Alert archive / Arizona / Special Weather Statements in 2019

Special Weather Statement, NWS Tucson, AZ

December 9, 2019Pima County, Arizona

NWS Tucson, AZ issued this special weather statement at Dec 9, 2019, 3:13 PM MST for Pima County, Arizona. It was in force for 32 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
Dec 9, 2019, 3:13 PM MST (22:13 UTC)
Expired
Dec 9, 2019, 3:45 PM MST
In force
32 min
Issued by
NWS Tucson, AZ

County Pima County, AZ

The radar

The Phoenix radar (KIWA), 120 km from the middle of the area, began a volume at 22:17 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 (KTUS), launched 12:00Z, 10.2 hours before the alert went out and 108 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.

Skew-T log-pSkew-T log-p diagram, Tuscon, AZ at 12:00Z on 2019-12-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 43 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Tuscon, AZ at 12:00Z on 2019-12-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 40 square meters per square second.1939587897117136Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
43 J/kg
Mixed-layer CIN
-99 J/kg
Mixed-layer LCL
948 m above ground
0-6 km bulk shear
80 kt
0-1 km storm-relative helicity
40 m²/s²
0-3 km storm-relative helicity
87 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

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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 Dec 9, 2:47 PM MST, 26 minutes earlier.

Area forecast discussion, Dec 9, 2:47 PM MST, 26 minutes before
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In the hours before

Special weather statement, Dec 9, 9:16 AM MST, 5 hours 57 minutes before
Special Weather Statement
National Weather Service Tucson AZ
916 AM MST Mon Dec 9 2019

AZZ502-504-505-091700-
Tohono O'odham Nation including Sells-Tucson Metro Area including
Tucson/Green Valley/Marana/Vail-South Central Pinal County including
Eloy/Picacho Peak State Park-
916 AM MST Mon Dec 9 2019

...SIGNIFICANT WEATHER ADVISORY FOR NORTH CENTRAL PIMA AND SOUTH
CENTRAL PINAL COUNTIES UNTIL 1000 AM MST...

At 914 AM MST, Doppler radar was tracking strong thunderstorms along
a line extending from near Picacho Peak State Park to 13 miles
northwest of San Isidro. Movement was northeast at 20 to 25 mph.

Half inch hail and winds in excess of 40 mph will be possible with
these storms.

Locations impacted include...
Marana, Avra Valley, Picacho, Picacho Peak State Park, Red Rock,
Queens Well and Silver Bell.

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.

&&

LAT...LON 3283 11103 3218 11145 3213 11185 3271 11150
TIME...MOT...LOC 1614Z 245DEG 18KT 3268 11139 3218 11181

Meyer
Special weather statement, Dec 9, 10:04 AM MST, 5 hours 9 minutes before
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Special weather statement, Dec 9, 2:02 PM MST, 1 hour 11 minutes before
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Special weather statement, Dec 9, 2:35 PM MST, 38 minutes before
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Special weather statement, Dec 9, 3:13 PM MST, 0 minutes before
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The office that day

Everything else NWS Tucson, AZ issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Dec 9, 2:13 AM MSTWinter Weather AdvisoryTWCCochise, Graham, Pima, Pinal15 hr
Dec 9, 6:03 AM MSTAreal Flood AdvisoryTWCPima, Pinal117 min
Dec 9, 8:14 AM MSTSpecial Weather StatementTWCPima46 min
Dec 9, 9:16 AM MSTSpecial Weather StatementTWCPinal44 min
Dec 9, 9:36 AM MSTSevere Thunderstorm WarningTWCPima, Pinal39 min
Dec 9, 10:04 AM MSTSpecial Weather StatementTWCPinal41 min
Dec 9, 2:02 PM MSTSpecial Weather StatementTWCCochise28 min
Dec 9, 2:35 PM MSTSpecial Weather StatementTWCPima25 min

Nearby

Special Weather Statements in Arizona, 2019Every special weather statement in 2019

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.