Alert archive / Arizona / Severe Thunderstorm Warnings in 2009
Severe Thunderstorm Warning 21, NWS Flagstaff, AZ
NWS Flagstaff, AZ issued this severe thunderstorm warning at Sep 19, 2009, 12:38 PM MDT for Navajo County, Arizona. It was in force for 37 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
- Sep 19, 2009, 12:38 PM MDT (18:38 UTC)
- Expired
- Sep 19, 2009, 1:15 PM MDT
- In force
- 37 min
- Issued by
- NWS Flagstaff, AZ
- Area
- Storm-based polygon
County Navajo County, AZ
The radar
The Flagstaff radar (KFSX), 90 km from the middle of the area, began a volume at 18:40 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
Flgstf/Belemont, AZ (KFGZ), launched 12:00Z, 6.6 hours before the alert went out and 174 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
- 96 J/kg
- Mixed-layer CIN
- -54 J/kg
- Mixed-layer LCL
- 1467 m above ground
- 0-6 km bulk shear
- 12 kt
- 0-1 km storm-relative helicity
- 10 m²/s²
- 0-3 km storm-relative helicity
- 39 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS55 KFGZ 191838 SVRFGZ AZC017-191915- /O.NEW.KFGZ.SV.W.0021.090919T1838Z-090919T1915Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE FLAGSTAFF AZ 1138 AM MST SAT SEP 19 2009 THE NATIONAL WEATHER SERVICE IN FLAGSTAFF HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTH CENTRAL NAVAJO COUNTY IN NORTHEAST ARIZONA... * UNTIL 1215 PM MST * AT 1135 AM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL. THIS STORM WAS LOCATED NEAR PINEDALE...OR 16 MILES WEST OF SHOW LOW... AND MOVING EAST AT 15 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... PINEDALE BY 1150 AM MST... LINDEN BY 1210 PM MST... PRECAUTIONARY/PREPAREDNESS ACTIONS... A SEVERE THUNDERSTORM WARNING IS ISSUED FOR STORMS PRODUCING HAIL 1 INCH DIAMETER OR LARGER...AND/OR WINDS GREATER THAN 57 MPH. && LAT...LON 3436 11004 3408 11012 3416 11063 3449 11054 TIME...MOT...LOC 1837Z 287DEG 13KT 3430 11031 $$ NP
1 follow-up statement
000 WWUS55 KFGZ 191858 SVSFGZ SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE FLAGSTAFF AZ 1158 AM MST SAT SEP 19 2009 AZC017-191915- /O.CON.KFGZ.SV.W.0021.000000T0000Z-090919T1915Z/ NAVAJO AZ- 1158 AM MST SAT SEP 19 2009 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1215 PM MST FOR SOUTH CENTRAL NAVAJO COUNTY... AT 1156 AM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL. THIS STORM WAS LOCATED NEAR PINEDALE...OR 11 MILES WEST OF SHOW LOW...MOVING EAST AT 15 MPH. THE SEVERE THUNDERSTORM WILL BE NEAR... PINEDALE BY 1205 PM MST... LINDEN BY 1210 PM MST... A SEVERE THUNDERSTORM WARNING IS ISSUED FOR STORMS PRODUCING HAIL 1 INCH DIAMETER OR LARGER...AND/OR WINDS GREATER THAN 57 MPH. LAT...LON 3436 11004 3408 11012 3416 11063 3449 11054 TIME...MOT...LOC 1857Z 287DEG 13KT 3428 11022 $$ NP
The office that day
Everything else NWS Flagstaff, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 19, 1:38 PM MDT | Severe Thunderstorm Warning | FGZ | Gila, Navajo | 22 min |
| Sep 19, 3:24 PM MDT | Areal Flood Advisory | FGZ | Gila | 81 min |
| Sep 19, 3:30 PM MDT | Flash Flood Warning | FGZ | Gila | 87 min |
| Sep 19, 4:26 PM MDT | Areal Flood Advisory | FGZ | Yavapai | 103 min |
Nearby
Severe Thunderstorm Warnings in Arizona, 2009Every severe thunderstorm warning in 2009
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.