Weather alerts in Graham County, Arizona, 2019

106 weather alerts in 2019, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Graham County and its neighbors

Each county as a circle sized by its count in 2019. Tap one for its archive.

Alerts: 106
Warnings: 36
Watches: 24
Advisories: 34
Busiest month: July17 alerts
Busiest day: September 24, 20196 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 Graham County in 2019 had a tornado report inside them.

Graham County, 2019

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	1	0	100%	0
Severe thunderstorm warnings	11	2	82%	2	50%	3 min
Flash flood warnings	3	0	100%	0

Each office's whole area, 2019

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Tucson, AZ: tornado warnings	4	0	100%	3	0%
NWS Tucson, AZ: severe thunderstorm warnings	128	16	88%	39	64%	16 min
NWS Tucson, AZ: flash flood warnings	40	11	73%	23	78%	67 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, Mountain Time. Each opens its own page with the text, the map, the radar and the sounding.

Issued	Product	Office	Lasted
Jan 1, 10:30 AM MST	Winter Weather Advisory	TWC	3 hr
Jan 1, 1:30 PM MST	Winter Storm Warning	TWC	28 hr
Jan 4, 2:32 PM MST	Winter Weather Advisory	TWC	48 hr
Jan 7, 12:53 AM MST	Dense Fog Advisory	TWC	8 hr
Jan 11, 1:48 AM MST	Dense Fog Advisory	TWC	9 hr
Jan 20, 2:08 PM MST	Wind Advisory	TWC	29 hr
Feb 4, 3:14 PM MST	Winter Weather Advisory	TWC	44 hr
Feb 13, 1:58 PM MST	Flood Watch	TWC	45 hr
Feb 15, 3:04 AM MST	Areal Flood Advisory	TWC	5 hr
Feb 16, 2:59 PM MST	Winter Weather Advisory	TWC	67 hr
Feb 17, 2:28 PM MST	Winter Weather Advisory	TWC	44 hr
Feb 19, 2:49 AM MST	Winter Storm Watch	TWC	25 hr
Feb 20, 3:38 AM MST	Winter Storm Warning	TWC	64 hr
Feb 22, 2:23 PM MST	Hard Freeze Warning	TWC	19 hr
Mar 7, 5:13 PM MST	Wind Advisory	TWC	26 hr
Mar 10, 3:37 AM MST	Winter Storm Watch	TWC	24 hr
Mar 11, 3:31 AM MST	Winter Storm Warning	TWC	61 hr
Mar 12, 2:14 PM MST	Wind Advisory	TWC	30 hr
Apr 8, 2:50 AM MST	High Wind Watch	TWC	25 hr
Apr 8, 3:05 AM MST	Fire Weather Watch	TWC	25 hr
Apr 8, 1:36 PM MST	Fire Weather Watch	TWC	37 hr
Apr 9, 3:31 AM MST	High Wind Warning	TWC	35 hr
Apr 9, 3:31 AM MST	Wind Advisory	TWC	39 hr
Apr 9, 3:38 AM MST	Red Flag Warning	TWC	39 hr
Apr 9, 2:50 PM MST	Wind Advisory	TWC	18 hr
Apr 10, 3:02 AM MST	Red Flag Warning	TWC	40 hr
Apr 19, 2:59 AM MST	Fire Weather Watch	TWC	12 hr
Apr 19, 2:58 PM MST	Red Flag Warning	TWC	28 hr
Apr 28, 1:04 PM MST	Wind Advisory	TWC	30 hr
Apr 28, 1:09 PM MST	Red Flag Warning	TWC	30 hr
May 15, 2:27 PM MST	Wind Advisory	TWC	29 hr
May 19, 2:30 PM MST	Freeze Watch	TWC	24 hr
May 20, 2:26 PM MST	Freeze Warning	TWC	17 hr
May 21, 12:36 PM MST	Wind Advisory	TWC	31 hr
May 24, 2:25 AM MST	Fire Weather Watch	TWC	35 hr
May 25, 1:50 PM MST	Red Flag Warning	TWC	28 hr
Jun 13, 2:13 AM MST	Red Flag Warning	TWC	17 hr
Jun 13, 2:13 AM MST	Red Flag Warning	TWC	42 hr
Jul 14, 5:12 PM MST	Excessive Heat Warning	TWC	51 hr
Jul 22, 3:22 PM MST	Mesoscale Discussion	SPC	113 min
Jul 22, 5:55 PM MST	Special Weather Statement	TWC	35 min
Jul 22, 6:23 PM MST	Severe Thunderstorm Warning	TWC	37 min
Jul 23, 11:25 AM MST	Flash Flood Watch	TWC	9 hr
Jul 23, 4:53 PM MST	Special Weather Statement	TWC	37 min
Jul 23, 6:53 PM MST	Special Weather Statement	TWC	37 min
Jul 23, 6:59 PM MST	Areal Flood Advisory	TWC	2 hr
Jul 26, 3:18 PM MST	Special Weather Statement	TWC	27 min
Jul 26, 3:19 PM MST	Severe Thunderstorm Warning	TWC	25 min
Jul 29, 3:15 PM MST	Mesoscale Discussion	SPC	2 hr
Jul 29, 4:15 PM MST	Special Weather Statement	TWC	30 min
Jul 29, 4:46 PM MST	Severe Thunderstorm Warning	TWC	29 min
