Alert archive / Arizona / Special Weather Statements in 2018
Special Weather Statement, NWS Tucson, AZ
NWS Tucson, AZ issued this special weather statement at Aug 8, 2018, 3:13 PM MST for Graham County, Arizona. It was in force for 77 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
- Aug 8, 2018, 3:13 PM MST (22:13 UTC)
- Expired
- Aug 8, 2018, 4:30 PM MST
- In force
- 77 min
- Issued by
- NWS Tucson, AZ
County Graham County, AZ
The radar
The Phoenix radar (KIWA), 157 km from the middle of the area, began a volume at 22:16 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 12:00Z, 10.2 hours before the alert went out and 159 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
- 159 J/kg
- Mixed-layer CIN
- -322 J/kg
- Mixed-layer LCL
- 1625 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- -9 m²/s²
- 0-3 km storm-relative helicity
- 169 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.0
The text
As transmitted.
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</html>What forecasters said that day
The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Tucson, AZ wrote its last area forecast discussion before this special weather statement went out at Aug 8, 9:45 AM MST, 5 hours 28 minutes earlier.
Area forecast discussion, Aug 8, 9:45 AM MST, 5 hours 28 minutes before
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Local storm report, Aug 8, 9:31 AM MST, 5 hours 42 minutes before
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</html>Special weather statement, Aug 8, 1:34 PM MST, 1 hour 39 minutes before
Special Weather Statement
National Weather Service Tucson AZ
134 PM MST WED AUG 8 2018
AZZ510-082100-
White Mountains of Graham and Greenlee Counties including Hannagan
Meadow-
134 PM MST WED AUG 8 2018
...SIGNIFICANT WEATHER ADVISORY FOR NORTH CENTRAL GRAHAM AND NORTHERN
GREENLEE COUNTIES UNTIL 200 PM MST...
At 133 PM MST, Doppler radar was tracking a strong thunderstorm near
Hannagan Meadow, moving south at 5 mph.
Dime size hail and winds in excess of 40 mph will be possible with
this storm.
Locations impacted include...
Hannagan Meadow.
LAT...LON 3363 10908 3343 10964 3354 10969 3357 10967
3361 10960 3362 10953 3366 10948 3371 10945
3371 10941 3373 10935 3378 10935 3378 10917
TIME...MOT...LOC 2033Z 008DEG 6KT 3369 10938
RHSpecial weather statement, Aug 8, 3:13 PM MST, 0 minutes before
Special Weather Statement
National Weather Service Tucson AZ
313 PM MST WED AUG 8 2018
AZZ509-510-082330-
Upper Gila River and Aravaipa Valleys including Clifton/Safford-White
Mountains of Graham and Greenlee Counties including Hannagan Meadow-
313 PM MST WED AUG 8 2018
...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL GRAHAM COUNTY UNTIL 430
PM MST...
At 311 PM MST, Doppler radar was tracking strong thunderstorms along
a line extending from 17 miles south of Seven Mile to 25 miles north
of Safford to 18 miles northwest of Morenci. Movement was southwest
at 20 mph.
Half inch hail and winds in excess of 45 mph will be possible with
these storms.
Locations impacted include...
Safford, Thatcher, Pima, Calva, Fort Thomas, Arsenic Tubs, Solomon
and Bylas.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Heavy rainfall is also occurring with these storms, and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.
These storms may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.
&&
LAT...LON 3358 10991 3332 10979 3327 10950 3271 10956
3308 11017 3340 11036 3343 11034 3344 11020
3346 11016 3346 11001 3358 11000 3357 10993
TIME...MOT...LOC 2211Z 058DEG 19KT 3354 10995 3330 10986 3321 10959
MeyerThe office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 7, 5:11 PM MST | Special Weather Statement | TWC | Pinal | 34 min |
| Aug 7, 5:17 PM MST | Special Weather Statement | TWC | Santa Cruz | 43 min |
| Aug 7, 5:23 PM MST | Special Weather Statement | TWC | Graham | 52 min |
| Aug 7, 5:28 PM MST | Areal Flood Advisory | TWC | Pima, Pinal | 2 hr |
| Aug 7, 5:34 PM MST | Severe Thunderstorm Warning | TWC | Pima | 41 min |
| Aug 7, 5:51 PM MST | Dust Storm Advisory | TWC | Pima | 54 min |
| Aug 7, 6:03 PM MST | Special Weather Statement | TWC | Cochise | 42 min |
| Aug 7, 6:05 PM MST | Severe Thunderstorm Warning | TWC | Pima | 40 min |
| Aug 7, 6:09 PM MST | Special Weather Statement | TWC | Pima | 51 min |
| Aug 7, 6:13 PM MST | Special Weather Statement | TWC | 47 min | |
| Aug 7, 6:32 PM MST | Flash Flood Warning | TWC | Pima | 118 min |
| Aug 7, 6:54 PM MST | Special Weather Statement | TWC | Santa Cruz | 36 min |
| Aug 7, 6:59 PM MST | Special Weather Statement | TWC | Pinal | 61 min |
| Aug 7, 7:42 PM MST | Special Weather Statement | TWC | Cochise | 33 min |
| Aug 7, 7:56 PM MST | Areal Flood Advisory | TWC | Cochise | 109 min |
| Aug 7, 8:06 PM MST | Special Weather Statement | TWC | Pinal | 39 min |
| Aug 7, 8:20 PM MST | Special Weather Statement | TWC | Cochise | 40 min |
| Aug 7, 8:24 PM MST | Severe Thunderstorm Warning | TWC | Pima, Santa Cruz | 51 min |
| Aug 7, 8:44 PM MST | Flash Flood Warning | TWC | Santa Cruz | 2 hr |
| Aug 7, 9:32 PM MST | Areal Flood Advisory | TWC | Pima, Pinal | 3 hr |
| Aug 7, 9:38 PM MST | Severe Thunderstorm Warning | TWC | Pima, Santa Cruz | 29 min |
| Aug 8, 1:05 AM MST | Special Weather Statement | TWC | 55 min | |
| Aug 8, 1:34 PM MST | Special Weather Statement | TWC | Greenlee | 26 min |
| Aug 8, 4:35 PM MST | Severe Thunderstorm Warning | TWC | Graham | 40 min |
| Aug 8, 4:58 PM MST | Areal Flood Advisory | TWC | Graham | 3 hr |
Nearby
Special Weather Statements in Arizona, 2018Every special weather statement in 2018
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.