Alert archive / Idaho / Severe Thunderstorm Warnings in 2014
Severe Thunderstorm Warning 23, NWS Pocatello, ID
NWS Pocatello, ID issued this severe thunderstorm warning at Jul 21, 2014, 7:44 PM MDT for Cassia County, Idaho. It was in force for 46 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Jul 21, 2014, 7:44 PM MDT (01:44 UTC)
- Expired
- Jul 21, 2014, 8:30 PM MDT
- In force
- 46 min
- Issued by
- NWS Pocatello, ID
- Area
- Storm-based polygon
County Cassia County, ID
The radar
The Pocatello radar (KSFX), 118 km from the middle of the area, began a volume at 01:43 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
Elko, NV (KLKN), launched 00:00Z, 1.7 hours before the alert went out and 165 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
- 40 J/kg
- Mixed-layer CIN
- -72 J/kg
- Mixed-layer LCL
- 2830 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- -16 m²/s²
- 0-3 km storm-relative helicity
- 139 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.0
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Pocatello, ID wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 21, 2:56 PM MDT, 4 hours 48 minutes earlier.
Area forecast discussion, Jul 21, 2:56 PM MDT, 4 hours 48 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE POCATELLO ID ISSUED BY NATIONAL WEATHER SERVICE BOISE ID 256 PM MDT MON JUL 21 2014 .DISCUSSION...BAND OF MONSOON MOISTURE CAUGHT UP IN SOUTHWEST FLOW OVER THE AREA IS SUPPORTING SHOWERS AND THUNDERSTORMS ACROSS THE FORECAST AREA THIS AFTERNOON. DEEP MOISTURE AND MODERATE SHEAR VALUES ARE SUPPORTING SOME STRONG CELLS CAPABLE OF SIGNIFICANT HAIL AND WIND GUSTS TO 50 MPH. BUT OVERALL...THINK THAT HEAVY RAIN IS THE MAIN THREAT. THESE STORMS SHOULD CONTINUE INTO THE EVENING...BUT WEAKEN AND DIE OUT AFTER SUNSET. FLOW BECOMES A BIT MORE SOUTHERLY BY TUESDAY...PUSHING BAND OF MOISTURE FURTHER NORTH...SO THAT SHOWERS AND THUNDERSTORMS SHOULD BE CONFINED MAINLY TO THE CENTRAL IDAHO MOUNTAINS. PACIFIC LOW WILL PUSH INLAND WEDNESDAY INTO THURSDAY. THIS BRINGS DRIER AND COOLER AIR INTO THE AREA ON THURSDAY...WITH THE POTENTIAL FOR SIGNIFICANT WINDS. BEYOND THAT...DRY AND SEASONAL TEMPERATURES PREVAIL THROUGH THE WEEKEND. THE RIDGE BEGINS TO BUILD BACK NORTHWARD BY EARLY IN THE WEEK...WITH WARMING TEMPERATURES AND EVENTUALLY WITH THE POTENTIAL FOR SOME MONSOON MOISTURE TO RETURN. && .AVIATION...GENERALLY VFR. WIDESPREAD THUNDERSTORMS WITH HEAVY RAIN...AND POTENTIAL FOR GUSTS TO 50 MPH THROUGH ABOUT 03Z. ON TUESDAY...MOISTURE SHIFTS SLIGHTLY NORTHWARD WITH THE THUNDERSTORM THREAT MOSTLY CONFINED TO AREAS AROUND KSUN AND NORTHWARD. && .FIRE WEATHER...CONTINUING RED FLAG WARNING FOR ZONES 422 425 427 AND 410 THROUGH 03Z THIS EVENING WITH SCATTERED THUNDERSTORMS. SOME OF THESE PRODUCING HEAVY RAIN...BUT ABUNDANT LIGHTNING AND WIND GUSTS TO 50 MPH COULD DEFINITELY CAUSE NEW FIRE STARTS AND ERRATIC FIRE BEHAVIOR. THUNDERSTORM THREAT MOVES SLIGHTLY NORTH ON TUESDAY...AND SHOULD FAVOR UPSLOPE AREAS ON THE NORTH SIDE OF THE SNAKE RIVER PLAIN. DRIER CONDITIONS EXPECTED WEDNESDAY AND BEYOND. && .PIH WATCHES/WARNINGS/ADVISORIES... RED FLAG WARNING UNTIL 9 PM MDT MONDAY FOR IDAHO FIRE ZONES 410 422 425 AND 427. &&
In the hours before
