Weather alerts in Arkansas, 2016
2,502 weather alerts in 2016, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered any part of the state, so the counties below add up to more than the state.
Weather alerts by county
Each county as a circle sized by its count in 2016. Tap one for its archive.
- Alerts
- 2,502
- Warnings
- 1,025
- Watches
- 88
- Advisories
- 317
- Busiest month
- March602 alerts
- Busiest day
- March 31, 2016123 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
17 of 79 tornado warnings covering Arkansas in 2016 had a tornado report inside them; 19 of 27 tornado reports fell inside a warning, on average 12 minutes after it went out.
Arkansas, 2016
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 79 | 17 | 78% | 27 | 70% | 12 min |
| Severe thunderstorm warnings | 526 | 194 | 63% | 398 | 81% | 24 min |
| Flash flood warnings | 214 | 74 | 65% | 134 | 86% | 154 min |
Each office's whole area, 2016
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Jackson, MS: tornado warnings | 75 | 28 | 63% | 87 | 89% | 20 min |
| NWS Jackson, MS: severe thunderstorm warnings | 453 | 278 | 39% | 760 | 80% | 23 min |
| NWS Jackson, MS: flash flood warnings | 140 | 91 | 35% | 282 | 88% | 186 min |
| NWS Memphis, TN: tornado warnings | 30 | 7 | 77% | 11 | 64% | 15 min |
| NWS Memphis, TN: severe thunderstorm warnings | 225 | 76 | 66% | 179 | 64% | 23 min |
| NWS Memphis, TN: flash flood warnings | 157 | 36 | 77% | 80 | 74% | 94 min |
| NWS Shreveport, LA: tornado warnings | 78 | 11 | 86% | 20 | 80% | 14 min |
| NWS Shreveport, LA: severe thunderstorm warnings | 256 | 125 | 51% | 404 | 72% | 22 min |
| NWS Shreveport, LA: flash flood warnings | 82 | 58 | 29% | 248 | 92% | 275 min |
| NWS Little Rock, AR: tornado warnings | 39 | 2 | 95% | 6 | 33% | 18 min |
| NWS Little Rock, AR: severe thunderstorm warnings | 310 | 105 | 66% | 224 | 84% | 20 min |
| NWS Little Rock, AR: flash flood warnings | 90 | 28 | 69% | 61 | 92% | 105 min |
| NWS Tulsa, OK: tornado warnings | 38 | 17 | 55% | 44 | 70% | 13 min |
| NWS Tulsa, OK: severe thunderstorm warnings | 251 | 108 | 57% | 274 | 82% | 24 min |
| NWS Tulsa, OK: flash flood warnings | 24 | 5 | 79% | 12 | 83% | 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
2,502 alerts are too many to list on one page. Narrow it to a product above, to a month in the chart, or to a county.
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Union County178
- Pulaski County167
- Columbia County166
- Mississippi County160
- White County160
- Faulkner County156
- Chicot County155
- Little River County153
- Saline County153
- Clark County144
- Hot Spring County144
- Bradley County144
- Washington County143
- Jefferson County143
- Sevier County142
- Lonoke County142
- Drew County142
- Hempstead County141
- Conway County141
- Ashley County140
- Arkansas County138
- Crittenden County137
- Calhoun County135
- Randolph County134
- Ouachita County134
- Benton County133
- Miller County133
- Howard County133
- Garland County132
- Craighead County132
- Perry County132
- Grant County132
- Cleveland County132
- Nevada County131
- Desha County131
- Madison County129
- Lafayette County128
- Lincoln County128
- Greene County127
- Jackson County126
35 more counties
- Woodruff County126
- Poinsett County125
- Dallas County124
- Lawrence County122
- Marion County120
- Independence County118
- Lee County117
- Baxter County117
- Prairie County116
- Pike County114
- Izard County113
- Carroll County112
- Cross County112
- Clay County112
- St. Francis County110
- Phillips County110
- Monroe County107
- Sharp County106
- Cleburne County102
- Stone County100
- Fulton County97
- Crawford County81
- Sebastian County81
- Montgomery County81
- Polk County79
- Yell County75
- Pope County67
- Scott County67
- Van Buren County65
- Franklin County64
- Logan County59
- Boone County53
- Johnson County53
- Searcy County49
- Newton County37
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20152017
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.