Alert archive / Arizona / Special Weather Statements in 2017
Special Weather Statement, NWS Tucson, AZ
NWS Tucson, AZ issued this special weather statement at Jul 19, 2017, 8:21 PM MST for Graham County, Arizona. It was in force for 39 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Jul 19, 2017, 8:21 PM MST (03:21 UTC)
- Expired
- Jul 19, 2017, 9:00 PM MST
- In force
- 39 min
- Issued by
- NWS Tucson, AZ
County Graham County, AZ
The radar
The Tucson radar (KEMX), 138 km from the middle of the area, began a volume at 03:23 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Tuscon, AZ (KDMA), launched 00:00Z, 3.4 hours before the alert went out and 136 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 709 J/kg
- Mixed-layer CIN
- -129 J/kg
- Mixed-layer LCL
- 1571 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- -4 m²/s²
- 0-3 km storm-relative helicity
- 82 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
898 WWUS85 KTWC 200321 SPSTWC Special Weather Statement National Weather Service Tucson AZ 821 PM MST WED JUL 19 2017 AZZ509>511-200400- Upper Gila River and Aravaipa Valleys including Clifton/Safford-White Mountains of Graham and Greenlee Counties including Hannagan Meadow-Galiuro and Pinaleno Mountains including Mount Graham- 821 PM MST WED JUL 19 2017 ...SIGNIFICANT WEATHER ADVISORY FOR SOUTH CENTRAL GRAHAM COUNTY UNTIL 900 PM MST... At 820 PM MST, Doppler radar was tracking a strong thunderstorm over Safford, moving west northwest at 20 mph. Winds in excess of 40 mph and heavy rain will be possible with this storm. Locations impacted include... Safford, Thatcher, Pima, Solomon, Swift Trail Junction and Frye Mesa Dam. PRECAUTIONARY/PREPAREDNESS ACTIONS... Heavy rainfall is also occurring with this storm, and may lead to localized flooding. Do not drive your vehicle through flooded roadways. && LAT...LON 3289 10957 3268 10959 3277 11000 3310 10983 TIME...MOT...LOC 0320Z 108DEG 23KT 3283 10970 $$
The office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 19, 5:03 PM MST | Areal Flood Advisory | TWC | Pinal | 117 min |
| Jul 19, 6:15 PM MST | Dust Storm Warning | TWC | Cochise, Graham, Greenlee | 105 min |
| Jul 19, 6:23 PM MST | Special Weather Statement | TWC | Santa Cruz | 52 min |
| Jul 19, 9:26 PM MST | Flash Flood Warning | TWC | Graham | 94 min |
| Jul 19, 10:54 PM MST | Areal Flood Advisory | TWC | Graham | 3 hr |
| Jul 20, 1:03 PM MST | Special Weather Statement | TWC | Santa Cruz | 27 min |
| Jul 20, 1:20 PM MST | Special Weather Statement | TWC | Santa Cruz | 25 min |
| Jul 20, 1:38 PM MST | Areal Flood Advisory | TWC | Santa Cruz | 2 hr |
| Jul 20, 1:54 PM MST | Flash Flood Warning | TWC | Santa Cruz | 2 hr |
| Jul 20, 3:56 PM MST | Areal Flood Advisory | TWC | Santa Cruz | 2 hr |
Nearby
Special Weather Statements in Arizona, 2017Every special weather statement in 2017
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.