Special weather statement, Jul 21, 3:14 PM MDT, 4 hours 30 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE POCATELLO ISSUED BY NATIONAL WEATHER SERVICE BOISE ID 314 PM MDT MON JUL 21 2014 IDZ021>023-212200- LOWER SNAKE RIVER PLAIN ID-CARIBOU HIGHLANDS ID- SOUTH CENTRAL HIGHLANDS ID- 314 PM MDT MON JUL 21 2014 ...SIGNIFICANT WEATHER ADVISORY FOR NORTH CENTRAL ONEIDA...WEST CENTRAL CARIBOU...CENTRAL BANNOCK AND SOUTHEASTERN POWER COUNTIES UNTIL 400 PM MDT... AT 313 PM MDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 10 MILES SOUTHEAST OF FORT HALL BANNOCK PEAK...OR 22 MILES SOUTHEAST OF NEELEY...MOVING NORTHEAST AT 35 MPH. NICKEL SIZE HAIL AND WINDS IN EXCESS OF 40 MPH WILL BE POSSIBLE WITH THIS STORM. THIS STRONG THUNDERSTORM WILL BE NEAR... ARBON AROUND 320 PM MDT... HAWKINS RESERVOIR AROUND 330 PM MDT... MCCAMMON AROUND 350 PM MDT... POCATELLO...INKOM...AND PORTNEUF GAP AROUND 400 PM MDT. PRECAUTIONARY/PREPAREDNESS ACTIONS... WHEN SAFE TO DO SO...PLEASE RELAY STORM REPORTS TO THE NATIONAL WEATHER SERVICE IN POCATELLO IDAHO VIA LOCAL LAW ENFORCEMENT. && LAT...LON 4231 11253 4246 11281 4293 11240 4270 11204 TIME...MOT...LOC 2113Z 216DEG 32KT 4246 11262 TB
Special weather statement, Jul 21, 5:28 PM MDT, 2 hours 16 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE POCATELLO/IDAHO FALLS ISSUED BY NATIONAL WEATHER SERVICE SALT LAKE CITY UT 528 PM MDT MON JUL 21 2014 IDZ020-021-220015- LOWER SNAKE RIVER PLAIN ID-UPPER SNAKE RIVER PLAIN ID- 528 PM MDT MON JUL 21 2014 ...SIGNIFICANT WEATHER ADVISORY FOR NORTH CENTRAL POWER... NORTHWESTERN BANNOCK AND CENTRAL BINGHAM COUNTIES UNTIL 615 PM MDT... AT 526 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 5 MILES NORTH OF POCATELLO...MOVING NORTHEAST AT 40 MPH. HALF INCH HAIL AND WIND GUSTS UP TO 50 MPH WILL BE POSSIBLE ALONG WITH HEAVY RAINFALL. LOCATIONS IMPACTED INCLUDE... BLACKFOOT...GOSHEN...FIRTH...FORT HALL EAGLE LODGE...ROCKFORD...FORT HALL BUFFALO LODGE...ROSE...PINGREE...FORT HALL TOWNSITE...MORELAND AND BASALT. PRECAUTIONARY/PREPAREDNESS ACTIONS... IF THREATENING WEATHER APPROACHES...TAKE SHELTER IN A STURDY BUILDING. && LAT...LON 4297 11248 4294 11275 4335 11250 4334 11203 TIME...MOT...LOC 2326Z 219DEG 35KT 4297 11264 MPS
Local storm report, Jul 21, 5:42 PM MDT, 2 hours 2 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE POCATELLO ID
542 PM MDT MON JUL 21 2014
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0541 PM HAIL 6 W LORENZO 43.74N 111.99W
07/21/2014 E0.25 INCH JEFFERSON ID TRAINED SPOTTER
PEA SIZE HAIL
&&
DPHELPSLocal storm report, Jul 21, 7:07 PM MDT, 37 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE POCATELLO ID
707 PM MDT MON JUL 21 2014
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0541 PM HAIL 12 ENE IDAHOME 42.47N 113.15W
07/21/2014 E0.25 INCH CASSIA ID TRAINED SPOTTER
PEA SIZE HAIL
&&
DPHELPSLocal storm report, Jul 21, 7:12 PM MDT, 32 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE POCATELLO ID
712 PM MDT MON JUL 21 2014
...TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
...DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0705 PM HAIL 1 ENE POCATELLO 42.89N 112.45W
07/21/2014 M0.25 INCH BANNOCK ID PUBLIC
REPORTED VIA FACEBOOK.