Jul 29, 5:00 PM MST	Flash Flood Warning	TWC	2 hr
Jul 29, 5:17 PM MST	Severe Thunderstorm Warning	TWC	43 min
Jul 30, 2:57 AM MST	Flash Flood Watch	TWC	22 hr
Jul 30, 6:18 PM MST	Flash Flood Warning	TWC	117 min
Aug 3, 4:23 PM MST	Severe Thunderstorm Warning	TWC	46 min
Aug 3, 5:47 PM MST	Severe Thunderstorm Warning	TWC	58 min
Aug 5, 2:38 PM MST	Special Weather Statement	TWC	67 min
Aug 5, 2:51 PM MST	Severe Thunderstorm Warning	TWC	39 min
Aug 9, 2:09 PM MST	Flash Flood Watch	TWC	39 hr
Aug 10, 6:35 PM MST	Areal Flood Advisory	TWC	3 hr
Aug 10, 7:12 PM MST	Flash Flood Warning	TWC	6 hr
Aug 11, 1:12 PM MST	Excessive Heat Watch	TWC	25 hr
Aug 12, 1:58 PM MST	Excessive Heat Warning	TWC	4 days
Aug 16, 1:16 PM MST	Excessive Heat Warning	TWC	5 days
Aug 27, 6:45 PM MST	Areal Flood Advisory	TWC	90 min
Aug 28, 4:19 PM MST	Areal Flood Advisory	TWC	3 hr
Aug 28, 4:43 PM MST	Special Weather Statement	TWC	47 min
Aug 28, 5:09 PM MST	Severe Thunderstorm Warning	TWC	51 min
Aug 30, 5:54 PM MST	Areal Flood Advisory	TWC	96 min
Aug 31, 4:20 PM MST	Special Weather Statement	TWC	55 min
Aug 31, 4:26 PM MST	Special Weather Statement	TWC	64 min
Sep 23, 2:57 AM MST	Flash Flood Watch	TWC	41 hr
Sep 23, 8:25 PM MST	Areal Flood Advisory	TWC	3 hr
Sep 23, 9:15 PM MST	Severe Thunderstorm Warning	TWC	45 min
Sep 23, 9:21 PM MST	Tornado Warning	TWC	24 min
Sep 23, 9:25 PM MST	Severe Thunderstorm Warning	TWC	50 min
Sep 24, 12:06 PM MST	Areal Flood Advisory	TWC	3 hr
Sep 24, 3:25 PM MST	Flash Flood Watch	TWC	35 hr
Oct 24, 3:10 AM MST	Freeze Watch	TWC	24 hr
Oct 25, 3:01 AM MST	Freeze Warning	TWC	30 hr
Oct 29, 2:17 PM MST	Freeze Watch	TWC	24 hr
Oct 29, 2:17 PM MST	Hard Freeze Watch	TWC	24 hr
Oct 30, 2:30 PM MST	Hard Freeze Warning	TWC	19 hr
Nov 6, 2:49 PM MST	Mesoscale Discussion	SPC	86 min
Nov 18, 2:31 PM MST	Flash Flood Watch	TWC	69 hr
Nov 19, 2:45 AM MST	Winter Storm Watch	TWC	12 hr
Nov 19, 2:30 PM MST	Winter Storm Warning	TWC	53 hr
Nov 21, 4:54 AM MST	Areal Flood Advisory	TWC	4 hr
Nov 22, 5:38 AM MST	Dense Fog Advisory	TWC	3 hr
Nov 25, 12:21 PM MST	Winter Storm Watch	TWC	50 hr
Nov 26, 2:22 PM MST	Flash Flood Watch	TWC	3 days
Nov 27, 3:27 AM MST	Wind Advisory	TWC	59 hr
Nov 27, 1:51 PM MST	Winter Storm Warning	TWC	53 hr
Nov 27, 5:58 PM MST	Areal Flood Advisory	TWC	3 hr
Nov 27, 9:12 PM MST	Areal Flood Advisory	TWC	3 hr
Nov 27, 11:17 PM MST	Areal Flood Advisory	TWC	5 hr
Nov 28, 11:43 AM MST	Flash Flood Watch	TWC	29 hr
Nov 28, 11:51 AM MST	High Wind Warning	TWC	23 hr
Nov 28, 11:51 AM MST	Wind Advisory	TWC	26 hr
Nov 29, 7:30 AM MST	Severe Thunderstorm Warning	TWC	45 min
Dec 9, 2:13 AM MST	Winter Weather Advisory	TWC	15 hr
Dec 10, 3:37 AM MST	Dense Fog Advisory	TWC	5 hr
Dec 23, 2:19 AM MST	Winter Weather Advisory	TWC	47 hr
Dec 25, 3:14 PM MST	Winter Storm Watch	TWC	11 hr
Dec 26, 2:33 AM MST	Winter Weather Advisory	TWC	63 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	11
Tornado Warning	1
Mesoscale Discussion	3
Special Weather Statement	9
Flooding
Flash Flood Warning	3
Flash Flood Watch	8
Flood Watch	1
Areal Flood Advisory	12
Winter
Winter Storm Warning	5
Winter Storm Watch	5
Winter Weather Advisory	8
Heat
Excessive Heat Warning	3
Excessive Heat Watch	1
Cold
Freeze Warning	2
Hard Freeze Warning	2
Freeze Watch	3
Hard Freeze Watch	1
Wind and dust
High Wind Warning	2
High Wind Watch	1
Wind Advisory	10
Fire
Red Flag Warning	7
Fire Weather Watch	4
Fog and smoke
Dense Fog Advisory	4

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record Forecast The radar archive 2018 2020

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.