |
| Dec 8, 3:05 AM EST | Winter Weather Advisory | PHI | 30 hr |
| Dec 8, 2:40 PM EST | Flash Flood Watch | PHI | 21 hr |
| Dec 9, 12:00 PM EST | Wind Advisory | PHI | 33 hr |
| Dec 12, 2:29 PM EST | Winter Weather Advisory | PHI | 23 hr |
| Dec 13, 1:50 PM EST | Freezing Rain Advisory | PHI | 4 hr |
| Dec 17, 3:30 PM EST | Winter Storm Watch | PHI | 22 hr |
| Dec 18, 4:40 AM EST | Winter Storm Warning | PHI | 46 hr |
| Dec 19, 12:27 PM EST | Mesoscale Discussion | SPC | 6 hr |
| Dec 19, 7:25 PM EST | Mesoscale Discussion | SPC | 5 hr |
| Dec 24, 3:04 PM EST | Freezing Rain Advisory | PHI | 42 hr |
| Dec 26, 7:10 PM EST | Areal Flood Advisory | PHI | 8 hr |
| Dec 27, 8:41 AM EST | River Flood Warning | PHI | 33 hr |
| Dec 27, 9:28 AM EST | River Flood Warning | PHI | 11 hr |
| Dec 27, 8:13 PM EST | River Flood Warning | PHI | 51 hr |
| Dec 28, 1:42 PM EST | Wind Advisory | PHI | 27 hr |
| Dec 31, 3:22 AM EST | Winter Weather Advisory | PHI | 8 hr |
| Dec 31, 6:46 PM EST | Winter Weather Advisory | PHI | 6 hr |
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
| Product | Alerts |
|---|---|
| Severe storms | |
| Severe Thunderstorm Warning | 10 |
| Tornado Warning | 1 |
| Severe Thunderstorm Watch | 9 |
| Mesoscale Discussion | 43 |
| Flooding | |
| Flash Flood Warning | 5 |
| River Flood Warning | 3 |
| Flash Flood Watch | 12 |
| Flood Watch | 3 |
| Areal Flood Advisory | 16 |
| Winter | |
| Ice Storm Warning | 1 |
| Winter Storm Warning | 5 |
| Winter Storm Watch | 5 |
| Freezing Rain Advisory | 2 |
| Winter Weather Advisory | 9 |
| Heat | |
| Heat Advisory | 1 |
| Cold | |
| Freeze Warning | 1 |
| Frost Advisory | 3 |
| Wind and dust | |
| High Wind Warning | 1 |
| Wind Advisory | 7 |
| Fire | |
| Red Flag Warning | 3 |
| Fog and smoke | |
| Dense Fog Advisory | 2 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20082010
Sources
National Weather Service watches, warnings, advisories and statements from the Iowa Environmental Mesonet's VTEC archive, which reconstructs tornado, severe thunderstorm, flash flood and marine warnings back to 1986 from the NWS text archive. Storm Prediction Center watches and mesoscale discussions from SPC's archive through the Mesonet. County centers from the US Census Bureau. Warning verification from the Mesonet's Cow. Rebuilt daily.