&&
NWS POCATELLO ID
IRIS SYSTEMSpecial weather statement, Jul 21, 7:14 PM MDT, 30 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE POCATELLO ISSUED BY NATIONAL WEATHER SERVICE BOISE ID 714 PM MDT MON JUL 21 2014 IDZ019-220200- UPPER SNAKE HIGHLANDS ID- 714 PM MDT MON JUL 21 2014 ...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN FREMONT COUNTY UNTIL 800 PM MDT... AT 713 PM MDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR CHESTER...OR 9 MILES WEST OF ASHTON...MOVING NORTHEAST AT 20 MPH. DIME SIZE HAIL AND WINDS IN EXCESS OF 40 MPH WILL BE POSSIBLE WITH THIS STORM. THIS STRONG THUNDERSTORM WILL BE NEAR... NORTHERN SAINT ANTHONY SAND DUNES AROUND 720 PM MDT. ASHTON AND MARYSVILLE AROUND 750 PM MDT. WARM RIVER AROUND 800 PM MDT. PRECAUTIONARY/PREPAREDNESS ACTIONS... WHEN SAFE TO DO SO...PLEASE RELAY STORM REPORTS TO THE NATIONAL WEATHER SERVICE IN POCATELLO IDAHO VIA LOCAL LAW ENFORCEMENT...OR NWS POCATELLO FACEBOOK AND TWITTER ACCOUNTS. && LAT...LON 4395 11163 4408 11180 4434 11152 4414 11126 TIME...MOT...LOC 0113Z 226DEG 12KT 4408 11165 BW
The office that day
Everything else NWS Pocatello, ID issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 21, 6:39 PM MDT | Severe Thunderstorm Warning | PIH | Cassia, Oneida, Power | 51 min |
| Jul 21, 6:55 PM MDT | Severe Thunderstorm Warning | PIH | Power | 50 min |
| Jul 21, 7:14 PM MDT | Special Weather Statement | PIH | Fremont | 46 min |
| Jul 21, 7:16 PM MDT | Severe Thunderstorm Warning | PIH | Bannock, Power | 44 min |
| Jul 21, 7:37 PM MDT | Areal Flood Advisory | PIH | Bannock, Power | 113 min |
| Jul 21, 8:01 PM MDT | Areal Flood Advisory | PIH | Cassia | 3 hr |
| Jul 21, 8:25 PM MDT | Severe Thunderstorm Warning | PIH | Cassia, Power | 35 min |
| Jul 22, 2:55 AM MDT | Fire Weather Watch | PIH | Bingham, Blaine, Boise, Bonneville, Butte, Cassia and 11 more | 34 hr |
Nearby
Severe Thunderstorm Warnings in Idaho, 2014Every severe thunderstorm warning in 2014
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.